Lexington, Massachusetts, USA
Point Forecast Updated Thu Mar 28, 2024 8:24am EDT
Another chilly day is on tap for Tuesday, with raw northeast winds along with some spotty light showers, drizzle and fog, especially across eastern Massachusetts. Considerably milder Wednesday, but continued risk for showers. A frontal wave will bring more widespread rain Thursday into early Friday, which may lead to renewed flooding concerns. Drying out later Friday into Saturday, but there remains uncertainty in the exact timing. Dry and seasonable next weekend, but blustery on Saturday.
Rain
Hi 50 °F
Rain and patchy fog. Cloudy, with a high near 50. North wind 2 to 6 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Light Rain
Lo 36 °F
Rain and patchy fog. Cloudy, with a low around 36. North wind 6 to 12 mph, with gusts as high as 22 mph. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.
Rain And Snow Likely then Chance Rain And Snow
Hi 48 °F
Rain likely before 7am, then rain and snow likely between 7am and 8am, then a chance of rain and snow between 8am and 2pm. Mostly cloudy, with a high near 48. Northwest wind 13 to 17 mph, with gusts as high as 32 mph. Chance of precipitation is 60%. New rainfall amounts between a half and three quarters of an inch possible.
Partly Cloudy
Lo 35 °F
Partly cloudy, with a low around 35. Northwest wind 16 to 23 mph, with gusts as high as 35 mph.
Sunny
Hi 51 °F
Sunny, with a high near 51. West wind around 20 mph, with gusts as high as 31 mph.
Partly Cloudy
Lo 35 °F
Partly cloudy, with a low around 35. West wind 10 to 17 mph.
Mostly Sunny
Hi 53 °F
Mostly sunny, with a high near 53. Northwest wind 10 to 16 mph.
Partly Cloudy
Lo 33 °F
Partly cloudy, with a low around 33. Northwest wind 9 to 16 mph.
Mostly Sunny
Hi 54 °F
Mostly sunny, with a high near 54. Northwest wind around 12 mph.
Chance Light Rain
Lo 37 °F
A chance of rain after 11pm. Mostly cloudy, with a low around 37. East wind 7 to 12 mph. Chance of precipitation is 30%.
Light Rain Likely
Hi 48 °F
Rain likely. Mostly cloudy, with a high near 48. East wind 8 to 14 mph. Chance of precipitation is 60%.
Light Rain Likely
Lo 37 °F
Rain likely. Mostly cloudy, with a low around 37. Northeast wind around 14 mph. Chance of precipitation is 60%.
Chance Light Rain
Hi 46 °F
A chance of rain. Mostly cloudy, with a high near 46. Northeast wind 13 to 17 mph. Chance of precipitation is 50%.
Chance Light Rain
Lo 36 °F
A chance of rain. Mostly cloudy, with a low around 36. North wind around 20 mph. Chance of precipitation is 50%.
Updated Thu Mar 28, 2024 8:24am EDT
000 FXUS61 KBOX 260611 AFDBOX Area Forecast Discussion National Weather Service Boston/Norton MA 211 AM EDT Tue Mar 26 2024 .SYNOPSIS... Another chilly day is on tap for Tuesday, with raw northeast winds along with some spotty light showers, drizzle and fog, especially across eastern Massachusetts. Considerably milder Wednesday, but continued risk for showers. A frontal wave will bring more widespread rain Thursday into early Friday, which may lead to renewed flooding concerns. Drying out later Friday into Saturday, but there remains uncertainty in the exact timing. Dry and seasonable next weekend, but blustery on Saturday. && .NEAR TERM /THROUGH TODAY/... 2 AM update... Key Points... * Cool/Raw Tue with spotty light showers/drizzle, esp eastern MA * Highs Tue only in the upper 30s/lower 40s Details... Tuesday... Occluded low well south of New England begins to rotate deeper moisture into SNE today, especially across eastern MA via WAA aloft wrapping cyclonically around the offshore. This combined with moist ENE low level flow into SNE, will result in bands of light showers coming onshore, along with areas of drizzle and fog. Not a washout, but definitely nuisance precip across eastern/central MA into RI, with precip not as widespread westward into CT and western MA. Raw/damp ENE winds 15-25 mph, except gusts up to 35 mph Cape Cod and Islands continue today, slowly easing late in the day as pressure gradient relaxes. However, this will result in another chilly day with highs only in the upper 30s to lower 40s, mid 30s high terrain. These temps are about 10 degs cooler than normal. It will feel coolest along/near the coast given the chilly onshore winds. && .SHORT TERM /TONIGHT THROUGH 6 PM WEDNESDAY/... 2 AM update... Key Points... * Remaining damp Tue night * Milder Wednesday and not as wet Tuesday night... Synoptic scale lift arrives later tonight in response to s/wv trough approaching from the west. However, deep layer moisture is lacking and this should preclude widespread showers, hence more scattered in areal coverage, along with areas of drizzle and fog. Thus, damp weather at times. Not as chilly as airmass slowly modifies. Lows in the 30s. As previous forecaster noted, the higher terrain could see lows near freezing. Thus, low risk of spotty light freezing rain/drizzle at the highest elevations of the Worcester Hills and east slopes of the Berks. Although, with cold air damming setup weakening overnight, probability is very low for any freezing rain/drizzle. Otherwise, ptype will be all rain. Light NE winds become light and variable late. Wednesday... Some synoptic scale lift moving across SNE from S/WV energy in the SW flow aloft, but deep layer moisture is lacking. Thus, other than morning drizzle and fog, late morning into the afternoon should feature mainly dry weather, especially across RI and eastern MA. Farther to the west, deeper moisture may result in scattered showers across western MA/CT. Clouds likely dominate but milder, in response to low level flow becoming SSE, supporting highs in the mid to upper 50s. It will feel milder as dew pts climb into the 40s, compared to the 20s early Tue. Light and variable winds early becoming SSE in the afternoon. && .LONG TERM /WEDNESDAY NIGHT THROUGH MONDAY/... Key Points... * More widespread, heavier rainfall arrives Wednesday night through Thursday, potentially renewing flooding concerns. * Drying out Friday or Saturday and remaining dry through early next week (some uncertainty as to when the rain ends). * High temperatures in the 50s. The weather pattern for mid to late week can be described as unsettled over much of the Northeast including Southern New England owing to a broad trough over the entire central/eastern U.S. The trough axis moves from the Great Plains on Wednesday to the southeast U.S. by Thursday and crosses New England around Friday. This results in rain with the potential for some interior snow, coming to an end around Friday as zonal flow returns for the weekend. Beneath a much drier airmass we should remain dry through at least Monday with temperatures near to slightly above normal (in the low to mid 50s). The focus period for the long term forecast will be Wednesday night through Thursday night (at least). This 24-36 hour period has the potential to deliver another round of 2-3 inches of rain to the region which (I'm sure we don't need to remind you) only recently received this much rain and continues to see some rivers in flood stage. The most important thing to determining where/if we deal with exacerbated flooding will be the ultimate track of the storm and the axis of heaviest rainfall. It is too soon to have a high degree of confidence on where this axis sets up, but the most recent ECMWF global guidance has come west, in line with the GFS/Canadian guidance showing those large rainfall amounts over interior southern New England rather than further east/offshore. Of course, we don't want to focus on deterministic model runs, but that agreement isn't what you would want to see if you're hoping for a miss offshore. At this time frame we focus on ensembles, two of which (the GEFS and EPS) are indicating a 20-40% and 10-30% chance of AOA 2 inches of rain respectively. Not huge numbers, but 3 days out certainly indicative of potential for concern given how saturated the ground is already. The atmospheric moisture and dynamics are there, with a 1.25" PWAT plume directly from the Gulf of Mexico and large scale ascent from favorable placement beneath a 150 kt upper jet, but just how/if the northern and southern streams interact is unknown at this time. Additionally, probabilistic hydrographs from the NAEFS and GEFS indicate renewed flooding for RI rivers. This system will also bring a period of gusty winds as it passes late week. && .AVIATION /06Z TUESDAY THROUGH SATURDAY/... Forecast Confidence Levels: Low - less than 30 percent. Moderate - 30 to 60 percent. High- greater than 60 percent. 06z TAF Update... Thru 12z...High Confidence. MVFR cigs overspread all terminals thru 12z with light rain moving onshore into eastern MA, especially Cape Cod and the Islands. NE winds remain gusty, especially Cape Cod and the Islands, up to 40 kt at times. Elsewhere, NE winds 15-25 kt. After 12z...high confidence on trends, lower on exact details and timing. MVFR/IFR conditions overspread the region from SE to NW today, with much of the region IFR by late today, with areas of LIFR possible late across Cape and Islands. Bands of light rain overspread the much of the region today from southeast to northwest. In between the showers there will be areas of drizzle and fog, especially this afternoon across the hilly terrain of Worcester Hills and east slopes of the Berks, with IFR/MVFR vsbys. NE winds remain gusty 15-25 kt, except up to 35 kt along the coast, slowly easing late in the day. Tonight...high confidence. A comb of IFR/LIFR in low clouds, spotty light rain, drizzle and areas of fog. NE winds ease and become SE late. Wednesday...moderate confidence. Not as damp and drier in the afternoon across RI and eastern MA. IFR/LIFR in the morning lifts to MVFR/VFR in the afternoon, with light and variable winds in the AM becoming SSE in the afternoon. KBOS TAF...High confidence in trends, some uncertainty in exact timing and details. KBDL TAF...High confidence in trends, some uncertainty in exact timing and details. Outlook /Wednesday night through Saturday/... Wednesday Night: Mainly VFR, with areas IFR possible. RA likely, patchy BR. Thursday: Mainly IFR, with local MVFR possible. RA likely, patchy BR. Thursday Night: Mainly IFR, with local MVFR possible. Windy with local gusts up to 30 kt. RA likely, patchy BR. Friday: Mainly VFR, with local IFR possible. Windy with gusts up to 30 kt. Chance RA. Friday Night: VFR. Windy with gusts up to 35 kt. Slight chance RA. Saturday: VFR. Windy with gusts up to 30 kt. && .MARINE... Forecaster Confidence Levels: Low - less than 30 percent. Medium - 30 to 60 percent. High - greater than 60 percent. 2 AM update... * High Seas & NE Gales Tue Morning... Tuesday... Offshore low well south of New England will continue to generate ENE gales across the MA/RI waters into Tue morning, then slowly slackening Tue afternoon. Given the large easterly fetch, very rough/dangerous seas persist, 15-20 ft seas SE of Nantucket and Cape Cod. Vsby reduced at times in light rain, drizzle and fog. Tuesday night... High pressure over the Maritimes and low pressure south of New England both weaken. This will result in winds slackening and shifting from NE to SE. Rough seas slowly subside. Vsby limited in areas of light rain/drizzle and fog. Wednesday... Weak high pressure over the waters yielding light and variable winds. Drizzle and fog during the morning, slowly gives way to drier weather in the afternoon along with improving vsby. Outlook /Wednesday Night through Saturday/... Wednesday Night: Winds less than 25 kt. Local rough seas. Rain likely, patchy fog. Areas of visibility 1 to 3 nm. Thursday: Winds less than 25 kt. Seas up to 5 ft. Rain, patchy fog. Visibility 1 to 3 nm. Thursday Night: Low risk for Small Craft Advisory winds with gusts up to 30 kt. Areas of rough seas. Rain, patchy fog. Visibility 1 to 3 nm. Friday: Low risk for gale force winds with gusts up to 30 kt. Rough seas up to 9 ft. Chance of rain, patchy fog. Local visibility 1 to 3 nm. Friday Night: Low risk for gale force winds with gusts up to 35 kt. Rough seas up to 9 ft. Slight chance of rain. Saturday: Moderate risk for Small Craft Advisory winds with gusts up to 30 kt. Areas of rough seas. && .BOX WATCHES/WARNINGS/ADVISORIES... CT...None. MA...Wind Advisory until 4 AM EDT early this morning for MAZ024. RI...None. MARINE...Small Craft Advisory until 8 PM EDT this evening for ANZ230- 236. Gale Warning until 2 PM EDT this afternoon for ANZ231>235- 254>256. Small Craft Advisory until midnight EDT tonight for ANZ237. Small Craft Advisory until 8 AM EDT Wednesday for ANZ250-251. && $$ SYNOPSIS...Nocera NEAR TERM...Nocera SHORT TERM...Nocera LONG TERM...BW AVIATION...Nocera/BW MARINE...Nocera/BW
Point forecast:
https://api.weather.gov/gridpoints/BOX/65,93/forecast
Zone forecast:
https://api.weather.gov/zones/forecast/MAZ014/forecast
Hourly forecast:
https://api.weather.gov/gridpoints/BOX/65,93/forecast/hourly
Hourly detail:
https://api.weather.gov/gridpoints/BOX/65,93
Point detail:
https://api.weather.gov/points/42.4399,-71.2405
Alerts:
https://api.weather.gov/alerts?active=1&point=42.4399,-71.2405