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Boston weather: Clocks spring forward, but not the weather

The weather map for Southern New England at 2 p.m. EDT on March 9, 2014. Mostly sunny skies is expected.
The weather map for Southern New England at 2 p.m. EDT on March 9, 2014. Mostly sunny skies is expected.

Forecast discussion: The weather decided to give us an early feel of springtime around eastern Massachusetts on Saturday. Before a cold front came through, temperatures this afternoon reached the lower 50’s. Logan Airport officially received a high temperature of 52, although parts of the metropolitan area went up as high as 55 degrees. We will return to chilly weather before temperatures increase once again. Then, we will be dealing with a Nor’easter.

High temperature forecast for March 9, 2014

As the cold front passes through Southern New England, temperatures will fall back below freezing. Along this frontal boundary will be a weak disturbance, which will try to create some isolated snow showers. At this time, it appears the Cape and Islands will have the greatest chance of seeing any precipitation. The precipitation will end by the late morning, and everyone will see mostly sunny skies. We will also be enjoying sunshine a little longer in the day. Remember, we are to set our clocks forward at 2 a.m. Sunday morning for Eastern Daylight Time. Temperatures, however, will be about 15 degrees colder. By Sunday night, a weak low pressure system over northern Canada will bring the chance for some passing snow showers until Monday morning.

We will see temperatures climbing once again by Tuesday, as a warm front moves through the region. Temperatures may reach the lower 50’s despite limited sunshine. As we move into Tuesday night, a low pressure system moving over the Tennessee River Valley will begin to intensify as it moves into the Mid-Atlantic Wednesday morning. This low will become the Nor’easter the computer models are now seeing for Wednesday afternoon into Thursday evening.
At this time, it is still too difficult to tell what kind of precipitation types we will receive. My main thinking is we will first start off as rain. Due to the warmer air already aloft from Tuesday, it will take some time for the colder air to take over the upper levels of the atmosphere. By Wednesday night, the colder air will begin to turn the precipitation into a sleet and/or wet snow. Before the morning commute on Thursday, we should change completely over to snow. However, there are still differences in the computer models of the exact track the low’s center will take. If the low stays north and west of us, we will see warmer air, meaning more sleet and rain. If the low tracks to the south and east, colder air behind the low takes over, so we would see more snow. I will continue monitoring the situation, and give you any new updates tomorrow evening.

We will see calmer weather on Friday, but once again colder air from Canada will keep our temperatures well below normal. Some warmer air begins to filter in by next Saturday, and a weak cold front passing over the region will give us rain showers by the morning hours.

72 hour forecast:

Tonight: Mostly cloudy with a possible snow shower around dawn. We will see a low of 27.
Sunday: A possible snow shower along the Cape and Islands until 10 a.m. Otherwise, mostly sunny skies expected for the rest of the day. We will see a high of 35 with north-northwest winds at 10-13 mph.
Sunday night: Mostly cloudy with snow showers starting around 3 a.m. We will see a low of 24 with west-southwest winds of 6-9 mph.
Monday: Scattered snow showers ending around noon and a high of 39. Up to half an inch accumulation is possible.
Monday night: Mostly cloudy with a low of 33.
Tuesday: Partly sunny and warmer with a high of 48.
Tuesday night: Mostly cloudy with a low of 33.

Extended Forecast:
Wednesday: Cloudy by late morning, with light rain developing around 4 p.m. Highs 40-43, lows 25-28.
Thursday: Windy with rain changing to sleet around 1 a.m. before changing to light to moderate snow by 4 a.m. Snow begins to taper off by 2 p.m. before ending around 9 p.m. Highs 30-33, lows 17-20.
Friday: Mostly sunny. Highs 34-37, lows 25-28.
Saturday: Mostly cloudy with possible rain showers by mid-morning. Highs 41-44, lows 27-30.

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