Today + The Week Ahead


This post is being done a little earlier than normal because your blog writer is taking a short break between outside errands and decorating and a marathon indoor decorating spree that should have me all ready for my annual 6 week long Christmas display beginning on Monday December 1, which is tomorrow!

Now that we got that straight, let’s move onto today, the final day of the Thanksgiving Weekend. Warm air is moving in, but an inversion at low levels has caused a variable blanket of cloudiness, which has thinning and retreated at times to allow more sun, especially in southern and eastern MA and RI. We’ll be in and out of clouds and sun across southeastern New England this afternoon though sun should end up dominant as the inversion is finally erased by advancing mild air. Though a little sloppy underfoot where snow/ice are still on the ground and melting, not a bad day to be outside for any of the various reasons people may have to be out there today.

Now to the coming week. Yes the milder pattern we have been speaking of for the first third of December is getting underway, but this does not mean every day will be mild. It’s an overall milder pattern, relative to normal, than the one we saw for the majority of November. A Pacific jet stream will be dominant, but with plenty of cold air sitting across Canada, disturbances moving along the jet stream, while passing mostly north of southeastern New England, will be able to grab pieces of the cold air and toss it southward as they depart. This will result in quick cold shots behind these systems (Tuesday and Thursday of this coming week will feature those cold shots). Preceding the Tuesday cold shot will be a cold front passing by Monday pushing into mild air, bringing some cloudiness and a rain shower threat. A warm front will approach Tuesday night and may bring some light icy precipitation, but mild air will be quick on its heels for Wednesday, which will feature a chance of rain showers. By later Friday, another warm front will approach after the second cold shot, and there is some uncertainty as to how this sets up as we head into next weekend. We may be dealing with some unsettled weather which may include a variety of precipitation by next weekend as there will be a tendency for low pressure trying to form to the south while a cold high pressure area retreats a little bit to the north of the region. This part of the forecast is low confidence, and subject to much revision, so don’t give it much weight at this time.

THIS AFTERNOON…Most clouds northwest of Boston, most sun to the southeast. Highs 48-55. Wind S 10-20 MPH.
TONIGHT: Mostly cloudy. Lows 40-47. Wind SW 10-20 MPH.
MONDAY: Partly sunny. Chance of rain showers. Highs 50-57 through midday, then cooling back to the 40s. Wind SW 15-25 MPH shifting to W.
MONDAY NIGHT: Partly cloudy. Lows in the 20s except around 30 urban areas and Cape Cod. Wind NW 5-15 MPH.
TUESDAY: Mostly sunny. Highs in the 30s. Wind N 5-15 MPH.
WEDNESDAY: Cloudy. Early mix, then rain showers. Low 30. High 50.
THURSDAY: Mostly sunny. Low 20. High 35.
FRIDAY: Increasing clouds. Low 25. High 45.
WEEKEND: Mostly cloudy. Chance of rain/mix/snow. Lows around 30. Highs around 40.

Kiddie Coaster


We’re in a changing weather pattern now and it’s changing to a fairly quiet one weather-wise but quick swings in temperature, kind of like riding the kiddie coaster at the amusement park. Though we are heading into an overall milder pattern we’ll still see shots of colder air. Weak systems will pass through every couple days, warm front Saturday night, cold front Monday, warm front / cold front combo Wednesday, and another small low pressure area early Friday.

OVERNIGHT: Clear. Lows 10-25, coldest interior valleys, mildest immediate coast and urban centers. Wind light W.
SATURDAY: Increasing clouds. Highs around 35. Wind light variable.
SATURDAY NIGHT: Cloudy. Chance of very light snow early, and a very light mix overnight. Temperatures holding near 35. Wind light SE.
SUNDAY: Decreasing clouds. Highs around 50. Wind S 10-20 MPH.
MONDAY: Variably cloudy. Chance of rain showers. Low 40. High 50.
TUESDAY: Mostly sunny. Low 25. High 35.
WEDNESDAY: Mostly cloudy. Chance of rain showers. Low 30. High 50.
THURSDAY: Mostly sunny. Low 35. High 45.
FRIDAY: Variably cloudy. Chance of rain showers. Low 35. High 50.

Holiday Weekend Update


Happy Thanksgiving to you all! I realize that many people are not having a pleasant Thanksgiving due to power outages, especially in parts of NH and nearby north central MA. Hoping power is restored soon and most of the weekend can be salvaged.

Watch for icy spots this Thanksgiving morning where there has been some freeze-up of snow/slush, especially north and west of Boston!

Other than those after-effects, the pre-Thanksgiving storm is now behind us, and we look ahead. A trough will be hanging around the area today, keeping clouds dominant, though some breaks of sun will occur too. This trough will focus some moisture for a round of snow tonight and Friday morning. Though it does not look like a major snowfall, up to a few inches of fluffy snow may accumulate as it will be quite cold. This will have an impact on Black Friday shopping plans in the overnight and morning hours. Conditions will improve later Friday as the trough moves away to the south. This will set up a weekend that starts very cold Saturday after the sky clears and wind drops off Friday night. But a warm front will send more clouds into the region later Saturday and it may snow again in parts of the region Saturday evening, again a minor event. By Sunday, the sun will make a return but this time it will warm up.

Early next week, a mild Monday with a few rain showers as a cold front crosses the region. Tuesday will be cooler but dry with high pressure centered north of the region. Another warm front / cold front combo will bring unsettled but milder weather Wednesday.

TODAY – THANKSGIVING: Mostly cloudy but some intervals of sun. Highs in the 30s. Wind NW 5-15 MPH.
TONIGHT: Cloudy. Snow developing. Lows in the 20s. Wind light N.
FRIDAY: Cloudy through midday with snow eventually tapering off after accumulating a general 1 to 3 inches, but lesser amounts South Coast of MA and southern RI, and locally greater than 3 inches near some coastal areas from the South Shore to North Shore of MA. Partial clearing during the afternoon. Highs in the 30s. Wind light NE to N.
FRIDAY NIGHT: Clear. Lows from near 10 interior valleys to near 20 coastal locations and urban centers. Wind light N.
SATURDAY: Sunshine followed by increasing clouds. Chance of light snow by late afternoon with some minor accumulation possible by early at night. Highs in the 30s. Wind light variable.
SUNDAY: Clearing. Low 30. High 50.
MONDAY: Variably cloudy. Chance of rain showers. Low 40. High 50.
TUESDAY: Partly cloudy. Low 25. High 40.
WEDNESDAY: Mostly cloudy. Chance of light mix early, then rain showers. Low 30. High 50.

Storm Update / Holiday Weekend Forecast


Most of the analysis on this was done on the previous entry and it is not necessary to repeat it here. The only real change that was not apparent yesterday is a little more mid-storm warm air intrusion aloft as the center likely comes several miles closer to the coast than the consensus track had previously. Tiny difference in track, bigger difference in what falls from the sky. This means that we still see rain with higher elevation mix/snow to start but the rain/snow line also will have sleet involved in it and will oscillate a little more between the I-495 and I-95 belts before finally heading coast-ward as the storm departs. It all gets out of here from south to north tonight.

Accumulation break-down: You know the timing, here are the amounts expected.
6+ inches snow confined to higher elevations of southwestern NH and central MA westward, 3-6 inches elsewhere mainly west of I-495 with some of this possibly cut down by sleet, and under 3 inches most areas east of I-495 including northwestern RI and southeastern NH where the most flip-flopping will take place. Expecting mainly rain from Cape Ann to Boston on the immediate coast and across most of southeastern MA including Cape Cod, and eastern and southern RI. These areas may see brief mix/snow at the end of the storm with no accumulation. KEEP IN MIND: The phrase “under 3 inches” does not mean “3 inches”. It means less than 3. When seeing anything with numbers, don’t focus on just the number, but the description with it, and if you see a range, don’t focus on just the top number, but keep the range in mind.

Weak disturbance brings clouds and a few snow showers along with blustery winds for the holiday on Thursday. Other than brief lower visibility in a few snow showers, not expecting any travel troubles. But please watch for icy untreated surfaces especially in the morning! The rest of the holiday weekend goes this way: Cold Friday with some coastal snow showers from NH into eastern MA due to a disturbance, sun to clouds Saturday and clouds to sun Sunday as we undergo a warming trend.

Cold front passes Monday, no big deal. High pressure builds in Tuesday with a bit of a chill but nothing too significant.

TODAY: Overcast. Rain southeastern areas, snow northwestern higher elevations, and a combination of rain/sleet/snow in between. SEE ABOVE for accumulations. Temperatures fall to the lower 30s well northwest of Boston, middle to upper 30s most areas, some lower 40s hanging on in coastal areas especially Cape Cod. Wind NE to N increasing to 15-25 MPH with higher gusts, strongest along the coast.
TONIGHT: Precipitation ends south to north as the rain/mix/snow line finally heads east. Lows upper 20s interior higher elevations, lower to middle 30s elsewhere. Wind N to NW 15-25 MPH, higher gusts.
THURSDAY – THANKSGIVING: Lots of clouds, intervals of sun possible. Scattered snow showers but no accumulation other than a potential brief dusting in a few locations. Highs upper 30s to around 40. Wind NW 15-25 MPH, higher gusts.
THURSDAY NIGHT: Mostly cloudy. Chance of snow showers mainly eastern NH and coastal MA overnight.
Lows in the 20s. Wind NW 5-15 MPH.
FRIDAY: Mostly cloudy to partly sunny. Snow showers possible mainly eastern MA through midday with minor accumulation possible. Highs in the 30s. Wind NW 10-20 MPH.
SATURDAY: Sun to clouds. Low 15. High 40.
SUNDAY: Clouds to run. Low 30. High 50.
MONDAY: Variably cloudy. Chance of rain showers. Low 35. High 55.
TUESDAY: Mostly sunny. Low 30. High 40.

A Storm With Its Own Travel Plans


A very interesting set-up, coming out of unseasonable warmth to the threat of significant snow (for some areas) on what is essentially and somewhat arguably the busiest travel day of the year (Wednesday). You’re going to either hear or take part in great analysis over the next 24-36 hours so I’m going to take the streamlined route in the discussion here and expand upon it with you all in the comments.

First, today, another very mild day by November standards, though sun will be limited for a while due to lots of high cloudiness streaming northward, it should shine brighter a little later as clouds thin out. But these clouds will thicken back up tonight in advance of a low pressure area developing along a frontal boundary just offshore. This system will be propelled northeastward rather rapidly. With departing warm and moist air to feed the system, and arriving cold air to set up contrast, we have a short-lived by volatile set-up, complicated further by the fact that its passage by southeastern New England will take place on the eve of Thanksgiving, presenting all kinds of complexities regarding both air and road travel. As for the storm itself, it will be moving very rapidly, arriving precipitation-wise during the morning and midday and departing by around midnight. It’s what happens in that 12+ hour period that is critical. We know that it should start as rain in most areas except probably mix to immediate snow in higher elevations of central MA. And in this area it will remain generally snow, where it is likely that the most will fall, which is over 6 inches of snow. This will likely include the tricky I-90/I-84 area which is elevated, and congested on a dry weekend day outside of the holidays at times. Potential for major traffic nightmare here. It’s also quite likely that the immediate coast and down across southeastern MA, coastal RI, and Cape Cod and the Islands will remain as mostly rain, possibly mixing later in the storm as steadiest precipitation is ready to depart. It’s the whole middle section, from Boston through Metro West down into RI and up into southeastern NH and interior northeastern MA that is the most tricky. The most reliable guidance suggest marginal temperatures for the majority of the event, which means at any given time it can be raining, snowing, or both. A cop out? Not at all. It’s that marginal. We’ll just have to see how the event unfolds. There is the potential for some heavier banding features associated with the storm during its passage which would tilt the balance more toward snow where they set up. So the forecast amounts are highly subject to change in this belt. See below for those amounts…

Once the storm gets out of here, and that will happen fairly rapidly from southwest to northeast in the later evening of Wednesday. By Thanksgiving morning, it’s gone, and that day itself is going to feature a gusty breeze, lots of clouds, intervals of sun, and a few spotty snow showers with some lingering low level moisture, at least through midday.

Friday looks fair, breezy, and cold as high pressure moves in. Saturday will feature increasing clouds as a warm front approaches, and this front may produce a touch of light snow Saturday night (uncertain depending on movement of its associated disturbance and available moisture). For now it looks like a cold front will follow this up later Sunday, allowing Sunday to be milder ahead of the front. Again, timing is a little uncertain this far out. The front may still be in the vicinity Monday which may keep clouds and some threat of precipitation in the region. Plenty of time to look at that.

TODAY: Limited sun with lots of high clouds morning. More sun with less high clouds this afternoon. Highs in the 60s through midday cooling into the 50s this afternoon. Wind W 5-15 MPH.
TONIGHT: Increasing clouds. Lows upper 30s to middle 40s from southern NH to Cape Cod. Wind light W.
WEDNESDAY: Overcast. Rain develops south to north morning-midday, except mix/snow in highest elevations well west and northwest of Boston. Rain/snow line moves slowly eastward but mix/snow may also develop spontaneously closer to I-95 later in the day. Temperatures cooling through 30s northwest of Boston, from lower 40s into 30s Boston southeastward. Wind NE to N 10-20 MPH with higher gusts.
WEDNESDAY NIGHT: Cloudy. Snow northwest of Boston, mix or snow immediate Boston area southward to interior RI, mix or rain interior southeastern MA and coastal RI, and mostly rain coastal southeastern MA to Cape Cod, all ending from southwest to northeast by or shortly after midnight. Snow accumulation 6 inches or more in higher elevations central MA into southwestern NH, 3-6 inches most other interior locations west of the I-95 belt but also into interior RI with the potential for spotty higher amounts, 1-3 inches on the east side of the I-95 belt ranging down to little or nothing in coastal locations. Lows upper 20s higher elevations well inland to middle 30s Cape Cod. Wind N 10-20 MPH, higher gusts especially coastal areas.
THURSDAY – THANKSGIVING: Lots of clouds, intervals of sun. Spotty light snow showers through midday. Highs upper 30s to lower 40s. Wind NW 10-20 MPH, higher gusts.
FRIDAY: Mostly sunny. Low 25. High 35.
SATURDAY: Increasing clouds. Touch of light snow at night? Low 20. High 40.
SUNDAY: Partly cloudy. Low 30. High 50.
MONDAY: Variably cloudy. Chance of rain/snow showers. Low 35. High 45.

The Week Ahead


No, you don’t get to open the present yet, because it hasn’t even been purchased. What is that? Oh, you mean the Thanksgiving storm? Well, first of all, the storm will be gone by Thanksgiving, regardless of what its impacts are in southeastern New England. And as far as those impacts? Yes, it’s still too early to tell, as it is impossible to determine exact track and rate of development, which will be key, since this will indeed be a very fast-moving system not held up by any blocking, and working with limited cold air moving in from the west and also aloft. Why did I talk about this already? Because you would have scrolled down to find out my thoughts on it anyway, so I just saved you the trouble. So basically the forecast for this that I posted on the previous blog will stay the same for now and then as we move through Monday we can start to expand on it.

Speaking of Monday! There is a more imminent weather system to deal with. A large low pressure area cranking up and moving northeastward through the Great Lakes will send a warm front northeastward across this area early Monday, preceded by a decent slug of rain, nicely timed for your Monday morning drive, if you have to make one. But by afternoon, it will be gone, and just lots of clouds and a few spotty showers will be around. And at that time, the warm and relatively muggy air (for November) will be flowing in on a gusty southerly wind. But as “dramatic” as the warm frontal passage will be, the cold frontal passage will be so lame that you probably won’t even notice it, other than a very slow temperature drop later Tuesday. That day itself will actually still be quite mild and dry with sunshine and a few passing clouds.

Yay! I get to skip Wednesday because I already said a whole bunch of not much about that day. Seriously, though, with some uncertainty and with the importance of the day for travel, we will have to watch to see if snow becomes an issue later in the day or at night. More to come on this…

Thanksgiving: The storm will be gone, and whatever degree of impact we’ll be recovering from, the holiday itself will present a blustery chill with clouds breaking for sun. This colder trend will continue right through Black Friday and Thanksgiving Weekend. We’ll be watching for a weak clipper type system that may blow through the region at some point (timing uncertain but will guess late Saturday to early Sunday for now) with some snow showers.

OVERNIGHT: Cloudy. Rain developing southwest to northeast after 3AM. Temperatures rising into the 50s. Wind S increasing to 10-20 MPH.
MONDAY: Overcast with rain, moderate to heavy at times, pushing through the region southwest to northeast in the morning. Mostly cloudy with spotty rain showers in the afternoon. Muggy. Highs 65-70. Wind SE 10-20 MPH with gusts to 30 MPH, shifting back to S 15-25 MPH with gusts 30-40 MPH afternoon.
MONDAY NIGHT: Clouds decrease and spotty rain showers dissipate. Lows in the 50s. Wind SW 15-25 MPH, gusting over 30 MPH.
TUESDAY: Sunshine with passing clouds. Highs around 60 by midday, cooling through 50s in the afternoon. Wind W 10-20 MPH gusting to 30 MPH through early afternoon, diminishing later in the day.
WEDNESDAY: Clouding over. Rain coast, rain/snow inland late day, ending overnight as snow inland and mix/rain coast. Low 35. High 45.
THURSDAY – THANKSGIVING: Clouds and some sun. Windy. Low 30. High 40.
FRIDAY: Partly cloudy. Low 25. High 40.
SATURDAY: Sun to clouds. Risk of snow showers late. Low 25. High 35.
SUNDAY: Clouds to sun. Risk of snow showers early. Low 25. High 35.

Weekend Update


About half way through the weekend as I write this update, and not a whole lot of change at this time. Of course, media is already jumping all over a potential rain/snow threat for the Northeast for the day before Thanksgiving into early Thanksgiving morning, and while I acknowledge there is something to watch there, there is the matter of some weather to affect southeastern New England before that time. Though I am well aware that this is a huge travel week, trying to get detailed regarding the midweek threat would be a waste of time, as there are far too many uncertainties to allow one a clear enough look at things to make a confident forecast. Regarding that, I’ll play it low-key with moderate confidence but leaving the door open to significant tweaking as that time nears. In the mean time, milder air is coming in as Saturday night rolls on, and lots of clouds and even patchy showers of rain are possible. It has become mild enough for rain versus snow, as milder air has been coming in above during the day and finally at the surface overnight. By Sunday, the milder air will become more established and expect a day of sun mixed with clouds and a gusty breeze. A significant, large sized storm system is going to move northeastward through the Great Lakes on Monday and a large lobe of energy on the eastern side of it will lift through southeastern New England with rain late Sunday night and Monday morning. Most of this rain should be out of the way, though clouds will remain dominant, Monday afternoon, with very mild air. A cold front will sweep eastward across the region on Tuesday but with limited moisture to work with, so there will just be some patchy clouds around. Beyond that, the front will be the pathway for developing low pressure off the US Southeast Coast. As has been the thinking for a while, I do expect this to remain a largely open, fast-moving wave of low pressure though it may rapidly start to intensify while passing southeast to east of this area. The question of exact track and impact will not be answered for some time yet, so for now will just forecast some rain/snow for a period of time Wednesday night, ending early Thanksgiving Day. It does look like a chilly interlude to end Thanksgiving week.

TONIGHT: Mostly cloudy. Scattered rain showers. Temperatures rising slowly from upper 30s to lower 40s. Wind SW 10-20 MPH.
SUNDAY: Partly sunny. Highs in the 50s. Wind SW 5-15 MPH.
SUNDAY NIGHT: Clouding over. Rain likely by dawn. Lows in the 40s. Wind SSW 5-15 MPH.
MONDAY: Cloudy with rain and a slight chance of thunderstorms morning. Mostly cloudy with scattered rain showers afternoon. Highs in the 60s. Wind S 10-20 MPH with gusts over 30 MPH.
TUESDAY: Mostly sunny. Low 35. High 50.
WEDNESDAY: Mostly cloudy. Possible rain/mix coast, snow/mix inland at night. Low 30. High 45.
THURSDAY – THANKSGIVING: Clearing. Low 35. High 45.
FRIDAY: Variably cloudy. Chance of snow showers. Low 30. High 40.
SATURDAY: Partly cloudy. Low 25. High 40.

A Swing Thing


After a somewhat milder Thursday we’re back in the relative deep freeze (as far as November goes) for today, but the temperatures will do a swing thing heading back up in a big way between early Saturday and late Monday, which as much as a 55 degree temperature rise possible. The transition will feature wet weather (Sunday night and Monday morning). Tuesday will still be mild, though not as warm as Monday, and a couple cold fronts will then drop the temperature back toward normal as Thanksgiving approaches. The wildcard will be storm development off the coast Tuesday night and Wednesday of next week. At this time it looks like most if not all of this will remain offshore, which would be favorable for pre-holiday travel. The holiday itself still looks dry this far in advance. And with that being day 7 right now, we’ll stop there, and expand on that and look forward into Black Friday and Thanksgiving Weekend in upcoming posts.

FRIDAY: Sunny. Highs in the 30s, closest to 30 in higher elevations northwest of Boston, closest to 40 over Cape Cod. Wind WNW 15-25 MPH and gusty.
FRIDAY NIGHT: Clear. Lows 15-20 interior valleys, 20s elsewhere. Wind W 5-15 MPH.
SATURDAY: Increasing clouds. Highs around 40. Wind WSW 10-20 MPH and gusty.
SATURDAY NIGHT: Cloudy. Lows around 35. Wind SW 5-15 MPH.
SUNDAY: Clearing. Highs around 50. Wind SW 10-20 MPH and gusty.
MONDAY: Cloudy with rain AM. Breaking clouds PM. Low 48. High 68.
TUESDAY: Variably cloudy. Chance of rain showers. Low 46. High 54.
WEDNESDAY: Partly sunny. Low 33. High 46.
THURSDAY – THANKSGIVING: Mostly sunny. Low 30. High 45.

Cold & Dry Into The Weekend


The next push of early-season Arctic air will arrive later today as a cold front comes through, announcing itself only by way of a gusty breeze. And yes it is Arctic air, by definition, based on its origin. Keep in mind the time of year and that the magnitude of the cold is relative to the season. The core of this push of cold air will cross southeastern New England Friday, which will be bright but breezy and quite cold. We are still looking at a moderating trend for the weekend with a sunny Saturday and less-bright Sunday, a much milder by wet (at times) Monday, then a few rain showers but continued mild Tuesday as a cold front approaches. By Wednesday, this front will be pushing offshore and we cool to near seasonable levels with dry weather for the day-before-Thanksgiving travel. A sneak peek ahead based on reliable guidance indicates a dry and cool Thanksgiving holiday. A more comprehensive outlook for travel and holiday weekend weather will be posted in a couple days.

TODAY: Early clouds depart Cape Cod, otherwise mostly sunny. Highs in the lower 40s. Wind SW 10-20 MPH and gusty shifting to W during the afternoon.
TONIGHT: Clear. Lows around 20 northwest of Boston to around 30 Cape Cod. Wind W 10-20 MPH and gusty.
FRIDAY: Mostly sunny. Highs in the 30s. Wind WNW 15-25 MPH.
SATURDAY: Partly cloudy. Low 20. High 40.
SUNDAY: Mostly cloudy. Low 35. High 50.
MONDAY: Cloudy. Chance of rain. Low 45. High 60.
TUESDAY: Mostly cloudy. Chance of rain showers. Low 45. High 55.
WEDNESDAY: Partly cloudy. Low 35. High 50.



Sufficiently chilled yet? It’s not the Polar Vortex, it’s the Great Lake Monster, or whatever name the media will decide to give the “storm” that caused mammoth snow totals in fairly narrow bands on the lee of the Great Lakes, especially just south of Buffalo NY. To expand on that briefly, most of you know that Great Lakes snow bands are nothing new. This particular setup was just very intense, because of the magnitude of the cold so early in the season (easy to make snow) and the warmth of the water the air was passing over (more available moisture). Add them together and the result is obvious.

So, back to our weather here in southeastern New England. There is not much to add to the previous discussion. We have one cold core moving by today, with a brief and slight moderation coming Thursday as a disturbance pushes a weak warm front through the area in the overnight hours tonight with a few snow showers possible. But as the disturbance passes by to the north, its cold front will quickly sweep through the region with nothing more than a few clouds and an isolated snow shower possible, but more importantly sending another cold core across the area for Friday, along with wind.

The weekend warm-up: Yes, it is going to warm up. You won’t notice it first thing Saturday as it will be quite cold, but during the day, with less wind, moderation will begin, and a few clouds will move in. By Sunday, it will be much milder along with lots of clouds as a more solid southwesterly flow takes over.

Early next week will be mild as well, but with occasional wet weather, as broad low pressure moves through the Great Lakes.

TODAY: Sunny, with high clouds showing up in the west later in the day. Highs in the 30s. Wind SW 10-20 MPH with a few higher gusts.
TONIGHT: Clouding over west to east before midnight, a few snow showers shortly after midnight but most areas dry, then clearing west to east around dawn. Lows in the 20s north and west of Boston but remaining in the 30s to the southeast. Wind SW 10-20 MPH.
THURSDAY: Sunny to partly cloudy. Slight risk of a passing snow shower in a few locations in the afternoon. Highs in the lower 40s. Wind SW 10-20 MPH and gusty.
FRIDAY: Mostly sunny. Low 20. High 35.
SATURDAY: Partly cloudy. Low 20. High 40.
SUNDAY: Mostly cloudy. Low 35. High 50.
MONDAY: Cloudy. Chance of rain. Low 45. High 60.
TUESDAY: Mostly cloudy. Chance of showers. Low 45. High 55.

Enter The Cold


The next 5 days will feature cold and wind, along with mainly dry weather, as a broad low pressure trough moves slowly eastward across central to eastern Canada and the adjacent US Midwest to Northeast. The only precipitation threats will be from a disturbance moving along in the westerly flow that may deliver some snow showers in the early hours of Thursday, and a few stray lake effect snow showers from the Great Lakes that may survive the long trip over the mountains of NY and western New England – though this is only a slight risk. By the time we get to late in the weekend and the start of next week, a new weather pattern will emerge, and it will be a shift to mild weather.

OVERNIGHT: Clearing. Temperatures falling from the 50s to near 40 Cape Cod, 40s to near 30 elsewhere except some upper 20s north and west of Boston. Wind W increasing to 15-25 MPH with higher gusts. Watch for icy spots on ground areas that don’t dry quickly enough before freezing up.
TUESDAY: Mostly sunny to partly cloudy. Highs in the 30s. Wind W 15-25 MPH gusting over 30 MPH. Wind chill in the 20s.
TUESDAY NIGHT: Mostly clear. Lows in the 20s. Wind W 15-25 MPH and gusty. Wind chill in the teens.
WEDNESDAY: Mostly sunny. Highs in the 30s. Wind W 15-25 MPH gusting over 30 MPH. Wind chill in the 20s.
THURSDAY: Variably cloudy with snow showers early, then sunny. Low 25. High 40.
FRIDAY: Mostly sunny. Low 20. High 35.
SATURDAY: Mostly sunny. Low 18. High 40.
SUNDAY: Partly sunny. Low 30. High 50.
MONDAY: Cloudy. Periods of rain. Low 45. High 60.

The Week Ahead


The week starts wet, then goes cold, and ends with a milder trend getting underway.

Low pressure will ride up the East Coast Monday but the center of it will likely cut inland and put southeastern MA and RI into a warm sector with lots of wind by late Monday. But any warm air that floods up into that region will not hang around long, for as that low pulls away by early Tuesday, it will drag a cold front through followed by a secondary trough, with lots of wind and a significant temperature drop during Tuesday. The core of this cold will be here on Wednesday, a dry day with well below normal temperature. A disturbance will pass through during Thursday with a few clouds and perhaps a snow shower, but it looks like it will be a fast-moving, moisture-starved system, serving to just reinforce the cold (and more wind) for Friday. Once we reach the weekend, in some ways it may resemble the weekend that’s just ending, with a breezy, bright, cold Saturday, and a milder Sunday with somewhat less sunshine. This will be signaling a significant change in the pattern as we head toward Thanksgiving week, but more will be said about this in the next few days.

OVERNIGHT: Cloudy. Rain develops, may start as brief snow/ice north central MA and southwestern NH. Midnight to 3AM lows 30-40 from NW to SE with a slight rise in temperature toward dawn. Wind calm then becoming light SE to S.
MONDAY: Overcast. Periods of rain. Patchy fog. Temperatures rising to 45-55, mildest southeastern MA and RI. Wind SE to S 5-15 MPH, gusting over 20 MPH especially southeastern MA and RI.
MONDAY NIGHT: Cloudy with best chance of rain north central MA to south central NH and a few rain showers elsewhere through early evening, then a band of showers and possible thunderstorms sweeping west to east through the region late evening and offshore overnight, clouds breaking as rain ends. Temperatures rising to 55-65 most areas, warmest southeastern MA and RI, into late evening before falling back through the 40s to 30s overnight from west to east. Wind S to SW 10-20 MPH except 20-30 MPH with higher gusts over southeastern MA and RI before shifting to W 15-30 MPH with higher gusts all areas overnight.
TUESDAY: Sun and passing clouds. Highs upper 30s to middle 40s through midday then falling through 30s. Wind W 15-30 MPH with higher gusts.
WEDNESDAY: Mostly sunny and windy. Low 20. High 35.
THURSDAY: Partly cloudy and windy. Passing snow shower? Low 25. High 40.
FRIDAY: Mostly sunny and windy. Low 20. High 35.
SATURDAY: Mostly sunny. Low 20. High 40.
SUNDAY: Partly sunny. Low 25. High 50.

Winter 2014-2015 Forecast

I’ve weighed all the factors, many of which we can chat about in the comments section. I’ve come up with an educated guess for how the weather will behave during the Winter of 2014-2015 in southeastern New England. I think one of the major players this Winter will be the above normal early snowcover in Siberia, which tends to lead to more periods of negative Arctic Oscillation and North Atlantic Oscillation. I also think a fairly strong Pacific jet stream, which tends to try to flood the Lower 48 with milder air, will be a factor. A wildcard is the emergence, or lack thereof, of El Nino, which was expected last Winter, but did not show, and is expected still, but has been basically a no-show again. I believe eventually we may sneak into a very weak El Nino episode that may have a very short life span.

Putting all this together with the other indices that are important in determining weather patterns, I have come up with this outlook for the Winter.

Winter overall (December through March): Temperature slightly above normal. Precipitation below normal. Snowfall slightly below normal.

Breakdown by month…

December: Tendency for AO/NAO to be alternating between weakly negative and weakly positive, a bit of a see-saw pattern, stronger Polar jet stream, weaker Subtropical jet stream, and a lack of phasing. Expecting the mildest part of the month, relative to normal, to be the first 10 days, with a colder trend for mid month and a milder trend at month’s end. Temperature near to slightly above normal. Precipitation below normal. Snowfall below normal.

January: Strong split flow, dominant Polar jet stream with moderate to strongly negative AO/NAO, but a little weaker than average Subtropical jet stream due to the lack of emergence of El Nino. A milder trend that comes at the end of December continues to early January before a cold pattern takes over. NAO strongly negative enough to result in dry weather rather than stormy weather. Snow would come from fast-moving Polar jet stream short waves. Temperature below normal. Precipitation below normal. Snowfall below normal. This will be the month of the cold outbreaks.

February: AO/NAO starts out with a negative bias then trends more positive. Still a split flow pattern but Subtropical jet becomes more active and Polar jet weakens a little. Phasing of streams, which had been not happening too often, happens a few times and brings an increased risk of storminess, but at the same time less intrusion of Arctic air from Canada. Temperature above normal. Precipitation near to above normal. Snowfall above normal. This will be the month with the greatest risk of major snowfall, despite it being considerably “milder” than January.

March: The pattern of February may spill over into early March but then retrogression sends Winter out West as the East warms and dries ahead of seasonal normal. That means Winter departs quickly in New England. Temperature above normal. Precipitation below normal. Snowfall below normal.

So, how much snow will Boston have this Winter? The average is 44 inches. They have had above normal snowfall during the last 2 Winters. The last time they had 3 consecutive Winters with above normal snowfall? The Winters of 1975-1976, 1976-1977, and 1977-1978. I think this may be a season where some of the excitement comes from watching that number to see if we reach #3 again, but we ultimately fall just short, with 41.1 for Logan Airport, the majority of it coming in the month of February.

That’s my best guess!

Weekend Update


The discussion is basically the same as the previous so will leave it that and only add that a very minor surprise this morning was a few stray snow showers surviving all the way from the Great Lakes to the southwestern suburbs of Boston – no accumulation, only a few flakes in the air.

TODAY: Clouds and a very light snow shower southwest of Boston into mid morning, otherwise mostly sunny. Highs 35-42, coldest in higher elevations inland. Wind NW 5-15 MPH with higher gusts, shifting to W.
TONIGHT: Mostly clear evening. Mostly cloudy overnight. Lows 25-32 by midnight, may rise slightly later. Wind W under 10 MPH shifting to SW.
SUNDAY: Lots of clouds with a very slight chance of a few snow flakes morning, then partial sun by afternoon. Highs 43-50, mildest southwest of Boston. Wind SW 5-15 MPH with higher gusts.
MONDAY: Cloudy. Periods of rain, some mix possible well inland. Low 35. High 45.
TUESDAY: Sun and clouds. Rain or snow shower late day? Low 30. High 45.
WEDNESDAY: Mostly sunny. Low 25. High 35.
THURSDAY: Mostly sunny. Low 20. High 40.
FRIDAY: Sun and high clouds. Low 25. High 40.

Chill Slowly


Not a blast, but a slow easing into the coldest air of the season so far, which you still must wait until later Tuesday to see arrive. Still not a whole lot of change to the forecasts previously posted. Here though I can offer you a little more detail regarding the coming weekend. First, we get rid of the small rain to snow event, which as of the time of this writing, is basically over everywhere except rain drops and a few snow flakes on Cape Cod. Where snow did accumulate, we saw generally a coating to an inch or so, mainly on unpaved surfaces. That will melt today as the sun returns and the ground is still relatively warm. The day will turn mostly sunny as dry air moves in and the developing storm moves away. It will be chilly, but not too cold, though the breeze that develops will give the air a nip. Look for a cold night tonight under a clear sky and active breeze. The weekend will be a bit of a split, with lots of sunshine Saturday as high pressure dominates, though still breezy as there is a squeeze between high pressure centered to the southwest and low pressure more intense but far away to the northeast, and then expect a period of cloudiness and perhaps an isolated snow shower as warmer air moves in aloft. The cloudiness may actually decrease a little bit later in the day. Things are still looking the same for the first half of next week, unsettled Monday as low pressure rides up the East Coast but bringing mild enough air for a mainly rain event (still watching for some mix inland), then the coldest air of the season so far by later Tuesday and especially Wednesday, into Thursday.

TODAY: Clearing by late morning then mostly sunny. Highs in the 40s. Wind NW 10-20 MPH and gusty.
TONIGHT: Mostly clear. Lows in the 20s inland, lower 30s coast. Wind NW 5-15 MPH and gusty.
SATURDAY: Mostly sunny. Highs 40-45. Wind NW 10-20 MPH and gusty.
SATURDAY NIGHT: Clear evening. Increasing clouds overnight. Lows 30-35. Wind light W.
SUNDAY: Mostly cloudy with a slight chance of isolated light snow showers through early afternoon. Partly sunny later afternoon. Highs 40-45. Wind variable up to 10 MPH.
MONDAY: Cloudy. Periods of rain, some mix possible well inland. Low 35. High 45.
TUESDAY: Sun/clouds. Snow shower late? Low 35. High 45.
WEDNESDAY: Mostly sunny. Low 25. High 35.
THURSDAY: Mostly sunny. Low 20. High 40.