A strong cold front moved across the state of Wyoming the afternoon of March 31st. This front not only produced severe thunderstorms across the eastern plains, but a few high impact snow squalls along Interstate 80 over Carbon County.
Every event with a place to put it; 1 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS CYS wrote it up.
A strong cold front moved across the state of Wyoming the afternoon of March 31st. This front not only produced severe thunderstorms across the eastern plains, but a few high impact snow squalls along Interstate 80 over Carbon County.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Cheyenne, WY wrote its last area forecast discussion before the first event at Mar 31, 3:06 PM MST, 59 minutes earlier.
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</html>Hazardous Weather Outlook National Weather Service Cheyenne WY 408 PM MDT Mon Mar 31 2025 NEZ002-003-019>021-054-055-095-096-WYZ101>119-012215- Dawes County-Box Butte County-Scotts Bluff County-Banner County- Morrill County-Kimball County-Cheyenne County- Northern Sioux County-Southern Sioux County- Converse County Lower Elevations-Niobrara County- North Laramie Range-Ferris/Seminoe/Shirley Mountains- Shirley Basin-Central Laramie Range and Southwest Platte County- East Platte County-Goshen County-Central Carbon County- North Snowy Range Foothills-Southwest Carbon County- Sierra Madre Range-Upper North Platte River Basin-Snowy Range- Laramie Valley-South Laramie Range-South Laramie Range Foothills- Central Laramie County-East Laramie County- 408 PM MDT Mon Mar 31 2025 This hazardous weather outlook is for portions of panhandle Nebraska...east central Wyoming...south central Wyoming and southeast Wyoming. .DAY ONE...TONIGHT - Showers with a few thunderstorms will move over the High Plains through this evening and may produce isolated small, soft hail. - Rain showers will change to snow by early evening in Carbon county, with multiple rounds of snow showers expected through Tuesday morning. Some snow showers will be locally intense, producing low visibility and slick conditions along I-80. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY - Moisture wrapping back into the area may produce slushy snow accumulations along the US-20 corridor Tuesday evening through Wednesday morning, but confidence is fairly low. - Strong to locally high winds return to the area Tuesday and Wednesday. - Cold end to the week and start to the weekend, with a warming trend expected to start next week. .Spotter information statement... Spotter activation will not be needed.
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</html>Special Weather Statement National Weather Service Cheyenne WY 448 PM MDT Mon Mar 31 2025 WYZ107-108-312315- East Platte County WY-Goshen County WY- 448 PM MDT Mon Mar 31 2025 ...A STRONG THUNDERSTORM WILL IMPACT NORTHWESTERN GOSHEN AND EAST CENTRAL PLATTE COUNTIES THROUGH 515 PM MDT... At 448 PM MDT, Doppler radar was tracking a strong thunderstorm over Hartville, or 24 miles northeast of Wheatland, moving east at 35 mph. HAZARD...Half inch hail. SOURCE...Radar indicated. IMPACT...Minor hail damage to vegetation is possible. Locations impacted include... Register Cliff State Historic Site, Jay Em, Guernsey, Oregon Trail Ruts State Historic Site, Guernsey State Park, and Hartville. PRECAUTIONARY/PREPAREDNESS ACTIONS... If outdoors, consider seeking shelter inside a building. && LAT...LON 4223 10477 4237 10483 4255 10441 4233 10427 TIME...MOT...LOC 2248Z 247DEG 32KT 4234 10469 MAX HAIL SIZE...0.50 IN MAX WIND GUST...<30 MPH Mose
The national radar mosaic for the moment the first event began.
1 winter weather. Local standard time, as filed.
Rawlins Airport reported a snow squall with visibilities between one quarter mile and one half mile for nearly a half an hour. Wind gusts between 40 to 45 mph were also reported.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Wyoming in 2025Every state in 2025This day in weather historyWarnings in Wyoming, March 2025
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-10-01. Each event’s entry at NCEI: 1244113.