NWS Riverton WYFW.W 0029October 4, 2026
Red Flag Warning: Sweetwater County/Rock Springs BLM/Flaming Gorge NRA, Natrona County/Casper BLM, Granite/Green/Ferris/Rattlesnake Mountains and 1 more, WY
The National Weather Service office in Riverton issued a red flag warning for Sweetwater County/Rock Springs BLM/Flaming Gorge NRA, Natrona County/Casper BLM, Granite/Green/Ferris/Rattlesnake Mountains and 1 more in Wyoming, which was in force until 6:00 p.m. local time on October 5. It was the 29th red flag warning the NWS office in Riverton issued in 2026. Wyoming had 2 red flag warnings in October 2026, against 6 in an average October of 2008-2025 (Wyoming's red flag warnings by year).
ExpiredWarning
In force for 6 hours; it has expired. The agency may have replaced it with a new notice.
The notice
- Issued by
- National Weather Service, Riverton WY
- Area
- Sweetwater County/Rock Springs BLM/Flaming Gorge NRA, Natrona County/Casper BLM, Granite/Green/Ferris/Rattlesnake Mountains and 1 more
- State
- Wyoming
- Level
- Warning
- Issued
- 11:31 a.m. MDT, October 4, 2026
- In force from
- 12:00 p.m. MDT, October 5, 2026
- Expires
- 6:00 p.m. MDT, October 5, 2026
- CAP severity, certainty, urgency
- Severe, Likely, Expected
- VTEC event
- KRIW FW.W 0029
- 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 Riverton has issued a Red Flag Warning, which is in effect from noon to 6 PM MDT Monday. the Fire Weather Watch is no longer in effect. * IMPACTS: Low Humidities...Unseasonably Warm Temperatures...and Strong Gusty Winds could cause erratic fire behavior. * AFFECTED AREA: In Central WY Fire Zones...280...289...300. In Southwest WY Fire Zone....279. * COUNTIES AFFECTED: In Central WY...Fremont...Natrona. In Southwest WY...Sweetwater. * WIND: West 10 to 15 mph with gusts of 30 to 35 mph. * HUMIDITY: As low as 10 percent. * TEMPERATURES: Highs in the low to mid 80s.
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.