Denver, Colo. – Residents across the Denver metro and Front Range should brace for unhealthy air quality and isolated storm chances as summer heat peaks midweek. An Ozone Action Day Alert remains in effect through 4 p.m. Wednesday, with health officials urging drivers to limit gas and diesel-powered vehicle use to cut pollution.
According to the Colorado Department of Public Health and Environment, breezy weather on Tuesday kept air quality in the “Good to Moderate” range. By Wednesday, however, hot and stagnant conditions are expected to push ozone levels into the “Unhealthy for Sensitive Groups” category. That includes children, older adults, and anyone with asthma or lung disease, who should avoid prolonged outdoor exertion.
The National Weather Service in Boulder said isolated thunderstorms could develop Tuesday evening along the Palmer Divide and mountain foothills, producing gusty winds between 35 and 45 mph. Conditions turn hotter and drier Wednesday and Thursday before a cold front arrives Friday, bringing cooler air and a renewed risk of showers into the weekend.
Air quality alerts may be extended if ozone concentrations remain elevated. Residents are advised to plan for reduced visibility and potential health impacts through midweek.
Five Day Forecast for Denver, CO
- Wednesday: Sunny and hot, high near 95. Winds could gust up to 20 mph.
- Thursday: Mostly sunny, high near 98. Calm in morning, breezy afternoon.
- Friday: 40% chance of showers and thunderstorms after noon, high near 88.
- Saturday: Partly sunny with showers possible, high near 83.
- Sunday: Showers likely, mostly cloudy, high near 79.
