Weather Alert in South Dakota
Flood Warning issued June 27 at 9:28PM CDT until June 28 at 1:00PM 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... Big Sioux River 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 forecast. * WHERE...Big Sioux River near Watertown. * WHEN...From late tonight to early tomorrow afternoon. * IMPACTS...At 9.0 feet, The lowest banks are overtopped and minimal areas of pasture land will be flooded * ADDITIONAL DETAILS... - At 9:00 PM CDT Friday the stage was 9.8 feet. - Forecast...The river is expected to rise to a crest of 10.0 feet just after midnight tonight. It will then fall below flood stage tomorrow morning. - 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. Motorists should not attempt to drive around barricades or drive cars through flooded areas. 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 is Rain?
Home - Education - Precipitation - Rain
Next Topic: Shelf Clouds
Precipitation in the form of water droplets is called rain.
Rain generally has a tendency to fall with less intensity over a greater period
of time, and when rainfall is more severe it is usually less sustained.
Rain is the most common form of precipitation and happens with greater frequency
depending on the season and regional influences. Cities have been shown to have
an observable effect on rainfall, due to an effect called the urban heat island.
Compared to upwind, monthly rainfall between twenty and forty miles downwind of
cities is 30% greater.
Next Topic: Shelf Clouds
Weather Topic: What is Sleet?
Home - Education - Precipitation - Sleet
Next Topic: Snow
Sleet is a form of precipitation in which small ice pellets are the primary
components. These ice pellets are smaller and more translucent than hailstones,
and harder than graupel. Sleet is caused by specific atmospheric conditions and
therefore typically doesn't last for extended periods of time.
The condition which leads to sleet formation requires a warmer body of air to be
wedged in between two sub-freezing bodies of air. When snow falls through a warmer
layer of air it melts, and as it falls through the next sub-freezing body of air
it freezes again, forming ice pellets known as sleet. In some cases, water
droplets don't have time to freeze before reaching the surface and the result is
freezing rain.
Next Topic: Snow
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