Weather Alert in California
Winter Weather Advisory issued April 24 at 1:10PM PDT until April 27 at 11:00AM PDT by NWS Sacramento CA
AREAS AFFECTED: Western Plumas County/Lassen Park; West Slope Northern Sierra Nevada
DESCRIPTION: * WHAT...Snow expected above 6000 feet. Total snow accumulations of 3 to 6 inches, with up to 10 inches over highest peaks. Winds gusting up to 35 mph. * WHERE...West Slope Northern Sierra Nevada and Western Plumas County/Lassen Park. * WHEN...From 5 PM Friday to 11 AM PDT Sunday. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact the Friday evening commute and weekend travel.
INSTRUCTION: Check the latest road conditions from Caltrans online at quickmap.dot.ca.gov or dial 5 1 1.
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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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