Weather Alert in Iowa
Flood Warning issued July 16 at 10:44AM CDT until July 17 at 4:30PM CDT by NWS Quad Cities IA IL
AREAS AFFECTED: Benton, IA; Iowa, IA
DESCRIPTION: ...The Flood Warning is extended for the following rivers in Iowa... Iowa River at Marengo affecting Iowa and Benton Counties. ...The Flood Warning is cancelled for the following rivers in Illinois...Iowa... Mississippi River at Burlington affecting Des Moines, Henderson, Hancock and Lee Counties. Mississippi River at Gladstone LD18 affecting Des Moines and Henderson Counties. * WHAT...Minor flooding is occurring. * WHERE...Iowa River at Marengo. * WHEN...Until tomorrow afternoon. * IMPACTS...At 16.0 feet, Flood Stage. Water affects agricultural land along the river. Water is several feet deep in places. * ADDITIONAL DETAILS... - At 10:00 AM CDT Wednesday the stage was 15.5 feet. - Recent Activity...The river is near crest now. - Forecast...The river is expected to fall below flood stage tomorrow morning and continue falling to 10.6 feet Wednesday, July 23. - Flood stage is 15.0 feet.
INSTRUCTION: Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Motorists should not attempt to drive around barricades or drive cars through flooded areas. The next statement will be issued by this morning at 1145 AM CDT.
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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
Weather Topic: What is Snow?
Home - Education - Precipitation - Snow
Next Topic: Stratocumulus Clouds
Snow is precipitation taking the form of ice crystals. Each ice crystal, or snowflake,
has unique characteristics, but all of them grow in a hexagonal structure.
Snowfall can last for sustained periods of time and result in significant buildup
of snow on the ground.
On the earth's surface, snow starts out light and powdery, but as it begins to melt
it tends to become more granular, producing small bits of ice which have the consistency of
sand. After several cycles of melting and freezing, snow can become very dense
and ice-like, commonly known as snow pack.
Next Topic: Stratocumulus Clouds
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