Weather Alert in Illinois
Flood Watch issued August 12 at 11:33AM CDT until August 13 at 12:00AM CDT by NWS Chicago IL
AREAS AFFECTED: DuPage; Northern Cook; Central Cook; Southern Cook; Northern Will; Southern Will; Eastern Will; Lake
DESCRIPTION: * WHAT...Flash flooding caused by excessive rainfall is possible. * WHERE...Portions of northeast Illinois, including the following areas, Central Cook, DuPage, Eastern Will, Northern Cook, Northern Will, Southern Cook and Southern Will and northwest Indiana, including the following area, Lake IN. * WHEN...Through this evening. * IMPACTS...Creeks and streams may rise out of their banks. Flooding may occur in poor drainage and urban areas. Underpasses may be flooded. Roads and streets may be flooded. * ADDITIONAL DETAILS... - Showers and thunderstorms are possible this afternoon and evening. Atmospheric conditions are favorable for rainfall rates up to 1-2 inches per hour. In addition to increased runoff potential due to urban land cover in the Chicago Metropolitan Area, near surface soil moisture in some areas is elevated due to recent rainfall. - http://www.weather.gov/safety/flood
INSTRUCTION: A Flood Watch for flash flooding means rapid-onset flooding is possible, but not yet certain, based upon the latest forecasts. Flash flooding is a dangerous situation. Persons with interests along area rivers, creeks, and other waterways should monitor the latest forecasts and be prepared to take action should flooding develop.
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Weather Topic: What is Freezing Rain?
Home - Education - Precipitation - Freezing Rain
Next Topic: Graupel
Freezing rain is a condition where precipitation which has fallen in the form of
water droplets reaches temperatures which are below freezing and freezes upon
coming into contact
with surface objects. The result of this precipitation is a glaze of ice which
can be damaging to plants and man-made structures. A severe onset of freezing
rain which results in a very thick glaze of ice is known as an ice storm.
Next Topic: Graupel
Weather Topic: What is Hail?
Home - Education - Precipitation - Hail
Next Topic: Hole Punch Clouds
Hail is a form of precipitation which is recognized by large solid balls or
clumps of ice. Hail is created by thunderstorm clouds with strong updrafts of wind.
As the hailstones remain in the updraft, ice is deposited onto them until their
weight becomes heavy enough for them to fall to the earth's surface.
Hail storms can cause significant damage to crops, aircrafts, and man-made structures,
despite the fact that the duration is usually less than ten minutes.
Next Topic: Hole Punch Clouds
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