Weather Alert in California

Recent Locations: San Fernando, CA  

Winter Weather Advisory issued April 25 at 1:22AM PDT until April 27 at 11:00AM PDT by NWS Reno NV

AREAS AFFECTED: Greater Lake Tahoe Area; Greater Lake Tahoe Area

DESCRIPTION: * WHAT...Snow. Snow accumulations of 3 to 6 inches above 7000 feet with up to 10 inches along the highest peaks. 1 to 3 inches at lake level. Ridge winds gusts up to 60 mph. * WHERE...Greater Lake Tahoe Area. * WHEN...From 5 PM this afternoon to 11 AM PDT Sunday. * IMPACTS...Travel could be difficult at times. The hazardous conditions could impact the Friday evening commute and weekend travel, especially across Sierra passes. * ADDITIONAL DETAILS...Heaviest snowfall expected Friday night and Saturday morning. Snow will struggle to accumulate on roadways during the daytime hours, though isolated heavy snow showers may bring greater accumulations Saturday afternoon.

INSTRUCTION: Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1.

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Current U.S. National Radar--Current

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North America Water Vapor (Moisture)

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Weather Topic: What is Graupel?

Home - Education - Precipitation - Graupel

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

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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