Weather Alert in Pennsylvania
Winter Weather Advisory issued February 5 at 12:41PM EST until February 7 at 7:00AM EST by NWS State College PA
AREAS AFFECTED: Cambria; Somerset
DESCRIPTION: * WHAT...Snow expected. Total snow accumulations between 2 and 4 inches. Localized amounts up to 8 inches in the highest elevations. Winds gusting as high as 45 to 50 mph. * WHERE...Cambria and Somerset Counties. * WHEN...From 10 AM Friday to 7 AM EST Saturday. The heaviest snow is expected Friday afternoon through Friday night. * IMPACTS...Plan on slippery road conditions. The hazardous travel conditions could impact the Friday evening commute. Gusty winds could bring down tree branches and cause significant blowing and drifting snow. * ADDITIONAL DETAILS...Near-blizzard conditions with very low visibility are possible at times late Friday night into early Saturday morning and could make travel extremely difficult. The heaviest snowfall is expected along and to the west of Route 219.
INSTRUCTION: Persons should delay travel if possible. If travel is absolutely necessary, drive with extreme caution and be prepared for sudden changes in visibility. Make sure your vehicle is winterized and in good working order.
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Weather Topic: What are Mammatus Clouds?
Home - Education - Cloud Types - Mammatus Clouds
Next Topic: Nimbostratus Clouds
A mammatus cloud is a cloud with a unique feature which resembles
a web of pouches hanging along the base of the cloud.
In the United States, mammatus clouds tend to form in the warmer months, commonly
in the Midwest and eastern regions.
While they usually form at the bottom of a cumulonimbis cloud, they can also form
under altostratus, altocumulus, stratocumulus, and cirrus clouds. Mammatus clouds
warn that severe weather is close.
Next Topic: Nimbostratus Clouds
Weather Topic: What is Precipitation?
Home - Education - Precipitation - Precipitation
Next Topic: Rain
Precipitation can refer to many different forms of water that
may fall from clouds. Precipitation occurs after a cloud has become saturated to
the point where its water particles are more dense than the air below the cloud.
In most cases, precipitation will reach the ground, but it is not uncommon for
precipitation to evaporate before it reaches the earth's surface.
When precipitation evaporates before it contacts the ground it is called Virga.
Graupel, hail, sleet, rain, drizzle, and snow are forms of precipitation, but fog
and mist are not considered precipitation because the water vapor which
constitutes them isn't dense enough to fall to the ground.
Next Topic: Rain
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