Cheyenne, Wyoming
Regional Weather Alerts
| Alert: | Red Flag Warning |
| Area(s): | Southwest Carbon County; Southern Laramie Valley |
| Effective: | 2026-09-08 @ 7:51 am -> 2026-09-08 @ 7:00 pm |
| Onset: | 2026-09-08 @ 1:00 pm -> 2026-09-08 @ 9:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Cheyenne WY on 2026-09-08 @ 7:51 am |
| Headline: | Red Flag Warning issued September 8 at 6:51AM MDT until September 8 at 8:00PM MDT by NWS Cheyenne WY |
| Description: |
...RED FLAG WARNING GOES INTO AFFECT AT NOON... The National Weather Service in Cheyenne has issued a Red Flag Warning, which is in effect from noon today to 8 PM MDT this evening. * AFFECTED AREA...Fire weather zone 417.Fire weather zone 418.Fire weather zone 419.Fire weather zone 420.Fire weather zone 421.Fire weather zone 422.Fire weather zone 427. * WIND... WESTERLY WINDS GUSTING 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): | 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; North Snowy Range Foothills |
| Effective: | 2026-09-08 @ 7:51 am -> 2026-09-08 @ 7:00 pm |
| Onset: | 2026-09-08 @ 1:00 pm -> 2026-09-08 @ 9:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Cheyenne WY on 2026-09-08 @ 7:51 am |
| Headline: | Red Flag Warning issued September 8 at 6:51AM MDT until September 8 at 8:00PM MDT by NWS Cheyenne WY |
| Description: |
...RED FLAG WARNING GOES INTO AFFECT AT NOON... * AFFECTED AREA...Fire weather zone 417.Fire weather zone 418.Fire weather zone 419.Fire weather zone 420.Fire weather zone 421.Fire weather zone 422.Fire weather zone 427. * WIND... WESTERLY WINDS GUSTING 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): | Cody Foothills; Upper Wind River Basin/Wind River Basin; South Bighorn Mountains; Owl Creek Mountains |
| Effective: | 2026-09-08 @ 1:58 am -> 2026-09-08 @ 8:00 pm |
| Onset: | 2026-09-08 @ 1:00 pm -> 2026-09-08 @ 8:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Riverton WY on 2026-09-08 @ 1:58 am |
| Headline: | Red Flag Warning issued September 8 at 12:58AM MDT until September 8 at 7:00PM MDT by NWS Riverton WY |
| Description: |
The National Weather Service in Riverton has issued a Red Flag Warning, which is in effect from noon today to 7 PM MDT this evening. * IMPACTS: Low Humidities...Strong Gusty Winds...and Wind Shift with a Cold Front could cause erratic fire behavior. * AFFECTED AREA: In Central WY Fire Zones...283...285. In North Central WY Fire Zones...276...287. * COUNTIES AFFECTED: In Central WY...Fremont...Natrona. In North Central WY...Hot Springs...Johnson...Park...Washakie. * COLD FRONT: A cold front will reach northern portions of the Bighorn Basin around 1800. Winds will turn more northerly as the front progresses southward through the evening. * WIND: West 10 to 20 mph with gusts up to 30 mph. * HUMIDITY: Ranging between 12 and 19 percent. |
| Alert: | Red Flag Warning |
| Area(s): | Natrona County/Casper BLM; Granite/Green/Ferris/Rattlesnake Mountains; Casper Mountain |
| Effective: | 2026-09-08 @ 1:58 am -> 2026-09-08 @ 8:00 pm |
| Onset: | 2026-09-08 @ 1:00 pm -> 2026-09-10 @ 10:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Riverton WY on 2026-09-08 @ 1:58 am |
| Headline: | Red Flag Warning issued September 8 at 12:58AM MDT until September 10 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 today to 9 PM MDT Thursday. * IMPACTS: Low Humidities...Strong Gusty Winds...and Wind Shift with a Cold Front could cause erratic fire behavior. * AFFECTED AREA: In Central WY...Fire Weather Zones 280...289 and 300. * COUNTIES AFFECTED: In Central WY...Fremont...Natrona. In Southwest WY...Sweetwater. * COLD FRONT: Winds will turn more northerly after sunset tonight, as a cold front comes down from the north. * WIND: Tuesday - West to southwest 15 to 25 mph with gusts up to 35 mph. Wednesday - West to southwest 10 to 15 mph with gusts up to 25 mph. Thursday West to southwest 15 to 25 mph with gusts up to 45 mph. * HUMIDITY: Tuesday - Ranging between 11 to 18 percent. Wednesday - As low as 8 percent. Thursday - As low as 7 percent. |
