The same brisk southerly winds which delivered 80s to the Plains and western Midwest Monday bring Chicago unseasonable July-level temperatures Tuesday afternoon. It’s a development which sets the stage for the area’s warmest October open in 37 years. The last time a reading as warm occurred on Oct. 1 was 1976!
Tuesday won’t be the week’s last warm day. While the day’s gusty south to southwest winds give way to modestly cooler northeast to east winds off Lake Michigan Wednesday, southerly winds ahead of a developing autumn storm are not only to produce a resurgence in temps here Thursday and Friday—they’re also to send humidities surging. That lays the groundwork for clusters of late week thunderstorms—some capable of downpours and gusty winds.
Temperatures dive over the weekend—particularly Saturday night and Sunday. Sunday’s 65-degree predicted high not only signals cool weather for the Bears game (which begins midday), it would also rank as the 3rd-coolest day of meteorological autumn 2013.