Weather Alert in Arizona
Dust Storm Warning issued August 25 at 6:51PM MST until August 25 at 7:15PM MST by NWS Flagstaff AZ
AREAS AFFECTED: Yavapai, AZ
DESCRIPTION: The National Weather Service in Flagstaff has issued a * Dust Storm Warning for... Yavapai County in west central Arizona... * Until 715 PM MST. * At 651 PM MST, an area of blowing dust was located over Black Canyon City, moving northwest at 15 mph. HAZARD...Less than a quarter mile visibility with strong winds in excess of 50 mph. SOURCE...Radar indicated. IMPACT...Dangerous life-threatening travel. * Locations impacted include... Black Canyon City, Sunset Point Rest Area, Horse Thief Basin, Coles Bay, Humbug Bay, Agua Fria National Monument, Castle Hot Springs, Goose Bay, Lake Pleasant, Castle Creek Boat Ramp, Cordes Lakes, Rock Springs, Bumble Bee, Castle Creek Wilderness, Humbug and Casa Rosa. This includes Interstate 17 between mile markers 242 and 258. This includes the following recreation areas and campgrounds... Black Canyon Campground.
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 is Sleet?
Home - Education - Precipitation - Sleet
Next Topic: Snow
Sleet is a form of precipitation in which small ice pellets are the primary
components. These ice pellets are smaller and more translucent than hailstones,
and harder than graupel. Sleet is caused by specific atmospheric conditions and
therefore typically doesn't last for extended periods of time.
The condition which leads to sleet formation requires a warmer body of air to be
wedged in between two sub-freezing bodies of air. When snow falls through a warmer
layer of air it melts, and as it falls through the next sub-freezing body of air
it freezes again, forming ice pellets known as sleet. In some cases, water
droplets don't have time to freeze before reaching the surface and the result is
freezing rain.
Next Topic: Snow
Weather Topic: What are Stratocumulus Clouds?
Home - Education - Cloud Types - Stratocumulus Clouds
Next Topic: Stratus Clouds
Stratocumulus clouds are similar to altocumulus clouds in their
fluffy appearance, but have a slightly darker shade due to their additional mass.
A good way to distinguish the two cloud types is to hold your hand out and measure
the size of an individual cloud; if it is the size of your thumb it is generally
an altocumulus cloud, if it is the size of your hand it is generally a
stratocumulus cloud.
It is uncommon for stratocumulus clouds to produce precipitation, but if they do
it is usually a light rain or snow.
Next Topic: Stratus Clouds
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