Weather Alert in Arizona
Special Weather Statement issued August 21 at 8:11PM MST by NWS Phoenix AZ
AREAS AFFECTED: Tonopah Desert; Gila Bend; Buckeye/Avondale; Central Phoenix; East Valley; Fountain Hills/East Mesa; South Mountain/Ahwatukee; Southeast Valley/Queen Creek; Northwest Pinal County; West Pinal County; Apache Junction/Gold Canyon; Pinal/Superstition Mountains; Sonoran Desert Natl Monument
DESCRIPTION: At 808 PM MST, radar indicated several clusters of thunderstorms moving through northern Pinal and southwest Maricopa Counties. Conditions will continue to remain favorable for the development of additional thunderstorms. Some storms may become strong to severe. Winds in excess of 40 mph will be possible. Strong, gusty winds will be capable of producing areas of blowing dust with reduced visibilities. Locations impacted include... Mesa, Chandler, Gilbert, Tempe, Avondale, Goodyear, Buckeye, Casa Grande, Apache Junction, Coolidge, Gila Bend, East Mesa, Gold Canyon, Sun Lakes, Maricopa, Queen Creek, Estrella, Arizona City, Gold Camp, and South Phoenix. This includes the following highways... AZ Interstate 10 between mile markers 152 and 204. AZ Interstate 8 between mile markers 96 and 178. US Highway 60 between mile markers 173 and 209. Frequent cloud to ground lightning is occurring with this storm. Lightning can strike 10 miles away from a thunderstorm. Seek a safe shelter inside a building or vehicle.
INSTRUCTION: N/A
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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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