I'm a few minutes from leaving my folks' house, looking at the weather forecast for Chicago. We may set a new record:
The unseasonable late-season 10°C “warmth” which greets Chicagoans Saturday has swept into the area from southern Missouri over the past 24 hours. It’s stay is to be one of limited duration.
A bitter southward plunge of frigid arctic air begins a downward temp spiral here Sunday which is to culminate in colder-than- -18°C Monday morning lows and single digits daytime highs—the coldest readings to occur here in the nearly five years since January 16, 2009 when the high temp rose no higher than -15°C
A temperature drop of that magnitude would become the 2nd greatest three-day late December temp dive on the books over the past 143 years. The only 3-day temperature drop more significant than this is the 34°C drop—from 15°C to -19°C back in January of 2009.
This is why I've just booked a trip to somewhere warm for February.