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Dec 18, 2015 11:22 PM

NH1 Weather Insider with Joe Joyce: December 19, 2015

NH1 Chief Meteorologist

Cooler air arrives this weekend! This will be the coldest air we have seen since December 1st. There are not many Decembers that go by when we do not receive even a trace of snow in New Hampshire. It really is incredible. This will likely be the warmest December on record. Temperatures are already averaging 10 degrees above normal for the month as every day has been in the 40's and 50's with no snow in sight. If anything, we are looking at another warm up next week and the potential to even break a few warm records!

An upper level trough is pushing through New England today. This is directing the seasonal cool December-like air into the Northeast. We will see a mix of sun and clouds Saturday with highs in the 30's. Gusty west winds up to 20-30 mph will make the temperatures feel in the 20's during the afternoon. It will be a day to dress a bit warmer compared to what we have been doing lately. Mountain snow showers will develop as this upper level disturbance pushes through. Minor accumulations will be possible on the mountain tops along with the whipping wind.

High pressure will lie south of us Sunday with Sunshine and lighter NW winds shifting to the SW. Highs will be in the 30's to near 40 as the cooler pool of air will be lifting out. An upper level ridge will be shifting eastward providing for more stable air Sunday into Monday. As the high pulls off the coast a warmer SW wind develops. This SW wind flow will be the dominant wind direction for much of the week directing milder air back into the Northeast. Clouds which will be on the increase on Monday as a low will track N & W of New England. It could trigger an isolated shower.

Even though temperatures will be climbing back into the 50's next week, this warm up will not be pretty. There will be considerable cloud cover in this SW flow aloft up the east coast . A warm front will approach Wednesday, which will provide the chance of showers. This warm front will push through so by Thursday..The day before will be the warmest day of the week with highs in the 50's to near 60 in spots ahead of an approaching cold front. We may even approach record warmth for some. The cold front will push through early Christmas morning. Highs will be reached at dawn. Temperatures will fall through the day under gusty NW winds. Temperatures on Christmas will be in the 40's with partly sunny skies, and flurries or snow showers in the mountains. Have a great weekend!

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Concord, NH
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