Weather Alert in Illinois
Flood Warning issued April 3 at 3:01PM CDT until April 5 at 4:00PM CDT by NWS Chicago IL
AREAS AFFECTED: Winnebago, IL
DESCRIPTION: ...The National Weather Service in Chicago IL has issued a Flood Warning for the following rivers in Illinois... Kishwaukee River near Perryville affecting Winnebago County. For the Kishwaukee River...including Perryville...Minor flooding is forecast. * WHAT...Minor flooding is forecast. * WHERE...Kishwaukee River from Confluence with South Branch Kishwaukee River downstream to the Rock River, including the Perryville gauge. * WHEN...Until Sunday afternoon. * IMPACTS...At 13.0 feet, Roadways threatened at Blackhawk Valley Campground south of Rockford. * ADDITIONAL DETAILS... - At 2:30 PM CDT Friday the stage was 11.8 feet. - Forecast...The river is expected to rise above flood stage this evening to a crest of 12.7 feet tomorrow evening. It will then fall below flood stage late Sunday morning. - Flood stage is 12.0 feet. - http://www.weather.gov/safety/flood
INSTRUCTION: A Flood Warning means water levels above flood stage are imminent or may already be occurring. Persons along rivers and streams in the warned area should take immediate precautions to protect life and property. These forecasts are based on observed precipitation as well as forecast precipitation 24 hours into the future. Changes to the rainfall forecast, or any additional rainfall after 24 hours, may cause changes to these river forecasts. Additional information is available at www.weather.gov. The next statement will be issued by Saturday morning.
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Weather Topic: What are Cirrus Clouds?
Home - Education - Cloud Types - Cirrus Clouds
Next Topic: Condensation
Cirrus clouds are high-level clouds that occur above 20,000 feet
and are composed mainly of ice crystals.
They are thin and wispy in appearance.
What do they indicate?
They are often the first sign of an approaching storm.
Next Topic: Condensation
Weather Topic: What are Contrails?
Home - Education - Cloud Types - Contrails
Next Topic: Cumulonimbus Clouds
A contrail is an artificial cloud, created by the passing of an
aircraft.
Contrails form because water vapor in the exhaust of aircraft engines is suspended
in the air under certain temperatures and humidity conditions. These contrails
are called exhaust contrails.
Another type of contrail can form due to a temporary reduction in air pressure
moving over the plane's surface, causing condensation.
These are called aerodynamic contrails.
When you can see your breath on a cold day, it is also because of condensation.
The reason contrails last longer than the condensation from your breath is
because the water in contrails freezes into ice particles.
Next Topic: Cumulonimbus Clouds
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