Weather Warnings for Wyoming

Issued by the National Weather Service

Current watches, warnings, and advisories for Wyoming
Alerts Updated: September 14, 2026, 11:24 pm  UTC


Freeze Warning issued September 14 at 3:35PM MDT until September 15 at 9:00AM MDT by NWS Riverton WY

Summary: * WHAT...Sub-freezing temperatures 26 to 30 degrees expected. Isolated cold prone areas 22 to 26 degrees. * WHERE...Star Valley. * WHEN...From 3 AM to 9 AM MDT Tuesday. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing.
Severity:  Severe    Effective:  September 14, 2026, 3:35 pm      Expires:  September 15, 2026, 9:00 am
Area:  Star Valley


The High Wind Warning has been cancelled.

Summary: The High Wind Warning has been cancelled and is no longer in effect.
Severity:  Minor    Effective:  September 14, 2026, 1:38 pm      Expires:  September 14, 2026, 1:54 pm
Area:  North Snowy Range Foothills


Red Flag Warning issued September 14 at 2:51AM MDT until September 14 at 8:00PM MDT by NWS Riverton WY

Summary: * AFFECTED AREA: In Central WY Fire Zones...280...283...289...300. In Southwest WY Fire Zone....279. * 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 20 to 30 mph with gusts up to 45 mph. * HUMIDITY: As low as 10 to 15 percent.
Severity:  Severe    Effective:  September 14, 2026, 2:51 am      Expires:  September 14, 2026, 8:00 pm
Area:  Sweetwater County/Rock Springs BLM/Flaming Gorge NRA; Natrona County/Casper BLM; Upper Wind River Basin/Wind River Basin; Granite/Green/Ferris/Rattlesnake Mountains; Casper Mountain


Red Flag Warning issued September 14 at 1:26AM MDT until September 14 at 8:00PM MDT by NWS Cheyenne WY

Summary: * AFFECTED AREA...Fire weather zones 417-423, 427, 432, and 433. * WIND...West to Northwest winds 20 to 40 mph, gusts between 45 to 60 mph. * HUMIDITY...Relative humidities as low as 10 to 20%. * IMPACTS...any fires that develop will likely spread rapidly. Outdoor burning is not recommended.
Severity:  Severe    Effective:  September 14, 2026, 1:26 am      Expires:  September 14, 2026, 8:00 pm
Area:  Niobrara/Lower Elevations of Converse/Thunder Basin National Grassland; Middle North Platte River Basin/Niobrara and Converse High Plains; North Laramie Range and Adjacent High Plains; North Laramie Valley/Shirley Basin; Ferris/Seminoe/Shirley Mountains; Central and West Carbon; Southwest Carbon County; North Snowy Range Foothills; Bordeaux/Chugwater/Wheatland; Goshen/Middle-Lower North Platte River Basin