Weather Alert in Pennsylvania
Winter Storm Watch issued February 20 at 1:40PM EST until February 23 at 1:00PM EST by NWS State College PA
AREAS AFFECTED: Dauphin; Schuylkill; Lebanon; Adams; York; Lancaster
DESCRIPTION: * WHAT...Heavy snow possible. Total snow accumulations between 4 and 6 inches possible. * WHERE...A portion of central Pennsylvania. * WHEN...From late Saturday night through Monday afternoon. * IMPACTS...Travel could be very difficult. The hazardous conditions could impact the Monday morning commute. * ADDITIONAL DETAILS...There is still some uncertainty regarding the track of this storm. Any westward shifts in the track may result in higher snowfall amounts.
INSTRUCTION: Monitor the latest forecasts for updates on this situation.
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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 are Stratocumulus Clouds?
Home - Education - Cloud Types - Stratocumulus Clouds
Next Topic: Stratus Clouds
Stratocumulus clouds are similar to altocumulus clouds in their
fluffy appearance, but have a slightly darker shade due to their additional mass.
A good way to distinguish the two cloud types is to hold your hand out and measure
the size of an individual cloud; if it is the size of your thumb it is generally
an altocumulus cloud, if it is the size of your hand it is generally a
stratocumulus cloud.
It is uncommon for stratocumulus clouds to produce precipitation, but if they do
it is usually a light rain or snow.
Next Topic: Stratus Clouds
Weather Topic: What are Wall Clouds?
Home - Education - Cloud Types - Wall Clouds
Next Topic: Altocumulus Clouds
A wall cloud forms underneath the base of a cumulonimbus cloud,
and can be a hotbed for deadly tornadoes.
Wall clouds are formed by air flowing into the cumulonimbus clouds, which can
result in the wall cloud descending from the base of the cumulonimbus cloud, or
rising fractus clouds which join to the base of the storm cloud as the wall cloud
takes shape.
Wall clouds can be very large, and in the Northern Hemisphere they generally
form at the southern edge of cumulonimbus clouds.
Next Topic: Altocumulus Clouds
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