Weather Alert in Iowa
Flood Warning issued August 19 at 7:59PM CDT until August 23 at 9:34AM CDT by NWS Des Moines IA
AREAS AFFECTED: Black Hawk, IA
DESCRIPTION: ...The Flood Warning continues for the following rivers in Iowa... Cedar River at Cedar Falls affecting Black Hawk County. Shell Rock River at Shell Rock affecting Bremer, Black Hawk and Butler Counties. ...The Flood Warning is extended for the following rivers in Iowa... Winnebago River at Mason City affecting Worth, Floyd and Cerro Gordo Counties. * WHAT...Minor flooding is forecast. * WHERE...The Cedar River at Cedar Falls, or from the West Fork Cedar River to the Cedar Falls-Waterloo city limits. * WHEN...From Wednesday afternoon to late Saturday morning. * IMPACTS...At 91.0 feet, Water affects Big Woods Rd south of Dunkerton Rd as well as the north parking lot of Island Park. * ADDITIONAL DETAILS... - At 6:45 PM CDT Tuesday the stage was 85.3 feet. - Forecast...The river is expected to rise above flood stage tomorrow afternoon to a crest of 90.7 feet Thursday evening. It will then fall below flood stage early Saturday morning. - Flood stage is 89.0 feet.
INSTRUCTION: For the latest stream observations and forecasts refer to weather.gov/desmoines/water. Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. 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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