Weather Alert in Illinois
Flood Warning issued August 19 at 7:35PM CDT until August 20 at 7:51AM CDT by NWS Chicago IL
AREAS AFFECTED: DuPage, IL; 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...East Branch Du Page River from Maple Avenue in Lisle downstream to confluence with West Branch DuPage River, including the Bolingbrook gauge. * WHEN...Until tomorrow morning. * IMPACTS...At 20.0 feet, DuPage River Greenway Trail is threatened east of the river near Royce Road in Bolingbrook. Trails threatened at Green Valley Forest Preserve near Woodridge. * ADDITIONAL DETAILS... - At 6:40 PM CDT Tuesday the stage was 20.5 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 6:40 PM CDT Tuesday was 20.5 feet. - Forecast...The river is expected to fall below flood stage just after midnight tonight and continue falling to 15.2 feet Tuesday, August 26. - Flood stage is 20.0 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 Mammatus Clouds?
Home - Education - Cloud Types - Mammatus Clouds
Next Topic: Nimbostratus Clouds
A mammatus cloud is a cloud with a unique feature which resembles
a web of pouches hanging along the base of the cloud.
In the United States, mammatus clouds tend to form in the warmer months, commonly
in the Midwest and eastern regions.
While they usually form at the bottom of a cumulonimbis cloud, they can also form
under altostratus, altocumulus, stratocumulus, and cirrus clouds. Mammatus clouds
warn that severe weather is close.
Next Topic: Nimbostratus Clouds
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
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