Really?

At this time yesterday, it was 74 degrees here in Louisville.  I had on shorts and a t-shirt when I went to the grocery store at 8:00 yesterday evening.  Right now, it's 40, with the wind chill factor in the low 20's, and the expected low tonight in the upper teens.  Really?  All I can say is that the few people that aren't sick already will be sick now.