Weather Alert in Illinois
Special Weather Statement issued February 5 at 3:27PM CST by NWS Chicago IL
AREAS AFFECTED: McHenry; Lake; Kane; DuPage; Northern Cook; Central Cook; Southern Cook; Northern Will; Southern Will; Eastern Will; Lake; Porter; Newton; Jasper
DESCRIPTION: A fast moving weather system will produce a short 3 to 5 hour period of accumulating snow late tonight into early Friday morning. While significant snowfall amounts are not expected, a burst of snow, with rates up to 1 inch per hour, could result in a period of slick travel due to snow covered roads early Friday morning. Accordingly, motorists are urged to plan for extra time to reach their destination Friday morning.
INSTRUCTION: N/A
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Weather Topic: What is Hail?
Home - Education - Precipitation - Hail
Next Topic: Hole Punch Clouds
Hail is a form of precipitation which is recognized by large solid balls or
clumps of ice. Hail is created by thunderstorm clouds with strong updrafts of wind.
As the hailstones remain in the updraft, ice is deposited onto them until their
weight becomes heavy enough for them to fall to the earth's surface.
Hail storms can cause significant damage to crops, aircrafts, and man-made structures,
despite the fact that the duration is usually less than ten minutes.
Next Topic: Hole Punch Clouds
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
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