Weather Alert in Iowa
Flood Warning issued July 11 at 8:58PM CDT until July 18 at 4:12AM CDT by NWS Quad Cities IA IL
AREAS AFFECTED: Benton, IA; Iowa, IA
DESCRIPTION: ...The National Weather Service in Quad Cities IA IL has issued a Flood Warning for the following rivers in Iowa... Iowa River at Marengo affecting Iowa and Benton Counties. * WHAT...Minor flooding is forecast. * WHERE...Iowa River at Marengo. * WHEN...From Saturday afternoon to Friday, July 18. * IMPACTS...At 17.0 feet, Moderate Flood Stage. Extensive inundation of agricultural land. * ADDITIONAL DETAILS... - At 8:00 PM CDT Friday the stage was 11.6 feet. - Forecast...The river will rise above flood stage tomorrow afternoon to 15.1 feet tomorrow evening. It will then fall to flood stage early Sunday morning. It will rise to 16.9 feet early Monday afternoon. It will then fall below flood stage Thursday evening. - Flood stage is 15.0 feet.
INSTRUCTION: Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. The next statement will be issued Saturday evening at 900 PM CDT.
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Weather Topic: What is Precipitation?
Home - Education - Precipitation - Precipitation
Next Topic: Rain
Precipitation can refer to many different forms of water that
may fall from clouds. Precipitation occurs after a cloud has become saturated to
the point where its water particles are more dense than the air below the cloud.
In most cases, precipitation will reach the ground, but it is not uncommon for
precipitation to evaporate before it reaches the earth's surface.
When precipitation evaporates before it contacts the ground it is called Virga.
Graupel, hail, sleet, rain, drizzle, and snow are forms of precipitation, but fog
and mist are not considered precipitation because the water vapor which
constitutes them isn't dense enough to fall to the ground.
Next Topic: Rain
Weather Topic: What are Shelf Clouds?
Home - Education - Cloud Types - Shelf Clouds
Next Topic: Sleet
A shelf cloud is similar to a wall cloud, but forms at the front
of a storm cloud, instead of at the rear, where wall clouds form.
A shelf cloud is caused by a series of events set into motion by the advancing
storm; first, cool air settles along the ground where precipitation has just fallen.
As the cool air is brought in, the warmer air is displaced, and rises above it,
because it is less dense. When the warmer air reaches the bottom of the storm cloud,
it begins to cool again, and the resulting condensation is a visible shelf cloud.
Next Topic: Sleet
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