Weather Alert in Nebraska
Winter Weather Advisory issued February 18 at 11:53AM CST until February 20 at 12:00AM CST by NWS Hastings NE
AREAS AFFECTED: Nance; Merrick; Polk
DESCRIPTION: ...WINTER RETURNS WITH ACCUMULATING SNOW AND GUSTY WINDS ON THURSDAY... * WHAT...Snow expected. Total snow accumulations between 2 and 4 inches. Northwest winds 20 to 25 mph, gusting 30 to 40 mph. * WHERE...Merrick, Nance, and Polk Counties. * WHEN...From 6 AM Thursday to midnight CST Thursday Night. * IMPACTS...Plan on slippery road conditions. 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: 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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Weather Topic: What is Rain?
Home - Education - Precipitation - Rain
Next Topic: Shelf Clouds
Precipitation in the form of water droplets is called rain.
Rain generally has a tendency to fall with less intensity over a greater period
of time, and when rainfall is more severe it is usually less sustained.
Rain is the most common form of precipitation and happens with greater frequency
depending on the season and regional influences. Cities have been shown to have
an observable effect on rainfall, due to an effect called the urban heat island.
Compared to upwind, monthly rainfall between twenty and forty miles downwind of
cities is 30% greater.
Next Topic: Shelf Clouds
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
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