


Air Quality Alert
Issued by NWS Riverton, WY
Issued by NWS Riverton, WY
148 AEUS75 KRIW 201858 AQARIW Air Quality Alert Message Relayed by National Weather Service Riverton WY 1258 PM MDT Wed Aug 20 2025 WYZ005>007-017-211900- Southwest Bighorn Basin-Southeast Bighorn Basin- Owl Creek and Bridger Mountains-Wind River Basin- Including the cities of Thermopolis, Ten Sleep, Worland, Riverton, and Shoshoni 1258 PM MDT Wed Aug 20 2025 ...AIR QUALITY ALERT IN EFFECT UNTIL 1 PM MDT THURSDAY... 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 the Bighorn Basin, Owl Creek and Bridger Mountains, and the Wind River Basin. * WHEN...Through 1 PM Thursday, August 21. * IMPACTS...Smoke from various wildfires across the region, including the Red Canyon Fire, will continue to spread across the region today and overnight tonight. 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/. $$