Weather Alert in South Carolina
Flood Warning issued August 14 at 4:19AM EDT until August 18 at 9:30AM EDT by NWS Columbia SC
AREAS AFFECTED: Calhoun, SC; Richland, SC
DESCRIPTION: ...The Flood Warning continues 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, Richland and Lexington 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 morning. * 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 4:00 AM EDT Thursday the stage was 17.1 feet. - Bankfull stage is 14.0 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 4:00 AM EDT Thursday was 17.1 feet. - Forecast...The river is expected to fall below flood stage late Sunday morning and continue falling to 11.3 feet Monday evening. - Flood stage is 15.0 feet. - http://www.weather.gov/safety/flood
INSTRUCTION: Caution is urged when walking near riverbanks. Residents and those with interests near the river should monitor rising water levels and take action if necessary. Additional information is available at www.weather.gov. The next statement will be issued this afternoon at 430 PM EDT.
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Weather Topic: What are Wall Clouds?
Home - Education - Cloud Types - Wall Clouds
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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.
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Weather Topic: What are Altostratus Clouds?
Home - Education - Cloud Types - Altostratus Clouds
Next Topic: Cirrocumulus Clouds
Altostratus clouds form at mid to high-level altitudes
(between 2 and 7 km) and are created by a warm, stable air mass which causes
water vapor
to condense as it rise through the atmosphere. Usually altostratus clouds are
featureless sheets characterized by a uniform color.
In some cases, wind punching through the cloud formation may give it a waved
appearance, called altostratus undulatus. Altostratus clouds
are commonly seen with other cloud formations accompanying them.
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