Weather Alert in Colorado

Recent Locations: Denver International Airport, CO  

Red Flag Warning issued April 24 at 2:04AM MDT until April 25 at 8:00PM MDT by NWS Grand Junction CO

AREAS AFFECTED: Lower Colorado River; Colorado River Headwaters

DESCRIPTION: ...FIRE WEATHER WATCH IN EFFECT FROM SATURDAY AFTERNOON THROUGH SATURDAY EVENING FOR GUSTY WINDS, LOW RELATIVE HUMIDITY AND DRY FUELS FOR FIRE WEATHER ZONES 203 AND 205 BELOW 7000 FEET... The National Weather Service in Grand Junction has issued a Red Flag Warning below 7000 feet for gusty winds, low relative humidity and dry fuels, which is in effect from noon to 8 PM MDT Friday. A Fire Weather Watch has also been issued. This Fire Weather Watch below 7000 feet for gusty winds, low relative humidity and dry fuels is in effect from Saturday afternoon through Saturday evening. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...In Colorado, Fire Weather Zone 203 Lower Colorado River and Fire Weather Zone 205 Colorado River Headwaters below 7000 feet. * TIMING...For the Red Flag Warning, from noon to 8 PM MDT Friday. For the Fire Weather Watch, from Saturday afternoon through Saturday evening. * WINDS...South 15 to 25 mph with gusts up to 40 mph. * RELATIVE HUMIDITY...8 to 13 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. A Fire Weather Watch means that critical fire weather conditions are forecast to occur. Listen for later forecasts and possible Red Flag Warnings.

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Weather Topic: What are Wall Clouds?

Home - Education - Cloud Types - Wall Clouds

Wall Clouds Next Topic: Altocumulus Clouds

A wall cloud forms underneath the base of a cumulonimbus cloud, and can be a hotbed for deadly tornadoes.

Wall clouds are formed by air flowing into the cumulonimbus clouds, which can result in the wall cloud descending from the base of the cumulonimbus cloud, or rising fractus clouds which join to the base of the storm cloud as the wall cloud takes shape.

Wall clouds can be very large, and in the Northern Hemisphere they generally form at the southern edge of cumulonimbus clouds.

Next Topic: Altocumulus Clouds

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

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