Weather Alert in Arizona
Dust Advisory issued September 2 at 7:03PM MST until September 2 at 8:00PM MST by NWS Phoenix AZ
AREAS AFFECTED: Maricopa, AZ; Pinal, AZ
DESCRIPTION: The National Weather Service in Phoenix has issued a * Dust Advisory for... Maricopa County in south central Arizona... Pinal County in southeastern Arizona... * Until 800 PM MST. * At 703 PM MST, a dust channel was over Tumbleweed Park, or near Chandler, moving east at 15 mph. HAZARD...Less than two miles visibility with strong wind in excess of 30 mph. SOURCE...Doppler radar. IMPACT...Hazardous travel. * This includes the following highways... AZ Interstate 10 between mile markers 155 and 177. US Highway 60 between mile markers 173 and 198. AZ Route 87 between mile markers 150 and 172. Locations impacted include... Mesa, Chandler, Gilbert, Tempe, Apache Junction, Sun Lakes, Queen Creek, San Tan Village Mall, Seville, Freestone Park, Bapchule, Fiesta Mall, Phoenix Mesa Gateway Airport, San Tan Mountain Park, and Chandler Heights.
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!
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Weather Topic: What is Graupel?
Home - Education - Precipitation - Graupel
Next Topic: Hail
Graupel is a form of precipitation that is created by atmospheric conditions
which cause supercooled water droplets to contact snow crystals and freeze to
their surface.
Sometimes known as soft hail or snow pellets, graupel is delicate and easily
destroyed by touch. Whereas hail usually falls during severe weather, graupel
doesn't require such conditions to form, and can form in mild precipitation
similar to situations which produce snowfall.
Next Topic: Hail
Weather Topic: What are Hole Punch Clouds?
Home - Education - Cloud Types - Hole Punch Clouds
Next Topic: Mammatus Clouds
A hole punch cloud is an unusual occurrence when a disk-shaped
hole appears in a cirrostratus, cirrocumulus, or altocumulus cloud.
When part of the cloud forms ice crystals, water droplets in the surrounding area
of the cloud evaporate. The effect of this process produces a large elliptical
gap in the cloud. The hole punch cloud formation is rare, but it is not specific
to any geographic area.
Other names which have been used to describe this phenomena include fallstreak hole,
skypunch, and cloud hole.
Next Topic: Mammatus Clouds
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