Weather Alert in Arizona
Dust Advisory issued September 2 at 5:27PM MST until September 2 at 6:30PM MST by NWS Tucson AZ
AREAS AFFECTED: Pinal, AZ
DESCRIPTION: The National Weather Service in Tucson has issued a * Dust Advisory for... Central Pinal County in southeastern Arizona... * Until 630 PM MST. * At 527 PM MST, an area of blowing dust was located 11 miles northeast of Picacho Peak State Park, moving northeast at 10 mph. HAZARD...Less than three miles visibility. SOURCE...Detected by National Weather Service meteorologists. IMPACT...Hazardous travel. * Locations impacted include... Oracle, Eloy, Saddlebrooke Ranch, Kearny, Picacho, Chui-Chu, Picacho Peak State Park, Red Rock, Cactus Forest, Shopishk, Kelvin and East Chui-Chu. This includes the following highways... Route 79 between mile markers 95 and 128. Route 87 between mile markers 116 and 124. Route 77 between mile markers 97 and 111. Route 177 between mile markers 141 and 158. Interstate 10 between mile markers 205 and 229.
INSTRUCTION: Motorists should not drive into an area of blowing dust. PULL ASIDE STAY ALIVE!
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Weather Topic: What are Cirrus Clouds?
Home - Education - Cloud Types - Cirrus Clouds
Next Topic: Condensation
Cirrus clouds are high-level clouds that occur above 20,000 feet
and are composed mainly of ice crystals.
They are thin and wispy in appearance.
What do they indicate?
They are often the first sign of an approaching storm.
Next Topic: Condensation
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
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