Lexington, Massachusetts, USA
Point Forecast Updated Mon Feb 10, 2025 3:33pm EST
Dry and cold conditions through Tuesday with below normal temperatures. Low pressure will track well south of New England Tuesday night and may bring some light snow to the immediate south coast and Islands followed by drying conditions Wednesday. A stronger frontal system then affects Southern New England Wednesday night through Thursday, with a variety of precipitation types anticipated to impact the Thursday morning commute. Drier weather returns for Friday into early on Saturday before another strong frontal system brings another period of mixed precipitation over the weekend.
Mostly Clear
Lo 9 °F
Mostly clear, with a low around 9. West wind around 5 mph.
Partly Sunny
Hi 33 °F
Partly sunny, with a high near 33. Southwest wind 5 to 9 mph.
Mostly Cloudy
Lo 17 °F
Mostly cloudy, with a low around 17. West wind around 6 mph.
Mostly Cloudy
Hi 31 °F
Mostly cloudy, with a high near 31. Northeast wind 5 to 8 mph.
Light Snow Likely
Lo 25 °F
A chance of snow between 7pm and midnight, then snow likely and patchy fog between midnight and 3am, then snow and patchy freezing fog between 3am and 5am, then snow and patchy fog. Cloudy, with a low around 25. East wind 6 to 9 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 3 inches possible.
Light Snow then Sleet
Hi 39 °F
Snow and sleet and patchy fog before 7am, then sleet and freezing rain and patchy freezing fog between 7am and 9am, then sleet and rain and patchy freezing fog between 9am and 10am, then sleet and rain and patchy fog. Mostly cloudy, with a high near 39. Northeast wind 6 to 10 mph. Chance of precipitation is 90%. New snow accumulation of less than half an inch possible.
Slight Chance Light Rain then Partly Cloudy
Lo 20 °F
A slight chance of rain before 8pm. Partly cloudy, with a low around 20. West wind 8 to 12 mph.
Sunny
Hi 29 °F
Sunny, with a high near 29. Northwest wind 9 to 14 mph, with gusts as high as 28 mph.
Partly Cloudy
Lo 13 °F
Partly cloudy, with a low around 13. West wind 3 to 8 mph.
Chance Light Snow
Hi 35 °F
A chance of snow after 11am. Mostly cloudy, with a high near 35. South wind around 6 mph. Chance of precipitation is 50%.
Snow
Lo 28 °F
Snow before 11pm, then rain and snow between 11pm and 3am, then rain and snow. Cloudy, with a low around 28. Southeast wind around 7 mph. Chance of precipitation is 90%.
Rain And Snow
Hi 39 °F
Rain and snow before 4pm, then rain and snow. Cloudy, with a high near 39. North wind 8 to 12 mph. Chance of precipitation is 90%.
Rain And Snow Likely
Lo 15 °F
Rain and snow likely. Mostly cloudy, with a low around 15. Northwest wind around 12 mph. Chance of precipitation is 70%.
Slight Chance Light Snow then Mostly Sunny
Hi 25 °F
A slight chance of snow before 9am. Mostly sunny, with a high near 25. West wind 12 to 15 mph, with gusts as high as 29 mph.
Updated Mon Feb 10, 2025 3:33pm EST
000 FXUS61 KBOX 102040 AFDBOX Area Forecast Discussion National Weather Service Boston/Norton MA 340 PM EST Mon Feb 10 2025 .SYNOPSIS... Dry and cold conditions through Tuesday with below normal temperatures. Low pressure will track well south of New England Tuesday night and may bring some light snow to the immediate south coast and Islands followed by drying conditions Wednesday. A stronger frontal system then affects Southern New England Wednesday night through Thursday, with a variety of precipitation types anticipated to impact the Thursday morning commute. Drier weather returns for Friday into early on Saturday before another strong frontal system brings another period of mixed precipitation over the weekend. && .NEAR TERM /UNTIL 6 AM TUESDAY MORNING/... Diurnal strato-cu will gradually erode this evening leading to mostly clear skies as high pres builds into the region from the west. Diminishing wind and clearing skies will result in a period of good radiational cooling conditions but high clouds will be moving in overnight which could have some impact on low temps. We blended the colder MOS guidance with NBM to derive temps tonight, yielding lows in the teens except single numbers across interior northern and western MA. && .SHORT TERM /6 AM TUESDAY MORNING THROUGH TUESDAY NIGHT/... Tuesday... The high pres slides offshore with mid-high level moisture streaming into SNE from the SW. High clouds will gradually lower and thicken during the day with any sunshine fading behind increasing clouds. Temps will remain below normal with highs mostly 30-35, but upper 20s across interior MA high terrain. Increasing SW flow ahead of a northern stream shortwave will result in 10-20 mph winds developing per forecast soundings. Tuesday night... Flat wave tracks ENE off the NC coast and passes well south of the benchmark. Bulk of snowfall from this system will remain to the south. However northern extent of deep moisture may move up along the south coast. The forecast challenge is how far north will snow shield extend. 3km NAM is most aggressive with around 0.25" QPF over the Islands but very sharp gradient on the northern edge. Rest of hi- res guidance sources are further south with heavier QPF and keep most of the snow to the south. EPS and GEFS ensembles also show just moderate probs of 0.10" QPF grazing the Islands with higher PoPs to the south. So we are leaning toward light accums, around an inch or 2 for the Islands and just a coating to less than an inch for the south coast and Cape Cod. However, given the sharp gradient on the northern edge, any shift to the south would result in little to no snow for the south coast and less than an inch for the Islands. A further northward trend would result in a bit more snow. Either way, this is not expected to have much impact as snow will be developing after 9-10 pm with only minor accums and mostly done before daybreak. && .LONG TERM /WEDNESDAY THROUGH MONDAY/... Key Messages: * Frontal system Wed night into Thurs brings a wintry mix of snow, icing and eventually rain, with adverse impact to the Thurs AM commute. Although accumulations are still uncertain, winter weather headlines seem likely to be needed. * Quiet Friday, but colder temps settle in over the area. * A low-pressure system approaches Saturday, likely bringing another round of wintry precip to southern New England. Details: Wednesday and Thursday: High pressure early Wed then slowly retreats NE as a rather potent 500 mb shortwave embedded in fast SW flow aloft moves through the Gt Lakes region Wed night and into northern New England into Thurs. The progged strength of this wave and the associated mass response downstream (e.g. height rises) ahead of it supports stronger influx of warmer air intruding in aloft on lower level southerly flow, suggesting a variety of p-type changes and wintry mix scenario in play specific to this storm. This lends itself to uncertainties regarding snow/ice amts and precip type timing/changeovers. With adverse impacts from wintry weather looking likely to impact travelers late Wed night and into Thurs, especially the Thurs AM commute, it has the look of an winter wx advisory type event for most of interior Southern New England. Antecedent airmass when precip comes in, around mid to late Wed night, is plenty cold enough to support a period of steadier- accumulating light to moderate wet/dense snow at onset. It is possible we could get some "thump" of heavier embedded snowbands in response to warm advection/frontogenesis effects, but where and when this takes place is still unclear. Eventually warmer air wins out and facilities a transition from snow to ice pellets/freezing rain from south to north overnight into Thurs. As the column graudally warms aloft, sustained/prolonged onshore flow near the E MA coastline may allow for an earlier p-type transition than further inland. Although temps in most areas warm above freezing enough to flip any wintry mix over to rain, there are several global ensemble members which show at least some bagginess to isobars/possible secondary low pressure development near or just east of Southern New England. If this were to develop, this could help to maintain or draw down colder near/sub-freezing temps from NH/ME and keep wintry p-types in for a longer period of time, especially in northern and northeast MA. We then dry out by Thurs afternoon with not much if any impact to the Thurs PM commute. Thursday Night through Monday: Decent ridging ahead of a quick moving high will allow for rather chilly temps Thursday night and Friday, with overnight lows in the mid-teens, and a brief respite from the rain and snow. Another shortwave moves east off the Rockies Saturday, bringing a surface low through New England on Sunday. Model guidance on the track of the system is still very uncertain. The GFS is favoring a faster, more southerly track, while the ECMWF and GEM are indicating the system may stall out over eastern Ohio/western Pennsylvania sometime Sunday morning. Regardless, the embeded upper-level WAA combined with colder surface temps will likely pose several p-typing issues for the weekend. && .AVIATION /21Z MONDAY THROUGH SATURDAY/... Forecast Confidence Levels: Low - less than 30 percent. Moderate - 30 to 60 percent. High - greater than 60 percent. Through Tuesday...High confidence. VFR through the period. BKN cigs around 5k ft this afternoon will erode this evening. Increasing high clouds Tue. WNW gusts to 20 kt this afternoon becoming light tonight, then SW 10-20 kt Tue. Tuesday night...Moderate confidence. Uncertainty with northern extent of snow area as it approaches the south coast. Best chance for a period of snow with IFR vsbys and minor accum will be over the Islands with lower probability along the south coast. VFR north of HFD-PVD-PYM. KBOS TAF...High Confidence in TAF. KBDL TAF...High Confidence in TAF. Outlook /Wednesday through Saturday/... Wednesday: Mainly VFR, with local MVFR possible. Breezy. Slight chance SN. Wednesday Night: Mainly IFR, with areas MVFR possible. Breezy. Chance SN, PL, FZRA, patchy BR. Thursday: Mainly IFR, with local MVFR possible. Breezy. FZRA, PL, chance RA, patchy FG. Thursday Night through Friday: VFR. Windy with gusts up to 30 kt. Friday Night: VFR. Breezy. Saturday: Mainly VFR, with local IFR possible. Chance SN. && .MARINE... Forecaster Confidence Levels: Low - less than 30 percent. Medium - 30 to 60 percent. High - greater than 60 percent. Gusty NW winds to 20-25 kt eastern MA waters will diminish tonight, then shift to SW 10-20 kt during Tue. Winds will then become N-NE 10- 20 kt late Tue night as front slides south of the region. SCA for eastern MA waters into this evening for winds and seas. Outlook /Wednesday through Saturday/... Wednesday: Winds less than 25 kt. Seas locally approaching 5 ft. Slight chance of snow. Wednesday Night: Moderate risk for Small Craft Advisory winds with gusts up to 25 kt. Seas up to 5 ft. Rain, sleet, chance of snow, freezing rain, patchy fog. Areas of visibility 1 to 3 nm. Thursday: Low risk for Small Craft Advisory winds with gusts up to 25 kt. Rough seas up to 10 ft. Rain, freezing rain, patchy fog. Thursday Night through Friday: Strong winds with gusts up to 30 kt. Rough seas up to 9 ft. Friday Night: Winds less than 25 kt. Local rough seas. Saturday: Winds less than 25 kt. Chance of snow, chance of rain. && .BOX WATCHES/WARNINGS/ADVISORIES... CT...None. MA...None. RI...None. MARINE...Small Craft Advisory until 4 AM EST Tuesday for ANZ250-254. Small Craft Advisory until 9 PM EST this evening for ANZ251. && $$ SYNOPSIS...KJC/Loconto/McMinn NEAR TERM...KJC SHORT TERM...KJC LONG TERM...Loconto/McMinn AVIATION...KJC/Loconto/McMinn MARINE...KJC/Loconto/McMinn
Point forecast:
https://api.weather.gov/gridpoints/BOX/65,92/forecast
Zone forecast:
https://api.weather.gov/zones/forecast/MAZ014/forecast
Hourly forecast:
https://api.weather.gov/gridpoints/BOX/65,92/forecast/hourly
Hourly detail:
https://api.weather.gov/gridpoints/BOX/65,92
Point detail:
https://api.weather.gov/points/42.435,-71.2461
Alerts:
https://api.weather.gov/alerts?active=1&point=42.435,-71.2461