Lexington, Massachusetts, USA
27.9°F
-2.3°C
Cold
Partly cloudy
Tonight: Lo 18 °F
Tuesday: Hi 37 °F
Dew Point: 19.9°F
Humidity: 72%
Barometer:
mb
Rain Rate: 0.00 in/hr
Rain Today: 0.00 in
Rain Sunday: 0.00 in
Visibility: 10 miles
Wind:
Now: Calm
Avg: Calm
Gusts: 0 mph
For Lexington, range of possible snowfall from 0.0 to 1.4". 0.6" expected.
Issued by:
National Weather Service Boston / Norton, MA
Point Forecast Updated Mon Dec 2, 2024 6:16pm EST
Mainly sunny and dry weather is expected through Tuesday, although a cold airmass will continue to yield below normal temperatures and periods of ocean effect cloudiness for the Cape and Islands. Next chance for precipitation comes Wednesday night into Thursday, as a clipper system brings rain near the coast and accumulating snowfall in the interior. An colder airmass moves in Friday and into the weekend, likely with the coldest air of the season thus far.
Clear
Lo 18 °F
Clear, with a low around 18. Northwest wind around 3 mph.
Sunny
Hi 37 °F
Sunny. High near 37, with temperatures falling to around 31 in the afternoon. West wind 3 to 8 mph.
Mostly Clear
Lo 20 °F
Mostly clear, with a low around 20. West wind around 6 mph.
Mostly Sunny
Hi 38 °F
Mostly sunny, with a high near 38. Southwest wind around 7 mph.
Light Snow
Lo 33 °F
Snow before 11pm, then rain between 11pm and 3am, then snow. Cloudy, with a low around 33. South wind around 7 mph. Chance of precipitation is 90%. New snow accumulation of less than one inch possible.
Light Snow Likely then Slight Chance Snow Showers
Hi 42 °F
Snow likely before 7am, then rain showers likely between 7am and 4pm, then a slight chance of snow showers. Mostly cloudy, with a high near 42. Southwest wind 8 to 17 mph, with gusts as high as 33 mph. Chance of precipitation is 70%. Little or no snow accumulation expected.
Mostly Clear
Lo 25 °F
Mostly clear, with a low around 25. West wind around 16 mph, with gusts as high as 30 mph.
Sunny
Hi 31 °F
Sunny, with a high near 31. Northwest wind around 14 mph, with gusts as high as 30 mph.
Mostly Clear
Lo 18 °F
Mostly clear, with a low around 18. West wind 7 to 12 mph.
Mostly Sunny then Slight Chance Snow Showers
Hi 35 °F
A slight chance of snow showers after 5pm. Mostly sunny, with a high near 35. West wind around 8 mph.
Chance Snow Showers
Lo 21 °F
A chance of snow showers. Mostly cloudy, with a low around 21. West wind around 6 mph. Chance of precipitation is 30%.
Mostly Sunny
Hi 37 °F
Mostly sunny, with a high near 37. Northwest wind around 7 mph.
Mostly Cloudy
Lo 25 °F
Mostly cloudy, with a low around 25. West wind around 6 mph.
Slight Chance Snow Showers then Chance Light Rain
Hi 42 °F
A slight chance of snow showers before 7am, then a slight chance of snow between 7am and 9am, then a chance of rain. Partly sunny, with a high near 42. Southwest wind around 7 mph. Chance of precipitation is 30%.
Issued by:
National Weather Service Boston / Norton, MA
Updated Mon Dec 2, 2024 6:16pm EST
000 FXUS61 KBOX 022315 AFDBOX Area Forecast Discussion National Weather Service Boston/Norton MA 615 PM EST Mon Dec 2 2024 .SYNOPSIS... Mainly sunny and dry weather is expected through Tuesday, although a cold airmass will continue to yield below normal temperatures and periods of ocean effect cloudiness for the Cape and Islands. Next chance for precipitation comes Wednesday night into Thursday, as a clipper system brings rain near the coast and accumulating snowfall in the interior. An colder airmass moves in Friday and into the weekend, likely with the coldest air of the season thus far. && .NEAR TERM /UNTIL 6 AM TUESDAY MORNING/... 615 PM Update: Sct-bkn strato-cu lingering across portions of SNE but these clouds are expected to clear tonight. Otherwise, ocean effect strato-cu developing over the ocean north of Cape Cod and these clouds expected to fill in across the outer Cape and Nantucket through the night. Otherwise, a mainly clear night with light WNW winds becoming near calm overnight. This means another very chilly night is in store with strong radiational cooling expected. With little change in thermal airmass, largely used persistence as a basis for tonight's lows. The lone exception is across the Mid-Cape and Outer Cape where an increasing coverage of ocean effect stratocumulus and modest NW breeze should limit radiational cooling and bring lows closer to the mid/upper 20s. The larger metro cities should stay in the lower 20s but most areas elsewhere should dip into the teens. && .SHORT TERM /6 AM TUESDAY MORNING THROUGH TUESDAY NIGHT/... 120 PM Update: Little change in the governing synoptic regime for Tues, with high pressure to our south supplying continued dry weather and a light westerly wind. The shift in the winds to more of a westerly flow, a less favorable direction for ocean effect over land, should in turn shut off ocean effect cloudiness over the Outer Cape early in the day. Thus mostly clear skies but still a rather chilly and dry day with highs in the 30s, but may struggle to reach the freezing mark over the higher terrain of the Berkshires and hills in Worcester and Tolland Counties. For Tues night, modest change takes place with 500 mb longwave trough axis and associated 925-850 mb thermal trough moving eastward and offshore. Although we still expect clear skies and light winds favoring efficient radiational cooling, we will see more in the way of lower- tropospheric warm advection. Still ends up being another rather cold night, and though it may not necessarily feel much different, lows should be a couple degrees warmer in the upper teens to the mid 20s. && .LONG TERM /WEDNESDAY THROUGH MONDAY/... Key Messages... * Accumulating snowfall likely Wed night into early Thu, especially west of I-495 with mainly rain in the coastal plain. * Turning colder Thu night into the weekend with temps well below normal * Strong wind gusts developing Wed night Cape/Islands and late Thu into Fri rest of SNE Wednesday... Surface ridging moves across SNE then to the east by days end ahead of next approaching system from the Gt Lakes. Plenty of sunshine to start the day, then developing warm advection pattern within SW flow will bring increasing clouds in the afternoon. However, it should remain dry through the day with precip holding off until evening. Highs will range from the mid 30s to lower 40s with increasing SW winds 10-20 mph in the afternoon. Wednesday night into Thursday... Deep upper level low dives into the Gt Lakes Wed night before moving across New Eng on Thu. Diffluent flow aloft Wed night ahead of the trough with favorable left exit region of the upper jet will provide strong large scale forcing for ascent. Decent SW low level jet will bring increasing moisture with saturated column developing through a deep layer. This will bring a period of widespread precip Wed night into early Thu with expected QPF amounts of 0.25 to 0.50". The column is cold enough for snow in the interior west of I-95 with mostly rain along and SE of I-95, although a rain-snow mix is possible along the I-95 corridor. Highest snow amounts will be over higher elevations where temps will be coldest. Preliminary forecast accums of 3-6 inches is possible over the Berkshires and Worcester Hills, with 1-3 inches across the rest of the interior. This is line with ECWMF and GEFS ensembles showing high probs (60-90%) of 3+ inches over the elevated terrain, with high probs (90%+) of 1 inch across the interior. No snow accums are expected near the coast. Fortunately, the bulk of the snow will begin after the Wed evening commute although the morning commute will be impacted. Best moisture will be lifting out Thu morning so interior snow will begin to taper off, although scattered rain and higher elevation snow showers likely to continue as the upper low and arctic front moves into the region. Clearing Thu night and windy and colder with lows dropping into the upper teens to mid 20s. Decent SW low level jet developing Wed night will likely bring a period of strong wind gusts across the Cape/Islands. Model soundings suggest potential for a period of 40-50 mph gusts here and wind advisories may eventually be needed. Then strong W wind gusts will develop across rest of SNE late Thu and especially Thu night in the cold advection with marginal wind advisory criteria possible. Friday through Monday... Blustery and cold Fri as 850 mb temps bottoming out near -14C. Highs will range from the upper 20s to mid 30s and the cold conditions will continue into Sat but with less wind. Another fast moving northern stream shortwave and clipper may bring some light snow sometime Sat or Sat night but low confidence on timing. Drying out Sunday, then next system approaches next Monday with rain or a mix as milder air will be moving in as southerly flow develops. && .AVIATION /23Z MONDAY THROUGH SATURDAY/... Forecast Confidence Levels: Low - less than 30 percent. Moderate - 30 to 60 percent. High - greater than 60 percent. 00z TAF Update: Through Tuesday Night: High confidence. VFR through the period. WNW winds will trend light/calm overnight for most areas except 5-8 kt for BOS and the Cape airports. For Tuesday, winds become more WNW to W, then become light W to WSW for Tuesday night. KBOS Terminal...High confidence in TAF. WNW winds under 10 kt becoming around 5-8 kt tonight. W winds for Tue around 5-8 kt before becoming light W/WSW Tue night. KBDL Terminal...High confidence in TAF. WNW winds around 5-8 kt through the afternoon, trending light/variable overnight. Light W winds for Tue then becoming WSW Tue night. Outlook /Wednesday through Saturday/... Wednesday: VFR. Breezy. Wednesday Night: MVFR/IFR conditions possible. Windy with gusts up to 35 kt. SN, RA. Thursday: Mainly MVFR, with local IFR possible. Windy with gusts up to 35 kt. Chance SHRA, chance SHSN. Thursday Night: VFR. Windy with gusts up to 35 kt. Friday: VFR. Windy with gusts up to 30 kt. Friday Night: VFR. Breezy. Saturday: VFR. Breezy. Slight chance SHSN. && .MARINE... Forecaster Confidence Levels: Low - less than 30 percent. Medium - 30 to 60 percent. High - greater than 60 percent. Generally tranquil winds and sea conditions for boaters through Tuesday night. WNW to W winds around 10-15 kt thru Tue, then becoming W/WSW around 15 kt for Tue night. Seas thru Tue night 3 ft or less all waters. Dry weather is expected, although ocean effect cloudiness over the eastern waters could produce a sprinkle or flurry over the outer waters. Outlook /Wednesday through Saturday/... Wednesday: Winds less than 25 kt. Slight chance of rain. Wednesday Night: Low risk for gale force winds with gusts up to 35 kt. Areas of rough seas. Rain. Thursday: Moderate risk for gale force winds with gusts up to 40 kt. Rough seas up to 14 ft. Rain showers. Thursday Night: gale force winds with gusts up to 40 kt. Rough seas up to 14 ft. Slight chance of rain showers. Friday: Strong winds with gusts up to 35 kt. Rough seas up to 11 ft. Friday Night: Moderate risk for Small Craft Advisory winds with gusts up to 30 kt. Areas of rough seas. Saturday: Winds less than 25 kt. Areas of seas approaching 5 ft. Slight chance of rain showers, slight chance of snow showers. && .BOX WATCHES/WARNINGS/ADVISORIES... CT...None. MA...None. RI...None. MARINE...Gale Watch from Wednesday evening through Thursday evening for ANZ232>235-237-255-256. && $$ SYNOPSIS...KJC/Loconto NEAR TERM...KJC/Loconto SHORT TERM...Loconto LONG TERM...KJC AVIATION...KJC/Loconto MARINE...KJC/Loconto
Radar images courtesy Weather Underground / Intellicast.
UV Index forecast high for today: 1 Low
Current (Estimated): 0 None
Note: Rain measured automatically by weather station. Rain totals do not necessarily include melted frozen precipitation.
For more accurate, manually measured rain data, see the Local Precip Data page.
0.00 in
Rain Rate (/hr):
0.00 in
Rain Last 60 min:
0.00 in
Rain Today:
0.00 in
Sunday:
0.00 in
December:
40.42 in
2024
1:01pm
37.6°F
High today:
7:20am
23.7°F
Low today:
1:18pm
36.7°F
High Sunday:
7:27am
26.8°F
Low Sunday:
7:20am
23.7°F
Low wind chill today:
5:53am
20.5°F
Low wind chill Sunday:
10:41am
23.2°F
High dew pt today:
12:03am
23.2°F
High dew pt Sunday:
9:23am
5 mph
Wind gust today:
11:01am
10 mph
Wind gust Sunday:
No alerts/warnings active for Southeast Middlesex County.
First Light:
6:25am
Sunrise:
6:56am
Sunset:
4:13pm
Twilight ends:
4:44pm
Daylight length:
9 hours 16 minutes
Phase:
Waxing Crescent (4%)
Moon rise:
8:38am
Moon set:
4:57pm
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