Weather Alert in Arizona
Dust Storm Warning issued September 4 at 6:32PM MST until September 4 at 7:30PM MST by NWS Phoenix AZ
AREAS AFFECTED: Yuma, AZ
DESCRIPTION: The National Weather Service in Phoenix has issued a * Dust Storm Warning for... Central Yuma County in southwestern Arizona... * Until 730 PM MST. * At 631 PM MST, a wall of dust was along a line extending from 10 miles north of Wellton to 8 miles southwest of Tacna to 19 miles southwest of Mohawk, moving west at 30 mph. HAZARD...Less than a quarter mile visibility with strong wind in excess of 40 mph. SOURCE...Trained weather spotters. IMPACT...Dangerous life-threatening travel. * This includes the following highways... AZ Interstate 8 between mile markers 6 and 45. AZ Route 95 between mile markers 29 and 42. AZ Route 195 between mile markers 23 and 26. Locations impacted include... Yuma, Fortuna Foothills, Wellton, Blaisdell, Tacna, Kinter, Ligurta, Araby, and Roll.
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. Motorists should not drive into a dust storm. PULL ASIDE STAY ALIVE!
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Weather Topic: What are Mammatus Clouds?
Home - Education - Cloud Types - Mammatus Clouds
Next Topic: Nimbostratus Clouds
A mammatus cloud is a cloud with a unique feature which resembles
a web of pouches hanging along the base of the cloud.
In the United States, mammatus clouds tend to form in the warmer months, commonly
in the Midwest and eastern regions.
While they usually form at the bottom of a cumulonimbis cloud, they can also form
under altostratus, altocumulus, stratocumulus, and cirrus clouds. Mammatus clouds
warn that severe weather is close.
Next Topic: Nimbostratus Clouds
Weather Topic: What is Precipitation?
Home - Education - Precipitation - Precipitation
Next Topic: Rain
Precipitation can refer to many different forms of water that
may fall from clouds. Precipitation occurs after a cloud has become saturated to
the point where its water particles are more dense than the air below the cloud.
In most cases, precipitation will reach the ground, but it is not uncommon for
precipitation to evaporate before it reaches the earth's surface.
When precipitation evaporates before it contacts the ground it is called Virga.
Graupel, hail, sleet, rain, drizzle, and snow are forms of precipitation, but fog
and mist are not considered precipitation because the water vapor which
constitutes them isn't dense enough to fall to the ground.
Next Topic: Rain
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