Weather Alert in Illinois
Flood Watch issued July 11 at 3:38PM CDT until July 11 at 10:00PM CDT by NWS Chicago IL
AREAS AFFECTED: Winnebago; Boone; Ogle; Lee
DESCRIPTION: * WHAT...Flash flooding caused by excessive rainfall continues to be possible. * WHERE...A portion of north central Illinois, including the following counties, Boone, Lee, Ogle and Winnebago. * WHEN...Until 10 PM CDT this evening. * IMPACTS...Creeks and streams may rise out of their banks. Flooding may occur in poor drainage and urban areas. Roads and streets may be flooded. * ADDITIONAL DETAILS... - Additional showers and thunderstorms are expected into this evening. The stronger storms will be capable of producing rainfall rates in excess of 2 inches per hour. If storms persist over a given area for a couple of hours, then those isolated locations could see rainfall totals in excess of 4 inches this afternoon and evening. Rainfall of this magnitude would likely result in flash flooding, particularly if it occurs in areas that saw heavy rainfall and flooding Thursday. - http://www.weather.gov/safety/flood
INSTRUCTION: A Flood Watch for flash flooding means rapid-onset flooding is possible, but not yet certain, based upon the latest forecasts. Flash flooding is a dangerous situation. Persons with interests along area rivers, creeks, and other waterways should monitor the latest forecasts and be prepared to take action should flooding develop.
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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
Weather Topic: What are Nimbostratus Clouds?
Home - Education - Cloud Types - Nimbostratus Clouds
Next Topic: Precipitation
A nimbostratus cloud is similar to a stratus cloud in its formless,
smooth appearance. However, a nimbostratus cloud is darker than a stratus cloud,
because it is thicker.
Unlike a stratus cloud, a nimbostratus cloud typically brings with it the threat
of moderate to heavy precipitation. In some cases, the precipitation may evaporate
before reaching the ground, a phenomenon known as virga.
Next Topic: Precipitation
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