Weather Alert in South Dakota
Winter Weather Advisory issued February 18 at 1:33AM MST until February 19 at 5:00PM MST by NWS Rapid City SD
AREAS AFFECTED: Rapid City; Custer Co Plains; Western Fall River; Northern Oglala Lakota; Bennett; Sturgis/Piedmont Foothills; Hermosa Foothills; Northeastern Crook
DESCRIPTION: * WHAT...Snow and patchy blowing snow expected. Total snow accumulations between 2 and 4 inches. Winds gusting as high as 40 mph. * WHERE...Portions of northwestern and southwestern South Dakota and northeast Wyoming. * WHEN...From 11 PM this evening to 5 PM MST Thursday. * IMPACTS...Plan on slippery road conditions. Mainly drifting snow is expected, but in areas prone to blowing snow, the snow may be lofted and briefly reduce visibility. The hazardous conditions could impact the Thursday morning and evening commutes.
INSTRUCTION: Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1.
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North America Water Vapor (Moisture)
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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
Weather Topic: What are Cirrostratus Clouds?
Home - Education - Cloud Types - Cirrostratus Clouds
Next Topic: Cirrus Clouds
Cirrostratus clouds are high, thin clouds that form above
20,000 feet and are made mostly of ice crystals. They sometimes look like giant
feathers, horse tails, or curls of hair in the sky.
These clouds are pushed by the jet stream and can move at high speeds reaching
100 mph.
What do they indicate?
They indicate that a precipitation is likely within 24 hours.
Next Topic: Cirrus Clouds
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