Weather Alert in Colorado
Air Quality Alert issued July 11 at 4:10PM MDT by NWS Grand Junction CO
AREAS AFFECTED: Gunnison, CO; Dolores, CO; La Plata, CO; Hinsdale, CO; San Juan, CO; Delta, CO; Ouray, CO; Archuleta, CO; Mesa, CO; Montrose, CO; San Miguel, CO; Montezuma, CO
DESCRIPTION: The Colorado Department of Public Health and Environment has issued the following... WHAT...Air Quality Health Advisory for Wildfire Smoke. WHERE...Saguache, San Juan, Hinsdale, Mineral, Archuleta, Mesa, Delta, Gunnison, Montrose, Ouray, San Miguel, Dolores, Montezuma, La Plata, Rio Grande and Conejos Counties. Locations include, but are not limited to Saguache, Silverton, Lake City, Creede, Pagosa Springs, Delta, Gunnison, Montrose, Nucla, Ouray, Telluride, Dove Creek, Cortez, Durango, Hermosa, Honeyville, Rockwood, Del Norte, South Fork and Conejos. WHEN...900 AM Friday July 11 to 900 AM Saturday July 12 IMPACTS...Multiple wildfires across the region will produce moderate to heavy smoke through at least early Saturday morning. HEALTH INFORMATION...Public Health Recommendations: 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 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
Weather Topic: What are Contrails?
Home - Education - Cloud Types - Contrails
Next Topic: Cumulonimbus Clouds
A contrail is an artificial cloud, created by the passing of an
aircraft.
Contrails form because water vapor in the exhaust of aircraft engines is suspended
in the air under certain temperatures and humidity conditions. These contrails
are called exhaust contrails.
Another type of contrail can form due to a temporary reduction in air pressure
moving over the plane's surface, causing condensation.
These are called aerodynamic contrails.
When you can see your breath on a cold day, it is also because of condensation.
The reason contrails last longer than the condensation from your breath is
because the water in contrails freezes into ice particles.
Next Topic: Cumulonimbus Clouds
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