Weather Alert in Illinois
Flood Advisory issued August 11 at 11:36PM CDT until August 12 at 12:45AM CDT by NWS Chicago IL
AREAS AFFECTED: Cook, IL; DuPage, IL; Will, IL
DESCRIPTION: * WHAT...Flooding caused by excessive rainfall continues. * WHERE...A portion of northeast Illinois, including the following counties, Cook, DuPage and Will. * WHEN...Until 1245 AM CDT. * IMPACTS...Flooding is occurring in poor drainage and urban areas in portions of the advisory area. Some underpasses and streets will be flooded, especially on the north side of Chicago. * ADDITIONAL DETAILS... - At 1131 PM CDT, Trained weather spotters reported flooding in the advisory area, including street flooding in Lincoln Park and a flooded viaduct in Bucktown. Between 1.5 and 2.5 inches of rain have fallen. - The heaviest rainfall has ended but scattered thunderstorms may produce an additional quarter to half inch of rain in portions of the advisory area. - Some locations that will experience flooding include... Downtown Chicago, Naperville, Cicero, Bolingbrook, Oak Lawn, Berwyn, Wheaton, Oak Park, Downers Grove, Elmhurst, Lombard, Addison, Woodridge, Austin, Midway Airport, South Lawndale, Chicago Lawn, Irving Park, West Town and Bridgeport. - http://www.weather.gov/safety/flood
INSTRUCTION: A Flood Advisory means flooding along waterways and other poor drainage areas is imminent or may already be occurring. Persons in the advisory area should use caution and avoid flood waters. Be especially cautious at night when it is harder to recognize the dangers of flooding.
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Weather Topic: What is Snow?
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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.
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Weather Topic: What are Stratus Clouds?
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Stratus clouds are similar to altostratus clouds, but form at a
lower altitude and are identified by their fog-like appearance, lacking the
distinguishing features of most clouds.
Stratus clouds are wider than most clouds, and their base has a smooth, uniform
look which is lighter in color than a nimbostratus cloud.
The presence of a stratus cloud indicates the possibility of minor precipitation,
such as drizzle, but heavier precipitation does not typically arrive in the form
of a stratus cloud.
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