Apr 28, 2015 9:23 PM
NH1 Chief Meteorologist - NH1.com
Hard to believe our weather is still being controlled by this slow moving upper level low over our heads...but it is! The cool air above our heads has made for considerable clouds to form almost every day during the afternoon. The Upper Low is currently parked over Nova Scotia and has pulled enough east that we are getting onto the drier and more stable side with downsloping and drying NW winds, which allowed temps to climb into the Lwr 60's Tuesday. Because of the atmospheric block we are currently in, the cooler air over the Canadian Maritimes is currently being directed back towards New England. A back door front will push through New England Wednesday with a wind shift from the NW to the NE. This will allow cooler marine air to begin to settle in over the region along with increasing low clouds which will be shifting from ME into NH.
We will also be tracking moisture coming out of the Gulf on Wednesday. This will be an area of low pressure which will deepen off the Carolina coastline Thursday and track far enough south of New England to spare us any big impacts thankfully. But, the steady, breezy onshore winds will be reinforced to end the week through Friday with temperatures near 50-55 and abundant cloud cover, maybe an isolated shower.
This low will bomb out farther out to sea and become a powerful low for this time of year. It will drag in dry air on the back side as weather will begin to brighten and improve just in time for the weekend! A warm front will approach late Sunday, with the risk of a late day shower. This will mark the leading edge of noticeably warmer air which will begin to arrive into the Northeast. The upper level pattern looks favorable for this warm up, as the jetstream will begin to flatten, allowing the mild air to push farther north. By the start of the week, an upper level ridge of sinking stable air will be in place with temperatures spiking into the 70's with a SW wind shift!
This really looks like the pattern breaker we have been waiting for to finally rid ourselves of this nasty taste of winter. While there will still be a few reinforcing blasts of cooler air ahead from time to time, the cooler air will be brief...and the warmth will be more extended. So while while May 1st will be cool...expect many more mild days ahead! 70's here we come! Suddenly it will be summer around here!
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