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/.