Monday Forecast

8:23AM

DAYS 1-5 (DECEMBER 31-JANUARY 4)
The final day of 2018 has arrived. The the final sunshine of the year will be this morning and maybe first thing this afternoon for parts of the region before cloudiness thickens up ahead of a quick-moving storm system that is going to symbolize much of 2018 – wet weather. Actually this system has just enough cold air to work with that it may start as snow or a mix over interior southern NH and central to northeastern MA, and for a short time where snow occurs it may even look like it would be the start of a serious snowfall, but it will be very fleeting, as warmer air takes over both at the surface and aloft and everyone is rain by the time we flip the calendar from 2018 to 2019. So if you are going to be outside somewhere to celebrate, bring the rain gear. If you are near the coast, say, in Boston, leave the umbrellas at home and wear a rain coat as the wind will be on the gusty side this evening and tonight. When we get to the first dawn of 2019, clouds and a few rain showers may still be around as we’re immersed in mild air, but a quick drying process on an increasing westerly wind behind the system will make for quite a nice New Year’s Day overall, although the mild air that starts the day will be replace as the hours go by with much colder air, so be ready for a temperature drop. High pressure will build in with dry and cold air Wednesday. A northern stream disturbance will pass through the region Thursday morning and midday and may cause a little very light snow. Later Thursday and early Friday a piece of energy will travel well south of the region, but a lagging piece of energy from the southern jet stream will phase up with a piece of energy from the northern jet stream over the Midwest and create a storm system that arrives along with milder air, bringing a good chance of rain to the region by later on Friday. It’s possible this system is slow enough so that the entirety of Friday’s daylight is dry. Will tweak timing going forward.
Forecast details…
TODAY: Increasing cloudiness. Highs 37-44. Wind S to SE up to 10 MPH.
TONIGHT (NEW YEAR’S EVE): Overcast. Rain arrives evening southwest to northeast, may start as mix/snow interior southern NH and northeastern to central MA. Rain diminishes to scattered rain showers west to east overnight. Patchy fog. Temperatures rise slowly through the 40s. Wind SE to S 5-15 MPH inland and 15-25 MPH coast evening, S to SW 10-20 MPH with higher gusts all areas overnight.
TUESDAY (NEW YEAR’S DAY): Mostly cloudy with a lingering rain shower possible very early, then a sun/cloud mix. Highs 48-55 in the morning. Temperature fall through the 40s afternoon to the upper 30s east and middle 30s west by day’s end. Wind W increasing to 15-30 MPH with gusts 40-55 MPH, strongest in higher elevations.
TUESDAY NIGHT: Partly cloudy early then clearing. Lows 18-25. Wind W 15-30 MPH with higher gusts evening, diminishing overnight
WEDNESDAY: Mostly sunny. Highs 28-35. Wind NW 5-15 MPH.
THURSDAY: Mostly cloudy with a risk of very light snow morning and midday then clearing during the afternoon. Lows from the upper 10s to lower 20s. Highs in the 30s.
FRIDAY: Clouding over. Rain arrives at night. Lows in the 20s. Highs in the 40s.

DAYS 6-10 (JANUARY 5-9)
Rain may end as snow or snow showers during January 5. A few snow showers possible January 6. Risk of light snow or flurries later January 7 and January 8 then fair and cold January 9 as the southern jet stream retreats and the polar jet, sitting mainly north of the region, sends minor systems this way.

DAYS 11-15 (JANUARY 10-14)
Unsettled weather is most likely during the second half of the period though at this point no major storms appear likely.

Sunday Forecast

8:29AM

DAYS 1-5 (DECEMBER 30-JANUARY 3)
A disturbance that had a little more punch than expected brings cloudiness and maybe a few flakes of snow to the region this morning then moves out this afternoon with sun returning. High pressure moves overhead during today and tonight with much lighter wind than we saw Saturday, and then this high moves offshore and allows a quick-moving low pressure area to bring a period of rain (which may start as a mix well north and west) to come through the region during New Year’s Eve, leaving us with a drying but mild New Year’s Day before colder air returns to the region for the second and third days of 2019.
After a complex day yesterday which featured rain, fog, and some icy spots as cold air was trapped near the ground over parts of southern NH and central MA, we are now drying out behind it all with a moderate westerly breeze today, though it starts mild and then gets colder during today and tonight and remains dry and cold but more tranquil for Sunday as high pressure builds in. But the changes will continue and as we get ready to change the calendar from 2018 to 2019 we’ll be dealing with the passage of another low pressure system, bringing mainly rain for New Year’s Eve, which is a little faster timing than I had been thinking previously. This quicker timing may lead to a much drier result for a good portion of New Year’s Day, which will be mild, before another batch of cold air arrives for the 2nd day of 2019.
Forecast details…
TODAY: Mainly cloudy with spotty light snow this morning. Clearing this afternoon. Highs 30-37. Wind light N to light variable.
TONIGHT: Clear. Lows 12-19. Wind light variable.
MONDAY: Increasing cloudiness. Highs 35-42. Wind light variable to light SE.
MONDAY NIGHT (NEW YEAR’S EVE): Overcast. Rain arriving southwest to northeast, may start as brief mix well north and west of Boston. Lows 32-39 early then rising to the 40s overnight. Wind SE increasing to 10-20 MPH with higher gusts, strongest Cape Cod.
TUESDAY (NEW YEAR’S DAY): Mostly cloudy with rain showers possible early, then a sun/cloud mix. Highs 50-57. Wind W 10-20 MPH.
WEDNESDAY & THURSDAY: Mostly sunny to partly cloudy. Lows in the 10s. Highs in the 30s.

DAYS 6-10 (JANUARY 4-8)
A storm system with a combination of northern and southern jet stream energy is likely to pass through the region with a snow or mix to rain situation on January 4, exiting and followed by colder and drier weather January 5, but a disturbance may bring snow showers with continued cold air January 6 followed by dry weather January 7 and the threat of the next disturbance bringing precipitation by January 8.

DAYS 11-15 (JANUARY 9-13)
Drier with near to below normal temperatures January 9-11, with the next threat of unsettled weather coming by late in the period.

Saturday Forecast

11:07AM

DAYS 1-5 (DECEMBER 29-JANUARY 2)
After a complex day yesterday which featured rain, fog, and some icy spots as cold air was trapped near the ground over parts of southern NH and central MA, we are now drying out behind it all with a moderate westerly breeze today, though it starts mild and then gets colder during today and tonight and remains dry and cold but more tranquil for Sunday as high pressure builds in. But the changes will continue and as we get ready to change the calendar from 2018 to 2019 we’ll be dealing with the passage of another low pressure system, bringing mainly rain for New Year’s Eve, which is a little faster timing than I had been thinking previously. This quicker timing may lead to a much drier result for a good portion of New Year’s Day, which will be mild, before another batch of cold air arrives for the 2nd day of 2019.
Forecast details…
TODAY: Sun dominates through midday then sun and passing clouds. Temperatures gradually fall, reaching the 30s by late day. Wind W 10-20 MPH with higher gusts.
TONIGHT: Clearing. Lows 15-22. Wind NW 10-20 MPH, higher gusts. Wind chill below 10 at times.
SUNDAY: Mostly sunny. Highs 28-35. Wind light N.
SUNDAY NIGHT: Clear. Lows 12-19. Wind light variable.
MONDAY (NEW YEAR’S EVE): Sunshine followed by increasing clouds. Risk of mix to rain at night. Highs 37-44. Wind light S.
TUESDAY (NEW YEAR’S DAY): Sun/cloud mix. Breezy. Temperatures rise to 50s morning, fall to 40s afternoon.
WEDNESDAY: Mostly sunny. Lows in the 10s. Highs in the 30s.

DAYS 6-10 (JANUARY 3-7)
Watching a storm system for around January 4 that should pass out to the south but it remains to be seen if it gets close enough to spread cloudiness and a snow threat into southern areas. A disturbance may bring snow showers or a period of snow around January 6. Otherwise, a colder/drier pattern evolves.

DAYS 11-15 (JANUARY 8-12)
Disturbances may bring snow showers around January 8 and 10 and a larger system may bring precipitation by the end of the period. Low confidence forecast at this time.

Friday Forecast

7:48AM

DAYS 1-5 (DECEMBER 28-JANUARY 1)
Slippery spots from snow and a little freezing rain in portions of north central MA and southern NH will disappear as the temperature goes up this morning, otherwise its a wet Friday, though not an excessive rain producer this time. No changes to the weekend forecast at this time as we see it dry out, start mild, and end cold. A little unsure on the timing of the next system, which looks like mainly rain as milder air will rapidly advance back into the region New Year’s Eve and New Year’s Day. For now will split the difference with a forecast of it becoming wet before we lose 2018 and staying wet into the morning of the first day of the new year.
Forecast details…
TODAY: Overcast with rain likely morning and midday except early freezing rain north central MA and southwestern NH. Rain tapering off late day when clouds may break. Highs 47-54 occurring late day. Wind E increasing to 10-20 MPH shifting to S by late in the day.
TONIGHT: Variably cloudy. Patchy fog. Temperatures fall back slightly into the 40s. Wind S to SW 5-15 MPH.
SATURDAY: Variably cloudy. A passing rain shower possible early. A passing snow shower possible late. Temperatures fall 40s to 30s. Wind W 10-20 MPH with higher gusts.
SATURDAY NIGHT: Clearing. Lows 15-22. Wind NW 10-20 MPH, higher gusts. Wind chill below 10 at times.
SUNDAY: Mostly sunny. Highs 28-35. Wind NW 10-20 MPH. Wind chill near to below 20 at times.
MONDAY (NEW YEAR’S EVE): Sunshine followed by increasing clouds. Risk of mix to rain at night. Lows in the 10s. Highs from the upper 30s to lower 40s.
TUESDAY (NEW YEAR’S DAY): Cloudy with rain/drizzle morning. Partial clearing afternoon. Temperatures rise to the 40s to lower 50s then steady.

DAYS 6-10 (JANUARY 2-6)
Earlier thinking was that we may be in a stretch of unsettled weather but current thinking is we may end up drier between split jet streams, one to the north, one to the south. Can’t rule out some unsettled weather at some point in this period, however.

DAYS 11-15 (JANUARY 7-11)
A colder and overall drier pattern but a risk of snow showers about every other day from passing polar jet stream disturbances.

Thursday Forecast

7:24AM

DAYS 1-5 (DECEMBER 27-31)
We’re down to 5 days left of 2018, and they will present a set of changes in the weather typical of the region we live in. It starts out with a tranquil day today as high pressure overhead slides off to the east. Low pressure traveling through the Midwest will track north of England by late Friday, dragging a warm front across the region. The precipitation with this front will fall mainly as rain, although it will likely start as a period of snow and some sleet north and west of Boston where a minor accumulation is possible especially in higher elevations. The cold front from this system will cross the region early Saturday with no more than a rain shower and a mild start to the day will then be followed by falling temperatures, a gusty breeze, and perhaps a snow shower to end the day as a trough passes by. A cold Canadian high pressure area will build in for Sunday, which now looks like a dry day with any weak low passing well to the south. By the time we get to the final day of 2018, we’ll have another low pressure area approaching from the southwest, spreading cloudiness into the region. It remains to be seen if any precipitation will arrive before the clock strikes midnight, but if it did it would likely be snow. With this being a few days away, this is definitely not a high confidence forecast at this point, just something to keep an eye on.
Forecast details…
TODAY: Sunshine and high clouds. Highs 33-40. Wind light variable.
TONIGHT: Clouding over. Snow/sleet north and west of Boston, mix/rain elsewhere, developing pre-dawn, with a minor accumulation of 1 inch or less possible in areas that get snow. Lows 22-28 north, 28-34 south during the evening then rising slowly overnight. Wind light N to E.
FRIDAY: Overcast with rain likely morning and midday. Rain tapering off late day when clouds may break. Highs 47-54 occurring late day. Wind E increasing to 10-20 MPH shifting to S by late in the day.
FRIDAY NIGHT: Variably cloudy. Patchy fog. Temperatures fall back slightly into the 40s. Wind S to SW 5-15 MPH.
SATURDAY: Variably cloudy. A passing rain shower possible early. A passing snow shower possible late. Temperatures fall 40s to 30s. Wind W 10-20 MPH with higher gusts.
SUNDAY: Mostly sunny. Lows from the upper 10s to lower 20s. Highs from the upper 20s to lower 30s.
MONDAY (NEW YEAR’S EVE): Sunshine followed by increasing clouds. Risk of snow late at night. Lows in the 10s. Highs in the 30s.

DAYS 6-10 (JANUARY 1-5)
An unsettled start to 2019 with a risk of mix to rain January 1 into January 2 then a risk of mix to snow January 3 into January 4, with fair and colder weather to end the period.

DAYS 11-15 (JANUARY 6-10)
A colder and overall drier pattern but a risk of snow showers about every other day from passing polar jet stream disturbances.

Wednesday Forecast

7:26AM

DAYS 1-5 (DECEMBER 26-30)
Christmas Day may be over but the Christmas season goes on, with many folks on mini work vacations and still doing tours of lights displays, etc. during the course of the week between Christmas Day and New Year’s Day, so the weather remains important for planning such things. During this 5-day period there are a couple of events that may have some impact on plans. After a couple dry and seasonably cold midweek days, a low pressure area will move rapidly from the Upper Midwest to southeastern Canada Friday through early Saturday. Enough cold air at the onset of this system early Friday should allow a start as snow/sleet for at least northern and interior areas of southeastern New England, but warmer air advancing will mean that it turns out as rain for the balance of the system. A cold front will come through during Saturday, and similar to the Saturday before it, expect a day of drying weather and a mild start with a colder finish. This sets up the possibility of some snow on Sunday, with cold air in place, depending on the track of a clipper low pressure system.
Forecast details…
TODAY: Sun and passing clouds. Highs 33-40. Wind N 5-15 MPH, higher gusts.
TONIGHT: Partly cloudy evening. Clear overnight. Lows 11-18. Wind light N.
THURSDAY: Sunshine and high clouds. Highs 33-40. Wind light variable.
THURSDAY NIGHT: Clouding over. Snow/sleet developing pre-dawn, except rain/mix South Coast. Lows 22-28 north, 28-34 south. Wind light N to E.
FRIDAY: Overcast. Snow and sleet changing to rain morning-midday. Rain showers likely afternoon-evening. Snow/sleet accumulation of a coating to 2 inches except little or no accumulation South Coast. Highs 40-46 occurring late-day. Wind E to SE 10-20 MPH.
SATURDAY: Sun/cloud mix. Windy. Chance of a rain shower morning. Chance of a snow shower late-day. Temperatures rise to lower 50s early then fall through the 40s during the day, 30s early evening, into the 20s late evening.
SUNDAY: Mostly cloudy. Chance of snow, favoring southern areas. Temperatures steady in the 20s.

DAYS 6-10 (DECEMBER 31-JANUARY 4)
A dry December 31 will be followed by a pattern of unsettled weather that favors rain initially and possibly mix/snow toward the end during the first few days of 2019.

DAYS 11-15 (JANUARY 5-9)
A couple systems may bring light precipitation around January 6 and 8 otherwise overall dry weather with temperatures near to below normal.

Tuesday Forecast

11:24AM

To all of you who celebrate, I wish you a Merry Christmas!

DAYS 1-5 (DECEMBER 25-29)
High pressure builds in for a bright and seasonably chilly Christmas Day and continues to dominate the weather through the middle of the week. A weak trough moving north to south across the region from eastern Canada on Wednesday may bring a few clouds to region. The next low pressure system will travel southwest to northeast from the Upper Midwest to southeastern Canada on Friday, a track putting New England on the warm side, and a warm front / cold front combo will bring wet weather at that time. There could be just enough cold air around at the start of the precipitation early Friday, that some areas, especially interior and higher elevations, see some snow and/or ice, but this should not be long-lasting and its impact, if it occurs, will be determined by timing. By Saturday, this system will be departing and we’ll have a blustery and drier day that starts mild and ends colder.
Forecast details…
TODAY: Sunny. Highs 33-40. Wind NW 10-20 MPH with a few higher gusts.
TONIGHT: Clear. Lows 13-20. Wind NW 5-15 MPH with a few higher gusts.
WEDNESDAY: Sun and passing clouds. Highs 33-40. Wind N 5-15 MPH, higher gusts.
WEDNESDAY NIGHT: Partly cloudy evening. Clear overnight. Lows 11-18. Wind light N.
THURSDAY: Sunshine and high clouds. Highs 33-40. Wind light variable.
FRIDAY: Overcast. Snow and sleet changing to rain morning-midday. Rain showers likely afternoon-evening. Lows in the 20s. Highs in the 40s.
SATURDAY: Sun/cloud mix. Windy. Chance of a rain shower morning. Chance of a snow shower late-day. Temperatures rise to lower 50s early then fall through the 40s.

DAYS 6-10 (DECEMBER 30-JANUARY 3)
A clipper passing south of the region December 30 may be close enough to bring snow to at least southern areas. Dry and chilly December 31. Milder with episodes of rain January 1-3 as a boundary sets up over the region and areas of low pressure move along it.

DAYS 11-15 (JANUARY 4-8)
Colder with a risk of mix/snow early period and again at the end of the period with dry weather in between.

Monday Forecast

8:34AM

DAYS 1-5 (DECEMBER 24-28)
On this day before Christmas, a 2-part disturbance will bring the only chance of getting snow on the ground before Santa’s visit. We all know Santa doesn’t need snow to visit, but many people like to see it for festive reasons. Well, part 1 of the system failed mainly to dry air, but did produce a coating of snow along parts of the South Coast and nearby areas. This was an area I was concerned may have light rain instead of snow, but everything was pushed a bit further south, the air was slightly colder, and snow fell there but nothing to the north. The second part of the system is a strong upper level disturbance that will generate snow showers this afternoon and evening. Accumulations of snow will occur in bands and be on the order of a coating to 1 inch. Sometimes in a set-up such as this a localized band may over-produce, so that will be something to watch for. The favored areas for snow this afternoon and evening will be eastern MA and southern NH. By late evening, it’s all gone, the moon will be shining, and a seasonable chill will be in place, lasting through the holiday on Tuesday which will feature bright sunshine. High pressure building in from the west will continue this weather through the middle of the week. A fast-moving low pressure area will move in during Friday, but along with the arrival of milder air behind now offshore high pressure, this will bring rain to the region, not snow. Not expecting this one to be a prolific rain producer.
Forecast details…
TODAY: Mostly cloudy. Brief very light snow South Coast / Cape Cod early. Snow showers this afternoon with a coating to 1 inch possible. Highs 35-42. Wind light variable morning, N 5-15 MPH but higher gusts this afternoon.
TONIGHT (CHRISTMAS EVE): Variably cloudy with snow showers eastern MA and southern NH early, a few snow showers possible in RI as well. Clearing late evening. Lows 17-24. Wind NW 5-15 MPH with higher gusts.
TUESDAY (CHRISTMAS DAY): Mostly sunny. Highs 33-40. Wind NW 5-15 MPH.
WEDNESDAY: Partly cloudy. Lows in the 10s. Highs in the 30s.
THURSDAY: Mostly sunny. Lows in the 10s. Highs in the 30s.
FRIDAY: Cloudy. Rain likely. Temperatures rise 30s to 40s.

DAYS 6-10 (DECEMBER 29-JANUARY 2)
Dry weather expected December 29 but delaying the cold air’s arrival so that should be an above normal temperature day as well. The remainder of the period is in question as it looks like a couple disturbances or a more organized system could affect the region with rain and/or snow. Guidance is all over the place here and the type of pattern it is doesn’t lead me to have any more confidence either so will basically punt on this today and re-evaluate for tomorrow’s update.

DAYS 11-15 (JANUARY 3-7)
This period may start unsettled then should trend drier with temperatures near to below normal.

Sunday Forecast

8:14AM

DAYS 1-5 (DECEMBER 23-27)
High pressure will bring bright, dry, and seasonably cold weather to the region today, perfect for any last minute shopping or an evening drive around to view the lights. A weak and fast-moving low pressure area but with decent upper level support will move across the region Monday, Christmas Eve, producing a minor snow event, although initially it will be too mild to support snowfall along the South Coast. High pressure builds in on Tuesday, Christmas Day, and gradually slides toward the region, moving overhead by Thursday, with dry and seasonably cold weather for the holiday and midweek.
Forecast details…
TODAY: Mostly sunny. Highs 35-42. Wind W 5-15 MPH.
TONIGHT: Increasing clouds. Lows 25-32. Wind light variable.
MONDAY: Cloudy morning with a period of snow accumulating a coating to 1 inch except rain that may mix with snow South Coast. Variably cloudy afternoon with snow showers likely with additional dustings of snow possible. Highs 35-42. Wind variable 5-15 MPH morning, N 10-20 MPH afternoon.
MONDAY NIGHT (CHRISTMAS EVE): Partly cloudy with a chance of snow flurries in eastern areas early, otherwise mostly clear. Lows 17-24. Wind NW 5-15 MPH with higher gusts.
TUESDAY (CHRISTMAS DAY): Mostly sunny. Highs 33-40. Wind NW 5-15 MPH.
WEDNESDAY: Partly cloudy. Lows in the 10s. Highs in the 30s.
THURSDAY: Mostly sunny. Lows in the 10s. Highs in the 30s.

DAYS 6-10 (DECEMBER 28-JANUARY 1)
Low pressure will likely pass north of the region bringing a warm front / cold front combo to the region December 28 with a period of rain then a chance of rain showers. Breezy, chilly, drier weather returns December 29. Will watch a wave of low pressure that may bring a period of mix and/or snow to the region December 30 before dry weather to end 2018. Unsettled weather may return as early as the first day of 2019.

DAYS 11-15 (JANUARY 2-6)
A boundary nearby may be the focus for a string of low pressure areas to bring unsettled weather in the form of several periods of precipitation of several varieties for at least a portion of this period.

Saturday Forecast

9:34AM

DAYS 1-5 (DECEMBER 22-26)
The dry-out process begins today, but not until a cold front sweeps eastward across the region this morning and very early afternoon with thin band of rain showers and trailed by a few additional ones. The mild air in place will be replaced by seasonable cold tonight and Sunday, along with dry weather. A small clipper low pressure system will bring some light snow/rain (depending on location) for the morning hours of Monday and then some snow showers lingering during the afternoon adding some festive flakes to the Christmas Eve atmosphere. Seasonably cold and dry weather is then expected for Christmas Day Tuesday and Wednesday as well as high pressure builds in.
Forecast details…
TODAY: Mostly cloudy through midday with a line of rain showers moving west to east across the region mid morning through very early afternoon and one or two additional rain showers possible just behind it. Becoming partly sunny by mid afternoon. Temperatures steady 48-55 morning, falling through the 40s afternoon. Wind SW shifting to W 15-25 MPH with higher gusts possible.
TONIGHT: Clearing. Lows 28-35. Wind WNW 15-25 MPH evening, diminishing overnight.
SUNDAY: Mostly sunny. Highs 35-42. Wind W 5-15 MPH.
SUNDAY NIGHT: Increasing clouds. Lows 25-32. Wind light variable.
MONDAY (CHRISTMAS EVE): Cloudy morning with a period of snow accumulating a coating to 1 inch except rain that may mix with snow South Coast. Variably cloudy afternoon with a chance of snow showers, favoring southern NH and eastern MA. Highs 35-42. Wind variable 5-15 MPH morning, N 10-20 MPH afternoon.
TUESDAY (CHRISTMAS DAY): Mostly sunny. Lows from the upper 10s to middle 20s. Highs in the 30s.
WEDNESDAY: Mostly sunny. Lows in the 10s. Highs in the 30s.

DAYS 6-10 (DECEMBER 27-31)
High pressure hangs on with fair/cold weather December 27 before a west-to-east moving low pressure system brings mix/rain December 28. Clearing, breezy, seasonably cold December 29. Currently staying with a dry forecast for December 30-31 but a boundary not far south of the region may change that and allow a wave of low pressure to get close enough for a period of snow/mix. Will keep an eye on this.

DAYS 11-15 (JANUARY 1-5)
A boundary nearby may be the focus for a string of low pressure areas to bring unsettled weather in the form of several periods of precipitation of several varieties to start off the new year.