Temperature Reaches 100 F Wednesday!

Temperatures Reached 100 degrees in some spots again Wednesday July 20th, after Rockford and Kankakee both hit the century mark on Tuesday the 19th.
Rockford reached 100 degrees for the second day in a row Wednesday, marking the first time Rockford has had back to back 100 degree days since August 16th and 17th of 1988, 23 years ago! It had been 22 years since it last reached 100 degrees in Rockford, on July 10th, 1989.
In Chicago, while the official recording site at O’Hare only reached 99 degrees, a few spots including Northerly Island, Midway Airport and northwest suburban Chicago Executive Airport in Wheeling did reach 100 degrees Wednesday afternoon. The last time Chicago officially hit 100 degrees was six years ago, on July 24th 2005, when O’Hare, Midway and Northerly Island recorded highs of 102, 104 and 102 degrees respectively.
The hot temperatures Wednesday, combined with dew point temperatures in the lower and middle 70s, resulted in oppressive conditions which yielded peak heat index values ranging from 105 degrees to as high as 115 degrees during the warmest afternoon hours.

The following is a list of high temperatures and peak hourly heat index values for Wednesday July 20th 2011 across northern Illinois and northwest Indiana:


Location:                        Max T   Peak HI
Chicago Northerly Island          100     112
WFO Chicago at Romeoville          99     107
Airport ASOS Locations:
Aurora/Sugar Grove                 97     109
Chicago O’Hare                     99     108
Chicago Midway                    100     108
Chicago Executive/Wheeling        100     112
DuPage County/West Chicago         97     109
Rockford                          100     108
Waukegan                           98     108
Valparaiso                         99     111

Airport AWOS Locations:  Highest Hourly

DeKalb                             95     112
Gary                               99     107
Joliet                             99     107
Kankakee                           99     115
Lansing                           100     111
Morris                             95     101
Peru                               97     107
Pontiac                            97     112
Rochelle                           93     102

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