Cheyenne, Wyoming

Regional Weather Alerts


     

Alert: Red Flag Warning
Area(s): Northern Campbell; Southern Campbell; Weston County Plains
Effective: 2026-09-02 @ 10:38 pm -> 2026-09-03 @ 10:45 am
Onset: 2026-09-03 @ 1:00 pm -> 2026-09-03 @ 9:00 pm
Severity: Severe
Certainty: Likely
Urgency: Expected
Issued By: NWS Rapid City SD on 2026-09-02 @ 10:38 pm
Headline: Red Flag Warning issued September 2 at 9:38PM MDT until September 3 at 8:00PM MDT by NWS Rapid City SD
Description: ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TO 8 PM MDT THURSDAY
DUE TO GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR NORTHERN CAMPBELL,
SOUTHERN CAMPBELL, AND WESTON COUNTY PLAINS...

* AFFECTED AREA...Fire Weather Zones 314, 315, and 317.

* TIMING...From noon to 8 PM MDT Thursday.

* WINDS...Southwest winds 10 to 20 mph with gusts up to 30 mph.

* RELATIVE HUMIDITY...Relative Humidity as low as 8 percent.

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

Alert: Red Flag Warning
Area(s): Crow Indian Reservation/Big Horn Canyon Rec Area; Bighorn National Forest
Effective: 2026-09-02 @ 1:10 pm -> 2026-09-03 @ 1:15 pm
Onset: 2026-09-03 @ 1:00 pm -> 2026-09-03 @ 10:00 pm
Severity: Severe
Certainty: Likely
Urgency: Expected
Issued By: NWS Billings MT on 2026-09-02 @ 1:10 pm
Headline: Red Flag Warning issued September 2 at 12:10PM MDT until September 3 at 9:00PM MDT by NWS Billings MT
Description: The National Weather Service in Billings has issued a Red Flag
Warning...which is in effect from noon to 9 PM MDT Thursday.

* IMPACTS: Low humidities and strong gusty winds will create
erratic fire behavior.

* AFFECTED AREA:
In North Central WY Fire Zone...284.
In South Central MT Fire Zone...129.

* COUNTIES AFFECTED:
In North Central WY...Big Horn...Johnson...Sheridan...Washakie.
In South Central MT...Big Horn...Carbon...Yellowstone.

* WIND: South 10 to 15 mph with gusts up to 35 mph.

* HUMIDITY: As low as 12 percent.

* ADDITIONAL DETAILS: The strongest winds, and area of greatest
concern, in MTZ129 are forecast in the western portion of the
zone.

Alert: Red Flag Warning
Area(s): Niobrara/Lower Elevations of Converse/Thunder Basin National Grassland; Middle North Platte River Basin/Niobrara and Converse High Plains
Effective: 2026-09-02 @ 1:09 pm -> 2026-09-03 @ 8:00 am
Onset: 2026-09-03 @ 1:00 pm -> 2026-09-03 @ 8:00 pm
Severity: Severe
Certainty: Likely
Urgency: Expected
Issued By: NWS Cheyenne WY on 2026-09-02 @ 1:09 pm
Headline: Red Flag Warning issued September 2 at 12:09PM MDT until September 3 at 7:00PM MDT by NWS Cheyenne WY
Description: 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.

Alert: Red Flag Warning
Area(s): North Bighorn Basin/Worland BLM; Cody Foothills; Lincoln and Uinta Counties/Lower Elevations; Upper Green River Basin/Rock Springs BLM; Sweetwater County/Rock Springs BLM/Flaming Gorge NRA; Natrona County/Casper BLM; Johnson County/Casper BLM; South Bighorn Basin/Worland BLM; Upper Wind River Basin/Wind River Basin; South Bighorn Mountains; Absaroka Mountains/North Shoshone NF; Owl Creek Mountains; East Wind River Mountains/South Shoshone NF; Granite/Green/Ferris/Rattlesnake Mountains; Casper Mountain
Effective: 2026-09-02 @ 10:22 am -> 2026-09-03 @ 8:00 am
Onset: 2026-09-03 @ 1:00 pm -> 2026-09-03 @ 10:00 pm
Severity: Severe
Certainty: Likely
Urgency: Expected
Issued By: NWS Riverton WY on 2026-09-02 @ 10:22 am
Headline: Red Flag Warning issued September 2 at 9:22AM MDT until September 3 at 9:00PM MDT by NWS Riverton WY
Description: The National Weather Service in Riverton has issued a Red Flag
Warning, which is in effect from noon to 9 PM MDT Thursday.

* IMPACTS: Low Humidities...Unseasonably Warm Temperatures...and
Strong Gusty Winds could cause erratic fire behavior.

* AFFECTED AREA:
In Central WY Fire Zones...280...283...285...288...289...300.
In North Central WY Fire Zones...275...276...281...282...287.
In Northwest WY Fire Zone....286.
In Southwest WY Fire Zones...277...279.
In West Central WY Fire Zone....278.

* COUNTIES AFFECTED:
In Central WY...Fremont...Natrona.
In North Central WY...Big Horn...Hot Springs...Johnson...Park
Washakie.
In Southwest WY...Sweetwater...Uinta.
In West Central WY...Lincoln...Sublette.

* WIND: Southwest 20 to 30 mph with gusts up to 35 to 45 mph.

* HUMIDITY: As low as 10 to 15 percent.

* TEMPERATURES: Highs in the 70s west of the Divide and the
mountains, in the 80s to near 90 in the lower basins east of the
Divide.