Weather Alert in South Dakota
Severe Thunderstorm Warning issued August 22 at 12:22AM CDT until August 22 at 1:00AM CDT by NWS Sioux Falls SD
AREAS AFFECTED: Beadle, SD; Kingsbury, SD; Miner, SD
DESCRIPTION: SVRFSD The National Weather Service in Sioux Falls has issued a * Severe Thunderstorm Warning for... Southwestern Kingsbury County in east central South Dakota... Southeastern Beadle County in east central South Dakota... Northern Miner County in east central South Dakota... * Until 100 AM CDT. * At 1222 AM CDT, a severe thunderstorm was located 7 miles north of Carthage, or 15 miles west of Lake Thompson State Recreation Area, moving southeast at 25 mph. HAZARD...Half dollar size hail. SOURCE...Radar indicated. IMPACT...Damage to vehicles is expected. * This severe thunderstorm will be near... Carthage around 1225 AM CDT.
INSTRUCTION: For your protection move to an interior room on the lowest floor of a building. Torrential rainfall is occurring with this storm, and may lead to flash flooding. Do not drive your vehicle through flooded roadways.
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Weather Topic: What are Shelf Clouds?
Home - Education - Cloud Types - Shelf Clouds
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.
Next Topic: Sleet
Weather Topic: What is Snow?
Home - Education - Precipitation - Snow
Next Topic: Stratocumulus Clouds
Snow is precipitation taking the form of ice crystals. Each ice crystal, or snowflake,
has unique characteristics, but all of them grow in a hexagonal structure.
Snowfall can last for sustained periods of time and result in significant buildup
of snow on the ground.
On the earth's surface, snow starts out light and powdery, but as it begins to melt
it tends to become more granular, producing small bits of ice which have the consistency of
sand. After several cycles of melting and freezing, snow can become very dense
and ice-like, commonly known as snow pack.
Next Topic: Stratocumulus Clouds
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