Weather Alert in Illinois
Flood Advisory issued March 16 at 1:58AM CDT until March 16 at 10:00AM CDT by NWS Chicago IL
AREAS AFFECTED: Cook, IL; DuPage, IL; Kane, IL; Kendall, IL; Will, IL; Lake, IN
DESCRIPTION: * WHAT...Flooding caused by earlier excessive rainfall is occurring. * WHERE...Portions of northeast Illinois, including the following counties, Cook, DuPage, Kane, Kendall and Will and northwest Indiana, including the following county, Lake IN. * WHEN...Until 1000 AM CDT Monday. * IMPACTS...Creeks and streams will remain at bankfull or crest in minor flood stage. Partial flooding of low-lying areas such as fields and ditches will continue. Due to falling temperatures and falling snow, flood waters may be slow to recede or may even freeze in place, particularly in ditches and fields. * ADDITIONAL DETAILS... - At 154 AM CDT, river gauge levels in the advisory area indicate that many rivers and creeks are in action or minor flood stage. In addition, many fields, ditches, and other low lying areas are full of water. - Some locations that will experience flooding include... Chicago, Aurora, Joliet, Naperville, Cicero, Hammond, Gary, Arlington Heights, Evanston, Schaumburg, Bolingbrook, Palatine, Skokie, Des Plaines, Orland Park, Tinley Park, Oak Lawn, Berwyn, Mount Prospect and Wheaton. - http://www.weather.gov/safety/flood
INSTRUCTION: A Flood Advisory means minor flooding along waterways and other poor drainage areas is imminent or may already be occurring. Persons in the advisory area should use caution and avoid flood waters.
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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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