Weather Alert in Arizona
Dust Storm Warning issued August 25 at 5:39PM MST until August 25 at 6:45PM MST by NWS Phoenix AZ
AREAS AFFECTED: Maricopa, AZ
DESCRIPTION: The National Weather Service in Phoenix has issued a * Dust Storm Warning for... Maricopa County in south central Arizona... * Until 645 PM MST. * At 538 PM MST, a wall of dust was along a line extending from Camelback Mountain to Downtown Phoenix to South Mountain Park, moving west at 25 mph. HAZARD...Near zero visibility with strong wind in excess of 50 mph. SOURCE...Doppler radar. IMPACT...Dangerous life-threatening travel. * This includes the following highways... AZ Interstate 10 between mile markers 119 and 147. AZ Interstate 17 between mile markers 195 and 218. AZ Route 51 between mile markers 1 and 10. Locations impacted include... Phoenix, Glendale, Peoria, Surprise, Avondale, Goodyear, Buckeye, El Mirage, Paradise Valley, Tolleson, Youngtown, Sun City West, Waddell, Laveen, and Cashion.
INSTRUCTION: Dust storms lead to dangerous driving conditions with visibility reduced to near zero. If driving, avoid dust storms if possible. If caught in one, pull off the road, turn off your lights and keep your foot off the brake.
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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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