Denver woke up early Monday, June 29, to mostly clear skies and comfortable temperatures in the low 60s. That calm start will not last long. Forecasters expect the afternoon high to climb to around 90°F, with patchy smoke sliding into the metro by mid to late afternoon. Strengthening southwest winds will arrive through the day, with gusts into the 20s and haze that could knock down visibility near the foothills.
Afternoon Heat And Smoke
Patchy smoke is likely after about 2 p.m., and near-surface haze is expected to worsen tonight and into Tuesday morning as smoke from western fires drifts over the Front Range. People with asthma, COPD or heart conditions are advised to limit outdoor activity during smoky periods and keep medication close at hand. The state health department has posted an Air Quality Health Advisory for the Front Range Urban Corridor, according to CDPHE.
Winds And Fire Weather
Gusty southwest-to-west winds will spread across the foothills and higher terrain, with gusts this afternoon reaching into the low 20s and stronger gusts Tuesday that could reach the mid 20s. The National Weather Service in Boulder has issued a Red Flag Warning for parts of the mountains this afternoon and a Fire Weather Watch for Tuesday afternoon into the evening. Elevated to critical fire weather conditions are expected through Friday in the high country, according to NWS Denver/Boulder.
What This Means For Your Afternoon
Outdoor events and afternoon commutes could bring hazy skies, reduced visibility and stronger cross-winds near the foothills, so it is smart to plan a little extra time and consider moving strenuous activity indoors. Keep windows closed and set air conditioners to recirculate when possible; portable air purifiers can help if you have them. If you notice heavy smoke or start to experience breathing trouble, seek cleaner indoor air and follow local guidance.
Looking Ahead
The National Weather Service forecast calls for Tuesday, June 30, to top out near 94°F, with highs holding in the low 90s through much of the week. Little overall moisture is expected, so dry, smoky afternoons are likely to continue, although a chance of isolated afternoon showers and thunderstorms returns Sunday, July 5. Anyone making holiday plans should monitor local advisories and check the NWS and state health pages for updates.
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