The weather looks to be changin as we head into the weekend. Warmer (but moist) air will return, which will bring the onset of potential heavy rain beginning Sunday night with sharp temp differences between northern and southern IL. See day 2-7 outlook below.

THERE IS A CHANCE OF THUNDERSTORMS LATE SUNDAY GENERALLY SOUTH OF
INTERSTATE 80...AND ACROSS THE REMAINDER OF THE OUTLOOK AREA
SUNDAY NIGHT. THERE IS ALSO A CHANCE OF THUNDERSTORMS SOUTHEAST OF
APPROXIMATELY A PONTIAC TO VALPARAISO INDIANA LINE ON MONDAY.

RAINFALL TOTALS OF AN INCH OR MORE ARE POSSIBLE ACROSS PORTIONS OF
THE OUTLOOK AREA FROM LATE SUNDAY THROUGH MONDAY