|National Weather Service map for February 29|
This has been one of the wierdest winters I've experienced in my 10 years in Illinois--nearly snowless and warm. Yesterday it was 56 by 8:00 in the morning as the winds blew (very strongly) up from the Gulf of Mexico--that's the dark brown area extending through central Illinois and Indiana. On the other hand, not all that far away, Michigan got hit with snow and freezing rain (pink and purple areas up near Canada). I have always wished that weather maps didn't stop at the border--friends in Toronto were also getting walloped by snow and freezing rain.
Here's a handy reference: a map of temperature extremes for whatever days you want to specify from Weather Underground. It's showing record high temperatures in the mid-west, and record cold temperatures in the southwest and northwest. It was just created this week by Dr. Jeff Masters to allow viewers to look at record extremes, both in the US and internationally. Instructions for using it in detail are under Masters blog entry on the lower right adjacent to the map.