010414_ff_dean_640It seems to be a little late in the season to be talking about this, but potentially record-breaking cold air is set to move into the area Wednesday and Thursday. Temperatures Tuesday will shoot toward 20 degrees with single-digit wind chills before colder air descends upon the Chicago area in the first of two cold fronts. Overnight lows into Wednesday will range from 0 degrees in the city to -10 degrees in the Fox Valley by dawn. The standing record low for Feb. 26 is -1 degrees, set in 1963. Forecast models show that record could be threatened. Wind chill is the other part of the story. The National Weather Service has posted a Wind Chill Advisory from midnight through noon Wednesday with values predicted between -20 degrees and -30 degrees.  More