Spring begins today, and we’ve got some nice weather for a few days, but the latter half of the week may not be as nice.
High pressure will be in control through Wednesday with dry weather and a warming trend expected. It’ll still be breezy today, but winds should diminish into Tuesday. Clouds will start to increase on Wednesday ahead of a warm front. That front will produce some showers Wednesday night into early Thursday, setting up a very mild day, with some showers possible. The front will sag southward as a cold front late in the day, likely stalling out near or just south of New England. Another wave of low pressure rides along that front on Friday with some additional showers likely, depending on where the front stalls out. With some cooler air in place, we could see some wet snow mix in across northern Massachusetts and southern New Hampshire if the front does stay out near the South Coast, but these are the types of details that are kind of fuzzy this far out, and will need to be fine-tuned later this week. Another low pressure likely moves up the St. Lawrence Valley over the weekend with a secondary low pressure system passing south of New England, but the details regarding timing and precipitation type with this system vary depending on which model you look at.
Monday: Wall-to-wall sunshine, breezy. High 45-52.
Monday night: Clear to partly cloudy. Low 25-32.
Tuesday: A mix of sun and clouds, breezy during the afternoon. High 53-60.
Tuesday night: Partly cloudy. Low 29-36.
Wednesday: Some morning sun, then becoming mostly cloudy with showers possible at night. High 51-58, cooler at the coast.
Thursday: Cloudy and breezy with a few showers early, then becoming more numerous late in the day and into the evening. High 52-59.
Friday: Cloudy, more showers possible, breezy. High 48-55.
Saturday: Cloudy and breezy with a chance of rain or possibly snow, especially north and west of Boston. High 40-47.
Sunday: More clouds than sun with a chance for showers early, breezy. High 44-51.
The final weekend of astronomical winter will be a fairly quiet one across the region.
Clouds start to stream into the region tonight ahead of a warm front. A few showers are likely on Friday as the front moves across the region,, but it will be quickly followed by a cold front early Saturday, which may produce a few more showers. We’ll clear out behind the cold front on Saturday, but the colder air will take its time moving in, so we’ll have another mild day, which shouldn’t interfere with any St. Patrick’s Day celebrations. High pressure settles in for latter half the weekend with dry and cooler weather on Sunday, but temperatures will start to moderate for Monday.
Thursday night: Partly cloudy through the evening, clouds increase after midnight. Low 27-34.
Friday: Mostly cloudy and becoming breezy with a few late-day showers. High 47-54.
Friday night: Mostly cloudy, chance for a few showers, mainly during the evening. Low 33-40.
Saturday: A few showers early, then becoming partly sunny, breezy. High 46-53.
Saturday night: Clear to partly cloudy, breezy. Low 22-29.
Sunday: A mix of sun and clouds, windy, and cooler. High 34-41.
Sunday night: Clear skies, breezy. Low 20-27.
Monday: Plenty of sunshine, breezy again. High 42-49.
As Metallica sings in the beginning of the song “All Nightmare Long”, luck does indeed run out. After getting lucky for nearly the entire winter without a major snowstorm, it appears that our luck has finally run out.
Today will be the literal calm before the storm with high pressure sliding off to the east, but still keep us dry despite plenty of cloudcover. After that, we turn our eyes to a developing low pressure system moving up the East Coast. This will likely be a potent storm when it gets up here, producing strong winds and quite a bit of precipitation. It’s also expected to stall out and perhaps make a bit of a loop, which means we’re looking at a long-duration storm, starting this evening, and likely not ending until Wednesday morning. That’s what we’re fairly certain about. What we’re not certain about is the actually track the storm takes, and where it stalls/makes a loop, and that is the most critical part of the forecast. Temperatures will be marginal to begin with, so a degree or two will make a huge difference. We’re not worried about any warm air aloft, so sleet and freezing rain aren’t a concern – just a good old-fashioned rain/snow line. With marginal temperatures, intensity will also help determine what falls, as lighter precipitation will be more rain than snow, while heavier precipitation will bring some colder air down from aloft, resulting in more snow than rain.
OK, having said all that, he’s our best estimate as to what we expect – low pressure moves up the East Coast, passing just south and east of Cape Cod. Meanwhile, a much weaker secondary low will move across Long Island and southern Connecticut, before it weakens and dissipates. This will help keep temperatures a little warmer, especially near the South Coast, with east to southeast winds. The original rather potent system will then do a loop in the waters just east of New England, before finally moving away on Wednesday. In terms of sensible weather we’re probably looking at nearly all snow north of the Mass Pike and outside of I-495, especially in the hills. South and east of there, precipitation likely starts as rain this evening, gradually changing to snow from northwest to southeast during the day on Tuesday as the system moves off to the east, and strong north to northwest winds bring cooler air in. Those winds will gust to 40-50 mph at times, but luckily tides are astronomically low, so coastal flooding isn’t a widespread concern.
As for snowfall, we need to make a distinction here between snowfall and snow accumulation. With the increasing sun angle, and the warmer ground, snow will have a hard time accumulating during the daylight hours, especially on paved surfaces, when precipitation is falling lightly. So, it could snow for quite some time, but there won’t be much on the ground. The model forecast maps that people love to share on Facebook and Twitter show snowfall, and as we’ve just said, those maps will not be reflective of what you may see on the ground when this storm winds down. What are we expecting for accumulation?
0-2″ – Outer Cape/Islands 2-4″ – South Coast/Upper Cape/Coastal Plymouth County 4-7″ – I-95 corridor (Providence/Boston), southeastern Massachusetts/North Shore 5-9″ – Metro West/Essex County/NH Seacoast 6-12″ – Merrimack Valley/Southern New Hampshire 8-16″ – Hilly terrain from northwest Rhode Island into central Massachusetts and southwest New Hampshire with isolated heavier amounts possible.
We will note that there are some models that do bring heavier (in some cases MUCH heavier) snow into eastern and especially southeastern Massachusetts. We’re not putting much stock in those. However, if they do end up correct, our snowfall forecast will be off by several orders of magnitude.
Once this storm pulls away, high pressure builds in with drier and more seasonable conditions for Wednesday night and Thursday. Another system may move in later Friday into Saturday, but this looks like mainly rain, with drier weather again behind that storm on Sunday.
Monday: Mostly cloudy, breezy, showers developing late in the day. High 40-47.
Monday night: Windy with rain likely, changing to snow across southern New Hampshire and central Massachusetts toward daybreak, rain may be heavy at times. Low 32-39.
Tuesday: Windy with rain changing to snow from northwest to southeast during the day. Snow and rain could be heavy at times. High 33-40 early, temperatures hold steady or drop during the day.
Tuesday night: Windy with snow gradually tapering off. Low 27-34.
Wednesday: Mostly cloudy and windy, snow showers ending. High 33-40.
Thursday: A mix of sun and clouds, breezy. High 42-49.
Friday: Becoming mostly cloudy, breezy, showers develop at night. High 45-52.
Saturday: Mostly cloudy, breezy, showers likely, possibly changing to snow before ending at night. High 45-52.
What looked like a complicated forecast earlier this week looks a lot easier now for much of the weekend. Things get a lot more complicated later Monday though.
High pressure will continue to build in tonight and Friday, with generally dry and seasonably cool conditions continuing. A storm system will pass west and then south of the region Friday night and Saturday. The cloud shield from the system will overspread the region late Friday, but most of the snow (or rain) will likely stay to our south and west. Yes, some snow showers may move in Saturday morning (mixed with rain near the South Coast), but accumulations, if any, will be negligible, except toward the Worcester Hills and the hills of northern Rhode Island, but even there, less than an inch is expected. High pressure builds back in for Saturday night and Sunday with chilly conditions once again. Monday is where things get interesting.
Low pressure will start to move up the coast on Monday, spreading more clouds in, but beyond that, there is considerable uncertainty in the track of the storm. Some models keep it mostly south and east of us, some bring it right up over us. No matter what the track, they all forecast the storm to become fairly strong, and hang around, so the effects of the storm will continue into much of Tuesday. So, at a minimum, we’ll have some gusty winds, and possibly a little coastal flooding, though tides will not be at their astronomical high for the month. As for precipitation, well, that depends on the track. The closer the storm gets, the more likely we’ll see some rain, though snow is possible at the start and the end. The farther inland you get, the more likely you’ll see snow, and possibly some heavy snow. Some of the models are forecasting rather significant snow totals well north and west of Boston, but again, this will be highly dependent on the track. We should have a lot more clarity on this when we publish our Weekly Outlook early Monday morning.
Thursday night: Partly cloudy. Low 23-30.
Friday: Sunny in the morning, clouds move back in during the afternoon. High 43-50.
Friday night: Cloudy with a few snow showers, possibly mixed with rain near the South Coast. Low 26-33.
Saturday: Mostly cloudy and breezy with some snow or rain showers early. High 35-42.
Saturday night: Clearing. Low 24-31.
Sunday: Morning sunshine fades behind increasing afternoon clouds. High 39-46.
Sunday night: Mostly cloudy. Low 25-32.
Monday: Mostly cloudy, breezy, snow or rain possible late in the day. High 40-47.
Much of the upcoming week will feature quiet weather, a welcome change from the active pattern we’d had over the past few weeks.
The week starts off with high pressure providing us sunshine and seasonable temperatures, but low pressure will continue to intensify in Atlantic Canada, producing gusty winds across the region for the next few days. A weak system will move out of the Great Lakes on Tuesday, likely passing south and west of the region, but it may be close enough for a few rain or snow showers. Wednesday and Thursday will feature intervals of clouds and sunshine with a few rain or snow showers along with gusty winds as disturbances rotate around low pressure south of Nova Scotia. By Friday, high pressure builds in with more sunshine and lighter winds.
Unfortunately, next weekend does not look as quiet. Most of the models are showing the potential for a storm system to impact the region next weekend, but they differ considerably on the details, including timing, placement, strength, and precipitation type. Hopefully, things will become clearer later this week.
Monday: Sunshine and some afternoon clouds, windy. High 41-48.
Monday night: Partly cloudy, breezy. Low 22-29.
Tuesday: Becoming partly to mostly cloudy, breezy, chance for a rain or snow shower. High 32-39.
Tuesday night: Partly cloudy, breezy. Low 22-29.
Wednesday: More clouds than sun, breezy, a rain or snow shower possible, mainly across Cape Cod. High 39-46.
Thursday: Partly to mostly cloudy, breezy, chance for a rain or snow shower, mainly near the coast. High 39-46.
Friday: Mostly sunny. High 40-47.
Saturday: Mostly cloudy, breezy, chance for snow or rain. High 38-45.
Sunday: Mostly cloudy, windy, chance for snow or rain. High 36-43.
Also, a remainder that Daylight Saving Time begins next Sunday at 2am, so you’ll lose an hour or sleep, or if you’ll be at work, you’ll have an hour less of work.
Meteorological spring began yesterday, so naturally, we’ve got a snowstorm on the way for a good chunk of the region.
High pressure builds in tonight with some clearing, but it won’t last too long. Couds quickly move back in on Friday as another storm system moves toward the region. This one will be somewhat similar to the last couple where the main storm system crosses the Great Lakes and heads up the St. Lawrence Valley while a secondary storm develops near the Mid-Atlantic coast and heads offshore south of New England. We’ll see snow developing Friday evening, quickly changing to rain near the South Coast and Cape Cod. Snow will continue overnight, but some warmer air will try to move in aloft, which will likely result in some sleet or rain mixing in. How far north that mixing occurs will obviously have a significant impact on the amount of snow that accumulates. Right now, our best thinking is that the mixing makes it to at least the Mass Pike, possibly up into the Merrimack Valley, during the morning and early afternoon on Saturday. The storm will also produce some gusty easterly winds, which will bring milder air in off the Atlantic, so a change to plain rain is possible near the coastline. By later Saturday afternoon, the system south of New England will pass off to the east, and winds will shift into the northeast and north, bringing cooler air back in, and allowing the precipitation to change back to all snow. While most of the steady snow should wind down towards evening, occasional snow showers may continue through the overnight as what’s left of the original low moves across the region. High pressure then builds in for later Sunday into Monday with dry and seasonably cool conditions.
So, how much snow are we expecting?
Cape Cod: 1″ or less South Coast: 1-2″ Southeastern MA/Central+Northern RI: 2-4″ Boston/MetroWest/Notre Shore: 3-6″ Merrimack Valley/NH Seacoast: 4-8″ Southern/Central NH: 5-10″ with isolated amounts in excess of 12″
Thursday night: Becoming clear to partly cloudy. Low 23-30.
Friday: Some morning sun, then clouds increase. High 37-44.
Friday night: Snow developing, changing to rain South Coast and Cape Cod, mixing with some sleet and/or rain across southeastern MA and RI overnight, becoming windy. Low 27-34.
Saturday: Windy with snow, mixing with or changing to sleet and/or rain south of the Merrimack Valley, changing back to snow late in the day. High 34-41.
Saturday night: Cloudy and breezy with occasional snow showers. Low 22-29.
Sunday: Morning clouds, some afternoon clearing, breezy. High 36-43.
Sunday night: Clear to partly cloudy. Low 24-31.
Monday: Partly to mostly sunny, breezy. High 40-47.