Weather Alert in Nebraska
Winter Storm Watch issued February 18 at 1:49AM CST until February 20 at 12:00AM CST by NWS Hastings NE
AREAS AFFECTED: Valley; Greeley; Sherman; Howard
DESCRIPTION: ...NARROW BAND OF HEAVY SNOW BECOMING INCREASINGLY LIKELY ON THURSDAY FOR PORTIONS OF CENTRAL NEBRASKA... * WHAT...Heavy snow possible. Total snow accumulations between 3 and 5 inches possible, with isolated amounts as high as 6 to 7 inches. Winds could gust as high as 40 mph. * WHERE...Greeley, Howard, Sherman, and Valley Counties. * WHEN...From Thursday morning through Thursday evening. * IMPACTS...Travel could be very difficult. The hazardous conditions could impact the Thursday morning and evening commutes. Gusty winds could lead to areas of blowing and drifting snow and reduced visibility. * ADDITIONAL DETAILS...A narrow band of moderate to heavy snow is forecast to develop Thursday morning and continue through the daytime hours, and perhaps into the evening. The area of heavy snow may be only 40 to 60 miles wide from north to south, so even slight shifts in storm track could lead to big changes in observed snowfall.
INSTRUCTION: Monitor the latest forecasts for updates on this situation.
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Weather Topic: What are Wall Clouds?
Home - Education - Cloud Types - Wall Clouds
Next Topic: Altocumulus Clouds
A wall cloud forms underneath the base of a cumulonimbus cloud,
and can be a hotbed for deadly tornadoes.
Wall clouds are formed by air flowing into the cumulonimbus clouds, which can
result in the wall cloud descending from the base of the cumulonimbus cloud, or
rising fractus clouds which join to the base of the storm cloud as the wall cloud
takes shape.
Wall clouds can be very large, and in the Northern Hemisphere they generally
form at the southern edge of cumulonimbus clouds.
Next Topic: Altocumulus Clouds
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
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