Weather Alert in Illinois
Flood Warning issued May 17 at 9:16PM CDT until May 20 at 7:00PM CDT by NWS St Louis MO
AREAS AFFECTED: Madison, IL; St. Charles, MO
DESCRIPTION: ...The National Weather Service in St Louis MO has issued a Flood Warning for the following rivers in Illinois...Missouri... Mississippi River at Mel Price LD. River forecasts are based on observed precipitation and forecast precipitation for the next 24 hours. * WHAT...Minor flooding is forecast. * WHERE...Mississippi River at Mel Price LD. * WHEN...From Saturday afternoon to Monday evening. * IMPACTS...At 21.0 feet, Flood Stage. Minor flooding begins to occur at this level. * ADDITIONAL DETAILS... - At 9:00 PM CDT Friday the stage was 20.7 feet. - Forecast...The river is expected to rise to a crest of 21.0 feet early tomorrow afternoon. It will then fall below flood stage early Sunday afternoon. - Flood stage is 21.0 feet.
INSTRUCTION: Motorists should not attempt to drive around barricades or drive cars through flooded areas. This product, along with additional weather and stream information, is available at https://water.noaa.gov/wfo/lsx
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Weather Topic: What are Mammatus Clouds?
Home - Education - Cloud Types - Mammatus Clouds
Next Topic: Nimbostratus Clouds
A mammatus cloud is a cloud with a unique feature which resembles
a web of pouches hanging along the base of the cloud.
In the United States, mammatus clouds tend to form in the warmer months, commonly
in the Midwest and eastern regions.
While they usually form at the bottom of a cumulonimbis cloud, they can also form
under altostratus, altocumulus, stratocumulus, and cirrus clouds. Mammatus clouds
warn that severe weather is close.
Next Topic: Nimbostratus Clouds
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
