Weather Alert in Arizona
Dust Storm Warning issued June 30 at 7:00PM MST until June 30 at 8:15PM MST by NWS Tucson AZ
AREAS AFFECTED: Pima, AZ; Santa Cruz, AZ
DESCRIPTION: The National Weather Service in Tucson has issued a * Dust Storm Warning for... Eastern Pima County in southeastern Arizona... Santa Cruz County in southeastern Arizona... * Until 815 PM MST. * At 700 PM MST, an area of blowing dust was moving across eastern Pima county including the city of Tucson, moving southwest at 20 mph. HAZARD...Less than a quarter mile visibility with damaging winds in excess of 60 mph. SOURCE...Detected by National Weather Service meteorologists. IMPACT...Dangerous life-threatening travel. * Locations impacted include... Tucson, Oro Valley, Marana, Sahuarita, Green Valley, Nogales, Tubac, Davis-Monthan Air Force Base, Casas Adobes, Drexel Heights, Rio Rico, Flowing Wells, Tanque Verde, Vail, Corona De Tucson, South Tucson, Three Points, Pascua Pueblo Yaqui Reservation, Tortolita and East Sahuarita. This includes the following highways... Interstate 19 between mile markers 1 and 63. Route 86 between mile markers 151 and 171. Route 77 between mile markers 70 and 80. Interstate 10 between mile markers 241 and 294. Route 82 between mile markers 1 and 43. Route 286 between mile markers 44 and 45. Route 83 between mile markers 10 and 58.
INSTRUCTION: Motorists should not drive into a dust storm. PULL ASIDE STAY ALIVE! 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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