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Hazy skies and more hot weather

Air quality warning in effect for Denver and the Front Range
July 20 2021 5:15am forecast
Posted at 5:26 AM, Jul 20, 2021
and last updated 2021-07-21 01:23:20-04

The mid-July weather pattern is pretty stagnant across Colorado: Hot and hazy days for Denver, the Front Range and eastern plains, with a better chance for thunderstorms for the mountains and western valleys.

Scattered thunderstorms will stay mainly over the mountains as a minor "monsoon flow" has developed over the southwestern United States. The risk for severe weather is low, but locally heavy rainfall may cause local flooding, especially near burn scars.

The Denver metro area will see slightly better chance for some thunderstorms Wednesday afternoon, but the rest of the workweek will be hazy, hot and generally dry.

Wildfire smoke will continue to bring a milky haze to our skies, especially across eastern Colorado. In addition, hot temperatures will combine with low level air pollution to create ozone. An Ozone Action Alert Day is in effect for Denver and the I-25 Corridor. Be sure to limit time outdoors if you have breathing or pulmonary issues.

Highs will be in the low to mid-90s for Denver and the plains, as well as Grand Junction and Montrose. In the mountains, afternoon temperatures will be in the upper 70s to mid 80s, except cooler during thunderstorms.

Nighttime temperatures will be pretty comfortable, with lows in the lower 60s for Denver and the plains and in the 40s to low 50s in the mountains.

Late on Friday, a weak cold front will push across Colorado and bring slight cooling and a better chance for afternoon thunderstorms for Saturday and Sunday.

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