Weather Alert in Iowa
Flood Warning issued August 2 at 8:48PM CDT until August 8 at 9:00PM CDT by NWS Quad Cities IA IL
AREAS AFFECTED: Louisa, IA
DESCRIPTION: ...The Flood Warning is extended for the following rivers in Iowa... Cedar River near Conesville affecting Muscatine and Louisa Counties. Cedar River at Cedar Rapids affecting Linn County. Iowa River at Oakville affecting Louisa County. Iowa River at Wapello affecting Louisa County. ...The Flood Warning continues for the following rivers in Iowa... Iowa River at Marengo affecting Benton and Iowa Counties. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Iowa River at Wapello. * WHEN...Until late Friday evening. * IMPACTS...At 21.0 feet, Minor Flood Stage. Agricultural land near the river is flooded and water covers most islands. Water starts rising onto secondary roads in Wapello Bottoms. * ADDITIONAL DETAILS... - At 8:30 PM CDT Saturday the stage was 21.8 feet. - Forecast...The river is expected to rise to a crest of 21.9 feet Wednesday morning. It will then fall below flood stage early Friday afternoon. - Flood stage is 21.0 feet.
INSTRUCTION: Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Caution is urged when walking near riverbanks. The next statement will be issued bySunday evening at 900 PM 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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