Weather Alert in Iowa
Special Weather Statement issued September 2 at 1:06PM CDT by NWS La Crosse WI
AREAS AFFECTED: Mitchell; Howard; Winneshiek; Floyd; Chickasaw; Winona; Fillmore; Houston; Buffalo; Trempealeau; La Crosse
DESCRIPTION: Funnel clouds may develop this afternoon across portions of northeast Iowa, southeast Minnesota, and west central Wisconsin. These funnel clouds normally do not touch the ground. As a result, they rarely do any damage and last only a few minutes. However, if you live in these areas...remain on the alert and be prepared to move to a place of safety if a funnel should approach the ground. Atmospheric conditions along a corridor roughly from Charles City IA to Galesville WI, including the cities of Decorah IA, Winona MN, Preston MN, and La Crosse WI and other nearby locations will continue to be favorable for the formation of short lived funnels during the next several hours.
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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