Weather Alert in South Carolina
Flood Warning issued August 14 at 11:12AM EDT until August 18 at 10:24PM EDT by NWS Columbia SC
AREAS AFFECTED: Calhoun, SC; Richland, SC
DESCRIPTION: ...The Flood Warning is extended for the following rivers in South Carolina... Congaree River At Congaree River at Congaree NP Near Gadsden affecting Calhoun and Richland Counties. Congaree River At Carolina Eastman affecting Calhoun, Lexington and Richland Counties. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Congaree River at Congaree River at Congaree NP Near Gadsden. * WHEN...Until late Monday evening. * IMPACTS...At 15.0 feet, Flooding begins in the Congaree National Park. This will begin to produce flooding of portions of the lower boardwalk. At 17.0 feet, The access road to the Sandy Run subdivision becomes flooded. The lower boardwalk in the Congaree National Park becomes flooded by Cedar Creek. At 18.0 feet, Several homes in the Sandy Run subdivision along the river become flooded. At 18 feet the river covers the Weston Lake overlook in the Congaree National Park. Between 18 and 18.5 feet the river begins to cover sections of the elevated boardwalk. * ADDITIONAL DETAILS... - At 10:00 AM EDT Thursday the stage was 17.2 feet. - Bankfull stage is 14.0 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 10:00 AM EDT Thursday was 17.2 feet. - Forecast...The river is expected to fall below flood stage late Sunday evening and continue falling to 12.2 feet Tuesday morning. - Flood stage is 15.0 feet. - http://www.weather.gov/safety/flood
INSTRUCTION: Residents and those with interests near the river should monitor rising water levels and take action if necessary. Caution is urged when walking near riverbanks. Additional information is available at www.weather.gov. The next statement will be issued this evening at 1100 PM EDT.
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Weather Topic: What is Precipitation?
Home - Education - Precipitation - Precipitation
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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.
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Weather Topic: What are Shelf Clouds?
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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.
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