Weather Alert in Arizona
Red Flag Warning issued June 19 at 4:04AM PDT until June 20 at 11:00PM PDT by NWS Las Vegas NV
AREAS AFFECTED: Lake Mead NRA/Colorado River-AZ side; Northwest Deserts/Northwest Plateau; Lincoln County/Ely Dispatch; Nye County Deserts/Las Vegas Dispatch; Clark and SW Lincoln County Deserts/Las Vegas Dispatch; Lake Mead NRA/Colorado River-NV side
DESCRIPTION: ...A Red Flag Warning is in effect from Thursday afternoon through Friday evening for windy conditions and low humidity... * AFFECTED AREA...In AZZ101...Fire weather zone 101.In AZZ102... Fire weather zone 102.In Nevada...Fire weather zones 461, 462, 465, and 466. * TIMING...This afternoon through Friday evening. * WIND...Sustained winds of 20-25 mph with gusts to 35 mph. * HUMIDITY...Below 10 percent. * IMPACTS...any fires that develop will likely spread rapidly. Outdoor burning is not recommended.
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 Wall Clouds?
Home - Education - Cloud Types - 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
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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