Weather Alert in Colorado
Air Quality Alert issued September 4 at 4:10PM MDT by NWS Denver CO
AREAS AFFECTED: Jefferson, CO; Douglas, CO; Arapahoe, CO; Weld, CO; Broomfield, CO; Boulder, CO; Larimer, CO; Denver, CO; Adams, CO
DESCRIPTION: The Colorado Department of Public Health and Environment has issued the following... WHAT...Action Day for Multiple Pollutants. WHERE...Douglas, Jefferson, Denver, western Arapahoe, western Adams, Broomfield, Boulder, Larimer, and Weld Counties WHEN...400 PM Thursday September 04 to 400 PM Friday September 05 IMPACTS...Action Day for Multiple Pollutants is now in effect for the Front Range Urban Corridor. Hot, dry weather combined with out-of-state wildfire smoke will allow ozone and fine particulate concentrations to reach the Unhealthy for Sensitive Groups category at times both Thursday and Friday. For Colorado air quality conditions, forecasts, and advisories, visit: https://www.colorado.gov/airquality/colorado_summary.aspx If possible, please help us reduce pollution by limiting driving gas and diesel-powered vehicles until at least 4 PM Friday, September 5, 2025. HEALTH INFORMATION...If smoke is thick or becomes thick in your neighborhood you may want to remain indoors. This is especially true for those with heart disease, respiratory illnesses, the very young, and older adults. Consider limiting outdoor activity when moderate to heavy smoke is present. Consider relocating temporarily if smoke is present indoors and is making you ill. If visibility is less than 5 miles in smoke in your neighborhood, smoke has reached levels that are unhealthy.
INSTRUCTION: N/A
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Weather Topic: What are Cirrocumulus Clouds?
Home - Education - Cloud Types - Cirrocumulus Clouds
Next Topic: Cirrostratus Clouds
Cirrocumulus clouds form at high altitudes (usually around 5 km)
and have distinguishing characteristics displayed in a fine layer of
small cloud patches. These small cloud patches are sometimes referred to as
"cloudlets" in relation to the whole cloud formation.
Cirrocumulus clouds are formed from ice crystals and water droplets. Often, the
water droplets in the cloud freeze into ice crystals and the cloud becomes a
cirrostratus cloud. Because of this common occurrence, cirrocumulus cloud
formations generally pass rapidly.
Next Topic: Cirrostratus Clouds
Weather Topic: What are Cirrus Clouds?
Home - Education - Cloud Types - Cirrus Clouds
Next Topic: Condensation
Cirrus clouds are high-level clouds that occur above 20,000 feet
and are composed mainly of ice crystals.
They are thin and wispy in appearance.
What do they indicate?
They are often the first sign of an approaching storm.
Next Topic: Condensation
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