Weather Alert in California
Fire Weather Watch issued May 21 at 11:41PM PDT until May 22 at 11:00PM PDT by NWS Hanford CA
AREAS AFFECTED: West Side Hills; San Joaquin Valley; Central Sierra Foothills; Southern Sierra Foothills
DESCRIPTION: * AFFECTED AREA...Fire weather zone 579 West Side Hills. Fire weather zone 580 San Joaquin Valley. Fire weather zone 590 Central Sierra Foothills. Fire weather zone 591 Southern Sierra Foothills. * WIND...West to Northwest winds 15 to 20 mph with gusts reaching 25 to 35 mph. Ridge-top wind gusts reaching 35 mph. * HUMIDITY...5 to 15 percent. * IMPACTS...Any fires that develop will likely spread rapidly. Outdoor burning is not recommended.
INSTRUCTION: A Fire Weather Watch means that critical fire weather conditions are forecast to occur. Listen for later forecasts and possible Red Flag Warnings.
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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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