PATCHY DENSE FOG HAS BEGUN TO DEVELOP ACROSS PORTIONS OF NORTH
CENTRAL ILLINOIS TONIGHT...AND IS EXPECTED TO BECOME MORE
WIDESPREAD THROUGH THE PREDAWN HOURS. VISIBILITY LESS THAN A
QUARTER MILE IS POSSIBLE...ESPECIALLY IN LOW LYING AREAS AND NEAR
CREEKS AND RIVERS. MOTORISTS SHOULD REMAIN ALERT FOR RAPIDLY
CHANGING CONDITIONS.
