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 Mammatus Clouds?
Home - Education - Cloud Types - Mammatus Clouds
Next Topic: Nimbostratus Clouds
A mammatus cloud is a cloud with a unique feature which resembles
a web of pouches hanging along the base of the cloud.
In the United States, mammatus clouds tend to form in the warmer months, commonly
in the Midwest and eastern regions.
While they usually form at the bottom of a cumulonimbis cloud, they can also form
under altostratus, altocumulus, stratocumulus, and cirrus clouds. Mammatus clouds
warn that severe weather is close.
Next Topic: Nimbostratus Clouds
Weather Topic: What is Precipitation?
Home - Education - Precipitation - Precipitation
Next Topic: Rain
Precipitation can refer to many different forms of water that
may fall from clouds. Precipitation occurs after a cloud has become saturated to
the point where its water particles are more dense than the air below the cloud.
In most cases, precipitation will reach the ground, but it is not uncommon for
precipitation to evaporate before it reaches the earth's surface.
When precipitation evaporates before it contacts the ground it is called Virga.
Graupel, hail, sleet, rain, drizzle, and snow are forms of precipitation, but fog
and mist are not considered precipitation because the water vapor which
constitutes them isn't dense enough to fall to the ground.
Next Topic: Rain
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