Weather Alert in California
Winter Storm Watch issued February 13 at 11:06AM PST until February 18 at 10:00PM PST by NWS Reno NV
AREAS AFFECTED: Lassen-Eastern Plumas-Eastern Sierra Counties
DESCRIPTION: * WHAT...Heavy snow. Snow accumulations 6 to 12 inches west of Highway 395, with local high elevation totals west of Highway 89 up to 2 feet. This includes locations such as Plumas Eureka, Graeagle, Portola, and Lake Davis. For valley locations along and east of Highway 395, 2 to 6 inches, including Susanville, Janesville, Standish, and Doyle. Wind gusts 35 to 45 mph with up to 65 mph for wind prone locations along US-395. * WHERE...Lassen-Eastern Plumas-Eastern Sierra Counties. * WHEN...From Sunday evening through Wednesday evening. * IMPACTS...Travel could be very difficult to impossible. The hazardous conditions could impact the morning and evening commutes. * ADDITIONAL DETAILS...Elevations below 5000 feet will initially start as rain, changing to snow Monday afternoon into evening for all elevations.
INSTRUCTION: Monitor the latest forecasts for updates on this situation. Persons should consider delaying all travel. Motorists should use extreme caution if travel is absolutely necessary.
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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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