Weather Alert in Virginia
Flood Advisory issued July 9 at 8:16PM EDT until July 9 at 11:15PM EDT by NWS Wakefield VA
AREAS AFFECTED: Chesterfield, VA; Dinwiddie, VA; Prince George, VA; City of Colonial Heights, VA; City of Hopewell, VA; City of Petersburg, VA
DESCRIPTION: * WHAT...Urban and small stream flooding caused by excessive rainfall is expected. * WHERE...Portions of central and south central Virginia, including the following counties and independent cities, in central Virginia, Chesterfield and City of Colonial Heights. In south central Virginia, City of Hopewell, City of Petersburg, Dinwiddie and Prince George. * WHEN...Until 1115 PM EDT. * IMPACTS...Minor flooding in low-lying and poor drainage areas. Ponding of water in urban or other areas is occurring or is imminent. * ADDITIONAL DETAILS... - At 816 PM EDT, Doppler radar indicated heavy rain due to thunderstorms. This will cause urban and small stream flooding. Up to 0.5 inches of rain have fallen. - Additional rainfall amounts of 0.5 to 1 inch are expected over the area. This additional rain will result in minor flooding. - Some locations that will experience flooding include... Petersburg, Hopewell, Colonial Heights, Fort Gregg-Adams, Virginia State University, Chester, Prince George, Ettrick, Matoaca, Petersburg National Battlefield, Richard Bland College, New Bohemia, Birchett Estate and Jordan Point Country Club. - http://www.weather.gov/safety/flood
INSTRUCTION: Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles.
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Weather Topic: What are Shelf Clouds?
Home - Education - Cloud Types - Shelf Clouds
Next Topic: Sleet
A shelf cloud is similar to a wall cloud, but forms at the front
of a storm cloud, instead of at the rear, where wall clouds form.
A shelf cloud is caused by a series of events set into motion by the advancing
storm; first, cool air settles along the ground where precipitation has just fallen.
As the cool air is brought in, the warmer air is displaced, and rises above it,
because it is less dense. When the warmer air reaches the bottom of the storm cloud,
it begins to cool again, and the resulting condensation is a visible shelf cloud.
Next Topic: Sleet
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
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