Cheyenne, Wyoming
Regional Weather Alerts
| Alert: | Special Weather Statement |
| Area(s): | Wind River Mountains East; Upper Wind River Basin; Wind River Basin; Lander Foothills; Green Mountains and Rattlesnake Range |
| Effective: | 2026-10-23 @ 7:14 am -> 2026-10-23 @ 8:45 am |
| Onset: | 2026-10-23 @ 7:14 am |
| Severity: | Moderate |
| Certainty: | Observed |
| Urgency: | Expected |
| Issued By: | NWS Riverton WY on 2026-10-23 @ 7:14 am |
| Headline: | Special Weather Statement issued October 23 at 6:14AM MDT by NWS Riverton WY |
| Description: |
At 613 AM MDT, Doppler radar was tracking gusty showers along a line extending from 8 miles east of Fremont Peak to 15 miles west of Sweetwater Station. Movement was northeast at 30 mph. HAZARD...Wind gusts up to 50 mph, stronger up to 70 mph from Red Canyon to South Pass along Highway 28. SOURCE...Radar indicated. IMPACT...Gusty winds could knock down tree limbs and blow around unsecured objects. Strong thunderstorms will be near... Red Canyon and Sinks Canyon State Park around 620 AM MDT. Lander and Milford around 625 AM MDT. Bull Lake around 630 AM MDT. Other locations in the path of these storms include Fort Washakie, Sweetwater Station, Ethete, Hudson, Crowheart and Diversion Dam Rest Area. |
| Alert: | Red Flag Warning |
| Area(s): | Northern Cheyenne Indian Reservation/Ashland Ranger District Custer Natl Forest; Sioux Ranger District Custer National Forest; Sheridan County/Casper BLM |
| Effective: | 2026-10-23 @ 3:43 am -> 2026-10-24 @ 1:00 am |
| Onset: | 2026-10-23 @ 1:00 pm -> 2026-10-24 @ 1:00 am |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Billings MT on 2026-10-23 @ 3:43 am |
| Headline: | Red Flag Warning issued October 23 at 2:43AM MDT until October 24 at 12:00AM MDT by NWS Billings MT |
| Description: |
* IMPACTS: Low humidities, unseasonably warm temperatures, strong gusty winds, and a wind shift with a cold front will create erratic fire behavior and difficult control of new or existing fires. * AFFECTED AREA: In North Central WY Fire Zone...274. In Southeast MT Fire Zone...131. In Southeast MT and Northwest SD Fire Zone...133. * COUNTIES AFFECTED: In North Central WY...Sheridan. In Northwest SD...Harding. In South Central MT...Big Horn. In Southeast MT...Carter...Fallon...Powder River...Rosebud Treasure. The most dangerous conditions are expected along and southeast of a Baker Montana to Sheridan Wyoming line. * COLD FRONT: Late afternoon into early evening. * WIND: Southwest 20 to 30 mph gusting up to 45 mph. Winds shifting to the northwest behind a late day cold front, with continued gusts to 45 mph through much of tonight. * HUMIDITY: Minimums of 14 to 20 percent. * TEMPERATURES: Highs of 75 to 85 degrees. |
| Alert: | Special Weather Statement |
| Area(s): | Niobrara County |
| Effective: | 2026-10-23 @ 2:41 am -> 2026-10-23 @ 7:00 pm |
| Onset: | 2026-10-23 @ 2:41 am |
| Severity: | Moderate |
| Certainty: | Observed |
| Urgency: | Expected |
| Issued By: | NWS Cheyenne WY on 2026-10-23 @ 2:41 am |
| Headline: | Special Weather Statement issued October 23 at 1:41AM MDT by NWS Cheyenne WY |
| Description: |
Elevated fire concerns are anticipated this afternoon across northern portions of Niobrara County. Afternoon humidity will drop to around 15 to 20% with breezy winds. Fires will spread more easily under these conditions. Outdoor burning is not recommended. Expect improving conditions after sunset. |
| Alert: | High Wind Warning |
| Area(s): | Ferris/Seminoe/Shirley Mountains; Shirley Basin; Central Carbon County; North Snowy Range Foothills; Southwest Carbon County |
| Effective: | 2026-10-23 @ 2:20 am -> 2026-10-23 @ 4:00 pm |
| Onset: | 2026-10-23 @ 6:00 am -> 2026-10-23 @ 4:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Cheyenne WY on 2026-10-23 @ 2:20 am |
| Headline: | High Wind Warning issued October 23 at 1:20AM MDT until October 23 at 3:00PM MDT by NWS Cheyenne WY |
| Description: |
* WHAT...Southwest winds 30 to 40 mph with gusts up to 60 mph expected. * WHERE...North Snowy Range Foothills including Arlington and Elk Mountain along Interstate 80, Ferris/Seminoe/Shirley Mountains, Shirley Basin, Central Carbon County, and Southwest Carbon County. * WHEN...From 5 AM early this morning to 3 PM MDT this afternoon. * IMPACTS...Mainly to transportation. Strong cross winds will be hazardous to light weight or high profile vehicles, including campers and tractor trailers. |
| Alert: | Red Flag Warning |
| Area(s): | Johnson County/Casper BLM |
| Effective: | 2026-10-22 @ 11:45 pm -> 2026-10-23 @ 9:00 pm |
| Onset: | 2026-10-23 @ 1:00 pm -> 2026-10-23 @ 9:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Riverton WY on 2026-10-22 @ 11:45 pm |
| Headline: | Red Flag Warning issued October 22 at 10:45PM MDT until October 23 at 8:00PM MDT by NWS Riverton WY |
| Description: |
* IMPACTS: Low Humidities...Unseasonably Warm Temperatures... Strong Gusty Winds...and Wind Shift with a Cold Front could cause erratic fire behavior. * AFFECTED AREA: In North Central WY...Fire Weather Zone 281. * COUNTIES AFFECTED: In North Central WY...Johnson. * COLD FRONT: Moves in after 6 PM MDT Friday, with northwesterly 20 to 30 mph winds and gusts up to 40 mph. * WIND: Southwest 30 to 40 mph with gusts up to 55 mph. * HUMIDITY: As low as 20 percent. * TEMPERATURES: Highs in the upper 60s. |
| Alert: | Air Quality Alert |
| Area(s): | Northern Campbell; Southern Campbell |
| Effective: | 2026-10-22 @ 9:38 pm -> 2026-10-23 @ 8:00 pm |
| Onset: | 2026-10-22 @ 9:38 pm |
| Severity: | Unknown |
| Certainty: | Unknown |
| Urgency: | Unknown |
| Issued By: | NWS Rapid City SD on 2026-10-22 @ 9:38 pm |
| Headline: | Air Quality Alert issued October 22 at 8:38PM MDT by NWS Rapid City SD |
| Description: |
The following message is transmitted in collaboration with the Wyoming Department of Environmental Quality, Air Quality Division. * WHAT...Strong southwest winds with gusts up to 55 mph. * WHERE...Powder River Basin of northeastern Wyoming. * WHEN...Late Friday morning through early Friday evening. * IMPACTS...The strong winds will create blowing dust. |
| Alert: | Red Flag Warning |
| Area(s): | Northern Campbell; Southern Campbell; Crook County Plains; Weston County Plains |
| Effective: | 2026-10-22 @ 8:38 pm -> 2026-10-23 @ 11:45 am |
| Onset: | 2026-10-23 @ 12:00 pm -> 2026-10-24 @ 12:00 am |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Rapid City SD on 2026-10-22 @ 8:38 pm |
| Headline: | Red Flag Warning issued October 22 at 7:38PM MDT until October 23 at 11:00PM MDT by NWS Rapid City SD |
| Description: |
...RED FLAG WARNING IN EFFECT FROM 11 AM TO 11 PM MDT FRIDAY DUE TO GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR NORTHERN FOOT HILLS, BUTTE COUNTY AREA, AND WYOMING BLACK HILLS... ...RED FLAG WARNING REMAINS IN EFFECT FROM 11 AM TO 11 PM MDT FRIDAY DUE TO GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR NORTHERN CAMPBELL, SOUTHERN CAMPBELL, CROOK COUNTY PLAINS, AND WESTON COUNTY PLAINS... * AFFECTED AREA...Fire Weather Zones 314, 315, 316, and 317. * TIMING...From 11 AM to 11 PM MDT Friday. * WINDS...Southwest winds 25 to 35 mph with gusts up to 55 mph. * RELATIVE HUMIDITY...As low as 15 percent. * IMPACTS...Any fires that develop will spread rapidly. Outdoor burning is not recommended. |
| Alert: | Red Flag Warning |
| Area(s): | Northern Foot Hills; Butte County Area; Wyoming Black Hills |
| Effective: | 2026-10-22 @ 8:38 pm -> 2026-10-23 @ 11:45 am |
| Onset: | 2026-10-23 @ 12:00 pm -> 2026-10-24 @ 12:00 am |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Rapid City SD on 2026-10-22 @ 8:38 pm |
| Headline: | Red Flag Warning issued October 22 at 7:38PM MDT until October 23 at 11:00PM MDT by NWS Rapid City SD |
| Description: |
...RED FLAG WARNING IN EFFECT FROM 11 AM TO 11 PM MDT FRIDAY DUE TO GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR NORTHERN FOOT HILLS, BUTTE COUNTY AREA, AND WYOMING BLACK HILLS... ...RED FLAG WARNING REMAINS IN EFFECT FROM 11 AM TO 11 PM MDT FRIDAY DUE TO GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR NORTHERN CAMPBELL, SOUTHERN CAMPBELL, CROOK COUNTY PLAINS, AND WESTON COUNTY PLAINS... * AFFECTED AREA...Fire Weather Zones 318, 323, and 327. * TIMING...From 11 AM to 11 PM MDT Friday. * WINDS...Southwest winds 15 to 25 mph with gusts up to 40 mph. * RELATIVE HUMIDITY...As low as 15 percent. * IMPACTS...Any fires that develop will spread rapidly. Outdoor burning is not recommended. |
