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 are Contrails?
Home - Education - Cloud Types - Contrails
Next Topic: Cumulonimbus Clouds
A contrail is an artificial cloud, created by the passing of an
aircraft.
Contrails form because water vapor in the exhaust of aircraft engines is suspended
in the air under certain temperatures and humidity conditions. These contrails
are called exhaust contrails.
Another type of contrail can form due to a temporary reduction in air pressure
moving over the plane's surface, causing condensation.
These are called aerodynamic contrails.
When you can see your breath on a cold day, it is also because of condensation.
The reason contrails last longer than the condensation from your breath is
because the water in contrails freezes into ice particles.
Next Topic: Cumulonimbus Clouds
Weather Topic: What are Cumulus Clouds?
Home - Education - Cloud Types - Cumulus Clouds
Next Topic: Drizzle
Cumulus clouds are fluffy and textured with rounded tops, and
may have flat bottoms. The border of a cumulus cloud
is clearly defined, and can have the appearance of cotton or cauliflower.
Cumulus clouds form at low altitudes (rarely above 2 km) but can grow very tall,
becoming cumulus congestus and possibly the even taller cumulonimbus clouds.
When cumulus clouds become taller, they have a greater chance of producing precipitation.
Next Topic: Drizzle
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