Weather Alert in Iowa
Winter Storm Watch issued March 13 at 11:54PM CDT until March 16 at 1:00AM CDT by NWS Omaha/Valley NE
AREAS AFFECTED: Monona; Harrison; Shelby; Pottawattamie; Knox; Cedar; Thurston; Antelope; Pierce; Wayne; Madison; Stanton; Cuming; Burt; Colfax; Dodge; Washington; Saunders; Douglas; Sarpy
DESCRIPTION: * WHAT...Blizzard conditions possible. Total snow accumulations between 1 and 3 inches possible. Winds could gust as high as 60 mph. * WHERE...Portions of southwest and west central Iowa and east central and northeast Nebraska. * WHEN...From Sunday morning through late Sunday night. * IMPACTS...Roads, and especially bridges and overpasses, will likely become slick and hazardous. Visibilities may drop below 1/4 mile due to falling and blowing snow. Whiteout conditions are possible and may make travel treacherous and potentially life-threatening.
INSTRUCTION: Prepare for possible blizzard conditions. Continue to monitor the latest forecasts for updates on this situation. Persons should consider delaying all travel. Motorists should use extreme caution if travel is absolutely necessary.
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Weather Topic: What are Nimbostratus Clouds?
Home - Education - Cloud Types - Nimbostratus Clouds
Next Topic: Precipitation
A nimbostratus cloud is similar to a stratus cloud in its formless,
smooth appearance. However, a nimbostratus cloud is darker than a stratus cloud,
because it is thicker.
Unlike a stratus cloud, a nimbostratus cloud typically brings with it the threat
of moderate to heavy precipitation. In some cases, the precipitation may evaporate
before reaching the ground, a phenomenon known as virga.
Next Topic: Precipitation
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
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