DAYS 1-5 (APRIL 27 – MAY 1)

The final disturbance to impact our region as it rotates around an upper level low pressure area will do so today with lots of clouds and a shower threat, and then the system finally makes its exit to the east by tonight. High pressure builds in for Friday giving our region a very nice spring day. A complex low pressure system then arrives for the weekend, but it will be slow to do so with high pressure hanging on and holding the rain from the initial system at bay for a good part of Saturday. The low center from this system will be weakening and eventually be pushed eastward, just to our south, on Saturday night as its lingering rain shield finally moves in. We’ll have to wait for a second low, this one stronger, to wheel its way up the Appalachian Mountains and into the eastern Great Lakes later Sunday for a more solid surge of showery rain in the region. This system will then move into southeastern Canada by Monday, but as its broad upper level low pressure circulation moves into and over our region, there can still be showers despite some drier air working in.

TODAY: Lots of clouds with limited sunshine. Chance of showers, especially midday to mid afternoon. Highs 51-58, coolest in coastal areas. Wind variable, mainly SE to SW up to 10 MPH.

TONIGHT: Decreasing clouds. Lows 40-47. Wind variable to N up to 10 MPH.

FRIDAY: Mostly sunny. Highs 53-60. Wind N up to 10 MPH shifting to E.

FRIDAY NIGHT: High clouds arrive. Lows 36-43. Wind E under 10 MPH.

SATURDAY: Filtered sun to start, thicker clouds follow. Light rain may reach eastern CT and central MA by late-day. Highs 53-60, coolest coast. Wind E 5-15 MPH.

SATURDAY NIGHT / SUNDAY: Cloudy. Periods of rain. Areas of fog. Temperatures generally 45-52. Wind E-SE 5-15 MPH inland, 10-20 MPH coast, higher gusts possible at times.

SUNDAY NIGHT: Cloudy. Showers likely. Slight chance of thunderstorms. Temperature rise slowly into 50s. Wind SE-S 10-20 MPH with higher gusts.

MONDAY: Variably cloudy. Chance of showers, especially early in the day. Highs 60-67, coolest South Coast. Wind S-SW 10-20 MPH, higher gusts.

DAYS 6-10 (MAY 2-6)

Once again our weather pattern will feature upper level low pressure in the region with near to below normal temperatures and occasional chances for showers, but rain-free the majority of the time.

DAYS 11-15 (MAY 7-11)

Still indications of the mean trough position lingering in the Northeast but trending slightly east with time. This translates into no big warm-ups, but overall dry weather and limited rain chances.

DAYS 1-5 (APRIL 26-30)

Upper level low pressure will continue its influence on our weather for 2 more days. We start today with marine layer stratus in place across most of the WHW forecast area – though with some holes in the cloud cover especially in the western reaches of the region around the Connecticut Valley. I do expect this cloud cover to erode further as the sun climbs into the sky, for at least a partly sunny resolution, if not mostly sunny for a while, but the same sun that gave the heating to break up the stratus will provide heat that ignites cumulus clouds development, and with another disturbance approaching as it rotates around the upper low, this can help give rise to a few showers in the region later. I do think today’s shower activity will turn out a little less potent and with less coverage than yesterday’s did. With some easterly component to the wind this afternoon and especially through Thursday, the tendency for marine layer stratus to move onshore will be there, extending inland at times as well. I do think the shower threat will be lower on Thursday, though, but there can be a patch of drizzle here and there with more moisture from the ocean in the lowest levels of the atmosphere. Finally, as the upper low pulls away and a weak area of high pressure moves in, we should see more substantial clearing for Friday, although sun’s heating will likely still help to pop some diurnal cumulus clouds, preventing 100% sun. Still, Friday seems to be the pick of the week. And then the weekend dilemma: Guidance in the medium range has been kind of on the same page about unsettled weather returning, but then during yesterday’s runs became more in agreement about a pair of low pressure areas impacting the region as we head through the last couple days of April (and May 1), with the first of them arriving on Saturday (April 29). At that point we will have a ridge of high pressure having been over the region on Friday, and still some blocking in the atmosphere. Sometimes the guidance does not resolve this blocking strongly enough, and even though we do have some agreement in the guidance, as of this update I am going to bank on the aforementioned error being part of a model tendency to bring the initial low in too quickly, so I am going to forecast dry daylight hours Saturday, with increasing clouds as the initial low starts to weaken while running into high pressure, with some of its lingering rain reaching the region during Saturday night, and the second low actually being faster and becoming the one main system, bringing wet weather into the region during Sunday. This is not a super-high confidence forecast, obviously, but my initial guess for the end of the 5-day, and subject to adjustment over the next few updates. Just plan on an unsettled weekend, but one that may start out “ok”.

TODAY: Mostly cloudy to partly sunny. Chance of a shower later in the day. Highs 52-59, coolest coast. Wind N-NE up to 10 MPH.

TONIGHT: Partly to mostly cloudy. Chance of a shower. Lows 42-49. Wind NE-E up to 10 MPH.

THURSDAY: Mostly cloudy. Chance of a shower early. Patchy drizzle possible, especially in coastal areas. Highs 50-57, coolest coast. Wind E-SE up to 10 MPH.

THURSDAY NIGHT: Decreasing clouds. Lows 40-47. Wind variable to N up to 10 MPH.

FRIDAY: Sun/cloud mix. Highs 55-62. Wind N 5-15 MPH.

FRIDAY NIGHT: Mostly clear. Lows 36-43. Wind NE under 10 MPH.

SATURDAY: Sun followed by clouds. Highs 53-60. Wind E 5-15 MPH.

SATURDAY NIGHT / SUNDAY: Cloudy. Periods of rain. Areas of fog. Temperatures generally 45-52. Wind E-SE 5-15 MPH inland, 10-20 MPH coast, higher gusts possible at times.

DAYS 6-10 (MAY 1-5)

Going against model trends of two separate low pressure areas, with the second one impacting the region on May 1, for a forecast that shows improvement that day as a singular storm system from the day before departs, but upper level low pressure is again set to linger in the region for a good portion if not throughout this period with near to below normal temperatures and occasional shower chances.

DAYS 11-15 (MAY 6-10)

General idea remains that the Northeast will see a trough of low pressure in place with a trend for it to slide eastward with time, keeping it cooler than normal overall and with limited and decreasing shower chances over time.

DAYS 1-5 (APRIL 25-29)

A slow-moving upper level low pressure area will be the main player in our weather the next few days with a varying amount of clouds and some shower chances at times. Late this week this feature will depart to the east, allowing a weak high pressure ridge to take its place with fair weather, but with high pressure at the surface off to the northeast, don’t expect a big warm up.

TODAY: Partly sunny. Scattered afternoon showers that can be mixed with graupel. Highs 51-58. Wind NW 5-15 MPH.

TONIGHT: Variably cloudy. Chance of a shower early. Lows 42-49. Wind NW 5-15 MPH.

WEDNESDAY: Partly sunny. Chance of a shower, mainly during the afternoon. Highs 52-59. Wind NW 5-15 MPH.

WEDNESDAY NIGHT: Partly cloudy. Slight chance of a shower early. Lows 38-45. Wind NW 5-15 MPH.

THURSDAY: Mostly cloudy. Chance of a few showers and a touch of drizzle. Highs 50-57, coolest coast. Wind variable up to 10 MPH becoming E.

THURSDAY NIGHT: Mostly cloudy. Chance of a shower early. Lows 40-47. Wind variable up to 10 MPH.

FRIDAY: Sun/cloud mix. Highs 55-62. Wind N 5-15 MPH.

FRIDAY NIGHT: Mostly clear. Lows 36-43. Wind NE under 10 MPH.

SATURDAY: Sun followed by clouds. Highs 53-60. Wind E 5-15 MPH.

DAYS 6-10 (APRIL 30 – MAY 4)

A new low pressure system approaches from the southwest with greater rain chances for April 30 and/or May 1. Upper level low pressure hangs around again after that with cool and sometimes unsettled conditions.

DAYS 11-15 (MAY 5-9)

Despite hints of no major storms, upper level troughing should keep big warm-ups away during this time.

DAYS 1-5 (APRIL 24-28)

Upper level low pressure moves from the Great Lakes into the Northeast early this week and will take until later in the week to exit the region. Surface low pressure, albeit weak, is close enough to keep us mainly cloudy today with more of a cloud/sun mix for the days following this. An exception may be Thursday when an additional disturbance arriving to join the upper low may turn it cloudier than the two days that flank it. We’ll see about that. Rainfall will be limited, with just some areas of showers associated with the nearby surface low today, and maybe a patch of drizzle especially near the coast. After this, mostly isolated to scattered showers occur daily, a few of them potentially producing frozen precipitation if heavy enough, due to the cold air aloft associated with the upper level low.

TODAY: Mainly cloudy. Episodes of showers possible. Patchy coastal drizzle. Highs 50-57, coolest coastal NH & eastern MA. Wind N to variable up to 10 MPH.

TONIGHT: Mostly cloudy. A shower possible early.Lows 43-50. Wind variable to NW up to 10 MPH.

TUESDAY: Partly sunny. Scattered afternoon showers that can be mixed with graupel. Highs 51-58. Wind NW 5-15 MPH.

TUESDAY NIGHT: Variably cloudy. Chance of a shower early. Lows 42-49. Wind NW 5-15 MPH.

WEDNESDAY: Partly sunny. Chance of a shower, mainly during the afternoon. Highs 52-59. Wind NW 5-15 MPH.

WEDNESDAY NIGHT: Partly cloudy. Slight chance of a shower early. Lows 38-45. Wind NW 5-15 MPH.

THURSDAY: Mostly cloudy. Chance of a few showers and a touch of drizzle. Highs 50-57, coolest coast. Wind variable up to 10 MPH becoming E.

THURSDAY NIGHT: Mostly cloudy. Chance of a shower early. Lows 40-47. Wind variable up to 10 MPH.

FRIDAY: Sun/cloud mix. Highs 55-62. Wind N 5-15 MPH.

DAYS 6-10 (APRIL 29 – MAY 3)

Low confidence forecast. Optimistic about high pressure keeping it dry for most of the April 29-30 weekend but not as sure about the second day. Unsettled with low pressure in the region May 1-2 with drier weather following. Temperatures near to below normal.

DAYS 11-15 (MAY 4-8)

Still some hints of a quieter period of weather evolving here with a relaxing of the trough and a bit more westerly flow and high pressure dominance, but this also continues to be a low confidence forecast.

DAYS 1-5 (APRIL 23-27)

This Sunday update finds no big changes to the forecast made yesterday. Low pressure approaches and will be redeveloping over the region today into Monday along an occluded frontal boundary moving into the region. This front carries with it a fairly narrow but potent band of showers and embedded thunderstorms that will move its way slowly across the region, but is wide enough to impact most of the region for a good part of the day. Ahead of it there are scattered showers and a few downpours, which initially moved in late last night. So basically a wet and cool Sunday for us – but despite its poor timing with regard to the weekend, the rain will be a general benefit as the region is running between 1 and 2 1/2 inches below normal for precipitation for the month of April and has been generally dry since late winter. With a closed off upper level low pressure area driving this system still having to slowly cross the region during the first few days of the week, we’ll continue to see an unsettled weather pattern with a daily shower chance – most numerous Monday, a little less so thereafter and decreasing by midweek as the low pressure area starts to move further to the east. However, by the time we get to Thursday, the orientation of surface features, with a surface high to the northeast of the area and another low pressure area starting to approach from the southwest, a renewed onshore wind may mean more clouds and potentially damp weather returning.

TODAY: Overcast. Band of widespread showers and a slight chance of thunder traversing slowly eastward across the region (scattered showers ahead of it far eastern areas early), tapering off western to central areas later in the day and eastern areas by the very end of the day. Highs 48-55. Wind E 5-15 MPH, gusts 20-30 MPH, strongest in coastal areas.

TONIGHT: Cloudy. Areas of fog/drizzle. Chance of a few additional showers. Lows 45-52. Wind variable up to 10 MPH.

MONDAY: Mostly cloudy. Episodes of showers. Highs 49-56, coolest coast of NH and eastern MA. Wind N 5-15 MPH.

MONDAY NIGHT: Mostly cloudy. Chance of showers. Lows 43-50. Wind N-NW 5-15 MPH.

TUESDAY: Mostly cloudy. Chance of showers. Highs 51-58. Wind NW 5-15 MPH.

TUESDAY NIGHT: Variably cloudy. Chance of a shower. Lows 42-49. Wind NW 5-15 MPH.

WEDNESDAY: Variably cloudy. Chance of a shower. Highs 52-59. Wind NW 5-15 MPH.

WEDNESDAY NIGHT: Partly cloudy. Slight chance of a shower. Lows 38-45. Wind NW 5-15 MPH.

THURSDAY: Mostly cloudy. Chance of drizzle and possibly a shower. Highs 48-55, coolest coast. Wind E 5-15 MPH.

DAYS 6-10 (APRIL 28 – MAY 2)

This is not the highest confidence forecast with several factors in play, some yet to be determined. Eyeing another low to the south that can impact the region early in the period with additional broad onshore flow and damp/wet weather, and another potential impact from a trough from the west mid to late period, with the opportunity to squeeze in a fair weather day, perhaps. Will sort this out as it gets closer. General temperature trend is near to below normal.

DAYS 11-15 (MAY 3-7)

A few hints of a quieter period of weather evolving here with a relaxing of the trough and a bit more westerly flow and high pressure dominance, but this is also a low confidence forecast. At this time of year and in this particular upcoming pattern there are many players that can change the outlook, so stay tuned for adjustments as needed.

Happy Earth Day! Take care of our world. It’s the only one we have!

DAYS 1-5 (APRIL 22-26)

The mainly fair weather of the last few days becomes much less fair and increasingly foul this weekend in response to an approaching low pressure trough. The evolution of this feature over the coming days will scream “springtime!” and not meaning the kind of weather where you are thinking sunshine, warm air, and flowers. As low pressure both surface and aloft move into the Great Lakes region during the course of this weekend, first we just see lots of cloudiness but no precipitation during the day today. As an occluded front approaches the region and slows down tonight through Sunday, our rain chances go up, in the form of isolated to scattered showers tonight, then a more general ribbon of showery rain with even the potential for some embedded thunderstorms on Sunday. With still some slow eastward movement of the feature, the more widespread and heaviest activity will occur along a fairly narrow axis that will shift to allow a tapering off of the activity slowly from west to east during the afternoon and early evening. But for all intents and purposes, Sunday can be considered a “wash-out”, as the term goes. A weak low pressure area will form on the boundary as it is crossing the region, and winds that are blowing out of the east on Sunday with some moderate gusts along the coast will become lighter and more variable and it is during Sunday night when we may see some foggy weather across the region. During the first few days of the coming week, cut off upper level low pressure will drift eastward from the Great Lakes through the Northeast while surface low pressure migrates toward the Gulf of Maine then redevelops further east and north with time. This weather pattern is unsettled and cool, with a daily chance of showers – greatest chance Monday then gradually decreasing each day after.

TODAY: Mainly cloudy – a brief break of sun is possible in a few locations. Highs 53-60 coastal plain, 60-67 well inland. Wind SE 5-15 MPH.

TONIGHT: Cloudy. Isolated to scattered showers during the evening. Scattered to numerous showers arriving from west to east later at night. Lows 45-52. Wind SE-E 5-15 MPH, higher gusts along the coast by dawn.

SUNDAY: Overcast. Widespread showers and a slight chance of thunder, gradually tapering off from west to east during the course of the afternoon. Highs 48-55. Wind E 5-15 MPH, gusts 20-25 MPH in coastal areas.

SUNDAY NIGHT: Cloudy. Areas of fog/drizzle. Chance of showers. Lows 45-52. Wind variable up to 10 MPH.

MONDAY: Mostly cloudy. Chance of showers. Highs 50-57. Wind N 5-15 MPH.

MONDAY NIGHT: Mostly cloudy. Chance of showers. Lows 43-50. Wind N-NW 5-15 MPH.

TUESDAY: Mostly cloudy. Chance of showers. Highs 51-58. Wind NW 5-15 MPH.

TUESDAY NIGHT: Variably cloudy. Chance of a shower. Lows 42-49. Wind NW 5-15 MPH.

WEDNESDAY: Variably cloudy. Chance of a shower. Highs 52-59. Wind NW 5-15 MPH.

DAYS 6-10 (APRIL 27 – MAY 1)

Upper level low pressure’s influence remains evident with cool weather and still some occasional cloud cover and a remote shower chance April 27, then generally dry weather, cool April 28, warmer April 29 as upper level low pressure moves away and a flat ridge of high pressure aloft moves in. We’ll then see the next low pressure trough approach later in the period with the threat of a return to unsettled and cooler weather once again – timing uncertain this far in advance.

DAYS 11-15 (MAY 2-6)

The weather pattern looks like it will remain trough-dominated with occasional unsettled weather and temperatures generally below normal.

DAYS 1-5 (APRIL 21-25)

An upper level ridge nudges into our region today, and the arrival of warmer air aloft is being heralded by a fair amount of cloudiness early today, even a small batch of showers which moved through Metro Boston around sunrise and will exit the region via the MA South Shore & outer Cape Cod by mid morning, with sun increasing from west to east by midday. But while we warm up aloft, this will only translate to a warmer day today over interior locations, and not the coast. A bubble of high pressure in the Gulf of Maine will feed us an onshore wind, keeping coastal areas cooler. Still though, not a bad spring day in the broad picture. Things go downhill in the hours to follow as a trough of low pressure approaches from the west and moves into the region this weekend, first bringing lots of clouds back by Saturday, then periods of wet weather Sunday as a cold front extending from surface low pressure to our northwest will move in and slow down. Upper level low pressure will then move slowly southeastward from the Great Lakes into New England early next week, triggering an additional low pressure area on the frontal boundary still hanging around. This will keep us unsettled with cloudy conditions and lingering wet weather as well, along with cool conditions.

TODAY: Lots of clouds through mid morning including brief showers MA South Shore to Outer Cape Cod, then becoming mostly sunny midday on. Highs ranging from 53-60 coast to 60-67 just inland to 67-74 further inland. Wind variable becoming E 5-15 MPH, strongest coast.

TONIGHT: Variably cloudy. Lows 50-57. Wind SE 5-15 MPH.

SATURDAY: Partial sun morning. Cloudy afternoon. Highs 55-62 South Coast / Cape Cod, 63-70 elsewhere. Wind SE 5-15 MPH.

SATURDAY NIGHT: Cloudy. Showers arriving overnight. Lows 50-57. Wind SE 5-15 MPH, higher gusts.

SUNDAY: Cloudy. Showers likely. Slight chance of a thunderstorm. Highs 57-64. Wind SE 10-20 MPH, higher gusts..

SUNDAY NIGHT: Cloudy. Areas of fog and drizzle. Chance of showers. Lows 48-55. Wind variable 5-15 MPH.

MONDAY: Cloudy. Periods of light rain and drizzle. Areas of fog. Temperatures steady 48-55. Wind E-NE 5-15 MPH.

MONDAY NIGHT: Cloudy. Periods of light rain and drizzle. Areas of fog. Lows 42-49. Wind NE 5-15 MPH.

TUESDAY: Mostly cloudy. Lingering periods of rain and drizzle. Highs 48-55. Wind NE 5-15 MPH.

DAYS 6-10 (APRIL 26-30)

Drying trend middle of next week. Uncertainty remains for later in the week. Have to watch another potential low pressure area that may get close to the region from the south to thwart the drying trend, but additional drier weather should be around for the final weekend of the month (April 29-30). Temperatures below normal.

DAYS 11-15 (MAY 1-5)

Overall pattern is expected to be cool and somewhat unsettled for the early days of May with a general trough of low pressure dominating the Northeast.

DAYS 1-5 (APRIL 20-24)

One month after the vernal equinox, as we enter “mid spring”, we find ourselves in a typical springtime pattern with a variety of weather coming. Today, a narrow high pressure ridge slides across the region as an upper trough departs, providing fair weather, less wind, milder air after a chilly start, and eventually less cloudiness than we saw during the last few days. The high center shifts north a bit to near the Gulf of Maine on Friday which allows it to stay mild inland but cools the coast more prominently, setting up a larger temperature contrast from coast to inland then we will see today, but it will continue fair with plenty of sun. A warm front will approach the region Friday night into Saturday with an increase in first high and mid level clouds, though some sun is still possible Saturday for a time before the clouds thicken. Eventually this leads to an episode of warm frontal rainfall Saturday evening or night, and then a ribbon of showers/rain in the region on Sunday as a cold front approaches but slows. This is going to be in response to a slowing of movement of features in the atmosphere and the beginning of the evolution of a closed low pressure area, which will hold cloudy, wet, but cooler weather in the region Monday.

TODAY: Intervals of clouds especially eastern areas early and southern areas later, but also some sunshine. Highs 63-70 except 55-62 immediate coast. Wind W to variable up to 10 MPH with coastal sea breezes developing.

TONIGHT: Partly cloudy evening. Clear overnight. Lows 42-49 coastal areas, 35-42 inland, coldest in valley locations. Wind variable under 10 MPH.

FRIDAY: Mostly sunny. Highs ranging from 53-60 coast to 60-67 just inland to 67-74 further inland. Wind variable becoming E 5-15 MPH, strongest coast.

FRIDAY NIGHT: Variably cloudy. Lows 50-57. Wind SE 5-15 MPH.

SATURDAY: Variably cloudy. Highs 55-62 South Coast / Cape Cod, 62-69 elsewhere. Wind SE 5-15 MPH.

SATURDAY NIGHT: Mostly cloudy. Chance of rain. Lows 50-57. Wind SE 5-15 MPH.

SUNDAY: Cloudy. Showers likely. Highs 57-64. Wind SE 10-20 MPH.

SUNDAY NIGHT: Cloudy. Areas of fog and drizzle. Chance of showers. Lows 48-55. Wind variable 5-15 MPH.

MONDAY: Cloudy. Periods of light rain and drizzle. Areas of fog. Temperatures steady 48-55. Wind E-NE 5-15 MPH.

DAYS 6-10 (APRIL 25-29)

Continued uncertainty but leaning toward an unsettled/cool start to this period with low pressure lingering, and a drier/milder end as high pressure returns.

DAYS 11-15 (APRIL 30 – MAY 4)

Unsettled/cool weather returns for at least a few days during this period – timing to be worked out.

DAYS 1-5 (APRIL 19-23)

The lingering effect of upper level low pressure stays with us today in the form of periodic stratocumulus clouds with cold air aloft. Surface low pressure far to our northeast combined with high pressure to our southwest will send a westerly breeze across the region with a cool feel, especially when the sun isn’t shining. High pressure nudges closer tonight and Thursday then offshore Friday with fair and milder weather conditions. A warm front will move through ahead of approaching low pressure Saturday as a trough moves into the Midwest and Great Lakes. This broad low pressure circulation will send a cold front into the region later in the weekend when wet weather chances will then increase. Although with a fairly narrow area of rain it will be difficult this many days in advance to time the wettest weather, so for now just a general forecast for a showery Sunday will appear below.

TODAY: Intervals of clouds and sun with clouds most dominant early morning from the NH Seacoast through eastern coastal MA to Cape Cod, a sunnier period following that while lots of clouds appear in western portions of the forecast area early-mid morning then spread eastward. Highs 53-60. Wind W 5-15 MPH, a few higher gusts.

TONIGHT: Clouds linger evening. Clearing overnight. Lows 28-35 cold spots, 35-42 most other areas, mildest urban centers. Wind NW up to 10 MPH.

THURSDAY: Sun and patchy clouds. Highs 63-70 except potentially cooler in some immediate coastal areas. Wind W up to 10 MPH with local coastal sea breezes developing.

THURSDAY NIGHT: Partly cloudy. Lows 42-49. Wind variable under 10 MPH.

FRIDAY: Mostly sunny. Highs 60-67, coolest coast. Wind E-SE 5-15 MPH.

FRIDAY NIGHT: Variably cloudy. Lows 50-57. Wind SE 5-15 MPH.

SATURDAY: Variably cloudy. Highs 55-62 South Coast / Cape Cod, 62-69 elsewhere. Wind SE 5-15 MPH.

SATURDAY NIGHT: Mostly cloudy. Chance of a shower. Lows 50-57. Wind SE 5-15 MPH.

SUNDAY: Cloudy. Showers likely. Highs 57-64. Wind SE 10-20 MPH.

DAYS 6-10 (APRIL 24-28)

Uncertainly in the forecast to start next week as to how quickly the weekend system departs, so there may be additional rain chances April 24 before a break with dry/seasonable weather, then more unsettled and cool weather later in the week as the next low pressure trough moves in from the west.

DAYS 11-15 (APRIL 29 – MAY 3)

Overall idea remains a regime of cool and occasionally unsettled weather with a trough dominating our weather. Doesn’t mean a period of nicer weather can’t occur too – will just have to work on the timing details as it all gets closer.

DAYS 1-5 (APRIL 18-22)

Upper level low pressure will cross the Northeast today into Wednesday while surface low pressure departs via eastern Canada today and high pressure builds toward the region via the Great Lakes during Wednesday. Both days will feature diurnal stratocumulus and cumulus clouds, but they will be most extensive today when there is also the chance of a few showers. High pressure slips off to the east later this week and a trough of low pressure will start to approach from the west. A surface low will travel through the Great Lakes initially on Thursday, and a warm front extending from it will try to move through our region, but may struggle to do so, and wait for another push from a second wave of low pressure into the Great Lakes later Friday or Saturday. It remains to be seen if that front will get all the way through here either, and as we enter late week, clouds will start to dominate again, and eventually there can be some light rain or drizzle too, though right now it looks more like cloudiness than much of any wet weather.

TODAY: Clouds most numerous southwestern NH and north central MA as well as Cape Cod early in the day with sun elsewhere, then lots of clouds all areas by midday on with a chance of a few passing showers, some of which can mix with graupel or sleet. Highs 56-63. Wind SW 10-20 MPH.

TONIGHT: Partly cloudy. Lows 36-43. Wind WSW 5-15 MPH.

WEDNESDAY: Mostly sunny to partly cloudy. Highs 53-60. Wind WNW 5-15 MPH, higher gusts.

WEDNESDAY NIGHT: Partly cloudy. Lows 38-45. Wind NW up to 10 MPH.

THURSDAY: Filtered sun – high clouds. Highs 58-65. Wind variable becoming S 5-15 MPH.

THURSDAY NIGHT: Mostly cloudy. Lows 50-57. Wind SW 5-15 MPH.

FRIDAY: Mostly cloudy. Highs 55-62 coast, 63-69 inland. Wind S-SE 5-15 MPH.

FRIDAY NIGHT: Mostly cloudy. Lows 50-57. Wind SE 5-15 MPH.

SATURDAY: Mostly cloudy. Highs 55-62 South Coast / Cape Cod, 62-69 elsewhere. Wind S 5-15 MPH.

DAYS 6-10 (APRIL 23-27)

Frontal boundary will still be in the region on April 23 with showers likely. Lower confidence that additional low pressure may bring additional rain to the region for a portion of early next week before a cooler and drier trend.

DAYS 11-15 (APRIL 28 – MAY 2)

The most reliable medium range guidance continues a theme of near to below normal temperatures and a couple rounds of unsettled weather for the final days of April and first couple days of May. As for details and timing – too soon to say.

DAYS 1-5 (APRIL 17-21)

This is one of our area’s “big days”. Patriots Day is always full of activity that can be impacted by weather, from battle re-enactments in Lexington/Concord to the Boston Marathon to the traditional morning first pitch Red Sox home game at Fenway. And while not directly weather-dependent, Boston will continue extra busy this evening, not only as the final runners from the marathon cross the finish line, but as the Boston Bruins begin their playoff run with a home game against the Florida Panthers. While we will have a low pressure system impacting our region today, it will work out pretty well overall. Lingering low level moisture put in place by an onshore flow associated with weak low pressure moving by the region yesterday means that we will start the day with areas of fog and drizzle under a low overcast, but without much wind. It’ll be cool and on the damp side, but not terrible for anybody outside for the aforementioned activities. Conditions for runners look pretty decent but not ideal as some mist/drizzle is around to start and some rain showers can pass through at any time during the race. These showers will be associated with a cold front, parented by low pressure passing well to our north. The front will move across the region from west southwest to east northeast during the afternoon and early evening, when showers are most likely, but the bulk of them occurring after most of the outdoor activities have ended (other than the later finishing marathon runners). Once the front moves by, drier air will sweep in around the broad circulation of the low on a west southwest wind into Tuesday, but as surface low pressure moves away through eastern Canada, we’ll still have a pool of chilly air aloft to cross the region, associated with upper level low pressure. This means that while Tuesday will likely dawn mostly sunny, we’ll see a fair amount of diurnal clouds popping up, and some of these may grow enough to produce a few showers. A gusty breeze will blow as well, although it won’t be too chilly with modified air arriving via the Midwest. We will cool down a few degrees for Wednesday with a little more northwesterly air flow to the east of a narrow area of high pressure in the Great Lakes. This high will slide across the region Wednesday evening then to the east by Thursday, opening the door for a warm front to move into the area with more cloudiness and eventually a light rain chance. We should be into the warm sector by Friday, but a cold front will approach later in the day with a shower chance resulting.

TODAY: Cloudy. Areas of drizzle/fog until mid morning. Isolated to scattered showers mid morning to midday, scattered to briefly numerous showers midday-afternoon. Highs 55-62. Wind E under 10 MPH early, SE up to 10 MPH thereafter until late-day, then SW 5-15 MPH with higher gusts by evening.

TONIGHT: Clearing. Lows 44-51. Wind SW 5-15 MPH.

TUESDAY: Sun to start, then lots of clouds and a possible passing shower. Highs 56-63. Wind SW 10-20 MPH.

TUESDAY NIGHT: Partly cloudy. Lows 36-43. Wind WSW 5-15 MPH.

WEDNESDAY: Mostly sunny to partly cloudy. Highs 53-60. Wind WNW 5-15 MPH, higher gusts.

WEDNESDAY NIGHT: Partly cloudy. Lows 38-45. Wind NW up to 10 MPH.

THURSDAY: Clouding up. Slight chance of light rain. Highs 58-65. Wind variable becoming S 5-15 MPH.

THURSDAY NIGHT: Mostly cloudy. Chance of a shower. Lows 50-57. Wind SW 5-15 MPH.

FRIDAY: Variably cloudy. Chance of showers late-day or evening. Highs 63-70 except cooler in coastal areas, especially South Coast. Wind SW 10-20 MPH.

DAYS 6-10 (APRIL 22-26)

A frontal system and additional low pressure in the region for the April 22-23 weekend means unsettled weather – may not rain at all times but will have to watch for shower chances and variable temperatures. Will work out details in the days ahead. Trending drier and cooler thereafter.

DAYS 11-15 (APRIL 27 – MAY 1)

Overall idea is near to below normal temperatures with some unsettled weather at times as a low pressure trough will be in control of the weather.

DAYS 1-5 (APRIL 16-20)

In the dank tank for today – but rainfall is going to be limited to an initial batch of dissipating showers in Metro West (which may be gone by the time you read this) and a more solid area of showers from the South Coast of RI & MA through Cape Cod (with most of the activity offshore). This is due to a weakening area of low pressure drifting across the region that will serve more to keep clouds, areas of fog, and patchy drizzle in place than much else. Another low pressure area, this one larger in scale, is going to be passing to our northwest during the next 24 to 36 hours, pushing a cold front across the region with another threat of showers during Monday, but it still looks like the bulk of that activity holds off until after the major Patriots Day events in the region, as mentioned yesterday. Once that low gets into eastern Canada, a breezy, cool day is expected Tuesday and there may be a pop up shower with an upper level low crossing the region, providing plenty of cold air aloft, which is an unstable set-up. This may linger a little into Wednesday at least enough to produce some diurnal clouds and maybe a sprinkle or brief shower, but we should see mainly dry weather at midweek as a narrow area of high pressure moves into the region.

TODAY: Cloudy. A few showers west / northwest of Boston early, and more widespread showers South Coast / Cape Cod until mid morning, otherwise isolated sprinkles. Areas of drizzle and fog. Highs 52-59, coolest coast. Wind NE 5-15 MPH.

TONIGHT: Cloudy. Lows 45-52.Wind E 5-15 MPH.

MONDAY: Mostly cloudy. Scattered to numerous showers mainly afternoon. Highs 54-61, coolest coast. Wind E-SE 5-15 MPH.

MONDAY NIGHT: Mostly cloudy. Showers likely in the evening. Lows 48-55. Wind S-SW 5-15 MPH.

TUESDAY: Sun/cloud mix. A passing shower possible. Highs 58-65. Wind SW 10-20 MPH.

TUESDAY NIGHT: Partly cloudy. Lows 36-43. Wind WSW 5-15 MPH.

WEDNESDAY: Partly sunny. Slight chance of a passing shower. Highs 55-62. Wind W 5-15 MPH.

WEDNESDAY NIGHT: Partly cloudy. Lows 38-45. Wind NW up to 10 MPH.

THURSDAY: Sun and high clouds. Highs 57-64, coolest coast. Wind variable 5-15 MPH with coastal sea breezes.

DAYS 6-10 (APRIL 21-25)

One low pressure trough brings the threat of a little unsettled weather around April 21-22 and another approaches later in the period with rain chances. Temperatures variable, averaging near normal.

DAYS 11-15 (APRIL 26-30)

Trend remains cooler and more unsettled for the late days of April with a trough of low pressure dominating the Northeast.

DAYS 1-5 (APRIL 15-19)

A back-to-reality weekend as we’ll see limited sun (if any at all in some areas), an often onshore air flow, and a couple of bouts of wet weather – although far from a “wash-out”, as the over-used meteorological phrase goes. Our unsettled weather will come in the form of a few showers later today or tonight and a bit of light rain and/or drizzle at times Sunday from a weakening low pressure area drifting up the Atlantic Coast from the south, and then a round of showers some time Monday afternoon or evening, holding off long enough so that the major events (Lexington / Concord, Boston Marathon, Red Sox Game) in the area should take place without much in the way of wet weather to contend with. The latter will be the result of a frontal boundary sweeping eastward across the region, parented by low pressure passing to our north. After that low lifts into eastern Canada, on its back side we’ll see gusty winds, cool air, and maybe a pop up shower Tuesday as upper level low pressure crosses the region, then a sliver of high pressure to bring fair weather and less wind by Wednesday.

TODAY: Partly sunny. Highs 60-67 most areas – a few sub-60 readings some coastal areas and a few pushes toward 70 in some inland locations. Wind NE up to 10 MPH, few higher gusts in some coastal areas.

TONIGHT: Mostly cloudy. Scattered showers. Areas of fog / drizzle. Lows 46-53. Wind E-NE 5-15 MPH.

SUNDAY: Mostly cloudy. Chance of showers mainly early morning. Patchy drizzle and light rain favoring the coast and especially Cape Cod thereafter. Highs 52-59, coolest coast. Wind NE 5-15 MPH.

SUNDAY NIGHT: Mostly cloudy. Lows 45-52.Wind SE 5-15 MPH.

MONDAY: Mostly cloudy. Showers likely later in the day. Highs 55-62, coolest coast. Wind SE-S 5-15 MPH.

MONDAY NIGHT: Mostly cloudy. Showers likely in the evening. Lows 48-55. Wind S-SW 5-15 MPH.

TUESDAY: Sun/cloud mix. A passing shower possible. Highs 58-65. Wind W 10-20 MPH.

TUESDAY NIGHT: Partly cloudy. Lows 36-43. Wind NW 5-15 MPH.

WEDNESDAY: Mostly sunny. Highs 57-64. Wind NW up to 10 MPH.

DAYS 6-10 (APRIL 20-24)

One low pressure trough brings the threat of a little unsettled weather around April 21-22 and another approaches late-period with rain chances. Temperatures variable, averaging near normal.

DAYS 11-15 (APRIL 25-29)

Trend remains cooler and more unsettled for the later days of April with a trough of low pressure dominating the Northeast.

DAYS 1-5 (APRIL 14-18)

Our preview of summer gets kicked out the door by a back-door cold front and ocean wind that arrives from northeast to southwest during today, but it will be late enough in arrival away from the coast so that we do see one more day of summer-like warmth there. As is often the case, the back-door front will not be accompanied by any precipitation, in fact, the front won’t even carry any clouds with it, as we just have a canopy of high level clouds drifting across our sky, filtering the sun and giving the sky a hazier look to accent the lingering summertime feel ahead of the front. We do see more cloudiness over the weekend as finally some low level moisture increases the cloud coverage on Saturday along with the approach of a weak low pressure system from the south, bringing a rain shower chance later Saturday to early Sunday – though this doesn’t look too widespread. By Sunday, the cloud deck will be more solid and we’ll end up cooler than Saturday, still coolest in coastal areas and a little less so over the interior. A larger scale low pressure trough will be approaching from the west as the weekend goes on. While surface low pressure is destined to pass well to our northwest on Monday, a cold front will sweep through the region from west to east, but the timing is late enough so that Patriots Day events in Lexington/Concord, the Boston Marathon, and Red Sox games should occur with generally rain-free conditions, just a mainly cloudy sky. A band of showers will then come through from later in the day through the evening, exiting to the east overnight, and setting up a return to dry weather Tuesday with a gusty westerly wind setting in.

TODAY: Mostly sunny. Highs 70-77 coast and 78-85 inland during the morning, with a sharp cooling trend coast by midday and slower cooling trend inland during the afternoon. Wind W up to 10 MPH shifting to E 5-15 MPH from northeast to southwest with higher gusts in coastal locations.

TONIGHT: Partly cloudy. Lows 50-57. Wind shifting to NE 5-15 MPH.

SATURDAY: Partly sunny. Highs 60-67, coolest coast. Wind NE 5-15 MPH.

SATURDAY NIGHT: Mostly cloudy. Scattered showers overnight. Lows 46-53. Wind E-NE 5-15 MPH.

SUNDAY: Mostly cloudy. Chance of showers mainly early morning. Patchy drizzle favoring the coast. Highs 52-59, coolest coast. Wind NE 5-15 MPH.

SUNDAY NIGHT: Mostly cloudy. Lows 45-52.Wind SE 5-15 MPH.

MONDAY: Mostly cloudy. Chance of showers, mainly late in the day. Highs 55-62, coolest coast. Wind SE-S 5-15 MPH.

MONDAY NIGHT: Cloudy. Showers likely. Lows 48-55. Wind S-SW 5-15 MPH.

TUESDAY: Sun/cloud mix. Highs 58-65. Wind W 10-20 MPH.

DAYS 6-10 (APRIL 19-23)

Other than a mid-period trough passage with a shower chance, high pressure dominates with mainly dry weather and mostly seasonable, though somewhat variable temperatures.

DAYS 11-15 (APRIL 24-28)

Trend is cooler and more unsettled for the later days of April with a trough of low pressure dominating the Northeast.

DAYS 1-5 (APRIL 13-17)

A summer preview today as high pressure both surface (to our south) and aloft dominates the weather and allows for a big warm-up with a dry westerly wind. Only areas along the irregular coastline that have a westerly wind off some ocean water first will be cooler (parts of the North Shore, South Coast, and especially outer Cape Cod as well as Martha’s Vineyard and Nantucket). Many other locations should reach or exceed 80 for the first time this year. After a warm evening and very mild overnight tonight, it will look like a repeat of today when tomorrow dawns, but a weaker westerly air flow is going to allow for a healthy sea breeze to get going in most coastal areas, keeping it considerably cooler there compared to inland. And to add to that, a back-door cold front is likely to swing through the region anyway from northeast to southwest during the afternoon and evening hours, slowing down as it heads southwestward during the night. This sets up a much cooler day for many areas Saturday, though with a larger temperature spread from coastal areas to furthest inland reaches of the WHW forecast area, but also along with more cloudiness for the area. Low pressure approaching from the south southwest on Sunday will send a band of showers into the region in the pre-dawn hours, but this area of showers is expected to be on the wane, producing the most widespread coverage along the South Coast before fading and fizzling, leaving the region with a broad but weak onshore (easterly) air flow Sunday, mainly cloudy weather, and perhaps a bit of drizzle. Heading into Monday (Patriots Day), low pressure from the west will send a more solid band of rain showers into the region, with timing critical regarding any impact of early festivities regarding the holiday, and of course the Boston Marathon and Red Sox game. Current leaning is later-day / evening for the best rain chance with the bulk of outdoor activities being held before it arrives. Will continue to monitor and update this part of the forecast as necessary…

TODAY: Sunny. Highs 80-87 except 70s portions of North Shore and South Coast, 60s Cape Cod / Islands. Wind W 5-15 MPH.

TONIGHT: Clear. Lows 53-60. Wind W up to 10 MPH.

FRIDAY: Mostly sunny. Highs 77-84 except significantly cooler in coastal locations. Wind W up to 10 MPH with coastal sea breezes developing.

FRIDAY NIGHT: Partly cloudy. Lows 50-57. Wind shifting to NE 5-15 MPH.

SATURDAY: Partly sunny. Highs 60-67, coolest coast. Wind NE 5-15 MPH.

SATURDAY NIGHT: Mostly cloudy. Showers likely South Coast pre-dawn. Lows 46-53. Wind E up to 10 MPH.

SUNDAY: Mostly cloudy. Chance of showers mainly early morning. Patchy drizzle favoring the coast. Highs 52-59, coolest coast. Wind E up to 10 MPH.

SUNDAY NIGHT: Mostly cloudy. Chance of a shower. Lows 45-52.Wind SE 5-15 MPH.

MONDAY: Mostly cloudy. Chance of showers, mainly late in the day. Highs 55-62, coolest coast. Wind SE-S 5-15 MPH.

DAYS 6-10 (APRIL 18-22)

Upper level low pressure hanging around the region may cause a few showers early in the period with somewhat cooler weather expected. Generally fair/seasonable with high pressure in control at mid period. Additional unsettled weather possible toward the end of the period.

DAYS 11-15 (APRIL 23-27)

Eyeing the potential for a more solid rain producing system early to mid period with near to below normal temperatures, followed by a drying trend.