Cold side of front for most of New England
Posted by Tim Kelley February 13, 2009 at 8:42 pm
Blue Bird Valentines Day.
Groomers tilled surface back to granular and packed powder, there are a few scratchy areas, but great weather and skiing for President’s Day.
This image is from the Stowe.com webcm at sunset Friday the 13th of February 2009. Michale Colbourn says the snow guns will turned on overnight to add fresh soft snow to the 64″ natural base reported at the Mount Mansfield snow stake.
Our weekend looks cold and dry, except in Northern Maine, where a ‘Backdoor Warm Front’ may bring some snow to Aroostook County.
The 979 low from Thursday moved to Newfoundland where is deepened further to 974 millibars, and has now stalled stared to fill and turn north. This storm is vertically stacked and cut off in the steering currents. That means the low level center and the upper level low are on aligned in the atmosphere. This creates blocking in the atmosphere that will keep the snowstorm in Iowa from coming northeast.
Also, because the Newfy low is over the edge of a continent and an ocean, we are mixing warmer air from the North Atlantic westward into southeastern Canada where we still have some arctic air available for storm development. A new storm is forming tonight in southeastern Quebec and will track southeastward, clipping northern Maine with a bit of light snow Saturday.
The reason I call it a Backdoor Warm front is because we have warmer air coming from the Northeast, somewhat unusual, but happens with this type of blocking pattern. Temperatures may be warmer in Northern Maine on Sunday, than in Vermont, just as if a warm front has come from the northeast.
We can keep an eye on the weather using the webcam at CrownOfMaine.com. this image form Presque Isle 9 PM Friday the 13th, when the temperature is only 12°. Let us see how warm it gets here Saturday Night and Sunday, and how much new snow we get.
To the west of the North Atlantic Block we have building pressure across Canada, pushing the cold air south into the U.S. At the same time we have, one after another, Pacific Storms slam into California and Oregon. Watch the snow amounts in those mountains go through the roof, with huge avalanche danger by Monday and into next week. The next shot at one of these storms getting to the east coast and turning our way is Wednesday into Thursday. At that point we may go back into a one or two storm a week pattern into March.
Joe should have a lot of fun with that here over the weekend.
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Oops.. I overlooked the wind in eastern Maine, gusting ot 50 mph. That is warmer (less cold) air from the north on the backside of a the new storm on the ‘Back Door’ warm front.