the sweetness

from WBEZ:

Bitter cold not seen in the Chicago region for over a decade is gripping the area.

National Weather Service Meteorologist Mark Ratzer says a blast of cold air from the Arctic Circle was sent south by a shift in the jet stream. He says the coldest temperatures will come tonight and tomorrow morning.

RATZER: It's gonna be cold. Already this morning here we're seeing some wind chill readings out to our west here as much as 35 to almost 40 below zero. And tonight although our air temperatures will be colder, our winds ought to be just a little bit less, so our wind chill readings will probably be about the same - kind of in that -30 to -40 range.

Temperatures could be the coldest seen in Chicago since 1996.