O’Hare’s 56 and Midway’s 57—November-level temps—are just a memory as Thursday gets underway. Gusty west winds have swept arctic air into the area overnight, part of a cold blast which is to lower temperatures the back half of this work week to levels approaching the lowest observed here since last February.
By Saturday morning, temperatures are likely to have retreated 7-degrees below Wednesday afternoon and evening’s unseasonably warm levels—tumbling from the 56 yesterday to just 9 as Saturday dawns. And, while readings may rebound to 30 for a day Sunday as a disturbance shift winds from the east northeast off Lake Michigan while shrouding the area with clouds and limiting nighttime cooling, the stage is set for even colder air next week. That frigid spell could generate temperatures below the lowest levels achieved all of last winter.
For more, log on to Chicago Weather Center.