Weather Alert in South Dakota
Flood Warning issued August 22 at 5:00AM CDT by NWS Aberdeen SD
AREAS AFFECTED: Codington, SD
DESCRIPTION: ...The National Weather Service in Aberdeen SD has issued a Flood Warning for the following rivers in South Dakota... Willow Creek near Watertown affecting Codington County. .For sites with a river forecast, the forecast includes precipitation through the next 24 hours. Any future precipitation could affect the forecasts. * WHAT...Minor flooding is occurring. * WHERE...Willow Creek near Watertown. * WHEN...From early this morning until further notice. * ADDITIONAL DETAILS... - At 3:00 AM CDT Friday the stage was 12.7 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 3:00 AM CDT Friday was 12.8 feet. - Flood stage is 10.0 feet. - http://www.weather.gov/safety/flood
INSTRUCTION: Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Caution is urged when walking near riverbanks. Be especially cautious at night when it is harder to recognize the dangers of flooding. Additional information is available at www.weather.gov/abr. The next statement will be issued by Saturday afternoon at 100 PM CDT.
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Weather Topic: What are Wall Clouds?
Home - Education - Cloud Types - Wall Clouds
Next Topic: Altocumulus Clouds
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.
Next Topic: Altocumulus Clouds
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.
Next Topic: Cirrocumulus Clouds
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