Weather Alert in Iowa
Flood Watch issued June 26 at 10:09AM CDT until July 2 at 2:30PM CDT by NWS Des Moines IA
AREAS AFFECTED: Polk
DESCRIPTION: ...The National Weather Service in Des Moines IA has issued a Flood Watch for the following rivers in Iowa... Cedar River at Cedar Falls affecting Black Hawk county. Cedar River at Waterloo affecting Black Hawk county. Winnebago River at Mason City affecting Cerro Gordo, Worth and Floyd counties. Shell Rock River at Shell Rock affecting Bremer, Black Hawk and Butler counties. Raccoon River at Des Moines Fleur Dr affecting Polk County. North Raccoon River near Perry affecting Dallas County. * WHAT...Flooding is possible. * WHERE...The Raccoon River at Des Moines Fleur Dr, or from Walnut Creek to the Des Moines River. * WHEN...From late Saturday night to early Wednesday afternoon. * IMPACTS...At 13.3 feet, SW 30th St is closed from George Flagg Parkway to Bell Ave. George Flagg Parkway is closed from SW 30th St to SW 28th St. * ADDITIONAL DETAILS... - At 9:47 AM CDT Thursday the stage was 9.0 feet. - Forecast...Flood stage may be reached early Sunday morning. - Flood stage is 12.0 feet.
INSTRUCTION: For the latest waterway observations and forecasts refer to weather.gov/desmoines/water. River forecasts include observed precipitation plus forecast precipitation over the next 24 hours.
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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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