Weather Alert in Iowa
Flood Watch issued August 25 at 8:33AM CDT until August 30 at 7:00PM CDT by NWS Quad Cities IA IL
AREAS AFFECTED: Clinton; Scott
DESCRIPTION: ...The Flood Watch is extended for the following rivers in Iowa... Wapsipinicon River near De Witt 4S affecting Clinton and Scott Counties. * WHAT...Flooding is possible. * WHERE...Wapsipinicon River near De Witt 4S. * WHEN...From late Wednesday night to Saturday evening. * IMPACTS...At 11.5 feet, Moderate Flood Stage. Water affects homes along old U.S. Highway 61. * ADDITIONAL DETAILS... - At 7:30 AM CDT Monday the stage was 9.4 feet. - Forecast...Flood stage may be reached early Thursday morning. - Flood stage is 11.0 feet.
INSTRUCTION: If you are in the watch area, remain alert to possible flooding. The next statement will be issued by Tuesday morning at 845 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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