ALERTS SEVERE

Wyoming Weather & Safety Alerts

4 active alerts

Data source: National Weather Service (NWS)

Warnings

Watches

Advisories

Fire Weather

Red Flag Warning (WARNING) - expires September 10, 2026 at 9:00 AM EDT

Areas affected: Absaroka Mountains/North Shoshone NF; Owl Creek Mountains; East Wind River Mountains/South Shoshone NF

Red Flag Warning issued September 9 at 12:58PM MDT until September 10 at 9:00PM MDT by NWS Riverton WY

The National Weather Service in Riverton has issued a Red Flag Warning, which is in effect from noon to 9 PM MDT Thursday.

AFFECTED AREA: In Central WY Fire Zone....288. In North Central WY Fire Zone....287. In Northwest WY Fire Zone....286.

COUNTIES AFFECTED: In Central WY...Fremont. In North Central WY...Hot Springs...Park. In West Central WY...Sublette.

IMPACTS: Low Humidities and Strong Gusty Winds could cause erratic fire behavior.

WIND: West 10 to 20 mph with gusts up to 30 to 35 mph.

HUMIDITY: As low as 12 to 15 percent, especially at elevations below 10,000 feet. RH recovery will be poor at elevations below 9,000 feet.

What 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: NWS Riverton WY

Red Flag Warning (WARNING) - expires September 10, 2026 at 9:00 AM EDT

Areas affected: Lincoln and Uinta Counties/Lower Elevations; Upper Green River Basin/Rock Springs BLM; Sweetwater County/Rock Springs BLM/Flaming Gorge NRA

Red Flag Warning issued September 9 at 12:58PM MDT until September 10 at 9:00PM MDT by NWS Riverton WY

- AFFECTED AREA: In Southwest WY Fire Zones...277\...279\. In West Central WY Fire Zone....278\.

COUNTIES AFFECTED: In Southwest WY...Sweetwater...Uinta. In West Central WY...Lincoln...Sublette.

IMPACTS: Low Humidities and Strong Gusty Winds could cause erratic fire behavior.

WIND: West 10 to 20 mph with gusts up to 25 to 30 mph. Thursday, west 15 to 25 mph with gusts of 30 to 35 mph.

HUMIDITY: As low as 10 percent. RH recovery will be fair to poor tonight in zones 277 and 279.

Source: NWS Riverton WY

Red Flag Warning (WARNING) - expires September 10, 2026 at 9:00 AM EDT

Areas affected: Natrona County/Casper BLM; Granite/Green/Ferris/Rattlesnake Mountains; Casper Mountain

Red Flag Warning issued September 9 at 12:58PM MDT until September 10 at 9:00PM MDT by NWS Riverton WY

- AFFECTED AREA: In Central WY...Fire Weather Zones 280\...289 and 300\.

COUNTIES AFFECTED: In Central WY...Fremont...Natrona. In Southwest WY...Sweetwater.

IMPACTS: Low Humidities and Strong Gusty Winds could cause erratic fire behavior.

WIND: West 12 to 18 mph with gusts up to 25 to 30 mph. Thursday, west to southwest 15 to 20 mph with gusts up to 35 to 40 mph.

HUMIDITY: As low as 8 percent. Thursday, as low as 6 to 8 percent. RH recovery will be poor tonight.

Source: NWS Riverton WY

Red Flag Warning (WARNING) - expires September 10, 2026 at 8:15 AM EDT

Areas affected: North Laramie Range and Adjacent High Plains; North Laramie Valley/Shirley Basin; Ferris/Seminoe/Shirley Mountains; Central and West Carbon; Upper North Platte River Basin; North Snowy Range Foothills

Red Flag Warning issued September 9 at 12:01PM MDT until September 10 at 8:00PM MDT by NWS Cheyenne WY

- AFFECTED AREA...Fire weather zones 419, 420, 421, 422, 425, and 427\.

WIND...Westerly 15 to 30 MPH with occasional gusts up to 40 MPH. The strongest winds will occur Thursday afternoon.

HUMIDITY...10 to 15% Wednesday afternoon and as low as 5% Thursday afternoon. Poor overnight recoveries Wednesday and Thursday night, as low as 20% to 30%.

IMPACTS...Any fires that develop will likely spread rapidly. Outdoor burning is not recommended.

What 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: NWS Cheyenne WY

Source

Alert data provided by the National Weather Service (NWS). This page shows active alerts only and is refreshed daily. For real-time updates, visit weather.gov.

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