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. |