As colder air filtered into Maine early this morning some ice formed on the roadways and made the morning commute a bit slick. As our storm of yesterday heads north, a new air mass of below average air temperatures is headed for Maine.

Cold, bitter, frigid, arctic blast and of course polar vortex are words we are all hearing a lot of this week. You might be wondering, is this really THAT cold? The answer is maybe, but it depends where you are and how you look at the statistics.

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First, the coverage of the cold air over so much of the country is notable. Often in November one section of the United States sees arctic air, but it’s unusual for two-thirds of the lower 48 to see this type of widespread outbreak of cold.

Over the past 7 days if we look at the entire country there have been a lot of cold records being set. The chart below shows for example, 1360 daily low maximum records. This means those places had cold high temperatures which were records. Simply put, those cities and towns saw their coldest daily highs ever recorded.

With so many records falling it’s not surprising we are hearing about it on the local and national news outlets and it’s front and center in many newspapers as well.

The record cold highs have far outpaced the record warmth this year, but the overnight record lows are about half of the overnight record warmth. Part of the warm nights is likely heat island affect as many of the places where records are kept stay warmer at night with all the buildings, sidewalks etc.

All Time Records
Since the start of the year there have been some new all time record cold temperatures being established. Over the past week several of these have occurred especially over the western and central United States

Snow
Snow on the ground across the country pushed over 50% yesterday. This number is over double what we typically see this time of year and in comparison to the past decade it’s far above anything we’ve seen.

Last week parts of the Rocky Mountain States saw some record lows. You can see in the image below a few of those records. Some spots in Minnesota stayed under the freezing mark for longer than they had in decades this time of year.

This Week’s Cold
This current shot of cold air is coming farther east and impacting the east coast more than the previous outbreak.
Locally temperatures will stay in the 30s 4 or 5 of the next 5 days. In terms of the past 20 years, this is cold.

The chart shows the number of days under 40 for Portland in November since 1993, the average is 6 and the maximum has been 10 in 1997. The most ever, not on the chart, is 15 in 1921.

The cold does go into the Deep South as well. Florida has frost and freeze watches up for tonight.

There are possible record cold temperatures being set in Alabama. You can see some of the predicted cold readings and what the records are on the following graphic.

Here in New England I don’t expect many, if any, daily records to be set. In Portland the record low daily highs and the records lows are just way out of reach even in this particular pattern. This doesn’t mean you won’t be talking about the cold and saying things like “it’s too early for this” or “I’m not ready for this yet”.

We have short memories. Last year was also quite cold in November. The month averaged 2 degrees below normal. We had already had one day colder than anything we have seen this month so far.

So what’s the bottom line on the cold? You decide, but dress warmly while you’re thinking about it.

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