Weather Alert in South Dakota
Winter Storm Watch issued March 13 at 1:22PM CDT until March 16 at 1:00AM CDT by NWS Sioux Falls SD
AREAS AFFECTED: Brule; Aurora; Davison; Hanson; McCook; Douglas; Hutchinson
DESCRIPTION: * WHAT...Blizzard conditions possible. Total snow accumulations between 3 and 5 inches possible. Winds could gust as high as 60 mph. * WHERE...Portions of south central and southeast South Dakota. * WHEN...From Saturday evening through late Sunday night. * IMPACTS...Visibilities may drop below 1/2 mile due to falling and/or blowing snow at times. Travel could be very difficult. Whiteout conditions may make travel extremely dangerous or impossible. Strong winds could cause tree damage.
INSTRUCTION: Prepare for possible blizzard conditions. Continue to monitor the latest forecasts for updates on this situation.
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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
Weather Topic: What are Stratocumulus Clouds?
Home - Education - Cloud Types - Stratocumulus Clouds
Next Topic: Stratus Clouds
Stratocumulus clouds are similar to altocumulus clouds in their
fluffy appearance, but have a slightly darker shade due to their additional mass.
A good way to distinguish the two cloud types is to hold your hand out and measure
the size of an individual cloud; if it is the size of your thumb it is generally
an altocumulus cloud, if it is the size of your hand it is generally a
stratocumulus cloud.
It is uncommon for stratocumulus clouds to produce precipitation, but if they do
it is usually a light rain or snow.
Next Topic: Stratus Clouds
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