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 is Graupel?
Home - Education - Precipitation - Graupel
Next Topic: Hail
Graupel is a form of precipitation that is created by atmospheric conditions
which cause supercooled water droplets to contact snow crystals and freeze to
their surface.
Sometimes known as soft hail or snow pellets, graupel is delicate and easily
destroyed by touch. Whereas hail usually falls during severe weather, graupel
doesn't require such conditions to form, and can form in mild precipitation
similar to situations which produce snowfall.
Next Topic: Hail
Weather Topic: What are Hole Punch Clouds?
Home - Education - Cloud Types - Hole Punch Clouds
Next Topic: Mammatus Clouds
A hole punch cloud is an unusual occurrence when a disk-shaped
hole appears in a cirrostratus, cirrocumulus, or altocumulus cloud.
When part of the cloud forms ice crystals, water droplets in the surrounding area
of the cloud evaporate. The effect of this process produces a large elliptical
gap in the cloud. The hole punch cloud formation is rare, but it is not specific
to any geographic area.
Other names which have been used to describe this phenomena include fallstreak hole,
skypunch, and cloud hole.
Next Topic: Mammatus Clouds
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