Weather Alert in Pennsylvania
Flood Watch issued February 19 at 11:02AM EST until February 20 at 1:00PM EST by NWS State College PA
AREAS AFFECTED: Cambria; Blair; Huntingdon; Somerset; Bedford; Fulton
DESCRIPTION: * WHAT...Flooding caused by ice jams is possible. * WHERE...A portion of central Pennsylvania, including the following counties, Bedford, Blair, Cambria, Fulton, Huntingdon and Somerset. * WHEN...Through Friday afternoon. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. * ADDITIONAL DETAILS... - Significant ice breakup on area rivers and creeks has been observed over the last few days as a result of an extended stretch of mild temperatures. Multiple rounds of heavy rain and embedded thunderstorms this afternoon and overnight could produce 1-1.5" of rain in the watch area. This heavy rainfall combined with snowmelt will produce increased streamflows and an elevated risk of ice jam flooding. - http://www.weather.gov/safety/flood
INSTRUCTION: You should monitor later forecasts and be alert for possible Flood Warnings. Those living in areas prone to flooding should be prepared to take action should flooding develop.
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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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