Thursday, December 28, 2017

So Cold There Might Be Funnel Clouds On Lake Champlain

In this map of how far above or below normal temperatures
were across the globe yesterday, note the cold in much
of North America, but the warmth in most of the rest of
the world. (Click on the map to make it bigger
and easier to read.)
In case you haven't noticed, the core of the cold arrived  here in Vermont and it's not going to go away anytime soon.

Most of us were in the teens below zero this morning. Over in New York State, Watertown, deep in lake effect snow from Lake Ontario, dropped to a remarkable 33 below zero as skies cleared there early this morning. That broke a record for the date of -23, set in 1993.

As I mentioned yesterday, the cold is widespread across the northern tier of the United States, and that will continue.

And it's a strong cold wave compared to many in recent years. Flint, Michigan dropped to 17 below, their all-time record low for any dates, though records only go back to 1921 in Flint. It might have been colder there before 1921.

Here in Vermont today, the air will grow slighly more unstable, and the wind will shift subtlely so that it will move generally north to south down most of the length of Lake Champlain. That sets the stage for some light lake effect snow, mostly south of Burlington.

More interestingly, it also sets the stage for cold air funnels and even brief waterspouts on Lake Champlain. This sometimes happens when the lake water is relatively warm and the air is super cold. These waterspouts aren't dangerous, and don't come on shore.

But if you dress warmly and you can stand it, find a view along the southern reaches of Lake Champlain (Charlotte would be good) and see if you can spot any funnels.

As mentioned yesterday, North America is the world's cold spot for now. Nowhere else in the world is nearly this far below normal. Central and southern Canada, and the northeastern half of the United States are the only real super cold spots in the world right now, at least compared to average.

To even things out, central Asia, parts of eastern Europe, parts of Siberia, southern Australia and northern Alaska right now are super warm compared to average for this time of year.

This frigid pattern still looks like it will last through at least the first week of January. Temperatures in Vermont and elsewhere will wax and wane a bit through the period, but generally stay at least 20 degrees below normal for most of the time.

Unfortunately, one of the more intense periods of cold looks like it will come on New Year's Eve. Remember how we were talking about the possibility of a nor'easter this weekend? Ain't going to happen. But a storm will form way off the New England coast and head northeastward away from the region while strengthening in the open waters of the Atlantic.
Warm thoughts on a cold day. As temperatures
 fell into the minus teens around my house in
St. Albans, Vermont, the Johnny's Seeds
catalog came in the mail to provide warm thoughts

That set up will increase northerly winds over the region Sunday, and also tug down another shot of pure North Pole air for New Year's Eve.

So if you're going to First Night or anything else on New Year's Eve, expect actual air temperatures to drop below zero by around sunset or even before. The winds will stay up all night, so wind chills could easily be in the 20s and 30s below zero.

You'll want to dress very warmly and be extremely careful New Year's Eve. I totally don't mean to be a Carrie Nation type scold, but remember, too, that alcohol makes you more susceptible to the cold, and impairs your judgement, so you might not go inside to get warm soon enough. Just keep that in mind.

A couple of other tips: Keep the gas tank full in your car. That increases the chances that it will actually start in these frigid mornings. Also, don't leave the dogs outside for that long.

Yeah, they're furry, but the pups still get dangerously cold quickly in this weather. Sure let 'em out to do their business and run around for a few minutes, but they can't take long periods of time outdoors.

There are hints it might briefly turn "warmer" for a day or two around next Wednesday when afternoon temperatures could, ahem, soar into the upper teens above zero.

We'll see.

No comments:

Post a Comment