Weather Alert in Pennsylvania
Winter Storm Watch issued February 21 at 2:10AM EST until February 24 at 1:00AM EST by NWS Pittsburgh PA
AREAS AFFECTED: Westmoreland Ridges; Fayette Ridges; Ridges of Eastern Monongalia and Northwestern Preston; Preston; Eastern Preston; Western Tucker; Eastern Tucker
DESCRIPTION: * WHAT...An extended period of snow for high terrain. More than 6 inches of snow is favored for Sunday through Monday. * WHERE...Portions of southwest Pennsylvania and northern West Virginia. * WHEN...From late tonight through late Monday night. * IMPACTS...Travel could be very difficult. The hazardous conditions could impact the Monday morning and evening commutes. * ADDITIONAL DETAILS...Highest accumulations are most likely for grassy surfaces in the high terrain. Snow totals may vary largely from valleys to ridgetops. Snow most likely to stick to roads and sidewalks Sunday night.
INSTRUCTION: Monitor the latest forecasts for updates on this situation.
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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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