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More flash flooding possible near Colorado's burn scars

Another day of 90s in Denver tomorrow
Flash Flood Watch
Posted at 5:10 AM, Jul 21, 2021
and last updated 2021-07-21 19:49:50-04

Our streak of 90-degree temperatures continues across the Denver metro area. It will be another hot and mainly hazy week, but today will be our best chance of storms across the eastern plains.

There will be a much better chance of storms and scattered showers in mountains and across the western valleys.

A minor "monsoon flow" has developed over the southwestern United States. The risk for severe weather is low, but locally heavy rainfall may cause flooding, especially near burn scars.

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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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