Weather Alert in Pennsylvania
Flood Warning issued February 21 at 1:15PM EST until February 21 at 4:15PM EST by NWS Pittsburgh PA
AREAS AFFECTED: Armstrong, PA
DESCRIPTION: * WHAT...Flooding caused by an ice jam is expected. * WHERE...Northern Armstrong County in west central Pennsylvania... * WHEN...Until 415 PM EST. * IMPACTS...Flooding of rivers, creeks, streams, and other low-lying and flood-prone locations is imminent or occurring. Depending on ice behavior, any release of the ice jam could result in sudden rises of water, leading to a rapid flooding situation. * ADDITIONAL DETAILS... - At 113 PM EST, emergency management reported an ice jam near the warned area. Flooding is occurring at campgrounds along the Allegheny riverbank, and additional flooding is possible if the ice jam breaks. - Some locations that will experience flooding include... Templeton. - http://www.weather.gov/safety/flood
INSTRUCTION: Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Be aware of your surroundings and do not drive on flooded roads. Flooding is occurring or is imminent. It is important to know where you are relative to streams, rivers, or creeks which can become killers in heavy rains. Campers and hikers should avoid streams or creeks.
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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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