With the warm front well to the north and low pressure in the Plains, southerly winds
will strengthen and continually pump mild air into northern Illinois today, Tuesday and
Wednesday. Chicago should experience highs of 70 degrees or higher on those three
days. Record highs of 75 degrees today and 74 degrees Tuesday are not out of reach;
and if they're not recorded at the official O'Hare Airport site, they will most likely be
observed elsewhere in Chicagoland. It has been 18 years (1990) since the last time
Chicago experienced three straight days of 70s in November.
As the low pressure system approaches the Mississippi River, clouds will begin to
overspread Illinois Wednesday.
AIR MASS CHANGE THURSDAY
Thunderstorms are expected Thursday with the passage of a cold front. Severe storms
may be associated with this front: first Wednesday in the central Plains, and then
primarily just to the west and south of Chicago on Thursday. Very cold air from
northern Canada will work its way south into Minnesota Friday. Once the storm center
finally moves northeast of Lake Superior, the southern tip of arctic air will flow into
northern Illinois next weekend.
--By Paul Dailey, WGN Weather Center Meteorologist
