Mar 29, 2016 2:03 AM
NH1 Weather Insider with Joe Joyce: March 29, 2016
NH1 Chief Meteorologist
Hold on to your hats because gusty winds from the Northwest will be blowing all day! The storm which brought the rain on Monday is pulling away and deepening into a stronger storm over the Canadian maritimes. High pressure sits over the Great Lakes. As this storm deepens and becomes stronger, the difference in air pressure between the high and the low is creating stronger winds as air is flowing from high into Low pressure. Tuesday will thankfully be a dry day with a mix of sun and clouds. Temperatures will start off near 40 at dawn, but with a push of cooler air coming in from Canada, those temperatures will not be able to rise much over the course of the day. I expect highs to remain in the 40's, even cooler in the north country in the 30's. Speaking of the mountains, watch out today! First, some of the north facing slopes of the Whites will be picking up a new 2-4 inches of snow with upsloping NW flow! But the winds is what we have to watch out for today! Mountain summits and hills could see gusts to 50+ mph. Winds should be ripping through the valleys today as well. For most of us though, it will be a sustained 25 to 30 mph wind with gusts 35-40+ mph today. Winds will remain breezy right into the evening with a blustery feel and lows dropping into the 20's overnight with a diminishing wind overnight.
High pressure slides towards the Mid-Atlantic states with more sunshine and lighter winds for the midweek for us. High temperatures will climb into the Lwr-mid 50's during the afternoon. As the high pulls farther south, a milder SW wind will develop Thursday. Winds will be picking up and these milder breezy winds will push afternoon temperatures into the 60's as skies become partly sunny. The upper level ridge will hold on long enough across the eastern sea board to keep most of Thursday mild and dry. We will be watching a low form the midwestern states track up through the Great Lakes. This will push a cold front across New England Friday. Showers will develop Thursday night, with the potential for some heavier rain along this cold front Friday along with some gusty winds.
The break down of warmth starts Friday with the rain, but the weekend is where the cooler air will be arriving. The weekend will feature an Arctic cold front, which will deliver an unseasonably cold airmass for early April right from the Arctic into New England. Saturday will be a mix of sun and clouds with a west wind with highs near 50. A weak upper level low will push through, and bring just enough instability to trigger a brief pop up shower or snow shower. It seems our best chance at this will be Saturday night as the cold front will push through and off the coast early Sunday morning. Breezy NW winds and cold air advection will help to keep temps in the 30's to near 40 degrees Sunday with a mix of sun and clouds. Another cold front pushes through late Sunday, and this is where temperatures will really drop off! Once the sun sets Sunday night, lows will drop into the teens overnight with some areas approaching record cold early Monday morning. I would hope no one here in New Hampshire has started any early gardening, since it is way too early for that...but if you have any potted plants...Sunday Night you will definitely want to bring them indoors. The cold will stick around through Monday with sunshine and unseasonally cool temperatures. Highs will remain in the 30's to near 40 when typically we should be closer to 50 for early April.
The trough that supplies the cold blast of air will begin to lift out next week. So it does not appear this blast of Arctic air will not have much staying power without much of a blocking pattern to hold that trough in place. Temperature fluctuations will continue in this early Spring season with another shot of cooler air coming sometime around April 8th and 9th...again...the cold is fleeting. While the cooler air will make for a temporary set back with one step back...this time of year is definitely two steps forward!