An Arctic blast is forecasted to bring severe cold and snow squalls to Chicago, potentially disrupting travel and plummeting temperatures to as low as -20°F wind chill.

Detroit is expecting mixed precipitation today with a high of 36 degrees. Snow likely tonight with an increase in winds and lower temperatures. Clearer but colder on Thursday; weekend forecasts suggest variable weather with chances of rain.

Portland is experiencing cool weather with a 30% chance of rain in the afternoon, increasing to an 80% chance tonight, as per the NWS. Rain is expected to continue through the week, with temperatures in the mid-40s.