Weather Alert in Illinois
Flood Warning issued August 19 at 7:35PM CDT until August 20 at 2:00PM CDT by NWS Chicago IL
AREAS AFFECTED: Will, IL
DESCRIPTION: ...The Flood Warning is extended for the following rivers in Illinois... East Branch Du Page River at Bolingbrook affecting Will and DuPage Counties. Du Page River at Shorewood affecting Will County. For the East Branch Du Page River...including Bolingbrook...Minor flooding is forecast. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Du Page River from IL-59 in Plainfield downstream to confluence with Des Plaines River, including the Shorewood gauge. * WHEN...Until early tomorrow afternoon. * IMPACTS...At 16.0 feet, Clark Drive threatened in Shorewood. * ADDITIONAL DETAILS... - At 6:45 PM CDT Tuesday the stage was 15.9 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 6:45 PM CDT Tuesday was 15.9 feet. - Forecast...The river is expected to fall below flood stage tomorrow morning and continue falling to 11.2 feet Tuesday, August 26. - Flood stage is 15.5 feet. - http://www.weather.gov/safety/flood
INSTRUCTION: A Flood Warning means water levels above flood stage are imminent or may already be occurring. Persons along rivers and streams in the warned area should take immediate precautions to protect life and property. These forecasts are based on observed precipitation as well as forecast precipitation 24 hours into the future. Changes to the rainfall forecast, or any additional rainfall after 24 hours, may cause changes to these river forecasts. Additional information is available at www.weather.gov. The next statement will be issued by Wednesday morning.
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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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