Weather Alert in Illinois
Flash Flood Warning issued August 12 at 5:29PM CDT until August 12 at 8:00PM CDT by NWS Chicago IL
AREAS AFFECTED: Cook, IL; DuPage, IL; Will, IL
DESCRIPTION: At 529 PM CDT, Doppler radar and automated rain gauges indicated thunderstorms producing heavy rainfall with rates up to 2-3 inches per hour near the Downers Grove, Darien, and Woodridge areas. Up to 3 inches of rainfall has fallen thus far. This area of heavy rainfall is moving slowly eastward toward the central Chicago Metropolitan Area. Flooding is expected to begin shortly after the onset of heavy rainfall. HAZARD...Flash flooding. SOURCE...Radar and automated gauges. IMPACT...Rapid-onset flooding of creeks, streams, drainage ditches, streets, underpasses, low-lying areas, and other poor drainage areas. Some locations that will experience flash flooding include... Chicago, Naperville, Cicero, Bolingbrook, Oak Lawn, Berwyn, Oak Park, Downers Grove, Elmhurst, Lombard, Romeoville, Woodridge, Midway Airport, Austin, South Lawndale, Chicago Lawn, Englewood, Bridgeport, West Town and Chicago Loop.
INSTRUCTION: A Flash Flood Warning means rapid-onset flooding is imminent or may already be occurring. Persons along creeks, drainage ditches, and other waterways should take immediate precautions to protect life and property.
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Weather Topic: What are Cumulonimbus Clouds?
Home - Education - Cloud Types - Cumulonimbus Clouds
Next Topic: Cumulus Clouds
The final form taken by a growing cumulus cloud is the
cumulonimbus cloud, which is very tall and dense.
The tower of a cumulonimbus cloud can soar 23 km into the atmosphere, although
most commonly they stop growing at an altitude of 6 km.
Even small cumulonimbus clouds appear very large in comparison to other cloud types.
They can signal the approach of stormy weather, such as thunderstorms or blizzards.
Next Topic: Cumulus Clouds
Weather Topic: What is Drizzle?
Home - Education - Precipitation - Drizzle
Next Topic: Evaporation
Drizzle is precipitation in the form of water droplets which are
smaller than raindrops.
Drizzle is characterized by fine, gently falling droplets and typically does not
impact human habitation in a negative way. The exception to this is freezing drizzle,
a condition where drizzle freezes immediately upon reaching earth's surface.
Freezing drizzle is still less dangerous than freezing rain, but can
potentially result in hazardous road conditions.
Next Topic: Evaporation
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