Active Weather Alerts
Air Quality Alert
Issued: 10:11 PM Jun. 16, 2025 – National Weather Service
...OZONE ACTION DAY ALERT FROM 400 PM MONDAY UNTIL 1200 AM TUESDAY... The Colorado Department of Public Health and Environment has issued the following... WHAT...Ozone Action Day Alert. WHERE...Douglas, Jefferson, Denver, western Arapahoe, western Adams, Broomfield, Boulder, Larimer, and Weld Counties WHEN...400 PM Monday June 16 to 1200 AM Tuesday June 17 IMPACTS...Ozone Action Day Alert is now in effect for the Front Range Urban Corridor. Hot and stagnant weather conditions will allow ozone concentrations to reach the Unhealthy for Sensitive Groups category Monday afternoon and evening in southern and western portions of the Denver metro area, including the nearby foothills. Ozone levels will improve to the Good to Moderate range on Tuesday. For Colorado air quality conditions, forecasts, and advisories, visit: https://www.colorado.gov/airquality/colorado_summary.aspx If possible, please help us reduce ozone pollution by limiting driving gas and diesel-powered vehicles until midnight, Monday night, June 16, 2025. Colorado is also addressing ozone pollution through state policies. For more information about health impacts and how ozone pollution forms in Colorado, visit: https://cdphe.colorado.gov/ozone- pollution-and-your-health HEALTH INFORMATION...Increasing likelihood of respiratory symptoms and breathing discomfort in active children and adults and people with lung disease, such as asthma. Active children and adults, and people with lung disease, such as asthma, should reduce prolonged or heavy outdoor exertion.
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