Weather Alert in Illinois
Flood Warning issued April 4 at 12:01PM CDT by NWS Paducah KY
AREAS AFFECTED: Pope, IL; Livingston, KY
DESCRIPTION: ...Forecast flooding changed from Moderate to Major severity and increased in duration for the following rivers in Missouri... Kentucky...Illinois... Ohio River at Cairo affecting Hickman, Ballard, Alexander, Pulaski, Mississippi, Carlisle and Fulton Counties. Ohio River at Smithland Dam affecting Pope and Livingston Counties. .A couple more rounds of moderate to heavy rain can be expected into the weekend. The rest of the event rainfall has been incorporated into the river forecast. The Ohio River has started to rise and crests are expected over the next week and a half. Now is the time to prepare for flooding. * WHAT...Moderate flooding is forecast. * WHERE...Ohio River at Smithland Dam. * WHEN...From Saturday evening until further notice. * ADDITIONAL DETAILS... - At 11:00 AM CDT Friday the stage was 32.0 feet. - Forecast...The river is expected to rise above flood stage late tomorrow evening and continue rising to a crest of 49.0 feet Thursday evening. - Flood stage is 40.0 feet. - Flood History...This crest compares to a previous crest of 49.5 feet on 04/27/2011.
INSTRUCTION: Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Be especially cautious at night when it is harder to recognize the dangers of flooding. Caution is urged when walking near riverbanks. Motorists should not attempt to drive around barricades or drive cars through flooded areas. Additional information is available at www.weather.gov.
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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
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
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