Cheyenne, Wyoming
Regional Weather Alerts
| 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: | 2026-08-03 @ 3:41 pm -> 2026-08-03 @ 10:00 pm |
| Onset: | 2026-08-03 @ 3:41 pm -> 2026-08-03 @ 10:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Riverton WY on 2026-08-03 @ 3:41 pm |
| Headline: | Red Flag Warning issued August 3 at 2:41PM MDT until August 3 at 9:00PM MDT by NWS Riverton WY |
| Description: |
* 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. * IMPACTS: Low Humidities and Strong Gusty Winds could cause erratic fire behavior. * WIND: Northwest 20 to 30 mph with gusts up to 35 mph. * HUMIDITY: As low as 8 to 12 percent. |
| Alert: | Red Flag Warning |
| Area(s): | Fall River County Area; Northern Foot Hills; Eastern Foot Hills; Custer County Plains; Pine Ridge Area; Butte County Area; Perkins County; West Central Plains; Ziebach County; Haakon County Area; Badlands Area; Bennett County Area; Weston County Plains |
| Effective: | 2026-08-03 @ 1:20 pm -> 2026-08-03 @ 9:00 pm |
| Onset: | 2026-08-03 @ 1:20 pm -> 2026-08-03 @ 9:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Rapid City SD on 2026-08-03 @ 1:20 pm |
| Headline: | Red Flag Warning issued August 3 at 12:20PM MDT until August 3 at 8:00PM MDT by NWS Rapid City SD |
| Description: |
...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM MDT THIS EVENING DUE TO GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR FALL RIVER COUNTY AREA, NORTHERN FOOT HILLS, EASTERN FOOT HILLS, CUSTER COUNTY PLAINS, PINE RIDGE AREA, BUTTE COUNTY AREA, PERKINS COUNTY, WEST CENTRAL PLAINS, ZIEBACH COUNTY, HAAKON COUNTY AREA, BADLANDS AREA, BENNETT COUNTY AREA, AND WESTON COUNTY PLAINS... * AFFECTED AREA...Fire Weather Zones 317, 322, 323, 324, 325, 326, 327, 328, 329, 330, 331, 332, and 333. * TIMING...Until 8 PM MDT this evening. * WINDS...North winds 25 to 35 mph with gusts up to 55 mph. * RELATIVE HUMIDITY...Relative Humidity as low as 22 percent. * IMPACTS...Any fires that develop will spread rapidly. Outdoor burning is not recommended. |
| Alert: | Air Quality Alert |
| Area(s): | Converse County Lower Elevations; Niobrara County; North Laramie Range; Ferris/Seminoe/Shirley Mountains; Shirley Basin; Central Laramie Range and Southwest Platte County; East Platte County; Goshen County; Central Carbon County; North Snowy Range Foothills; Southwest Carbon County; Sierra Madre Range; Upper North Platte River Basin; Snowy Range; Laramie Valley; South Laramie Range; South Laramie Range Foothills; Central Laramie County; East Laramie County |
| Effective: | 2026-08-03 @ 11:40 am -> 2026-08-04 @ 11:45 am |
| Onset: | 2026-08-03 @ 11:40 am |
| Severity: | Unknown |
| Certainty: | Unknown |
| Urgency: | Unknown |
| Issued By: | NWS Cheyenne WY on 2026-08-03 @ 11:40 am |
| Headline: | Air Quality Alert issued August 3 at 10:40AM MDT by NWS Cheyenne 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...Southeast Wyoming WHEN...11am Monday to 11am Tuesday IMPACTS...Heavy smoke from Pacific Northwest Wildfires 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 effect. 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): | 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; Upper Wind River Basin; Wind River Basin; Lander Foothills; Green Mountains and Rattlesnake Range; Natrona County Lower Elevations; Casper Mountain |
| Effective: | 2026-08-03 @ 11:35 am -> 2026-08-04 @ 11:45 am |
| Onset: | 2026-08-03 @ 11:35 am |
| Severity: | Unknown |
| Certainty: | Unknown |
| Urgency: | Unknown |
| Issued By: | NWS Riverton WY on 2026-08-03 @ 11:35 am |
| Headline: | Air Quality Alert issued August 3 at 10:35AM 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... Yellowstone National Park, the Bighorn Basin, the Wind River Basin, the Absaroka Mountains, the Owl Creek and Bridger Mountains, the Bighorn Mountains, the Rattlesnake Hills and Green Mountains, Johnson County, and Natrona County. * WHEN... 11 AM MDT Monday to 11 AM MDT Tuesday. * IMPACTS...Smoke from western United States wildfires continues to be observed across much of western and central Wyoming. The smoke is limiting visibilities at times. 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: | 2026-08-03 @ 11:35 am -> 2026-08-04 @ 12:45 pm |
| Onset: | 2026-08-03 @ 11:35 am |
| Severity: | Unknown |
| Certainty: | Unknown |
| Urgency: | Unknown |
| Issued By: | NWS Billings MT on 2026-08-03 @ 11:35 am |
| Headline: | Air Quality Alert issued August 3 at 10:35AM 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 11 AM MDT Tuesday IMPACTS...Heavy smoke from 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: | 2026-08-03 @ 11:28 am -> 2026-08-04 @ 12:00 pm |
| Onset: | 2026-08-03 @ 11:28 am |
| Severity: | Unknown |
| Certainty: | Unknown |
| Urgency: | Unknown |
| Issued By: | NWS Rapid City SD on 2026-08-03 @ 11:28 am |
| Headline: | Air Quality Alert issued August 3 at 10:28AM 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...Until 11 AM MDT Tuesday. * IMPACTS...Poor air quality due to wildfire smoke. |
| Alert: | Red Flag Warning |
| Area(s): | North Laramie Valley/Shirley Basin; Ferris/Seminoe/Shirley Mountains; Central and West Carbon; Southwest Carbon County; Upper North Platte River Basin; North Snowy Range Foothills |
| Effective: | 2026-08-02 @ 10:20 pm -> 2026-08-03 @ 10:00 pm |
| Onset: | 2026-08-02 @ 10:20 pm -> 2026-08-03 @ 10:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Cheyenne WY on 2026-08-02 @ 10:20 pm |
| Headline: | Red Flag Warning issued August 2 at 9:20PM MDT until August 3 at 9:00PM MDT by NWS Cheyenne WY |
| Description: |
* AFFECTED AREA...Fire weather zones 420 through 423, 425, and 427. * WIND...10 to 20 mph with gusts up to 35 mph. * HUMIDITY...8 to 12 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; Laramie Foothills and High Plains; Laramie East High Plains; Bordeaux/Chugwater/Wheatland; Goshen/Middle-Lower North Platte River Basin |
| Effective: | 2026-08-02 @ 10:20 pm -> 2026-08-03 @ 10:00 pm |
| Onset: | 2026-08-03 @ 12:00 pm -> 2026-08-03 @ 10:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Cheyenne WY on 2026-08-02 @ 10:20 pm |
| Headline: | Red Flag Warning issued August 2 at 9:20PM MDT until August 3 at 9:00PM MDT by NWS Cheyenne WY |
| Description: |
* AFFECTED AREA...Fire weather zones 417 through 418, and 430 through 433. * WIND...North winds 10 to 20 mph with gusts up to 35 mph. * HUMIDITY...10 to 20 percent. * IMPACTS...Any fires that develop will likely spread rapidly. Outdoor burning is not recommended. |