NWS Cheyenne WYFW.W 0039September 2, 2026
Red Flag Warning: Niobrara/Lower Elevations of Converse/Thunder Basin National Grassland and Middle North Platte River Basin/Niobrara and Converse High Plains, WY
The National Weather Service office in Cheyenne issued a red flag warning for Niobrara/Lower Elevations of Converse/Thunder Basin National Grassland and Middle North Platte River Basin/Niobrara and Converse High Plains in Wyoming, which was in force until 7:00 p.m. local time on September 3. It was the 39th red flag warning the NWS office in Cheyenne issued in 2026. Wyoming had 16 red flag warnings in September 2026, against 16 in an average September of 2008-2025 (Wyoming's red flag warnings by year).
ExpiredWarning
In force for 7 hours; it has expired. The agency may have replaced it with a new notice.
The notice
- Issued by
- National Weather Service, Cheyenne WY
- Area
- Niobrara/Lower Elevations of Converse/Thunder Basin National Grassland and Middle North Platte River Basin/Niobrara and Converse High Plains
- State
- Wyoming
- Level
- Warning
- Issued
- 12:09 p.m. MDT, September 2, 2026
- In force from
- 12:00 p.m. MDT, September 3, 2026
- Expires
- 7:00 p.m. MDT, September 3, 2026
- CAP severity, certainty, urgency
- Severe, Likely, Expected
- VTEC event
- KCYS FW.W 0039
- Official source
- National Weather Service: the notice at its source
Red Flag Warnings in Wyoming since 2008Every warning type in Wyoming
Source: National Weather Service: the notice at its source. AreaZine rebuilds this page from the agency's record; the agency's page is the one to act on. A U.S. Government work, in the public domain.
The notice as issued
The National Weather Service in Cheyenne has issued a Red Flag Warning, which is in effect from noon to 7 PM MDT Thursday. * AFFECTED AREA...Fire weather zone 417.Fire weather zone 418. * WIND...Southwest at 15 to 25 mph with gusts up to 35 mph. * HUMIDITY...Between 10 and 15 percent. * IMPACTS...any fires that develop will likely spread rapidly. Outdoor burning is not recommended.
What the agency told people to do
A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior.
Source: National Weather Service: the notice at its source. The text is the agency's, unedited. A U.S. Government work, in the public domain.