Air Quality Alert
Issued by NWS Riverton, WY
Issued by NWS Riverton, WY
457 AEUS75 KRIW 041710 AQARIW Air Quality Alert Message Relayed by National Weather Service Riverton WY 1110 AM MDT Thu Sep 4 2025 WYZ001>020-022>030-050600- 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- Including the cities of Lake, Mammoth, Old Faithful, Clark, Cody, Meeteetse, Basin, Greybull, Lovell, Powell, Shell, Thermopolis, Ten Sleep, Worland, Buffalo, Kaycee, Jackson, Dubois, Riverton, Shoshoni, Lander, Jeffrey City, Casper, Afton, Alpine, Star Valley Ranch, Thayne, Pinedale, La Barge, Big Piney, Farson, Kemmerer, Cokeville, Rock Springs, Green River, and Wamsutter 1110 AM MDT Thu Sep 4 2025 ...AIR QUALITY ALERT IN EFFECT UNTIL 12 AM MDT FRIDAY... 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...Big Horn, Fremont, Hot Springs, Johnson, Lincoln, Natrona, Park, Sublette, Sweetwater, Teton, and Washakie Counties. * WHEN...Until 12 AM Friday September 5. * IMPACTS...Smoke from Western Canadian wildfires continues to be observed across 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/. $$