Weather Alert in South Carolina
Flood Advisory issued August 14 at 11:12AM EDT until August 17 at 8:00AM EDT by NWS Columbia SC
AREAS AFFECTED: Lexington, SC; Richland, SC
DESCRIPTION: ...The Flood Advisory is extended for the following rivers in South Carolina... Congaree River At Congaree River at Columbia affecting Lexington and Richland Counties. * WHAT...Flooding caused by excessive rainfall continues. * WHERE...Congaree River at Congaree River at Columbia. * WHEN...Until Sunday morning. * IMPACTS...At 10.0 feet, Flooding occurs in flood prone areas near and downstream from Columbia. Flooding also occurs on parts of the Cayce and West Columbia river walk. At 13.0 feet, Flooding occurs in flood prone areas near and downstream from Columbia. Flooding also occurs over much of the Cayce and West Columbia river walk. * ADDITIONAL DETAILS... - At 11:00 AM EDT Thursday the stage was 11.9 feet. - Bankfull stage is 19.0 feet. - Forecast...The river is expected to fall to 6.2 feet Tuesday morning. - Action stage is 10.0 feet. - Flood stage is 19.0 feet. - http://www.weather.gov/safety/flood
INSTRUCTION: Caution is urged when walking near riverbanks. Additional information is available at www.weather.gov. The next statement will be issued this evening at 1115 PM EDT.
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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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