Weather Alert in Illinois
Flood Warning issued August 19 at 2:33AM CDT until August 19 at 10:15AM CDT by NWS Chicago IL
AREAS AFFECTED: Cook, IL; Lake, IN
DESCRIPTION: * WHAT...Flooding caused by excessive rainfall continues. * WHERE...Portions of northeast Illinois, including the following county, Cook and northwest Indiana, including the following county, Lake IN. * WHEN...Until 1015 AM CDT Tuesday. * IMPACTS...Creeks, streams, and rivers are at bankfull or flood stage. Numerous roads are likely flooded and closed. Low-lying parking lots, intersections, and ditches are likely flooded. * ADDITIONAL DETAILS... - At 231 AM CDT, Doppler radar and automated gauge reports indicate that between 4 and 8 inches of rain has fallen in the past 12 hours. Additional showers and thunderstorms may drop up to an inch of additional rainfall over the coming hours. This will only delay the speed at which flood waters recede. - Some locations that will experience flooding include... Chicago, Hammond, Gary, Calumet City, East Chicago, Lansing, Highland, Munster, Dolton, South Holland, Griffith, South Deering, Lake Station, Lynwood, Glenwood, Whiting, East Side, Hegewisch, Riverdale and Burnham. - http://www.weather.gov/safety/flood
INSTRUCTION: A Flood Warning means flooding is imminent or may already be occurring. Persons along rivers, creeks, and other waterways should take immediate precautions to protect life and property.
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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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