Weather Alert in California
Dust Advisory issued August 25 at 3:10PM PDT until August 25 at 4:15PM PDT by NWS Phoenix AZ
AREAS AFFECTED: Imperial, CA
DESCRIPTION: The National Weather Service in Phoenix has issued a * Dust Advisory for... Southwestern Imperial County in southeastern California... * Until 415 PM PDT. * At 309 PM PDT, a wall of dust was along a line extending from near Calexico to near El Centro Naval Airfield to Plaster City. HAZARD...Less than one mile visibility with strong wind in excess of 50 mph. SOURCE...Doppler radar. IMPACT...Hazardous travel. * This includes the following highways... CA Interstate 8 near mile marker 1, and between mile markers 3 and 60. CA Route 111 between mile markers 1 and 19. CA Route 86 between mile markers 1 and 17. Locations impacted include... El Centro, Calexico, Imperial, Plaster City, Ocotillo, Holtville, Mt. Signal, El Centro Naval Airfield, Coyote Wells, Seeley, Bonds Corner, Heber, and Dixieland.
INSTRUCTION: Blowing dust brings reduced visibility, leading to dangerous driving conditions. If driving, avoid blowing dust if possible. If caught in dense blowing dust, pull off the road, turn off your lights and keep your foot off the brake. Motorists should not drive into an area of blowing dust. PULL ASIDE STAY ALIVE! Strong to severe thunderstorms are also possible behind this wall of dust. Keep updated with this quickly evolving situation.
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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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