Weather Alert in South Dakota
Flood Warning issued August 11 at 4:13PM CDT by NWS Aberdeen SD
AREAS AFFECTED: Brown, SD
DESCRIPTION: ...The Flood Warning continues for the following rivers in South Dakota... James River At Columbia affecting Brown 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 and minor flooding is forecast. * WHERE...James River at Columbia. * WHEN...Until further notice. * IMPACTS...At 15.0 feet, Significant amounts of agricultural lands are flooded. * ADDITIONAL DETAILS... - At 3:00 PM CDT Monday the stage was 13.4 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 3:00 PM CDT Monday was 13.4 feet. - Forecast...The river is expected to rise to a crest of 14.7 feet early Wednesday afternoon. - Flood stage is 13.0 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. Additional information is available at www.weather.gov/abr. The next statement will be issued by late Tuesday night at 1215 AM CDT.
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Weather Topic: What is Graupel?
Home - Education - Precipitation - Graupel
Next Topic: Hail
Graupel is a form of precipitation that is created by atmospheric conditions
which cause supercooled water droplets to contact snow crystals and freeze to
their surface.
Sometimes known as soft hail or snow pellets, graupel is delicate and easily
destroyed by touch. Whereas hail usually falls during severe weather, graupel
doesn't require such conditions to form, and can form in mild precipitation
similar to situations which produce snowfall.
Next Topic: Hail
Weather Topic: What are Hole Punch Clouds?
Home - Education - Cloud Types - Hole Punch Clouds
Next Topic: Mammatus Clouds
A hole punch cloud is an unusual occurrence when a disk-shaped
hole appears in a cirrostratus, cirrocumulus, or altocumulus cloud.
When part of the cloud forms ice crystals, water droplets in the surrounding area
of the cloud evaporate. The effect of this process produces a large elliptical
gap in the cloud. The hole punch cloud formation is rare, but it is not specific
to any geographic area.
Other names which have been used to describe this phenomena include fallstreak hole,
skypunch, and cloud hole.
Next Topic: Mammatus Clouds
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