The temperature at Inner Drive Technology WHQ has gone up all day, just surpassing yesterday's afternoon high of -11.3°C:

Of course, yesterday's actual high was -10.3°C, at midnight, and we won't hit that again until tomorrow. But by Friday we'll be able to walk outside without losing extremities, and by Sunday it'll even be above freezing. And then, in 10 days: spring!
There is one advantage to Arctic air over Chicago, though: the air is really clear.
