| 2026-07-01 | 8:00 AM | 0.00 | 0.0 | 0.00 | 0.0 | 0.00 | | Clear skies through 10:24 (smoke noted by late morning). 13:19: first Cu fractus and Sc developed. 15:50–19:18: Ac, Ci, and nearby Cb developed. The broken Sc opacus observed from 17:04–20:03 was associated with a thunderstorm passing nearby that did not affect the station-no precipitation or lightning was observed. |
| 2026-06-30 | 8:00 AM | 0.00 | 0.0 | 0.00 | 0.0 | 0.00 | | 8:05 AM – Few Cu fractus and Sc floccus with near-surface smoke. 11:25–11:28 AM – Fair-weather Cu humilis/fractus continued as smoke cleared. 1:17–1:18 PM – Cloud cover increased to scattered with Cu humilis, Cu fractus, and a patch of Sc stratiformis opacus. 3:23–5:45 PM – Returned to a few Sc floccus and shallow Cu fractus/humilis. |
| 2026-06-29 | 8:00 AM | 0.00 | 0.0 | 0.00 | 0.0 | 0.00 | | 07:56–15:54 MDT: Clear skies despite persistent smoke. 16:47: Few Cu hum developed. 18:13–19:26: Few Sc, then broken Cs un followed by Ac flo and Ac cas. |
| 2026-06-28 | 7:58 AM | 0.00 | 0.0 | 0.00 | 0.0 | 0.00 | | 7:33–8:04 AM: Scattered to broken altocumulus, including a brief Ac perlucidus deck. 9:00 AM–4:00 PM: Transition to scattered fair-weather cumulus with increasing stratocumulus through the afternoon. 5:26–6:23 PM: Broken stratocumulus with virga observed, but no precipitation reached the surface. After 6:20 PM smoke from Snyder wildfire became noticeable. |
| 2026-06-27 | 7:32 AM | T | NA | NA | NA | NA | | 0710–1330 MDT: Scattered altocumulus and cumulus developed into growing Cu congestus under dry conditions. 1745–1810 MDT: Virga preceded a brief rain shower with distant thunder as Cb moved over the station. Rain ended quickly, followed by broken stratus fractus/stratocumulus, with only a few cirrus remaining by 2029 MDT. |
| 2026-06-26 | 7:18 AM | 0.26 | 0.0 | 0.00 | 0.0 | 0.00 | | 08:05–10:30 MDT: Steady rain with overcast skies. Clouds gradually broke after noon with scattered cumulus through the afternoon. 17:35 MDT: Thunderstorm approached with visible shelf cloud/arcus. 17:58 MDT: Brief pea-sized hail and nearby lightning, followed by moderate rain through ~19:20 MDT. Rain gauge funnel remained installed during the storm; no obvious hail-related issues were observed. |
| 2026-06-25 | 8:04 AM | 0.04 | 0.0 | 0.00 | 0.0 | 0.00 | | 0743–1110: Persistent overcast St neb transitioned to Sc str, remaining overcast through late morning. 1310–1545: Cloud deck became broken with mixed Sc, Cu hum, and As. 1730: Mammatus observed. 1743–2045: Intermittent light rain with St fra, Sc str op, and As tr; nearby and distant thunder noted, but no lightning observed at the site. Ground became wet by 2108. |
| 2026-06-24 | 7:52 AM | T | 0.0 | 0.00 | 0.0 | 0.00 | | 07:30–08:00 MDT OVC St. Clouds became BKN Sc by 08:30 with SCT Cu through early afternoon. Brief trace showers occurred around 14:30–15:00 MDT. Thunderstorms passed north of the station during the evening; distant thunder/lightning noted 18:40–19:10 MDT, with skies becoming BKN-OVC and low clouds observed. Total precipitation accumulation was a trace. 21:30–00:20 MST: Nearby thunderstorms remained north and south of the station with distant lightning visible and only trace precipitation. 07:43 MST: Overcast St neb; dry surface |
| 2026-06-23 | 8:00 AM | 0.00 | 0.0 | 0.00 | 0.0 | 0.00 | | 08:36 MST clear skies. By 10:58 thin Ci intortus had developed. Scattered fair-weather Cu and Sc developed from 11:20–14:30, with a brief tower noted around 12:30. Evening cloud cover increased, with Sc stratiformis and patches of St fractus producing virga between 18:39–20:22. |
| 2026-06-22 | 8:00 AM | 0.00 | 0.0 | 0.00 | 0.0 | 0.00 | | 0745 MST: Low stratus early, transitioning to cirrus fibratus by 0800. Fair-weather Cu hum/Cu fra developed by 0930 with occasional Sc flo and lenticular clouds. Cu congestus noted 1115–1315 with isolated Cb observed at 1615 and 1951. Cloud cover remained mostly few to scattered throughout the day, with dry surface conditions |
| 2026-06-21 | 7:29 AM | T | 0.0 | 0.00 | 0.0 | 0.00 | | 07:38 MST – Overcast St neb at sunrise.
07:48–10:02 MST – Broken Sc str (du, pe) transitioned to scattered Sc flo and Cu fra.
12:16–13:57 MST – Increasing instability with Sc cas, Cu med, and Cu con under broken skies.
15:22–15:37 MST – Brief convective shower as nearby Cb developed; distant thunder heard 15:25 MST with light rain and wet ground by 15:37 MST. Virga observed before precipitation reached the surface.
17:45–20:26 MST – Returned to broken Sc str pe, Sc flo, and isolated Cu con with dry conditions. |
| 2026-06-20 | 8:00 AM | 0.00 | 0.0 | 0.00 | 0.0 | 0.00 | | 07:52–07:53 MST: Scattered high clouds with Ci uncinus and a thin Cs veil (neb/fib).
10:08 MST: Few Ci spissatus remained.
11:43–12:18 MST: Mostly clear with isolated Ac and a few Cc stratiformis.
16:04 MST: Scattered Ac floccus beneath bands of Ci spissatus intortus.
19:29 MST: Only isolated Ac remained; by 20:43 MST skies were clear. |
| 2026-06-19 | 8:00 AM | 0.00 | 0.0 | 0.00 | 0.0 | 0.00 | | 7:20 AM: Clear skies. 8:50 AM–12:06 PM: Few Cs (neb ? fib). 12:13–6:53 PM: Few Cu fra with Sc flo and high Cs/Ci fib; dry throughout. 7:32–8:50 PM: Ci fib in and Sc increased from scattered to broken (Sc tr). |
| 2026-06-18 | 8:00 AM | 0.00 | 0.0 | 0.00 | 0.0 | 0.00 | | 0851–1131 MDT: Clear skies observed. 1225–1226 MDT: First fair-weather Cu humilis and Cu fractus developed (few coverage). 1428–1543 MDT: Scattered Sc floccus mixed with Cu humilis/fractus formed a shallow cellular cloud field. 1847 MDT: Similar scattered Sc floccus and Cu fractus persisted into the evening. |
| 2026-06-17 | 8:00 AM | 0.00 | 0.0 | 0.00 | 0.0 | 0.00 | | 8:10 AM: Thin cirrus/cirrostratus overhead. 11:20 AM–1:00 PM: Scattered stacked lenticular altocumulus developed and persisted. 5:00–6:45 PM: Transition to isolated stratocumulus and fair-weather cumulus beneath lingering high clouds. |
| 2026-06-16 | 8:00 AM | 0.00 | 0.0 | 0.00 | 0.0 | 0.00 | | 8:00 AM–5:05 PM: Fair-weather Cu hum/Cu fra with increasing high clouds (Cs fib, Ci ve/spi/fib in, Cc); sky generally few to scattered. 7:22–8:20 PM: Cloud cover increased to broken as Sc str/Sc flo developed beneath persistent cirriform clouds and Cc un. |
| 2026-06-15 | 8:00 AM | T | 0.0 | 0.00 | 0.0 | 0.00 | | 08:17–10:56 MDT: Persistent overcast stratus with a brief mist/fog-like precipitation event around 09:38–10:36 MDT. By 11:25 MDT the deck evolved into multilayer stratus/stratocumulus, with the first breaks appearing around 13:50 MDT and sustained clearing beginning by 15:47 MDT. Scattered fair-weather cumulus developed after 17:30 MDT, with lenticular altocumulus observed around 19:04–19:18 MDT before scattered stratocumulus persisted into sunset. |
| 2026-06-14 | 8:00 AM | 0.00 | 0.0 | 0.00 | 0.0 | 0.00 | | 6/13: 8:47–9:46 AM clear skies. 12:22–12:52 PM few fair-weather cumulus (Cu hum/Cu fra). 2:12 PM broken stratocumulus developed with reinforcing cold front. 3:50–7:28 PM scattered stratocumulus/altocumulus. 7:42–8:27 PM broken stratocumulus with undulatus and lenticularis wave clouds. 6/14 AM: overcast/stratus deck overhead. Noticeably colder temperatures progressed over the day. |
| 2026-06-13 | 8:00 AM | 0.00 | 0.0 | 0.00 | 0.0 | 0.00 | | 0807–1257 MDT: Clear skies with no clouds observed. 1650–2016 MDT: Few fair-weather cumulus humilis developed, with some cumulus fractus by 2016 MDT. No precipitation or lightning; |
| 2026-06-12 | 8:00 AM | 0.00 | 0.0 | 0.00 | 0.0 | 0.00 | | 07:56–15:49 MDT: Clear skies with no clouds observed. 18:55 MDT: Few Ci vertebratus appeared, along with a few Cu fractus. 19:16 MDT: Few Ci spissatus observed. |
| 2026-06-11 | 8:00 AM | 0.00 | 0.0 | 0.00 | 0.0 | 0.00 | | 0800 MDT: Fair-weather cumulus under clear skies. 1140–1650 MDT: Few Cu hum/Cu fra/Cu med dominated with dry conditions. 1900 MDT: Scattered Sc flo and Cu fra developed. 1955–2000 MDT: Broken Sc str op with virga observed overhead, but no precipitation reached the ground. |
| 2026-06-10 | 8:00 AM | T | 0.0 | 0.00 | 0.0 | 0.00 | | 9:00–11:00 AM: Persistent overcast Sc (duplicatus ? stratiformis/translucidus). 12:40 PM: Brief break to scattered Sc floccus with As. 3:55–4:00 PM: Light rain with Sc/St fractus/As, followed by broken Cu humilis/mediocris. 7:50–8:30 PM: Broken Sc with virga, ending as Sc stratiformis opacus. |
| 2026-06-09 | 8:00 AM | 0.00 | 0.0 | 0.00 | 0.0 | 0.00 | | 9:04–11:07 AM: Overcast stratocumulus (duplicatus ? stratiformis/translucidus). 12:41 PM: Cloud deck became scattered with stratocumulus floccus and altostratus. 3:54–4:03 PM: Brief light rain with stratocumulus, stratus fractus, and altostratus, followed by developing cumulus as skies broke. 7:31–8:30 PM: Broken altostratus/stratocumulus persisted into the evening, including virga observed at 7:53 PM. |
| 2026-06-08 | 8:00 AM | 0.00 | 0.0 | 0.00 | 0.0 | 0.00 | | 0713 MDT: Clear skies. 0741–1243 MDT: Increasing altocumulus and layered mid/high clouds, including radiatus and lenticular forms. 1302–1505 MDT: Scattered cumulus developed beneath cirrus/cirrostratus, becoming broken stratocumulus by mid-afternoon. 1709–1910 MDT: Stratocumulus with virga observed, but no precipitation reached the surface |
| 2026-06-07 | 8:00 AM | T | 0.0 | 0.00 | 0.0 | 0.00 | | 0745 MDT: Clear skies. 0910–0930 MDT: Few cirrus (including spissatus/intortus), fair-weather cumulus. 0940–1630 MDT: Few to scattered Cu humilis/mediocris/fractus with brief congestus development and an isolated Cb noted at 1633 MDT. 1945–2000 MDT: Broken Sc/Ac with virga as distant lightning and thunder approached. 2005–2110 MDT: Mostly gusty showers with brief ground-wetting rain, gusts of 66 mph. The past 24-hours have had very high evaporative demand. |
| 2026-06-06 | 7:46 AM | 0.00 | 0.0 | 0.00 | 0.0 | 0.00 | | 0805–1014 MDT: Ci/Cs evolved to Ci intortus and spissatus. 1207–1847 MDT: Sc floccus and Cu fractus/mediocris/humilis dominated with brief Ac floccus late afternoon. 1947 MDT: isolated distant Cb observed |
| 2026-06-05 | 8:00 AM | T | 0.0 | 0.00 | 0.0 | 0.00 | | 0945–1010 MDT: Few Cc/Cc str and Cu fra. By 1245–1500 MDT, Sc flo/str, Ac, and Cu med increased to broken cover with frequent virga observed aloft. Broken Sc remained dominant through the evening, including opacus and castellanus forms. No lightning or precipitation reached the site despite nearby showers; rainbows observed at 1958–2000 MDT, including a double rainbow. |
| 2026-06-04 | 8:00 AM | T | 0.0 | 0.00 | 0.0 | 0.00 | | 7:49–11:57 AM: Broken cirrostratus (Cs neb, Cs fib) and cirrus (Ci spi) dominated, with Ac flo appearing by 10:20 AM. Around noon, small Cu fra developed beneath the high cloud shield. 1:34–5:03 PM: Transition to Sc flo, Sc str op du, St fra, and Cu med; brief rain/virga observed aloft near 2–5 PM but surface remained dry. 6:54–7:42 PM: Broken stratocumulus persisted with additional virga. |
| 2026-06-03 | 8:00 AM | 0.00 | 0.0 | 0.00 | 0.0 | 0.00 | | T-storms have been forecast since Monday (6/1), but we haven’t seen measurable rainfall.
7:48 AM: Overcast Sc str deck. By 8:15–9:55 AM, skies transitioned to scattered Cu fra/hum, St fra, Ac flo, and Ci ve. Around 12:15–1:20 PM, scattered fair-weather cumulus were present with a brief Cb observation at 1:21 PM, but no lightning or precipitation occurred. Cloud cover increased during the afternoon, becoming broken to overcast Sc str op by 2:00–4:00 PM, including virga at 4:09 PM. By 4:45 PM, clouds transitioned to Ac and Cs, ending with scattered Ac and Ci around 7:00 PM. |
| 2026-06-02 | 8:00 AM | T | 0.0 | 0.00 | 0.0 | 0.00 | | I was tracking the radar when the cell came through Cheyenne. It effectively missed us. We got some sun showers/sprinkles, but that was it. Looks like all the hail went along a NE transect.
6/1/26: Morning featured mainly Sc stratiformis/opacus with occasional Ac lacunosus (~0750–0800 MDT). Transition to scattered Cu hum/med occurred by ~1100–1230 MDT, with more vigorous convection developing during the afternoon. Isolated Cb observed around 1540 and 1730 MDT
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| 2026-06-01 | 8:00 AM | 0.00 | 0.0 | 0.00 | 0.0 | 0.00 | | 0826 MDT: Apparently cloudless skies. 0924–1220 MDT: Few Cu fractus, Cu humilis, and occasional Sc floccus developed. 1524–1828 MDT: Scattered fair-weather Cu humilis and Sc floccus. Around 2006 MDT, observed Sc lenticularis (low confidence) along with additional Sc and Cu humilis. By 2035–2036 MDT, few Sc floccus and Sc stratiformis remained |
| 2026-05-31 | 8:00 AM | 0.03 | 0.0 | 0.00 | 0.0 | 0.00 | | 08:00–09:30 MDT: Varied cloud field with Sc ra, Sc/Ac/Cc len, Ac flo, and increasing Sc coverage. 10:00–14:45 MDT: Broken Sc str/op and Cu med dominated, with occasional Sc cas and virga observed around 13:50 MDT. Rain began ~15:10 MDT with overcast Sc through the afternoon; nearby lightning observed at 15:43 MDT. Wet ground persisted into evening with broken Sc op remaining at 19:09 MDT. |
| 2026-05-30 | 8:00 AM | T | 0.0 | 0.00 | 0.0 | 0.00 | | orning featured a broken As tr deck around 0730–0950 MDT, with Cu med beginning to break through the midlevel cloud shield by late morning (~1135 MDT), signaling increasing boundary-layer instability beneath the moist layer aloft. Midday cloud diversity included Ac str/un, Sc flo, Cu hum/med/fra, and a sustained pileus cloud observation beginning around 1239 MDT. Pronounced cloud iridescence was observed around 1140–1145 MDT (initially mistaken as a rainbow). Overcast Sc str developed by ~1540 MDT with distant thunder and a period of rain from roughly 1544–1604 MDT. Conditions improved later with broken Sc/Ac and evening virga observed around 2003 MDT |
| 2026-05-29 | 8:00 AM | 0.00 | 0.0 | 0.00 | 0.0 | 0.00 | | Overcast Sc stratiformis opacus duplicatus at 07:14 gradually thinned through the morning, transitioning to Sc floccus and Cu humilis by 12:19. Cloud cover decreased from overcast to scattered/few through the afternoon, with fair-weather cumulus and stratocumulus dominating (13:57–18:19). Additional high clouds arrived in the evening, including Ci intortus, As, and Ac stratiformis translucidus around 18:20–19:20. Cloud cover increased again to broken stratocumulus by 22:17. |
| 2026-05-28 | 8:00 AM | 0.00 | 0.0 | 0.00 | 0.0 | 0.00 | | 0727–1053 MDT: Excellent example of widespread altostratus (As un/tr/tr du) producing a persistent overcast through the morning hours. Midday transitioned to stratiform stratocumulus duplicatus (Sc str du) with virga observed around 1251 MDT but no precipitation reaching the ground. Ceilings remained overcast through late afternoon, then gradually became broken after 1814 MDT with Sc flo/cas and some Ac by 1959 MDT. |
| 2026-05-27 | 8:00 AM | 0.00 | 0.0 | 0.00 | 0.0 | 0.00 | | 07:38–10:40 — Predominantly altostratus translucidus/duplicatus (As tr du) with overcast to broken skies. 11:02–12:22 — Transition to mixed cloud field with Cu fra, Cu hum, Cu med, and brief Cs neb while conditions remained dry. 15:52–17:32 — Afternoon cumulus growth continued (mainly Cu med with one Cu con observation at 17:32), but no lightning or precipitation developed. 18:33–20:02 — Evening featured mixed Sc flo/op/du, As tr du, Ac str, and isolated high clouds (Ci spi); skies stayed dry throughout. Good example of a As deck this AM. |
| 2026-05-26 | 8:00 AM | 0.00 | 0.0 | 0.00 | 0.0 | 0.00 | | 0715–0739 MDT: Few high clouds (Ci fib, Cs fib) early. By late morning into afternoon (1047–1745 MDT), scattered to broken Cu hum/med/con and Sc flo developed with some Ac/As layers aloft. Cu congestus observed intermittently around 1129–1542 MDT, but no lightning or precipitation occurred and surface conditions remained dry. Evening observations (1800–1931 MDT) showed broken layered clouds including Sc flo du and As du tr. |
| 2026-05-25 | 7:25 AM | T | 0.0 | 0.00 | 0.0 | 0.00 | | Increasing mid- and high-level clouds in AM transitioning to scattered cumulus and stratocumulus by afternoon. Light precipitation around 13:22 MDT from passing cumulus. More sustained light precipitation occurred during the evening overcast stratocumulus period around 19:04 MDT. Virga common the afternoon and evening. Distant lightning visible around 18:15. |
| 2026-05-24 | 8:00 AM | 0.00 | 0.0 | 0.00 | 0.0 | 0.00 | | 07:20 — Ac len du observed early with lenticular mid-level clouds. By 10:51–12:37, scattered Cu hum/Cu med and occasional Sc flo and Sc cas developed as daytime heating increased. Virga noted beneath Cu med around 12:17 and again near 15:14, with one brief Cu con observation at 15:08, but no lightning or surface precipitation observed. Cloud cover peaked as broken cumulus around 15:52–15:53 before decreasing back to scattered/few Sc flo and small cumulus by 19:11–20:22. |
| 2026-05-23 | 8:00 AM | 0.00 | 0.0 | 0.00 | 0.0 | 0.00 | | 07:43–13:22: Mostly fair-weather conditions with scattered Cu hum/fra and intermittent high clouds (Ci fib, Ci fib in, Cs fib). 14:41–18:58: Mid/high cloud cover steadily increased from scattered to overcast with Cs fib, As, and notable Ac len du lenticular clouds observed by early evening. 20:01–20:44: Broken As op transitioned to Sc du op near sunset. |
| 2026-05-22 | 7:45 AM | 0.01 | 0.0 | 0.00 | 0.0 | 0.00 | | 8:14 AM–9:16 AM: Overcast St/As transitioned to scattered Cs fib. 11:20 AM–1:30 PM: Increasing Sc, Cu hum/med/con, and occasional St fra as convection developed. Rain first noted at 1:28 PM with isolated Cb observed at 1:55 PM and again at 5:29 PM. 4:01–5:15 PM: Mostly overcast Sc str du op and St fra with periods of rain. Evening remained mostly broken to overcast with lingering Sc str, Sc ra, and St fra through 8:01 PM. |
| 2026-05-21 | 8:00 AM | T | 0.0 | 0.00 | 0.0 | 0.00 | | 08:00–10:15 MDT: Persistent broken to overcast Sc stratiformis duplicatus/opacus deck over Cheyenne. Clouds thinned late morning into scattered Ac and Ac floccus (~11:30 MDT), followed by scattered afternoon convective clouds including Sc floccus, Cu fractus, Cu mediocris, and isolated Cu congestus by 17:00–19:00 MDT. Late-day high clouds included Ci fibratus and Ci spissatus, with a possible low-confidence Ac lenticularis near 19:40 MDT. Trace droplets in gauge would have been interpreted as residue from previous day’s rain except fog was visible this AM and Mist/Fog was reported at CYS between 3:20 - 7:15 MST. |
| 2026-05-20 | 8:00 AM | 0.07 | NA | NA | NA | NA | | 07:58–09:54 MDT: Transition from scattered Cu fractus and isolated Cu humilis to broken Sc stratiformis/Sc stratiformis opacus as low clouds expanded behind overnight precipitation. 11:22–12:16 MDT: Persistent broken low cloud deck with Sc stratiformis duplicatus/opacus and occasional St fractus indicating lingering low-level moisture. 12:53–16:06 MDT: Partial afternoon breakup with scattered shallow convection (Cu mediocris, Cu fractus, Sc floccus, isolated Sc castellanus). 17:39–19:48 MDT: Evening featured scattered Ac floccus, Sc duplicatus, and Sc undulatus with continued cool/moist low-level conditions. Precipitation seemed to have occurred overnight. |
| 2026-05-19 | 8:00 AM | 0.10 | T | NA | 0.0 | NA | | 07:48–13:44 MDT: Persistent Nimbostratus (Ns) with overcast skies and prolonged drizzle, mixed precipitation, snow, and flurries. Around 15:44 MDT the cloud field transitioned to layered Stratocumulus (Sc str op du), with partial breakup and patches of fractus stratus by ~18:00 MDT. Intermittent snow/flurries redeveloped 18:40–19:45 MDT beneath Sc str and occasional renewed Ns overcast. |
| 2026-05-18 | 8:00 AM | 0.76 | T | NA | T | NA | | Periods of rain and low overcast clouds occurred through the morning, with Nimbostratus observed around 06:41 MDT. Conditions briefly improved late morning into early afternoon with broken Stratocumulus, Altostratus translucidus, and scattered fair-weather cumulus between ~11:30–14:00 MDT. Stratocumulus opacus increased again by mid-afternoon (~14:00–16:30 MDT), including some virga near 16:27 MDT, before steady rain redeveloped by ~16:50 MDT and persisted into the evening.
mixed precipitation this AM. Short observation record but this is the most precip recorded at WY-LM-277.
8:44 AM added 0.05 in of precip that was in ice slush in funnel. |
| 2026-05-17 | 8:00 AM | 0.15 | 0.0 | 0.00 | 0.0 | 0.00 | | BKN Sc stratiformis duplicatus opacus and virga during the early morning hours (06:58–07:12 MST). A very light morning precipitation event around 10:46 MST produced only a few drops/sprinkles, mainly noticeable on vehicle windshields, while a second light precipitation period occurred during the more active 15:00–16:30 MST window with widespread Sc stratiformis opacus + virga, St fractus, distant thunder at 15:13 MST, brief Cu congestus, and one Cb observation at 16:28 MST; rainfall remained light with only scattered drops reaching the surface. Rain intensified substantially during the evening, with heavy rainfall by 21:48 MST that ended after 10-15 minutes. Overnight into 17 May, precipitation continued with wet surfaces observed at 05:59–06:24 MST. By 06:41 MST on 17 May, overcast Ns/Sc was present with ongoing rain before conditions transitioned back to broken Sc stratiformis decks by 07:18–07:51 MST as precipitation tapered. |
| 2026-05-16 | 8:00 AM | 0.00 | 0.0 | 0.00 | 0.0 | 0.00 | | air-weather clouds dominated through the day on 5/15. Early morning (08:24–11:35 MDT) featured cirrocumulus and repeated altocumulus lenticularis/duplicatus formations. By mid-afternoon (14:00–17:40 MDT), scattered Cu humilis/mediocris and Sc floccus developed beneath persistent Ac/Cc lenticular clouds. Virga was observed around 17:36 MDT and again near 20:05 MDT, but no precipitation, lightning, or deep convection occurred. Cloud cover increased from few to broken by evening with Sc stratiformis becoming more common after 18:38 MDT. |
| 2026-05-15 | 8:00 AM | 0.00 | 0.0 | 0.00 | 0.0 | 0.00 | | 07:49–09:58 MDT: Broken Sc stratiformis dominated, including opacus and later duplicatus/translucidus layers. 11:54 MDT: Broken As developed overhead. 13:53–17:50 MDT: Mostly few fair-weather Cu humilis/fra under dry conditions. 18:46–19:16 MDT: Increasing high clouds with Cc undulatus, Cc stratiformis, and some Ci floccus. 20:25–20:46 MDT: Isolated Cu mediocris and a few Sc castellanus observed near sunset. |
| 2026-05-14 | 8:00 AM | 0.00 | 0.0 | 0.00 | 0.0 | 0.00 | | 8:28–13:22 MDT: Mostly few to scattered Altocumulus floccus with increasing mid-level instability. Virga and scattered Cu fractus/mediocris developed by early afternoon under a dry boundary layer. 17:30–18:33 MDT: Broken Stratocumulus stratiformis/opacus/duplicatus with persistent virga became dominant. Brief nearby convection noted around 18:48 MDT with Cb and mammatus observed, though no lightning or precipitation occurred at the site. Conditions remained dry throughout the day, and no precipitation was detected, but visible virga throughout the afternoon and evening may have reached the ground at some point. The skies looked like rain in the afternoon/evening, but likely only ever produced virga. |
| 2026-05-13 | 8:00 AM | 0.00 | 0.0 | 0.00 | 0.0 | 0.00 | | Mostly fair-weather conditions on 5/12 with prolonged clear or mostly clear skies. Clear skies observed around 0920 MDT and again near 1150 MDT. Brief periods of FEW Ac and Cu humilis developed late morning (~1040–1125 MDT), with isolated Sc during mid-afternoon (~1445 MDT). Thin high clouds (Ci/Cs fib) increased modestly during the evening from ~1700–1900 MDT. |
| 2026-05-12 | 8:00 AM | 0.00 | 0.0 | 0.00 | 0.0 | 0.00 | | ntermittent high clouds throughout the day on 5/11, dominated by Ci/Cs from ~0710–1755 MDT with coverage increasing from FEW early morning to BROKEN by late morning. Mid/high cloud deck became more varied after ~1200 MDT with periods of Ac/As, including Ac undulatus around 1835–1900 MDT. Brief Cu humilis observed near 1800 MDT. |
| 2026-05-11 | 8:00 AM | 0.00 | 0.0 | 0.00 | 0.0 | 0.00 | | Cloudless/near-cloudless skies observed through 0840 MDT, followed by development of FEW–SCT Cu hum/fra by 0914–1114 MDT. Cloud cover increased to SCT–BKN Cu hum with occasional Cu med from about 1204–1422 MDT, then gradually decreased during the late afternoon. Intermittent high clouds (Cs fib/Ci fib) were present through much of the day. A few Sc flo clouds were observed late afternoon into evening (1626–1901 MDT). |
| 2026-05-10 | 7:00 AM | T | 0.0 | 0.00 | 0.0 | 0.00 | | 5/9/26: Fair weather with scattered Sc flo and high clouds early through mid-day. Moderate development of convective clouds was first noticed at 12:06 MST (SCT/BKN Cu med). Very clear Cu con was observed at 14:49 MST. Rain showers, gusty winds, and Cb observations between ~1604–1640 MDT. Scud was moving quickly near the surface (14:58 until at least 19:35 MST. Distant lightning was observed (15:37 MST) but no prolonged thunderstorm activity occurred. Skies became OVC with Sc str du op during the early evening before partial clearing near sunset. Cloudless skies this AM.
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| 2026-05-09 | 8:00 AM | 0.00 | 0.0 | 0.00 | 0.0 | 0.00 | | Scattered low and high clouds observed through the day on 5/8. Early morning featured St fra (06:51 MDT). Sc str and Sc len du observed by 08:15 MDT. Fair-weather Cu hum/fra developed late morning through afternoon with occasional Cu med, while high clouds included Ci fib, Ci spi in, Ci unc, Cs fib, and Cs un. Ac la observed at 14:03 MDT. Surface transitioned from wet from previous nights rain to dry by mid morning. |
| 2026-05-08 | 7:00 AM | 0.14 | 0.0 | 0.00 | T | T | | 5/7/26 07:12–08:21 — BKN As transitioning to Ac len/du, then lowering to Sc len/du over patchy snow.
09:24–11:59 — Predominantly Sc (str/du/flo) becoming SCT Ac (len/str/flo) late morning.
13:09–14:17 — SCT Cu (hum/med/fra) with intermittent Sc; virga observed at 14:17.
15:10–16:24 — BKN Sc (str/op) with Cu fractus mixed in.
17:07–17:54 — Rain develops; BKN to OVC Sc/St (fra), brief Cb at 17:54.
18:14–19:50 — Return to BKN Sc with occasional Ac (un); sundog at 18:21; OVC Sc by 19:50; rain noted again by 22:15
One lonely patch of snow protected on East side of spruce tree. |
| 2026-05-07 | 8:00 AM | 0.00 | 0.0 | 0.00 | 0.7 | 0.19 | | 07:19–07:52 MDT: OVC Sc str/flo with continuous snow cover. 08:44–10:42 MDT: cloud deck thinned to SCT Ac and As tr, including Ac str pe un by mid-morning. 11:15–12:14 MDT: BRK Sc flo/Sc str pe transitioned to FEW Ac and Sc flo. 13:48–16:04 MDT: skies became clear with rapid improvement following storm departure. 17:02 MDT: surface transitioned from continuous snow cover to patchy snow cover. 17:03–18:47 MDT: only isolated fair-weather Cu hum, Sc flo, and brief Ac len ra observed.
Snow pack has become hard, from thaw-refreezing. I estimate a hardness of P. |
| 2026-05-06 | 8:00 AM | 0.45 | 4.4 | 0.51 | 5.9 | 0.78 | | Nimbostratus, OVC, and continuous cloud cover the entire day.
All snow measurements used snow board, and gauge funnel was removed.
Snowpack SWE reported at 12:26 PM |
| 2026-05-05 | 7:15 AM | 0.56 | 4.8 | 0.44 | 4.8 | 0.44 | | 5/4/26: 07:40–09:00 FEW Ci in/ve/fib, Ac flo/un/cas/la, As, intermittent virga (~08:40–08:42). 09:50–12:30 BKN As tr/du, Ac flo/str, Cu hum to med. ~14:00 Sc +virga increasing; becoming OVC (Sc) with first precip at 14:27 beginning with rain. Evening dominated by OVC/BKN Sc str. First continuous rain event began ~23:02–23:58 (wet surface). Continuous snow cover by 3 AM.
Young hawthorn tree flattened from weight of snow. Snow melting on roadways but accumulating on vegetation. |
| 2026-05-04 | 8:00 AM | 0.00 | 0.0 | 0.00 | 0.0 | 0.00 | | 07:08–08:51 Ac (flo, str) with frequent virga, SCT coverage; dry at surface.
09:03–10:12 Increasing cloud diversity: Sc, Cc flo un, Cs un, and Cu (hum ? med ? fra), still SCT and dry.
15:52–16:49 BRK conditions develop with Sc str du, As du, and Cu (hum/med/fra); layering increases.
18:06–18:43 Sc dominates (including op and du) with intermittent virga; sundog observed ~18:50.
Both snow boards out and gauge is prepared for snow catch. |
| 2026-05-03 | 8:00 AM | 0.00 | 0.0 | 0.00 | 0.0 | 0.00 | | 07:33–12:21 clear skies with no clouds observed (None), dry conditions.
14:15–17:19 development of FEW Cu hum/fra, briefly Cu med indicating modest vertical growth.
16:58–19:32 increasing high clouds (Ci/Cs fib) with continued FEW low cumulus.
19:30 Sc with virga observed aloft |
| 2026-05-02 | 8:00 AM | 0.00 | 0.0 | 0.00 | 0.0 | 0.00 | | 05/01/2026: 07:48–09:02 clear skies (no clouds observed). By 10:34–12:17, FEW Cu fra and Cu hum developed. Through 14:00–16:23, Cu persisted with occasional Cu med; coverage increased to SCT by mid-afternoon with some Sc flo. From 18:06–20:05, SCT mix of Cu (fra/hum/med) and Sc (flo/pe) continued. |
| 2026-05-01 | 8:00 AM | T | T | NA | NA | NA | | 07:11–07:23 OVC Ns with flurries
09:13–09:22 OVC St (neb/fra) with intermittent flurries
10:11 OVC Ns with light snow
10:47–11:57 Sc str, improving from OVC to BKN, precip ending
12:35–14:58 Predominantly OVC Sc str
16:32–17:46 BKN Sc (pe, cas, len) with emerging Cu (fra to hum)
18:09–18:36 BKN Cu (med) and Sc (flo pe), dry conditions |
| 2026-04-30 | 7:32 AM | T | T | T | NA | NA | | 07:24 — FEW Ac with patchy frost on surfaces.
09:40–10:15 — FEW Cu (hum/med/fra, brief congestus) developing under dry conditions.
10:50–12:30 — Sc increasing from SCT to BKN (stratiformis, brief castellanus).
13:00–18:25 — BKN Sc (stratiformis, occasional floccus) persists; dry overall, though a brief unknown precipitation report at 13:28 (possibly snow) |
| 2026-04-29 | 8:00 AM | T | 0.0 | 0.00 | 0.0 | 0.00 | | 07:10–07:41 AM OVC St (neb + fra) becoming BRK Sc (str op/pe) over patchy snow; lifting and breakup underway. 08:04–11:34 AM Sc (str to flo) with clearing from BRK to FEW; surface wet then drying. 12:34–2:45 PM FEW to SCT Cu (hum/med/fra) with occasional Sc (including cas) and brief virga; no sustained precip. 3:58–4:52 PM SCT Cu/Sc persists; one brief rain report near 4:52 PM. 6:38–7:00 PM SCT Sc/Cu with virga; isolated Cb near 6:58 PM, followed by minor Ac late |
| 2026-04-28 | 8:00 AM | 0.23 | T | NA | T | NA | | 08:10–09:00 — Sc flo/tr early, becoming BKN Sc str over patchy snow.
10:00–11:40 — SCT Sc flo with Cu med/fra developing; dry with modest mixing.
14:30–15:45 — Clouds thicken to OVC Sc str (du/op) with virga, quickly transitioning to Ns and steady rain.
16:00–18:30 — OVC Ns persists with rain; surfaces wet.
19:10–19:30 — Precip transitions rain ? mixed ? snow under Ns.
19:40 — OVC St neb remains as precip ends; patchy snow on ground.
snow/ice/water mixture in gauge |
| 2026-04-27 | 8:00 AM | 0.01 | T | T | 0.0 | 0.00 | | 7:36–10:53 AM: OVC St neb with fog early, gradually lifting but remaining overcast.
11:00 AM–12:50 PM: Transition to OVC Sc str (occasional du/un), indicating a rising, more structured low cloud deck.
1:24–2:25 PM: Continued OVC Sc (du/flo), thickening ahead of precipitation.
3:05–3:14 PM: Light rain begins with Ns/As du, Sc du, and St fra.
5:03–6:28 PM: Post-precip OVC Sc str/du/op with intermittent rain/virga; clouds begin to break late.
7:44 PM: SCT Sc |
| 2026-04-26 | 8:00 AM | 0.03 | 0.0 | 0.00 | 0.0 | 0.00 | | A brief early-morning clearing cloud cover progression. 7:31 AM OVC Sc un ? 7:49–8:14 AM BKN–SCT Sc str/flo (brief clearing). 9:34 AM OVC Sc str, then oscillating BKN/OVC through late morning (10:51–11:59 AM). 12:40–12:49 PM SCT–FEW Sc (midday thinning). Clouds thickened again later. 3:08–5:22 PM BKN Sc str ? Sc du (re-thickening). 5:57–6:02 PM OVC St neb / Sc du, transitioning to steady light rain by 6:33 PM; OVC St neb ? Ns by 7:09 PM with wet ground. Fog overnight. Some grain sized ice pellet/graupel in gauge. |
| 2026-04-25 | 8:00 AM | 0.00 | 0.0 | NA | NA | NA | | 7:28–8:10 AM: Clear skies.
9:17–10:23 AM: Few Cu humilis ? Cu fractus develop.
11:16 AM–1:58 PM: Transition to Sc floccus/stratiformis, SCT ? BKN.
3:08–4:46 PM: Mixed Sc and Cu (incl. Cu mediocris); brief Sc + virga noted.
6:29–6:59 PM: BKN Sc stratiformis persists. |
| 2026-04-24 | 8:00 AM | T | 0.0 | 0.00 | 0.0 | 0.00 | | 08:00 clear ? 08:02 few Cu fra; by 09:20–10:50 SCT?BKN Sc (flo/str, occasional du) with embedded Cu hum.
12:00–12:15 OVC Sc (str du op).
13:00–14:45 partial clearing to BKN/SCT with Sc, Ac (flo/ra), and Cu (hum?med).
15:25–17:15 SCT Cu/Sc with intermittent virga; brief Sc cas noted.
17:30 BKN Sc with light drizzle; ~17:35 As tr present.
18:40–19:40 BKN Sc (frequent du/cas) with occasional virga |
| 2026-04-23 | 8:00 AM | 0.00 | 0.0 | 0.00 | 0.0 | 0.00 | | 4/22: 07:40–10:08 MDT — BKN Ac/As (tr/du).
~11:56–11:57 — Transition to upper clouds: Ci (fib/flo) and Cs (neb).
13:46–16:50 — FEW Cu (hum/fra) with occasional Sc and patches of Cc/Ac; shallow convection, no precip.
18:23–19:10 — Clouds increase to BKN with Cu (med/fra) and layered As/Ac/Cs (incl. Ac len). Winds picked up at this time. |
| 2026-04-22 | 8:00 AM | 0.00 | 0.0 | 0.00 | 0.0 | 0.00 | | 7:21–9:11 AM: Thin cirrostratus (Cs fib ? Cs neb), decreasing from SCT to FEW.
11:15 AM–12:41 PM: Mostly clear with brief Cu hum; occasional thin Cs returns.
1:51–4:56 PM: Diurnal cumulus field develops (Cu hum/med/fra), increasing to BKN; Sc flo/str emerges by mid–late afternoon.
6:46 PM: Mixed Sc flo, Ac un, and residual Cu med at SCT coverage. |
| 2026-04-21 | 8:00 AM | 0.00 | 0.0 | 0.00 | 0.0 | 0.00 | | 7:41–10:35 AM: BKN mid/high cloud deck dominated by As tr (occasional du) with embedded Ci (fib, flo, in) and Ac (str/flo).
12:35–2:00 PM: Transition to SCT Ac (flo/str) with brief Ac len noted around 2 PM.
5:06–6:28 PM: Clouds thinning to FEW, shifting to low Sc flo by evening. |
| 2026-04-20 | 8:00 AM | 0.00 | 0.0 | 0.00 | 0.0 | 0.00 | | 7:30–9:30 AM: FEW Ac (including len) with a brief clear period near 8:30 AM.
10:55 AM–1:10 PM: SCT Ac dominates (flo, len, la, str un), showing undulatus and varied mid-level structure; dry with minor Rx fire smoke noted around noon.
2:44–3:07 PM: Coverage decreases to FEW Ac/Sc (flo).
4:01–6:28 PM: Mostly clear with intermittent Cu fra and brief Sc |
| 2026-04-19 | 8:00 AM | 0.00 | 0.0 | 0.00 | 0.0 | 0.00 | | 06:45–08:29 — Clear skies (“None”), patchy snow on ground.
09:31–11:27 — FEW Cu hum developing, occasional Cu fra.
13:23–13:29 — Brief return to clear, then isolated Cu fra.
14:30–15:49 — FEW Cu hum / Cu fra, intermittent and shallow.
15:36–19:43 — Skies trending back to clear. |
| 2026-04-18 | 8:00 AM | 0.03 | T | NA | T | NA | | 07:52–08:56 — OVC St neb with light snow increasing to steady snowfall; drifting snow noted by ~08:15.
11:59–12:12 — Transition to Ns, continued OVC with persistent snow.
14:01 — As observed as precipitation shield begins to thin.
15:19–15:20 — Breakup to BRK Cu med / Cu hum / Cu fra, snowfall diminishing; patchy snow on ground.
16:22–19:34 — SCT–FEW Sc flo / Sc cas with lingering shallow convection |
| 2026-04-17 | 8:00 AM | T | T | NA | NA | NA | | 07:20–09:15 — BRK Sc str with Cs fib and Ac len overhead; layered mid/high clouds increased to As du with embedded Ci fib.
10:45–12:30 — Continued BRK skies with Ac len and Cs/Cc (incl. Cc str); brief Cu hum and Sc flo noted, no precip.
15:56 — OVC Sc str.
18:15–18:50 — Returned to BRK with As tr/un, Sc len, and Cu med. |
| 2026-04-16 | 8:00 AM | 0.00 | 0.0 | 0.00 | 0.0 | 0.00 | | 07:48 — Sc observed under otherwise clear skies.
09:56–11:48 — Transition to Cu hum and Cu fra, remaining shallow with mostly clear to few coverage.
12:37–15:49 — Cu field expands to scattered with brief Cu med; some Sc flo develops, no vertical growth beyond fair-weather cumulus.
16:53 — High clouds increase with Ci fib un.
17:00–17:44 — Cu hum/fra persist with scattered coverage.
17:57–18:45 — Ac len (du/ra) and Ci fib un develop, indicating wave clouds aloft. |
| 2026-04-15 | 7:46 AM | T | 0.0 | 0.00 | 0.0 | 0.00 | | 06:57–07:29 — BRK St ? Sc +virga; wet surface early.
11:11–14:42 — Sc str, becoming OVC by midday.
17:24 — OVC St neb with light rain; surface wet.
18:36–21:42 — BRK St/Sc, including Sc un and later Sc flo; drying toward evening with some lingering surface moisture after ~21:30 |
| 2026-04-14 | 7:02 AM | 0.01 | 0.0 | 0.00 | 0.0 | 0.00 | | 07:34–08:10 — Broken to scattered high clouds (Cc len, Cc neb, Cc len un) with developing scattered Cu hum/fra; dry conditions.
09:11–10:03 — Transition to mixed layers: few–scattered Cu (hum/med/fra), Sc flo, and thin Cs (fib/un); still dry.
11:10–12:43 — Decreasing cloud cover to few, dominated by Cu and Sc with lingering thin high clouds.
15:40–17:48 — Increasing coverage to scattered then broken Sc flo with Cu fra; virga observed ~17:36 but no surface precipitation.
19:21 — Broken Sc persists into evening
Woke up to wet surface |
| 2026-04-13 | 8:00 AM | 0.00 | 0.0 | 0.00 | 0.0 | 0.00 | | 07:23 – Cc len with scattered high clouds.
08:39 – Transition to Ci fib and Cs fib (few), thinning cirriform layer.
10:45–13:20 – Broken multi-layer deck: Ac flo, Sc flo, As (tr/du), and Cu (hum/med/fra).
15:26 – Continued broken Cu hum and Sc flo with well-mixed boundary layer.
17:03 – Sc str with virga; precipitation evaporating before reaching surface.
19:29 – Sc (including undulatus) persists with additional virga |
| 2026-04-12 | 8:00 AM | T | 0.0 | 0.00 | 0.0 | 0.00 | | 7:30–9:30 AM: Broken Sc/St (stratiformis/nebulosus, occasional lenticularis) with As (du) developing overhead.
10:00–12:30 PM: Increasing cloud diversity—Cu hum/med/fra beneath Ac/As/Cs, with some high Ci fib; still mostly broken skies.
1:30–2:30 PM: Partial clearing to scattered Cu and Sc flo, followed by renewed vertical development (Cu con, Sc cas) and first virga observed.
4:00–5:30 PM: Transition to overcast Sc str (op) with widespread virga, then light drizzle and brief rain (~5:00–5:40 PM); no lightning observed.
6:24–7:27 PM: Return to broken Sc flo/cas with drying conditions |
| 2026-04-11 | 8:00 AM | T | 0.0 | 0.00 | 0.0 | 0.00 | | 7:54 AM – OVC St neb.
9:40–9:45 AM – SCT Ci fib and Sc flo.
12:23 PM – BRK Cs fib / Cc.
2:30–3:10 PM – BRK As tr, Ac flo, Sc str with virga.
4:30–5:30 PM – OVC to BRK Sc str, intermittent virga.
~5:50 PM – OVC As tr du / Sc str with brief drizzle/rain; no lightning.
7:41 PM – BRK Sc str; no deep convection observed. |
| 2026-04-10 | 8:00 AM | 0.00 | 0.0 | 0.00 | 0.0 | 0.00 | | 07:56–09:24 — High clouds dominate early with Cs fib ? Ci spi, thin cirriform deck, FEW–SCT coverage.
10:40–11:45 — Transition to mixed layers: Cu hum/med/fra with Cc flo/un, Ac flo, As du, coverage increasing to BRK.
13:47–14:23 — Low/mid clouds take over: Sc flo/med/cas with Cu con, BRK skies.
15:57–16:00 — Continued BRK Cu med/fra, St fra, Sc flo/str with virga observed; surface remains dry.
17:46 — Brief OVC Sc str deck.
17:59–18:24 — Partial clearing to SCT Sc with Ci spi/in aloft.
Another day that feels like trace precip should be reported but I don’t have any confirmation. |
| 2026-04-09 | 8:00 AM | 0.00 | 0.0 | 0.00 | 0.0 | 0.00 | | 7:38–10:15 — Few to scattered high clouds (Ci spi, in, flo, fib) dominated, gradually increasing coverage.
~11:00–12:30 — Transition to more complex layering with scattered mid-level and low clouds (As, Ac len/flo, Sc flo) and brief Cu fra/hum, indicating modest mixing.
14:25 — Brief thinning to few Cs neb before clouds increased again.
15:30–16:30 — Coverage increased to scattered?broken with Sc flo/str, As, and intermittent Cu med; isolated Ns noted (low confidence).
16:00–18:30 — Persistent broken mid/low clouds with frequent virga from Ac and Sc str; cirrus remained overhead.
Another day where I’d believe it if there were trace precipitation, but I personally did not observe it. |
| 2026-04-08 | 8:00 AM | 0.00 | 0.0 | 0.00 | 0.0 | 0.00 | | 07:48 – FEW Ci (spi/fib), Cs (neb), and As.
10:18–12:30 – SCT Cu (hum to med to fra).
14:01–17:19 – BKN Sc (str) with virga.
18:19–19:01 – SCT Sc (str/flo) and Cu (hum/fra/med), with some Cs (neb). |
| 2026-04-07 | 8:00 AM | 0.00 | 0.0 | 0.00 | 0.0 | 0.00 | | 07:43–10:15 MST: High stratiform clouds transitioned to more extensive high cloud cover.
13:29–14:30: High clouds became more structured with some cumuliform elements.
14:29–16:48: Introduction of mid-level cumuliform clouds alongside lingering high clouds; first virga observed by ~16:48.
18:17–19:25: Mid-level cumuliform clouds persisted with intermittent virga; high clouds remained overhead. |
| 2026-04-06 | 8:00 AM | 0.00 | 0.0 | 0.00 | 0.0 | 0.00 | | CLR through late morning (07:38–10:46 MST), transitioning to FEW Cu hum by ~11:47 MST (notable clear-to-few transition). Cu hum with occasional Cu fra persisted through the afternoon. High clouds (Cs fib) appeared around 17:01 MST, with Sc flo developing by ~19:31 MST. |
| 2026-04-05 | 8:00 AM | 0.00 | 0.0 | 0.00 | 0.0 | 0.00 | | Cu all day. FEW Cu fra at 7:26 AM with a brief clear period at 8:35 AM, increasing to FEW by ~10 AM and SCT Cu hum/fra from 12:30–3:45 PM, then decreasing to FEW by 5:40–6:20 PM and clearing by 7:41 PM. |
| 2026-04-04 | 8:00 AM | T | T | NA | 0.0 | NA | | 07:04–07:31 Sc ra with intermittent CLR, transitioning to Sc flo by 10:07. Late morning to early afternoon (11:11–12:39) featured Cu hum/med with frequent Cu fra and some Sc flo under FEW–SCT coverage. By 13:56 clouds consolidated into Sc str, becoming BKN then OVC by ~15:53 with St fra. Virga noted ~15:56–16:07 (Sc str + virga), followed by light flurries and Ns by ~17:16. Flurries stopped by 18:40. OVC persisted into evening with Sc str, and St fra. Clouds were beginning to break revealing midlevel stratiform (As du) by 18:56, but cover remained OVC. |
| 2026-04-03 | 8:00 AM | 0.00 | 0.0 | NA | NA | NA | | 08:09–09:54 Cu hum/fra under mostly clear skies. By 10:04–11:43 Sc developed, including Sc flo and Sc cas. Afternoon (13:29–14:56) featured a mix of Sc flo/cas and Cu med/hum with SCT coverage. Late afternoon (17:25–17:45) included Sc with virga and a brief Cu con. Evening (18:44–19:45) trended back to Sc flo with decreasing coverage. Conditions seemed like trace precipitation was likely, but it was not explicitly observed. |
| 2026-04-02 | 7:28 AM | 0.05 | 0.0 | 0.00 | 0.0 | 0.00 | | OVC As through the morning (07:21–11:40 MST), with trace AM precipitation observed. Became BKN As/Sc/Ac with some flo by early afternoon (~13:00–15:05 MST). Returned to OVC Sc (str/op) by ~16:40 MST, with precipitation beginning ~16:55 MST and continuing through 19:16–19:27 MST. |
| 2026-04-01 | 8:00 AM | 0.00 | 0.0 | 0.00 | 0.0 | 0.00 | | 07:50–09:08 MST: OVC low stratiform clouds. 10:25–11:40 MST: transitioned to BKN low stratiform clouds with some wave structure. 13:25–16:39 MST: mid-level stratiform clouds increased, briefly OVC around 14:48 MST. 18:11–19:02 MST: mix of low and mid-level stratiform clouds, remaining BKN–OVC.
16 consecutive rain-fast days. |
| 2026-03-31 | 8:00 AM | 0.00 | 0.0 | 0.00 | 0.0 | 0.00 | | Broken cloud cover through the day. Mid/high stratiform clouds (As/Cc) dominated early (08:00–10:00 MST), with low cumuliform clouds developing by late morning (~11:45 MST). A mixed mid- and low-level cloud field persisted through midday. Conditions transitioned to more stratocumulus by mid-afternoon (~14:45 MST), with intermittent virga observed. A brief congestus observation occurred around 17:53 MST. Sc with occasional castellanus elements continued into the evening (17:30–19:00 MST). |
| 2026-03-30 | 8:00 AM | 0.00 | 0.0 | 0.00 | 0.0 | 0.00 | | FEW high clouds early (~08:25–09:45 MST) transitioned to FEW fair-weather cumulus by late morning (~11:00 MST). Coverage briefly increased to SCT mid-afternoon (~17:15 MST), then decreased back to FEW by evening (~18:40 MST) with layered clouds present. |
| 2026-03-29 | 8:00 AM | 0.00 | 0.0 | 0.00 | 0.0 | 0.00 | | FEW high and middle stratiform clouds at 07:30–08:45 MST transitioned to SCT by ~09:30 MST with increasing high clouds. By 11:15–12:40 MST, cloud cover became BKN with layered high and middle stratiform clouds and emerging low stratiform. From ~13:00–14:00 MST, BKN conditions persisted with low cumuliform clouds developing beneath the deck. By 16:15 MST, low stratiform clouds produced virga, continuing through the evening. Extremely light precipitation may have reached the surface yesterday evening but was not measurable or clearly perceived; very high uncertainty. |
| 2026-03-28 | 8:00 AM | 0.00 | 0.0 | 0.00 | 0.0 | 0.00 | | |
| 2026-03-27 | 8:00 AM | 0.00 | 0.0 | 0.00 | 0.0 | 0.00 | | |
| 2026-03-26 | 8:00 AM | 0.00 | 0.0 | 0.00 | 0.0 | 0.00 | | |
| 2026-03-25 | 8:00 AM | 0.00 | 0.0 | NA | 0.0 | NA | | BRK Ac str throughout the AM. Brief Sc with virga observed around 10:00 MST. Conditions transitioned to SCT by late AM with Cu hum/Cufra beneath high clouds. Cloud cover increased to BRK by mid-to-late afternoon. |
| 2026-03-24 | 8:00 AM | 0.00 | 0.0 | 0.00 | 0.0 | 0.00 | | OVC St early (07:45–09:20 MST) lifted to OVC As tr by mid-morning. Clouds became BKN then briefly SCT Ac (str/un ? flo) around 11:20–11:45 MST. Afternoon featured BKN multi-layer clouds with Sc dominant and intermittent As, including occasional Sc cas/flo. By evening (17:30–19:15 MST), BKN Sc/As/St fra with some Ci fib overhead. |
| 2026-03-23 | 8:00 AM | 0.00 | 0.0 | 0.00 | 0.0 | 0.00 | | 7:37–07:56 overcast St neb early, transitioning by 8:20–10:05 to broken Sc str and then SCT mixed low/high clouds. Late morning through afternoon (11:35–15:30) featured FEW Cu hum/med/fra with intermittent high clouds (Ci/Cs). By ~17:30, clouds increased to SCT–BKN with layered As du, Ac, and Ci/Cs, including a sundog near 18:15. |
| 2026-03-22 | 8:00 AM | 0.00 | 0.0 | 0.00 | 0.0 | 0.00 | | 08:23–10:56 MST: Mostly high clouds (Ci, Cc) ranging from FEW to BRK through the morning. Around 12:21 MST, a brief thinning to FEW high clouds (Cs) occurred. 14:00–16:00 MST: More mixed cloud field with SCT high clouds and some Cu/Sc development, but overall limited coverage. 17:00–18:43 MST: Clouds increased again to BRK with multiple layers (high clouds plus developing mid-level As/Ac). Windy in the late afternoon. |
| 2026-03-21 | 8:00 AM | 0.00 | 0.0 | 0.00 | 0.0 | 0.00 | | Mostly clear early (07:47–08:49 MST) with only FEW high clouds present. FEW high clouds continued through late morning and mid-afternoon (11:51–15:22 MST), then increased to SCT by late afternoon (16:16–17:36), with Ci fib noted. High clouds were observed throughout the day. 89th percentile evaporation measurements. |
| 2026-03-20 | 8:00 AM | 0.00 | 0.0 | NA | 0.0 | NA | | FEW high clouds until 12:44 MST, at which time clear conditions were observed, which persisted for the remainder of the day. 94th percentile evaporation driven largely by warm temperatures and low relative humidity. |
| 2026-03-19 | 8:00 AM | 0.00 | 0.0 | 0.00 | 0.0 | 0.00 | | Mostly high clouds throughout the day, with cloud cover generally decreasing over time. Early morning (07:45–08:23) featured BRK mid/high clouds with a stratiform appearance. By late morning into early afternoon (10:04–13:22), clouds were primarily high-level and more cumuliform in structure, with coverage decreasing to SCT. Skies became mostly clear by mid-afternoon (~15:40), aside from a brief minimal low cloud report. Evening (18:23–19:02) had only FEW high clouds remaining. Most exciting part of the weather was the evaporation measurements. 75 degree temperatures, 8% relative humidity, and 45 mph gusts pushed evaporation measurements into 96th percentile. |
| 2026-03-18 | 8:00 AM | 0.00 | 0.0 | NA | 0.0 | NA | | Noticable mountain wave activity with the clouds throughout the day, with lenticularus and undulatus commonly observed. Low-to-middle stratiform with SCT/BRK cover dominated, but some high clouds were observed around 16:32 MST. Dry surface state with moderate breeze. |
| 2026-03-17 | 8:00 AM | 0.00 | 0.0 | NA | 0.0 | NA | | Overcast altocumulus was present in the morning, with continuous snow cover at that time. By mid-morning (09:04–11:32 MST), mid-level clouds with generally broken coverage were observed, including a notable example of altocumulus undulatus at 09:51 MST. Cloud cover gradually thickened through the day, and by 17:19 MST, overcast stratocumulus and stratus were observed.
Although continuous snow cover was observed in the AM, significant melting occurred over the day, and patchy snow was first noted at 14:01 MST, and snow was nearly absent by the evening hours. |
| 2026-03-16 | 8:00 AM | 0.02 | 0.3 | 0.02 | 0.4 | 0.05 | | Middle-to-high SCT clouds in the AM (8:38 - 9:43 MST). A long stretch fo FEW/SCT Sc Flo was observed between 9:58 - 13:41 MST. Some Cu hum and Cu fra, as well as some drifting snow, was also observed at this time. Flurries were first noted at 13:34 MST and BRK middle stratiform cloud cover was first observed at 13:41 MST. This general pattern of BRK/OVC As with flurries/snow continued until 19:21 MST. Continuous snow cover. Unsafe (icy) road conditions in the morning that thawed by mid-morning despite temperatures in the teens (solar-radiation melt). |
| 2026-03-15 | 8:00 AM | 0.04 | 1.1 | 0.16 | 1.1 | 0.16 | | First cloud observations of the day were SCT high-level clouds at 07:43–07:44 MST. Broken low- to mid-level clouds developed later, with BRK coverage observed from 08:58–10:25 MST. A few Cu hum were noted around 13:42 MST, while Sc str was common for much of the day. By 17:54 MST, cloud cover approached OVC and some St fra was observed beneath the lower cloud deck. Lenticular clouds were commonly observed throughout the day; a few undulatus formations were reported in the morning, and radiatus structure was observed around 18:14–19:09 MST. Clear skies were reported at 22:08 MST, though confidence in nighttime observations was relatively low. Surface conditions remained dry throughout the day, although continuous snow cover is currently observed from a late evening snow event. Backyard sidewalk is icy, and I suspect some mixed precipitation last night. |
| 2026-03-14 | 8:00 AM | 0.00 | 0.0 | NA | 0.0 | NA | | Winds were lighter than forecast yesterday. Warm temperatures, low humidity, and still-breezy conditions produced evaporation observations in the 79th percentile. Skies were generally characterized by middle-to-high clouds with SCT cloud cover for much of the day. Stratocumulus with BRK cloud cover developed around 16:55 MST, preceded by some stratus fractus observed around 16:43 MST. Surface conditions remained dry throughout the day. |
| 2026-03-13 | 8:00 AM | 0.00 | 0.0 | NA | 0.0 | NA | | Low-to-middle SCT/BRK stratiform clouds were present during the morning (07:15–12:00 MST). Blowing dust began obscuring the sky around 11:29 MST and persisted until approximately 18:06 MST. Some high clouds (Ci fib) were observed late in the day (17:27–18:06 MST). However, the primary story yesterday was the wind: Cheyenne recorded a record-breaking 92 mph gust, producing widespread local impacts. I observed several failures of wooden fence panels in the neighborhood, with additional fence damage reported by a nearby friend. Large Douglas-fir trees were uprooted at a golf course and at a residence near Storey–Yellowstone, and the McDonald’s sign sustained major damage. My own fence experienced only minor cosmetic damage. Blowing dust became significant enough that the NWS issued both a Blowing Dust Advisory and a Dust Storm Warning. The extreme winds also greatly influenced my backyard evaporation instrumentation: the daily water loss from my jar atmometer was approximately three times larger than typical and produced the largest daily evaporation volume I have ever recorded with this instrument. |
| 2026-03-12 | 8:00 AM | 0.00 | 0.0 | NA | 0.0 | NA | | Mostly FEW/CLR cloud coverage with clouds at mixed heights. Some weak cumulus (Cu fra, Cu hum?) development between 12:12 - 13:14 MST. Some very good examples of Ci spi were observed between 15:40 - 16:12 MST. Mostly patchy snow cover throughout the day. Exceptionally high winds at observation time today. |
| 2026-03-11 | 8:00 AM | 0.01 | 0.4 | 0.04 | 0.4 | 0.04 | | Early AM (7:40-7:50 MST) were mid-to-high clouds with BRK /SCT coverage. A sudden (freezing?) fog event began around 8:43 MST. Fog thinned by 9:08 MST, transitioning to SCT low-to-mid cloud cover. Cumulus clouds (Cu fra/Cu hum) were observe between 11:09 - 11:55 MST with intermittent mid-level stratiform clouds observed concurrently. Cloud cover thickened to overcast Sc str by 18:55 MST and flurries were observed by 19:30 MST. Continuous snow cover was apparent by 22:56 MST but was otherwise scarce throughout the day, being limited to a few piles in shade. High winds began in the evening at approximately the same time as the snow event. |
| 2026-03-10 | 8:00 AM | 0.00 | 0.0 | 0.00 | 0.0 | 0.00 | | High-to-middle clouds dominated yesterday. High-level stratiform clouds and lenticular clouds were observed in the AM. Cloud cover was generally broken through late morning, becoming more scattered around 10:53 MST. Cu fractus were observed around 15:16 MST, followed later by Cu hum as cloud cover became more scattered by 16:26–17:39 MST. Cloud cover increased again toward evening, with Ac len present by 18:37–18:38 MST. Patchy snow remained on the ground. |
| 2026-03-09 | 8:00 AM | 0.00 | 0.0 | NA | 0.0 | NA | | Mid-to-high SCT stratiform clouds at 8:20 - 11:38 MST. Cloud cover reduced to FEW around noon (12:24 MST). Some lenticular clouds (Ac len ra) we observed at 17:12 MST.
High winds began at around 14:57 MST. Snow nearly completely melted off yesterday, with patchy snow-cover surface conditions dominating most of the day. |
| 2026-03-08 | 8:00 AM | 0.00 | 0.0 | NA | 0.2 | 0.18 | | Morning began with clear skies and no visible clouds at 7:21 - 10:35 MST and continuous snow surfaces. Ci first observed around 12:17 MST. By 15:33 MST SCT AC were observed, including Ac len. Cloud cover increased somewhat by 17:39 - 18:10 MST with SCT Ac, Sc, Ci, and Cs.
The snowpack this morning has undergone apparent freeze-refreeze cycling. A noticible crust this AM was observed that was firm enough to break my plastic ruler. Estimating a hardness of P on the hand hardness scale. |
| 2026-03-07 | 8:00 AM | 0.03 | 0.2 | 0.02 | 2.2 | 0.31 | | What I believe to be nimbostratus clouds persisted for most of the day yesterday, with steady snow transitioning to flurries by 15:54 MST. Snow ended sometime before 17:00 MST.
Only about 0.5 cm of new snow fell, which made SWE measurements challenging. Snowpack SWE was calculated as the average of two measurements. The first core produced a small amount of spilled water; although it likely did not affect the result, a second core was taken as a precaution.
Small sastrugi-like formations were present on the snow surface.
Edited report on 3/8/2026 since I misunderstood the SWE measurements. |
| 2026-03-06 | 8:00 AM | 0.11 | 5.2 | 0.42 | 5.2 | 0.42 | | There is a noticeable difference between snow caught in the gauge and that measured on the snowboard. The gauge is elevated along a fence, while the snowboard is somewhat sheltered from the west by a shed and from the south by a trampoline. Snow depth on the snowboard appears representative of surrounding conditions.
The morning began with mostly low-to-middle cumuliform clouds with FEW cover. Cloud cover increased beginning around 14:15 MST, with repeated virga observed. Overcast conditions developed by 16:05 MST. Very faint drizzle was observed at 17:01 MST (reported for completeness). Snow began at 22:25 MST and stopped by 23:59 MST. No accumulation was observed prior to midnight, and all measurable snow accumulation occurred after 23:59 MST.
Edited report 3/8/2026 because of misunderstanding re. SWE |
| 2026-03-05 | 8:00 AM | 0.00 | 0.0 | NA | 0.0 | NA | | A few high clouds in the evening (>16:36 MST), but otherwise generally cloud-free. Frost in the AM. |
| 2026-03-04 | 7:13 AM | 0.11 | 0.0 | NA | 0.0 | NA | | OVC and low stratiform most of the day. Rain at 7:14 MST and continued intermittently throughout the AM. Cloud cover briefly transitioned to BKN around 11:07 MST. Additional precipitation midday. Drizzle/Rain at 12:26-12:59 MST and mixed precipitation around 13:05 - 13:19 MST. Surface was generally wet all day. Frost at the time of reading. |
| 2026-03-03 | 7:54 AM | 0.32 | 0.0 | NA | 0.0 | NA | | Low BRK stratiform clouds early (07:15–08:00 MST), thinning to SCT/FEW by late morning (09:40–11:15 MST); BRK cover returned by 13:05 MST. Light rain began ~13:05 MST with St fra observed 14:30–16:30 MST. Showers again at 16:40 MST and 18:55–19:10 MST; rainbow at 17:42 MST. Distant lightning observed (no thunder heard) 19:39–21:08 MST. |
| 2026-03-02 | 8:00 AM | 0.00 | 0.0 | NA | 0.0 | NA | | Early morning (06:53–09:30) featured FEW to SCT low- and mid-level stratiform clouds with high clouds overhead. By 10:36 MST, cumuliform development was noted with Cu med under otherwise SCT mid/high cloud layers. Cloud cover increased through early afternoon, transitioning from SCT to BRK by 13:32 MST and becoming OVC by 14:35 MST, dominated by low/mid-level stratiform clouds. Virga was observed mid-afternoon (15:53–17:04 MST). A brief drizzle event occurred at 18:26 MST with a wet surface reported, which was not detected by the gauge. |
| 2026-03-01 | 7:30 AM | 0.00 | 0.0 | NA | 0.0 | NA | | FEW clouds from 7:56-10:49 MST. Smoke from Otto Road Fire noted at 11:07 and disappeared soon after 11:13 MST. High-level clouds noted around this time. SCT mid-to-high level clouds noted 12:35-3:51 MST from the DIA area. No snow cover and winds were moderate in comparison to past two days. |
| 2026-02-28 | 8:00 AM | 0.00 | 0.0 | NA | 0.0 | NA | | Mid-to-high clouds dominated, primarily Ac and Ci. FEW cloud cover early (06:49–07:57 MST), increasing to SCT by late morning (10:30–10:59 MST), then thinning back to FEW around midday (12:05–12:22 MST). High winds. Dry surface conditions. |
| 2026-02-27 | 8:00 AM | 0.00 | 0.0 | NA | 0.0 | NA | | Nearly cloudless sky. High winds present but had moderated compared to the day previous (as advertised from the NWS Forecast Discussion). Dry surface state. |
| 2026-02-26 | 8:00 AM | 0.00 | 0.0 | NA | 0.0 | NA | | Broken mid-to-high stratiform cloud cover (mainly As and Cs) was observed from 07:18–10:26 MST. Scattered cumuliform clouds (Cu and Sc) were noted beginning at 12:08 MST and persisted through 17:24 MST; a Cu med observation at 17:22 MST with low confidence. By 18:01 MST, only few Sc remained. Patchy snow was present during the morning observations and had melted by 17:22 MST, leaving dry surface conditions into the evening. High winds throughout the day with CYS reporting a 63 mph gust. |
| 2026-02-25 | 8:00 AM | 0.00 | 0.0 | NA | NA | NA | | SCT/BRK Middle stratiform clouds (possibly large lenticulars) dominated most of the day. Patchy snow cover. High winds. |
| 2026-02-24 | 8:00 AM | 0.00 | 0.0 | NA | NA | NA | | SCT/BRK high-to-middle stratiform clouds generally. Patchy snow. |
| 2026-02-23 | 8:00 AM | 0.00 | 0.0 | NA | NA | NA | | High-to-middle clouds over most of the day with SCT/BRK cover. Late afternoon was characterized by very clear skies. Patchy snow cover. Above-freezing temperatures resulted in more snowmelt. |
| 2026-02-22 | 8:00 AM | 0.00 | 0.0 | NA | NA | NA | | Clear skies in the AM with some Ac len and weak cumulus (Cu fra/Cu hum) observed starting at 10:45 MST. Increased cloud cover (SCT/BRK) beginning around 13:30 MST. Sc clouds with virga observed. Continuous snow cover, but temperatures reached above freezing, so some daytime melting was evident. Gauge was officially installed. |
| 2026-02-21 | 8:00 AM | NA | T | NA | NA | NA | | Midlevel stratiform (As tr) clouds dominated yesterday. Flurries began at 14:02 MST and ended around 16:43 MST. Very low evaporation day as measured from my gravimetric atmometer (https://harry-podschwit.shinyapps.io/ATMOMETER/). |
| 2026-02-20 | 8:00 AM | 0.00 | 0.0 | NA | 1.0 | NA | | Generally scattered cloud cover of mixed heights. Continuous snow cover. Snow depth is reduced from settling/solar radiation. |
| 2026-02-19 | 7:50 AM | NA | 2.6 | NA | 2.2 | NA | | Largely low-clouds with overcast/broken cover yesterday. Very brief flurries at 17:04 MST. Dry surfaces until snow started at 21:36 MST. Heavy snowfall rates 21:36 - 23:05 MST (approximately 2 in/hour). Unofficial SWE of 17:1 (non-standard equipment). Half-hourly time series of snow-depth measurements are available upon request. Reporting NA until official gauge arrives. Snowfall measurements taken using level, white, snowboard. Per CoCoRaHs protocol, 24-hour snowfall from overnight peak. Snowpack depth is AM measurement after settling. |
| 2026-02-18 | 8:00 AM | NA | 0.0 | NA | 0.0 | NA | | 2+ squalls with flurries around 8AM and 5PM. Windy. No persistent snow cover. Some surface wetting after AM squall. Reporting NAs until gauge is installed. Sc str with broken/overcast cloud cover dominated, with a few mid-day cloud cover breaks. |