Chicago had its 4th-warmest December in history last month, with temperatures averaging about 4°C above normal. The trend has continued this month as well. That won't completely end tonight, though we may see some snow:
The first “significant” winter storm to impact the Chicago region is scheduled to start Monday night, with meteorologists predicting two to five inches of snow accumulation and wind gusts up to 30 miles per hour across portions of central and northeast Illinois and northwest Indiana.
A winter weather advisory goes into effect at 8 p.m. until noon Tuesday in the Chicago metro area as well as parts of DuPage, Will and Lake counties.
The storm will likely be split into two rounds, according to the NWS. The first will arrive this evening starting around 8 p.m., with much of the snow accumulating in a brief window from 1 to 5 a.m., just before the early morning commute.
Lovely. But a few centimeters of snow won't bother either Cassie or me tomorrow morning, especially if the temperature stays freezing, as forecast.
Next weekend, though, looks like it might feel more like Real Chicago Winter, with temperatures dropping to -13°C overnight Saturday. I, however, will be in the Pacific Northwest, where...dammit. Temperatures will drop to -6°C overnight Saturday. (I thought Seattle was supposed to be warmer than Chicago?)
Sigh:

I have to remember that the normal temperature curve for Chicago bottoms out from January 17th to 23rd. So it will get colder this winter. I'll take the win for December and just remind myself that our winters build character.
We got about 50 mm of snow overnight, even though the temperature barely got below freezing at O'Hare and never got below freezing at IDTWHQ. I expect most of it will melt today, but this morning it looked pretty:


On the other hand, most of the models predict a huge winter storm next weekend. If I get supremely lucky, the worst of it will hit while I'm away. If my luck runs as usual, I'll spend a lot more time at O'Hare than I'd prefer.
At least sunrises have finally started to get earlier.
"Scattered flurries," they said. "Less than 10 mm accumulation," they said.

The forecast has changed a bit since yesterday:
Today: Snow and freezing drizzle likely, becoming all snow after 10am. Cloudy, with a high near 1. West northwest wind 15 to 20 km/h increasing to 20 to 25 km/h in the afternoon. Winds could gust as high as 35 km/h. Chance of precipitation is 70%. Little or no ice accumulation expected. Total daytime snow accumulation of less than one centimeter possible.
Tonight: Snow likely, possibly mixed with rain, becoming all snow after midnight. Cloudy, with a steady temperature around 1. North wind 25 to 30 km/h decreasing to 20 to 25 km/h after midnight. Winds could gust as high as 45 km/h. Chance of precipitation is 70%. New snow accumulation of 1 to 3 centimeters possible.
At least it's not that cold. And Cassie seems to enjoy it.
One of my friends got this little clock for me:

It's an Author Clock. Instead of just the time, it shows a literary quote containing the time. They have well over 1,440 quotes in there (they claim 13,000), and they update frequently, so you may never see the same quote twice.
I had it in my home office for about an hour and got no work done. Because it's that cool.
As I said yesterday, Christmas this year had much better weather than last year, despite the rain. And this morning, it's official: we had the second-warmest December 25th since records began, with a high at O'Hare of 15°C. The warmest, in 1982, hit 17°C.
It's cooled off just a bit today but we don't expect any rain. I managed to get Cassie out for an hour and eight minutes yesterday. Today I actually have to work, but she'll get a full hour at least.
Last year:

Today:

This kind of warmth on Christmas? (In fairness, the record is 17°C in 1982.) Thank you, Santa! Cassie has already gotten more than an hour of walks, to say nothing of the 3½ hours of walks she got earlier this weekend. It's raining now, but we'll go out again once it stops.
Cassie and I walked down to Christkindlmarket by Wrigley Field yesterday to meet up with some friends. I understand that the lakefront was completely fogged in, but a kilometer or so inland it just looked creepy:

And on the walk home:

Right now at Inner Drive Technology World Headquarters, the sun has started peeking out, though the temperature-dewpoint spread hasn't gotten that much wider from this morning: 10.9°C with a dewpoint of 10.6°C. O'Hare still reports mist with increasing horizontal visibility but a very low (200 m) ceiling.
As soon as I deploy a bugfix to Weather Now, however, I'm taking Cassie on a 45-minute-or-so walk that will wind up at Spiteful Brewing. We might even sit outside, which is not the usual course of events on Erev Xmas.
The WGN Weather Blog noted that today's forecast high temperature at O'Hare (11°C) is an incredible 29°C/52°F warmer than the high temperature a year ago.
Last December 22nd stayed above freezing until just before noon, then slid all the way down to -21°C at midnight. And it kept getting colder overnight. Last December 23rd, Cassie got all of 13 minutes of walkies. She's already gotten half an hour this morning with promises of 2 full hours before we go to bed.
I know it's a lot to ask for, Santa, but can this whole winter be like this? Oh, wait, the Climate Prediction Center has a thought about that:
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Updates as conditions warrant.
The El Niño part of the ENSO typically gives Chicago warm, dry winters (relatively—it still gets cold and snowy here, just not as cold and snowy as usual).
Exhibit 1, a map of temperature anomalies in the Continental US for the first 12 days of December:

I'm about to leave the office to go home, where it's 8°C, after hitting 11°C at O'Hare a couple of hours ago. Tomorrow it might get warmer. And that's OK by me.
Cassie has two fur coats on, but I don't. Spot the cold front:
