Cheyenne, Wyoming
Regional Weather Alerts
| Alert: | Red Flag Warning |
| Area(s): | East Wind River Mountains/South Shoshone NF |
| Effective: | 2026-08-07 @ 2:12 am -> 2026-08-07 @ 10:00 pm |
| Onset: | 2026-08-07 @ 1:00 pm -> 2026-08-07 @ 10:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Riverton WY on 2026-08-07 @ 2:12 am |
| Headline: | Red Flag Warning issued August 7 at 1:12AM MDT until August 7 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 this evening. * IMPACTS: Low Humidities...Hot Temperatures...and Strong Gusty Winds could cause erratic fire behavior. * AFFECTED AREA: In Central WY...Fire Weather Zone 288. * COUNTIES AFFECTED: In Central WY...Fremont. In West Central WY...Sublette. * WIND: West 15 to 25 mph with gusts up to 35 mph. * HUMIDITY: As low as 9 percent. * TEMPERATURES: Highs in the upper 70s to mid 80s. |
| Alert: | Red Flag Warning |
| Area(s): | Lincoln and Uinta Counties/Lower Elevations; Upper Green River Basin/Rock Springs BLM; Sweetwater County/Rock Springs BLM/Flaming Gorge NRA; Granite/Green/Ferris/Rattlesnake Mountains |
| Effective: | 2026-08-07 @ 2:12 am -> 2026-08-07 @ 10:00 pm |
| Onset: | 2026-08-07 @ 1:00 pm -> 2026-08-07 @ 10:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Riverton WY on 2026-08-07 @ 2:12 am |
| Headline: | Red Flag Warning issued August 7 at 1:12AM MDT until August 7 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 this evening. * IMPACTS: Low Humidities...Hot Temperatures...and Strong Gusty Winds could cause erratic fire behavior. * AFFECTED AREA: In Central WY Fire Zone....289. In Southwest WY Fire Zones...277...279. In West Central WY Fire Zone....278. * COUNTIES AFFECTED: In Central WY...Fremont...Natrona. In Southwest WY...Sweetwater...Uinta. In West Central WY...Lincoln...Sublette. * WIND: West 10 to 20 mph with gusts up to 30 mph. * HUMIDITY: As low as 7 percent. * TEMPERATURES: Highs in the 90s. |
| Alert: | Red Flag Warning |
| Area(s): | North Laramie Valley/Shirley Basin; Ferris/Seminoe/Shirley Mountains; Central and West Carbon; Upper North Platte River Basin; Snowy Range/Medicine Bow NF; North Snowy Range Foothills |
| Effective: | 2026-08-07 @ 1:00 am -> 2026-08-07 @ 9:00 pm |
| Onset: | 2026-08-07 @ 12:00 pm -> 2026-08-07 @ 9:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Cheyenne WY on 2026-08-07 @ 1:00 am |
| Headline: | Red Flag Warning issued August 7 at 12:00AM MDT until August 7 at 8:00PM MDT by NWS Cheyenne WY |
| Description: |
The National Weather Service in Cheyenne has issued a Red Flag Warning, which is in effect from 11 AM to 8 PM MDT Friday. * AFFECTED AREA...Fire weather zone 420. * WIND...West winds from 15 to 25 mph with gusts up to 35 mph. * HUMIDITY...Daytime minimum RH between 5 and 10 percent. * IMPACTS...Any fires that develop will likely spread rapidly. Outdoor burning is not recommended. |
| Alert: | Fire Weather Watch |
| Area(s): | Gallatin National Forest; Wheatland County/Sweet Grass County; Stillwater County; Beartooth Ranger District Custer National Forest; Golden Valley County/Musselshell County; Yellowstone County; Crow Indian Reservation/Big Horn Canyon Rec Area; Northern Rosebud/Northern Treasure Counties; Northern Cheyenne Indian Reservation/Ashland Ranger District Custer Natl Forest; Sheridan County/Casper BLM; Bighorn National Forest |
| Effective: | 2026-08-06 @ 9:01 pm -> 2026-08-07 @ 9:15 pm |
| Onset: | 2026-08-08 @ 12:00 pm -> 2026-08-08 @ 10:00 pm |
| Severity: | Severe |
| Certainty: | Possible |
| Urgency: | Future |
| Issued By: | NWS Billings MT on 2026-08-06 @ 9:01 pm |
| Headline: | Fire Weather Watch issued August 6 at 8:01PM MDT until August 8 at 9:00PM MDT by NWS Billings MT |
| Description: |
* IMPACTS: Low humidities, hot temperatures, and strong gusty winds will create erratic fire behavior and new fire starts. * AFFECTED AREA: In North Central WY Fire Zones...274...284. In South Central MT Fire Zones...123...124...125...126...127 128...129. In Southeast MT Fire Zones...130...131. * COUNTIES AFFECTED: In Central MT...Golden Valley...Musselshell...Wheatland. In North Central WY...Big Horn...Johnson...Sheridan...Washakie. In South Central MT...Big Horn...Carbon...Park...Stillwater Sweet Grass...Yellowstone. In Southeast MT...Powder River...Rosebud...Treasure. In Southwest MT...Gallatin. * WIND: Northwest 5 to 15 mph with gusts up to 30 mph. * HUMIDITY: As low as 11 percent. * TEMPERATURES: Up to 100. |
| Alert: | Air Quality Alert |
| Area(s): | Yellowstone National Park; Absaroka Mountains; Cody Foothills; North Bighorn Basin; Southwest Bighorn Basin; Southeast Bighorn Basin; Owl Creek and Bridger Mountains; Bighorn Mountains West; Bighorn Mountains Southeast; Northeast Johnson County; Southeast Johnson County; Teton and Gros Ventre Mountains; Jackson Hole; Upper Wind River Basin; Wind River Basin; Lander Foothills |
| Effective: | 2026-08-06 @ 12:28 pm -> 2026-08-07 @ 12:00 pm |
| Onset: | 2026-08-06 @ 12:28 pm |
| Severity: | Unknown |
| Certainty: | Unknown |
| Urgency: | Unknown |
| Issued By: | NWS Riverton WY on 2026-08-06 @ 12:28 pm |
| Headline: | Air Quality Alert issued August 6 at 11:28AM MDT by NWS Riverton WY |
| Description: |
The following message is transmitted on behalf of the Wyoming Department of Environmental Quality, Air Quality Division, and the Wyoming Department of Health. * WHAT...Air Quality Alert for Wildfire Smoke. * WHERE...Portions of northern and central Wyoming. * WHEN...11 AM MDT Thursday through 11 AM MDT Friday. * IMPACTS...Smoke from wildfires across the Pacific Northwest will move over Wyoming and limit visibilities and lead to poor air quality. HEALTH INFORMATION...The Wyoming Department of Health recommends that the elderly, young children, and individuals with respiratory problems avoid excessive physical exertion and minimize outdoor activities during this time. Wildfire smoke is made up of a variety of pollutants, including particulate matter and ozone, which can cause respiratory health effects. Although these people are most susceptible to health impacts, the Department of Health also advises that everyone should avoid prolonged exposure to poor air quality conditions. CURRENT CONDITIONS...The Wyoming Department of Environmental Quality, Air Quality Division offers near real-time air quality data for Wyoming's monitoring stations and health effects information to help the public interpret current conditions. Current air quality conditions across the state of Wyoming can be found at http://www.wyvisnet.com/. |
| Alert: | Air Quality Alert |
| Area(s): | Northeast Bighorn Mountains; Sheridan Foothills |
| Effective: | 2026-08-06 @ 12:11 pm -> 2026-08-07 @ 1:00 pm |
| Onset: | 2026-08-06 @ 12:11 pm |
| Severity: | Unknown |
| Certainty: | Unknown |
| Urgency: | Unknown |
| Issued By: | NWS Billings MT on 2026-08-06 @ 12:11 pm |
| Headline: | Air Quality Alert issued August 6 at 11:11AM MDT by NWS Billings MT |
| Description: |
The following message is transmitted on behalf of the Wyoming Department of Environmental Quality, Air Quality Division and the Wyoming Department of Health. WHAT...Air Quality Alert for Wildfire Smoke. WHERE...Sheridan County, Wyoming. WHEN...Through 11am Friday. IMPACTS...Heavy smoke from regional wildfires will continue to reduce air quality. HEALTH INFORMATION...The Wyoming Department of Health recommends the elderly, young children, and individuals with respiratory problems avoid excessive physical exertion and minimize outdoor activities during this time. Wildfire smoke is made up of a variety of pollutants, including particulate matter and ozone, which can cause respiratory health effects. Although these people are most susceptible to health impacts, the Department of Health also advises that everyone should avoid prolonged exposure to poor air quality conditions. CURRENT CONDITIONS...The Wyoming Department of Environmental Quality, Air Quality Division offers near real-time air quality data for Wyoming's monitoring stations and health effects information to help the public interpret current conditions. Current air quality conditions across the state of Wyoming can be found at http://www.wyvisnet.com/ |
| Alert: | Air Quality Alert |
| Area(s): | Northern Campbell; Southern Campbell; Western Crook; Wyoming Black Hills; Weston County Plains; Newcastle; Northeastern Crook |
| Effective: | 2026-08-06 @ 11:36 am -> 2026-08-07 @ 12:00 pm |
| Onset: | 2026-08-06 @ 11:36 am |
| Severity: | Unknown |
| Certainty: | Unknown |
| Urgency: | Unknown |
| Issued By: | NWS Rapid City SD on 2026-08-06 @ 11:36 am |
| Headline: | Air Quality Alert issued August 6 at 10:36AM MDT by NWS Rapid City SD |
| Description: |
The following message is transmitted in collaboration with the Wyoming Department of Environmental Quality, Air Quality Division, and the Wyoming Department of Health. * WHAT...Air Quality Alert for Wildfire Smoke. * WHERE...Northeast Wyoming. * WHEN...Through 11 AM MDT Friday. * IMPACTS...Poor air quality due to wildfire smoke. |