Out of an abundance of caution, Chicago Aikikai is cancelling the 6:30 am class on Tuesday, January 21 and Wednesday, January 22 due to the severe cold weather warning.
UPDATE
Decision has been made also to cancel the evening classes on Tuesday, January 21 (6:15 pm – 7:25 pm; 7:30 pm – 8:30 pm) due to the cold weather warning.