Special Weather Statement
There will be enhanced potential for ...

Coldest Temps in Years Tonight

January 23, 2011, 12:38:16 PM EST

If you haven't heard, tonight is going to be the coldest night in the recent cold outbreak over the northeast, and it is very likely that many locations, especially in New England, will record the coldest temperatures seen in quite a few years. All of this is certainly the case here on the summit of Mount Washington, and we may even break the daily record low of 38 below zero for tomorrow, January 24th.

The 12Z runs of the GFS and NAM MOS are showing lows tonight of 35 and 37 below zero, respectively. Each new run of this MOS data over the last couple of days has trended slightly colder. In fact, just before coming up the mountain last Wednesday, the MOS data was showing a low around 20 below tonight. Given that trend, and the fact that at the present moment (about 5 p.m.), temperatures are 5-7 degrees below what the 12Z MOS numbers were predicting, I would not be surprised if we hit 40 below tonight, for the first time since 2004. No matter what, my personal record low on the mountain of 30 below zero is going to get shattered tonight.

Keep in mind that I am talking about air temperatures. Winds are already sustained around 70 mph, and there is the potential that those wind speeds increase even a little bit more tonight. This translates to wind chills around 80 or 90 below, meaning a no skin exposed policy for the summit crew over the next 24 hours.The 12Z MOS also under forecast wind speeds for this time of day, telling me that either the arctic high is building more quickly, or cold air advection is stronger than expected.

After seemingly slow start to winter this year, things are starting to get really exciting on the mountain. Recent snowfall has helped us get closer to our average snowfall for the month of January, and the promise of a continued very cold and active pattern in New England has me excited to see what the rest of the winter has in store for us!

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