Alert archive / Wyoming / Red Flag Warnings in 2025
Red Flag Warning 12, NWS Cheyenne, WY
NWS Cheyenne, WY issued this red flag warning at Jul 17, 2025, 2:31 AM MDT for Albany County, Carbon County, Wyoming. It took effect at Jul 17, 2025, 12:00 PM MDT. It was in force for 8 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Jul 17, 2025, 2:31 AM MDT (08:31 UTC)
- In effect from
- Jul 17, 2025, 12:00 PM MDT
- Expired
- Jul 17, 2025, 8:00 PM MDT
- In force
- 8 hr
- Issued by
- NWS Cheyenne, WY
Counties Albany County, WY, Carbon County, WY
The radar
The Cheyenne radar (KCYS), 140 km from the middle of the area, began a volume at 08:32 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
Grand Junction, CO (KGJT), launched 00:00Z, 8.5 hours before the alert went out and 337 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
- 17 J/kg
- Mixed-layer CIN
- -209 J/kg
- Mixed-layer LCL
- 3817 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- -38 m²/s²
- 0-3 km storm-relative helicity
- -42 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this red flag 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 red flag warning went out at Jul 16, 11:39 PM MDT, 2 hours 52 minutes earlier.
Area forecast discussion, Jul 16, 11:39 PM MDT, 2 hours 52 minutes before
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</html>Hazardous weather outlook, Jul 16, 1:02 PM MDT, 13 hours 29 minutes before
Hazardous Weather Outlook National Weather Service Cheyenne WY Issued by National Weather Service Rapid City SD 102 PM MDT Wed Jul 16 2025 NEZ002-003-019>021-054-055-095-096-WYZ101>119-171915- 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- 102 PM MDT Wed Jul 16 2025 This hazardous weather outlook is for portions of panhandle Nebraska...east central Wyoming...south central Wyoming and southeast Wyoming. .DAY ONE...THIS AFTERNOON AND TONIGHT - Scattered strong to severe thunderstorms are expected this afternoon and evening in southeast Wyoming and southwest Nebraska. Large hail is the primary threat, but all severe weather hazards are possible. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY - Warmer temperatures and isolated to scattered late day showers and thunderstorms will occur for Thursday through early next week. .Spotter information statement... Spotters are encouraged to report severe weather to the National Weather Service in Cheyenne.
In the hours before
Special weather statement, Jul 17, 2:15 AM MDT, 16 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 |
|---|---|---|---|---|
| Jul 16, 6:12 PM MDT | Special Weather Statement | CYS | Carbon | 33 min |
| Jul 16, 6:47 PM MDT | Special Weather Statement | CYS | Carbon | 43 min |
| Jul 16, 7:48 PM MDT | Special Weather Statement | CYS | 42 min | |
| Jul 17, 2:55 PM MDT | Special Weather Statement | CYS | Converse | 35 min |
Nearby
Red Flag Warnings in Wyoming, 2025Every red flag 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.