Alert archive / Wyoming / Red Flag Warnings in 2026
Red Flag Warning 37, NWS Cheyenne, WY
NWS Cheyenne, WY issued this red flag warning at Aug 10, 2026, 1:03 AM MDT for 6 counties in Wyoming. It took effect at Aug 10, 2026, 12:00 PM MDT. It was in force for 9 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
- Aug 10, 2026, 1:03 AM MDT (07:03 UTC)
- In effect from
- Aug 10, 2026, 12:00 PM MDT
- Expired
- Aug 10, 2026, 9:00 PM MDT
- In force
- 9 hr
- Issued by
- NWS Cheyenne, WY
Counties Albany County, WY, Carbon County, WY, Converse County, WY, Goshen County, WY, Niobrara County, WY, Platte County, WY
The radar
The Cheyenne radar (KCYS), 131 km from the middle of the area, began a volume at 07:06 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
N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 7.1 hours before the alert went out and 412 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
- 1260 J/kg
- Mixed-layer CIN
- -335 J/kg
- Mixed-layer LCL
- 2399 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 8 m²/s²
- 0-3 km storm-relative helicity
- 95 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -1.2
The office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 10, 1:51 PM MDT | Red Flag Warning | CYS | Albany, Carbon, Converse, Goshen, Laramie, Niobrara and 1 more | 31 hr |
| Aug 10, 3:05 PM MDT | Special Weather Statement | CYS | Carbon | 25 min |
| Aug 10, 4:00 PM MDT | Severe Thunderstorm Warning | CYS | Converse | 45 min |
| Aug 10, 4:37 PM MDT | Severe Thunderstorm Warning | CYS | Converse, Niobrara, Platte | 38 min |
| Aug 10, 5:34 PM MDT | Severe Thunderstorm Warning | CYS | Albany, Carbon | 41 min |
| Aug 9, 6:09 PM MDT | Special Weather Statement | CYS | Morrill | 36 min |
| Aug 9, 6:30 PM MDT | Special Weather Statement | CYS | Box Butte | 30 min |
| Aug 9, 6:33 PM MDT | Severe Thunderstorm Warning | CYS | Morrill | 42 min |
| Aug 9, 6:41 PM MDT | Severe Thunderstorm Warning | CYS | Morrill | 49 min |
| Aug 9, 6:47 PM MDT | Special Weather Statement | CYS | Cheyenne | 28 min |
| Aug 9, 7:14 PM MDT | Severe Thunderstorm Warning | CYS | Box Butte, Cheyenne, Kimball, Morrill | 61 min |
| Aug 9, 8:14 PM MDT | Special Weather Statement | CYS | Cheyenne | 31 min |
| Aug 10, 3:53 PM MDT | Special Weather Statement | CYS | Morrill | 37 min |
| Aug 10, 4:02 PM MDT | Severe Thunderstorm Warning | CYS | Morrill | 21 min |
| Aug 10, 5:06 PM MDT | Severe Thunderstorm Warning | CYS | Cheyenne | 39 min |
Nearby
Red Flag Warnings in Wyoming, 2026Every red flag warning in 2026
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.