Weather Alert in Pennsylvania
Winter Storm Watch issued February 20 at 6:28PM 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 Saturday night through late Monday night. * IMPACTS...Travel could be very difficult. The hazardous conditions could impact the Monday morning commute. * 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 Snow?
Home - Education - Precipitation - Snow
Next Topic: Stratocumulus Clouds
Snow is precipitation taking the form of ice crystals. Each ice crystal, or snowflake,
has unique characteristics, but all of them grow in a hexagonal structure.
Snowfall can last for sustained periods of time and result in significant buildup
of snow on the ground.
On the earth's surface, snow starts out light and powdery, but as it begins to melt
it tends to become more granular, producing small bits of ice which have the consistency of
sand. After several cycles of melting and freezing, snow can become very dense
and ice-like, commonly known as snow pack.
Next Topic: Stratocumulus Clouds
Weather Topic: What are Stratus Clouds?
Home - Education - Cloud Types - Stratus Clouds
Next Topic: Wall Clouds
Stratus clouds are similar to altostratus clouds, but form at a
lower altitude and are identified by their fog-like appearance, lacking the
distinguishing features of most clouds.
Stratus clouds are wider than most clouds, and their base has a smooth, uniform
look which is lighter in color than a nimbostratus cloud.
The presence of a stratus cloud indicates the possibility of minor precipitation,
such as drizzle, but heavier precipitation does not typically arrive in the form
of a stratus cloud.
Next Topic: Wall Clouds
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