As high pressure drifts off to the east and low pressure develops in the plains, southerly winds will strengthen here Monday gusting over 30 miles per hour in the afternoon – boosting temperatures close to the 60-degree mark here as well as over much of the Midwest.
Low pressure will track northeast through the western Great Lakes later Tuesday into Wednesday with the associated cold front approaching our area from the west – passing through here later in the day Wednesday.
As the upper-level jet stream orients southwest-northeast from the Texas Panhandle over Illinois and Wisconsin, Tropical Storm Sonia will be moving past the southern tip of the Baja Peninsula into western Mexico. Moisture from Sonia will be incorporated into the plains low pressure system as it heads our way, increasing the chance of heavy downpours in the showers and thunderstorms that develop along and ahead of the cold front as it crosses the Mississippi River. Tuesday night and Wednesday could see rainfall totals well in excess of an inch here before the front finally moves on to the east Wednesday night.
Cooler high pressure will follow into the Chicago area Thursday, and highest readings will generally hover in the upper 40s to lower 50s into the coming weekend – a little below, but not far from normal for mid-November.