Weather Alert in Iowa
Flood Watch issued July 30 at 8:47PM CDT until August 2 at 7:00AM CDT by NWS Des Moines IA
AREAS AFFECTED: Black Hawk
DESCRIPTION: ...The Flood Watch continues for the following rivers in Iowa... Cedar River at Waterloo affecting Black Hawk county. ...The Flood Watch is cancelled for the following rivers in Iowa... Iowa River at Marshalltown affecting Marshall County. Iowa River near Rowan affecting Franklin and Wright Counties. Black Hawk Creek at Hudson affecting Black Hawk county. * WHAT...Flooding is possible. * WHERE...The Cedar River at Waterloo, or from the Waterloo-Cedar Falls city limits to Spring Creek near La Porte City. * WHEN...From late Friday night to Saturday morning. * IMPACTS...At 13.0 feet, Many storm sewers are closed along Black Hawk Creek and the Cedar River. The Fletcher Ave levee gates are closed. * ADDITIONAL DETAILS... - At 8:00 PM CDT Wednesday the stage was 10.7 feet. - Forecast...Flood stage may be reached early Saturday morning. - Flood stage is 13.0 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 Hole Punch Clouds?
Home - Education - Cloud Types - Hole Punch Clouds
Next Topic: Mammatus Clouds
A hole punch cloud is an unusual occurrence when a disk-shaped
hole appears in a cirrostratus, cirrocumulus, or altocumulus cloud.
When part of the cloud forms ice crystals, water droplets in the surrounding area
of the cloud evaporate. The effect of this process produces a large elliptical
gap in the cloud. The hole punch cloud formation is rare, but it is not specific
to any geographic area.
Other names which have been used to describe this phenomena include fallstreak hole,
skypunch, and cloud hole.
Next Topic: Mammatus Clouds
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
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