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 |
| Effective: | 2026-08-06 @ 2:51 am -> 2026-08-06 @ 10:00 pm |
| Onset: | 2026-08-06 @ 1:00 pm -> 2026-08-06 @ 10:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Riverton WY on 2026-08-06 @ 2:51 am |
| Headline: | Red Flag Warning issued August 6 at 1:51AM MDT until August 6 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 Southwest WY Fire Zones...277...279. In West Central WY Fire Zone....278. * COUNTIES AFFECTED: In Southwest WY...Sweetwater...Uinta. In West Central WY...Lincoln...Sublette. * WIND: Northwest 10 to 20 mph with gusts up to 30 mph. * HUMIDITY: As low as 6 percent. * TEMPERATURES: Highs in the upper 80s to lower 90s. |
| Alert: | Red Flag Warning |
| Area(s): | Natrona County/Casper BLM; Johnson County/Casper BLM; Upper Wind River Basin/Wind River Basin; Granite/Green/Ferris/Rattlesnake Mountains; Casper Mountain |
| Effective: | 2026-08-06 @ 2:51 am -> 2026-08-06 @ 10:00 pm |
| Onset: | 2026-08-06 @ 1:00 pm -> 2026-08-06 @ 10:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Riverton WY on 2026-08-06 @ 2:51 am |
| Headline: | Red Flag Warning issued August 6 at 1:51AM MDT until August 6 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 Zones...280...283...289...300. In North Central WY Fire Zone....281. * COUNTIES AFFECTED: In Central WY...Fremont...Natrona. In North Central WY...Johnson. In Southwest WY...Sweetwater. * WIND: Northwest 10 to 20 mph with gusts up to 30 mph. * HUMIDITY: As low as 6 percent. * TEMPERATURES: Highs in the 90s. |
| Alert: | Red Flag Warning |
| Area(s): | East Wind River Mountains/South Shoshone NF |
| Effective: | 2026-08-06 @ 2:51 am -> 2026-08-06 @ 10:00 pm |
| Onset: | 2026-08-06 @ 1:00 pm -> 2026-08-06 @ 10:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Riverton WY on 2026-08-06 @ 2:51 am |
| Headline: | Red Flag Warning issued August 6 at 1:51AM MDT until August 6 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 8 percent. * TEMPERATURES: Highs around 80. |
| 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; Southern Laramie Valley; Southern Laramie Range; Laramie Foothills and High Plains |
| Effective: | 2026-08-06 @ 1:21 am -> 2026-08-06 @ 9:00 pm |
| Onset: | 2026-08-06 @ 12:00 pm -> 2026-08-06 @ 9:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Cheyenne WY on 2026-08-06 @ 1:21 am |
| Headline: | Red Flag Warning issued August 6 at 12:21AM MDT until August 6 at 8:00PM MDT by NWS Cheyenne WY |
| Description: |
* AFFECTED AREA...Fire weather zone 417 through 425 and 428 through 430. * WIND...West to northwest winds from 15 to 25 mph with gusts up to 35 mph. * HUMIDITY...Between 5 and 10 percent. * IMPACTS...Any fires that develop will likely spread rapidly. Outdoor burning is not recommended. |
| Alert: | Red Flag Warning |
| Area(s): | Ferris/Seminoe/Shirley Mountains; Central and West Carbon; Southwest Carbon County; Sierra Madre Range/Medicine Bow NF; Upper North Platte River Basin; Snowy Range/Medicine Bow NF; North Snowy Range Foothills |
| Effective: | 2026-08-06 @ 1:21 am -> 2026-08-06 @ 9:00 pm |
| Onset: | 2026-08-06 @ 1:21 am -> 2026-08-06 @ 9:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Cheyenne WY on 2026-08-06 @ 1:21 am |
| Headline: | Red Flag Warning issued August 6 at 12:21AM MDT until August 6 at 8:00PM MDT by NWS Cheyenne WY |
| Description: |
* AFFECTED AREA...Fire weather zones 421 through 425. * WIND...West to northwest winds from 15 to 25 mph with gusts up to 35 mph. * HUMIDITY...Between 5 and 10 percent. * IMPACTS...Any fires that develop will likely spread rapidly. Outdoor burning is not recommended. |
| 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; Wind River Mountains West; Wind River Mountains East; Upper Wind River Basin; Wind River Basin; Lander Foothills; Green Mountains and Rattlesnake Range; Natrona County Lower Elevations; Casper Mountain; Star Valley; Salt River and Wyoming Ranges; Upper Green River Basin Foothills; Upper Green River Basin; South Lincoln County; Rock Springs and Green River; Flaming Gorge; East Sweetwater County |
| Effective: | 2026-08-05 @ 12:07 pm -> 2026-08-06 @ 12:00 pm |
| Onset: | 2026-08-05 @ 12:07 pm |
| Severity: | Unknown |
| Certainty: | Unknown |
| Urgency: | Unknown |
| Issued By: | NWS Riverton WY on 2026-08-05 @ 12:07 pm |
| Headline: | Air Quality Alert issued August 5 at 11:07AM 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...All of central and western Wyoming. * WHEN...11 AM MDT Wednesday to 11 AM MDT Thursday. * 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): | Southwest Wyoming |
| Effective: | 2026-08-05 @ 12:01 pm -> 2026-08-06 @ 12:00 pm |
| Onset: | 2026-08-05 @ 12:01 pm |
| Severity: | Unknown |
| Certainty: | Unknown |
| Urgency: | Unknown |
| Issued By: | NWS Salt Lake City UT on 2026-08-05 @ 12:01 pm |
| Headline: | Air Quality Alert issued August 5 at 11:01AM MDT by NWS Salt Lake City UT |
| Description: |
The following is transmitted in collaboration with the Wyoming Department of Environmental Quality, Air Quality Division and the Wyoming Department of Health until 11 AM MDT Thursday. * WHAT...Air Quality Alert for Wildfire Smoke. * WHERE...Uinta County in southwest Wyoming. * WHEN...11 AM Wednesday to 11 AM Thursday. * IMPACTS...Heavy smoke from wildfires across the Pacific Northwest has been observed across southwest Wyoming. 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 provides 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): | 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: | 2026-08-05 @ 11:33 am -> 2026-08-06 @ 12:00 pm |
| Onset: | 2026-08-05 @ 11:33 am |
| Severity: | Unknown |
| Certainty: | Unknown |
| Urgency: | Unknown |
| Issued By: | NWS Cheyenne WY on 2026-08-05 @ 11:33 am |
| Headline: | Air Quality Alert issued August 5 at 10:33AM 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...All of southeast Wyoming WHEN...11 AM today until 11 AM Thursday IMPACTS...Heavy smoke from distant 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): | Northeast Bighorn Mountains; Sheridan Foothills |
| Effective: | 2026-08-05 @ 11:28 am -> 2026-08-06 @ 12:30 pm |
| Onset: | 2026-08-05 @ 11:28 am |
| Severity: | Unknown |
| Certainty: | Unknown |
| Urgency: | Unknown |
| Issued By: | NWS Billings MT on 2026-08-05 @ 11:28 am |
| Headline: | Air Quality Alert issued August 5 at 10:28AM 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...Now through 11am Thursday. 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: | 2026-08-05 @ 11:21 am -> 2026-08-06 @ 12:00 pm |
| Onset: | 2026-08-05 @ 11:21 am |
| Severity: | Unknown |
| Certainty: | Unknown |
| Urgency: | Unknown |
| Issued By: | NWS Rapid City SD on 2026-08-05 @ 11:21 am |
| Headline: | Air Quality Alert issued August 5 at 10:21AM 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 Thursday. * IMPACTS...Poor air quality due to wildfire smoke. |