Weather Alert in Colorado

Recent Locations: Denver, CO  
Current Alerts for Denver, CO: Heat Advisory

Red Flag Warning issued June 19 at 1:40PM MDT until June 21 at 12:00AM MDT by NWS Grand Junction CO

AREAS AFFECTED: Northern San Juan; Gunnison Basin

DESCRIPTION: The National Weather Service in Grand Junction has issued a Red Flag Warning for gusty winds, low relative humidity and dry fuels, which is in effect from 9 AM Saturday to midnight MDT Saturday night. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...In Colorado, Fire Weather Zone 291 Northern San Juan Forecast Area and Fire Weather Zone 293 Gunnison Basin Forecast Area. * TIMING...For the first Red Flag Warning, from 9 AM Friday to midnight MDT Friday night. For the second Red Flag Warning, from 9 AM Saturday to midnight MDT Saturday night. * WINDS...Southwest 20 to 30 mph with gusts up to 50 mph. * RELATIVE HUMIDITY...9 to 14 percent. * IMPACTS...Fires will catch and spread quickly. Exercise extreme caution with any outdoor burning.

INSTRUCTION: A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior.

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Weather Topic: What are Altostratus Clouds?

Home - Education - Cloud Types - Altostratus Clouds

Altostratus Clouds Next Topic: Cirrocumulus Clouds

Altostratus clouds form at mid to high-level altitudes (between 2 and 7 km) and are created by a warm, stable air mass which causes water vapor to condense as it rise through the atmosphere. Usually altostratus clouds are featureless sheets characterized by a uniform color.

In some cases, wind punching through the cloud formation may give it a waved appearance, called altostratus undulatus. Altostratus clouds are commonly seen with other cloud formations accompanying them.

Next Topic: Cirrocumulus Clouds

Weather Topic: What are Cirrostratus Clouds?

Home - Education - Cloud Types - Cirrostratus Clouds

Cirrostratus Clouds Next Topic: Cirrus Clouds

Cirrostratus clouds are high, thin clouds that form above 20,000 feet and are made mostly of ice crystals. They sometimes look like giant feathers, horse tails, or curls of hair in the sky. These clouds are pushed by the jet stream and can move at high speeds reaching 100 mph.

What do they indicate?
They indicate that a precipitation is likely within 24 hours.

Next Topic: Cirrus Clouds

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