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 Map of areas which have seen a freeze so far this autumn. Map courtesy of Midwestern Regional Climate Center.
Frost and freeze conditions have been observed over portions of central and southeast Illinois so far this autumn.  The map above, courtesy of the Midwestern Regional Climate Center, shows the areas that have seen the first freeze of the season.
(click image to enlarge)

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NOAA bullet Fall Newsletter (PDF, 2.2 MB) 
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2012 Weather Summaries:  
Mar 2 -- Large Hail Southeast of I-55
Mar 4 -- Snowfall
Mild 2011-12 Winter
March 2012 - Record Warmth
May 1 -- East Central Illinois Tornadoes
Aug 16 -- Severe Weather and Heavy Rain
Aug 31-Sep 3 -- Isaac Remnants
Illinois Weather Trivia
10/22/2010
Frost occurs when the surface temperature cools to the dewpoint temperature, and both are at or below 32 degrees. Water vapor in the air turns directly into ice without becoming a liquid first, producing visible ice crystals on surfaces. Freezes occur when the air temperature (measured about 6 feet off the ground) falls below 32 degrees; temperatures of 28 degrees or colder are considered to be a hard freeze.
For more weather history, visit our Illinois Weather Trivia page!

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  • 1362 State Route 10
  • Lincoln, IL 62656
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  • Page Author: ILX Webmaster
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  • Page last modified: 3-Jul-2012 12:44 AM UTC