Weather Alert in Arizona
Dust Storm Warning issued August 25 at 4:25PM MST until August 25 at 5:00PM MST by NWS Tucson AZ
AREAS AFFECTED: Pima, AZ; Pinal, AZ
DESCRIPTION: At 425 PM MST, an area of blowing dust was located 7 miles east of Chui-Chu, moving northwest at 40 mph. HAZARD...Less than a quarter mile visibility with strong winds in excess of 50 mph. SOURCE...Public reported. IMPACT...Dangerous life-threatening travel. Locations impacted include... Marana, Eloy, Avra Valley, Picacho, Chui-Chu, Picacho Peak State Park, Pinal Airpark, Red Rock, Cockleburr, North Komelik, Kohatk, Jack Rabbit, Shopishk, East Chui-Chu and Dove Mountain. This includes the following highways... Route 87 between mile markers 116 and 123. Interstate 10 between mile markers 206 and 237.
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 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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