| 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. |
| 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. |