Active Weather Alerts
Air Quality Alert
Issued: 10:11 PM Jun. 18, 2025 – National Weather Service
...OZONE ACTION DAY ALERT FROM 400 PM WEDNESDAY UNTIL 400 PM THURSDAY... 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 Wednesday June 18 to 400 PM Thursday June 19 IMPACTS...Ozone Action Day Alert is now in effect for the Front Range Urban Corridor. Ozone is expected to be in the Good to Moderate range on Wednesday. However, hot, sunny, and stagnant weather will allow ozone to reach the Unhealthy for Sensitive Groups category on Thursday. The highest ozone concentrations are expected in southern and western portions of the Denver Metro area, along the I-25 corridor towards Fort Collins, and Greeley. 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 at least 4 p.m. Thursday, June 19, 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.
Heat Advisory
Issued: 7:51 PM Jun. 18, 2025 – National Weather Service
...HEAT ADVISORY IN EFFECT FROM 11 AM FRIDAY TO 6 PM MDT SATURDAY... * WHAT...Temperatures around 100 degrees in the Denver metro and up to 103 across the eastern plains. * WHERE...Portions of east central, north central, and northeast Colorado including the Denver metro. * WHEN...Worst heat will be from 11 AM to 6 PM MDT Friday and Saturday. * IMPACTS...Hot temperatures may cause heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke. &&
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