Weather Alert in California
Cold Weather Advisory issued February 19 at 12:16PM PST until February 20 at 9:00AM PST by NWS Sacramento CA
AREAS AFFECTED: Shasta Lake Area / Northern Shasta County; Burney Basin / Eastern Shasta County; Mountains Southwestern Shasta County to Western Colusa County; Northeast Foothills/Sacramento Valley; Motherlode; Western Plumas County/Lassen Park; West Slope Northern Sierra Nevada
DESCRIPTION: * WHAT...Sub-freezing temperatures in the single digits to teens in the mountains with 20s to around 30 degrees in the foothills. * WHERE...Burney Basin / Eastern Shasta County, Motherlode, Mountains Southwestern Shasta County to Western Colusa County, Northeast Foothills, Shasta Lake Area / Northern Shasta County, West Slope Northern Sierra Nevada, and Western Plumas County/Lassen Park. * WHEN...From midnight tonight to 9 AM PST Friday. * IMPACTS...Very cold temperatures can lead to frostbite and hypothermia with prolonged exposure. This will especially impact those without power from the storm.
INSTRUCTION: Use caution while traveling outside. Wear appropriate clothing, a hat, and gloves. If using a generator, please exercise safety. Keep pets indoors as much as possible. Make sure outdoor animals have a warm, dry shelter, food, and unfrozen water.
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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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