Weather Alert in Iowa
Special Weather Statement issued March 3 at 10:20PM CST by NWS Sioux Falls SD
AREAS AFFECTED: Lyon; Osceola; Dickinson; Sioux; O'Brien; Clay; Lincoln; Lyon; Murray; Cottonwood; Nobles; Jackson; Pipestone; Rock; Kingsbury; Brookings; Sanborn; Miner; Lake; Moody; Aurora; Davison; Hanson; McCook; Minnehaha; Charles Mix; Douglas; Hutchinson; Turner; Lincoln; Bon Homme; Yankton; Clay; Union
DESCRIPTION: Visibilities have begun to fall across portions of southeast South Dakota, southwest Minnesota, and northwest Iowa late this evening as fog begins to develop. Visibilities down to a mile or less have been reported in various locations. If you will be on the road tonight, please remember to use caution as quickly dropping visibilities will result in impacted travel. Make sure to reduce your speed, increase your following distance, and use your low- beam lights if you encounter fog on the road.
INSTRUCTION: N/A
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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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