Alert archive / Wyoming / Severe Thunderstorm Warnings in 2025
Severe Thunderstorm Warning 313, NWS Cheyenne, WY
NWS Cheyenne, WY issued this severe thunderstorm warning at Oct 15, 2025, 7:26 PM MDT for Platte County, Wyoming. It was in force for 49 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Oct 15, 2025, 7:26 PM MDT (01:26 UTC)
- Expired
- Oct 15, 2025, 8:15 PM MDT
- In force
- 49 min
- Issued by
- NWS Cheyenne, WY
- Area
- Storm-based polygon
- Hail
- 1.5 in
- Wind
- 60.0 mph
County Platte County, WY
The radar
The Cheyenne radar (KCYS), 110 km from the middle of the area, began a volume at 01:27 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Riverton, WY (KRIW), launched 00:00Z, 1.4 hours before the alert went out and 300 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 122 J/kg
- Mixed-layer CIN
- -8 J/kg
- Mixed-layer LCL
- 2010 m above ground
- 0-6 km bulk shear
- 46 kt
- 0-1 km storm-relative helicity
- 56 m²/s²
- 0-3 km storm-relative helicity
- 70 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.4
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, 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 this severe thunderstorm warning went out at Oct 15, 5:54 PM MDT, 1 hour 32 minutes earlier.
Area forecast discussion, Oct 15, 5:54 PM MDT, 1 hour 32 minutes before
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</html>Hazardous weather outlook, Oct 15, 4:24 PM MDT, 3 hours 2 minutes before
Hazardous Weather Outlook National Weather Service Cheyenne WY 424 PM MDT Wed Oct 15 2025 NEZ002-003-019>021-054-055-095-096-WYZ101>119-162230- 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- 424 PM MDT Wed Oct 15 2025 This hazardous weather outlook is for portions of panhandle Nebraska...east central Wyoming...south central Wyoming and southeast Wyoming. .DAY ONE...TONIGHT - Showers and thunderstorms across the region through tonight, with some stronger to possibly near severe, though the environment isn't quite as robust as expected. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY - Rain and general thunder expected on Thursday alongside increasing winds with high wind warnings possible Thursday into Friday. - A clipper system may bring another burst of strong winds on Saturday. .Spotter information statement... Spotter activation will not be needed.
In the hours before
Special weather statement, Oct 15, 6:31 PM MDT, 55 minutes before
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</html>The office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 15, 6:31 PM MDT | Special Weather Statement | CYS | Platte | 29 min |
| Oct 15, 6:43 PM MDT | Special Weather Statement | CYS | Albany | 32 min |
| Oct 15, 6:49 PM MDT | Severe Thunderstorm Warning | CYS | Albany, Laramie, Platte | 41 min |
| Oct 15, 7:04 PM MDT | Special Weather Statement | CYS | Niobrara | 41 min |
| Oct 15, 7:12 PM MDT | Special Weather Statement | CYS | Platte | 33 min |
| Oct 15, 7:22 PM MDT | Severe Thunderstorm Warning | CYS | Converse, Niobrara, Platte | 38 min |
| Oct 15, 7:31 PM MDT | Special Weather Statement | CYS | Albany | 29 min |
| Oct 15, 7:32 PM MDT | Severe Thunderstorm Warning | CYS | Albany, Converse, Platte | 43 min |
| Oct 15, 7:48 PM MDT | Severe Thunderstorm Warning | CYS | Converse, Niobrara, Platte | 57 min |
| Oct 15, 8:11 PM MDT | Special Weather Statement | CYS | Goshen | 49 min |
| Oct 15, 8:14 PM MDT | Severe Thunderstorm Warning | CYS | Converse, Niobrara, Platte | 46 min |
| Oct 15, 8:16 PM MDT | Special Weather Statement | CYS | Niobrara | 29 min |
| Oct 15, 8:26 PM MDT | Special Weather Statement | CYS | Laramie | 34 min |
| Oct 15, 8:30 PM MDT | Special Weather Statement | CYS | Platte | 45 min |
| Oct 15, 8:46 PM MDT | Special Weather Statement | CYS | Niobrara | 44 min |
| Oct 15, 8:56 PM MDT | Special Weather Statement | CYS | Albany | 34 min |
| Oct 16, 1:45 AM MDT | High Wind Warning | CYS | Albany, Carbon, Laramie, Platte | 52 hr |
| Oct 15, 8:32 PM MDT | Special Weather Statement | CYS | Scotts Bluff | 28 min |
Nearby
Severe Thunderstorm Warnings in Wyoming, 2025Every severe thunderstorm warning in 2025
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.