Lexington Weather

Lexington, Massachusetts, USA

54°F

11/10/2025 2:31am

Lexington Conditions: Fog, Overcast
Temperature: 54.0°F / 12.2°C
Dew Point: 52.9°F
Relative Humidity: 96%
Wind: Calm, 10-min avg: Calm, gust: None
Barometer: 29.62 in Falling Slowly
Visibility: ¼ mile
Rain Today: 0.00 in

Southeast Middlesex County, MA - Special Weather Statement
- SEE ALL NEARBY ALERTS -

Area Forecast Discussion
for Boston / Norton, MA

        
000
FXUS61 KBOX 061652
AFDBOX

Area Forecast Discussion
National Weather Service Boston/Norton MA
1152 AM EST Thu Nov 6 2025

.SYNOPSIS...
Gusty northwest winds will diminish this afternoon. High 
pressure building in tonight brings a clear and chilly night, 
but clouds increase again Friday to go along with increasing 
southwest breezes. A cold front approaches Friday night into 
early Saturday with a period of showers, followed by dry and 
mild weather Saturday afternoon. Another cold front brings more 
showers to the region sometime Sunday into early Monday, 
followed by much chillier weather later Monday and especially by
Tuesday.

&&

.NEAR TERM /UNTIL 6 PM THIS EVENING/...
600 AM Update:

Key Messages: 

* Windy through early-morning, with gusts in the 35-45 mph
  range; gusts steadily decrease through the day. 

* Mix of sun and clouds, dry with highs in the upper 40s to mid 50s.

Details:

Just a quick update that previous wind advisories which were in
effect were cancelled at 5 AM. Currently just Nantucket was 
still gusting around 45-50 mph, but this ends up short-lived and
the risk for hazardous wind gusts has ended. Remainder of the 
discussion is still valid and is below.

Intervals of sun and stratocumulus clouds today, combined with 
cold advection today will bring a deepening mixed layer. Since 
we'll be able to tap into a deeper portion of the lower 
atmosphere, we could see a secondary perk-up in gusts but BUFKIT
momentum transfer progs suggest winds in the top of the mixed 
layer around 35 kt thru early afternoon. So thinking NW gusts 
more in the 25-35 mph range through the early afternoon, and 
then continuing to decrease as we near sundown. 

Current temps are in the upper 40s to mid 50s; temperatures not 
likely to climb much as sunshine is offset by strong cold advection. 
Highs may only climb a couple degrees from current values.

&&

.SHORT TERM /6 PM THIS EVENING THROUGH 6 PM FRIDAY/...
300 AM Update:

Key Messages: 

* Clear, light winds, rather chilly tonight. Lows in the 20s in most 
  areas!

* Increasing clouds Fri, but dry with modest SW gusts to 25 mph. 
  Highs upper 40s terrain to the mid/upper 50s rest of Southern New 
  England.

Details: 

WNW winds slacken early tonight as p-gradient relaxes. Sfc ridge in 
place with very dry air and 925-850 mb thermal trough at -1 to -3C 
gradually moving offshore. Combined with "solar winter"/longer 
nights, it will set the stage for a rather chilly night, and it 
could end up being one of the coldest nights we've seen in quite
some time. Undercut NBM on lows, with widespread mid/upper 20s 
being pretty common, except around freezing for Boston and out 
over the Outer Cape. 

High pressure then shifts offshore Fri, with returning moderately-
strong warm advection pattern for the aftn. Pretty chilly start to 
Fri and shallow mixing depths too, but despite early-day advance of 
mid to high clouds, temps should rebound into the upper 40s to the 
mid/upper 50s. Tightening SWly pressure gradient supports 20-25 mph 
gusts despite shallow mixing too. NBM too early/aggressive with PoPs 
associated with front, and sided things dry. Better chances after

&&

.LONG TERM /FRIDAY NIGHT THROUGH WEDNESDAY/...
Key Messages:

* One round of showers Fri night into Sat AM followed by another 
  period of showers sometime Sun into early Mon

* Highs mainly in the 50s to near 60 Fri & Sun with Sat the mildest 
  day with highs in the lower to middle 60s

* Turning colder later Mon with highs Tue in the upper 30s & 40s 
  with even some flurries/sprinkles possible 

Details...

This weekend...

A shortwave/cold front crosses the region Fri night into early Sat. 
Ahead of this front...a modest southwest LLJ of 50+ knots coupled 
with a Pwat surge over 1 inch will bring a period of showers 
sometime Fri night into early Sat. Drier weather follows by Sat 
afternoon but the airmass is still quite mild. 850T of +4C or 
greater coupled with good mixing on westerly flow should allow for a 
mild Sat afternoon. High temps should top off in the lower to middle 
60s across much of the region...a solid 10 degrees above normal for 
this time of year. 

Monday through Thursday...

The next low pressure system will be lifting northeastward across 
the eastern Great Lakes and into eastern Canada Sun into early Mon. 
There also may be some secondary development near the coast. This 
should result in another round of showers sometime Sun into early 
Mon. Much chillier weather follows later Mon into Tue as a deep 
upper trough crosses the region. Looking at a slight moderation in 
temps Wednesday as heights rise before a reinforcing shortwave 
arrives Thursday. In fact...high temps on Tue will only be in the 
upper 30s and 40s with a gusty west wind. There might be a few 
flurries/sprinkles with the shortwave trough. Lows Tue night will be 
mainly in the 20s with dry weather following for Wed and highs in 
the 40s to near 50.

&&

.AVIATION /18Z THURSDAY THROUGH TUESDAY/...
Forecaster Confidence Levels...

Low - less than 30 percent. 
Moderate - 30 to 60 percent. 
High - greater than 60 percent.

18z TAF Update: High confidence.

VFR. NW winds will continue to diminish this afternoon before
dropping below 10kt tonight and becoming W. SW winds expected
Fri with 20-25kt gusts in the afternoon, especially near coast.

KBOS Terminal...High confidence in TAF. 

KBDL Terminal...High confidence in TAF.

Outlook /Friday Night through Monday/... 

Friday Night: Mainly MVFR, with areas VFR possible. Windy with 
areas of gusts up to 30 kt. RA likely.

Saturday: Mainly VFR, with local MVFR possible. Breezy. Chance
RA.

Saturday Night: VFR. 

Sunday: MVFR/IFR conditions possible. Breezy. RA likely.

Sunday Night: Mainly VFR, with local IFR possible. Breezy. RA
likely.

Monday: Mainly VFR, with local MVFR possible. Breezy. Chance
RA.

&&

.MARINE...
Forecaster Confidence Levels...

Low - less than 30 percent. 
Medium - 30 to 60 percent. 
High - greater than 60 percent.

Updated 1200 PM Thu

Lowered remaining Gale Warnings on outer waters to Small Craft
Advisories as winds continue to diminish, but expect SCA
conditions through this evening on most of the waters, but
through tonight on outer waters due to lingering 5 ft+ seas.

High pressure building over New England tonight will move
offshore Friday, resulting in increasing SW winds that should
reach 25kt Friday afternoon and Friday night, with a low chance
of seeing marginal 34kt Gales on south coastal waters. Not
enough confidence though for Gale headlines right now.

Outlook /Saturday through Monday/... 

Saturday: Winds less than 25 kt. Local rough seas. Chance of 
rain. 

Saturday Night: Winds less than 25 kt. Areas of seas
approaching 5 ft. 

Sunday: Low risk for Small Craft Advisory winds with gusts up
to 25 kt. Areas of seas approaching 5 ft. Rain likely. 

Sunday Night: Winds less than 25 kt. Local rough seas. Rain
likely, isolated thunderstorms. 

Monday: Winds less than 25 kt. Areas of rough seas. Chance of
rain. 

&&

.BOX WATCHES/WARNINGS/ADVISORIES...
CT...None.
MA...None.
RI...None.
MARINE...Small Craft Advisory until 4 PM EST this afternoon for ANZ230-
     236.
     Small Craft Advisory until 7 PM EST this evening for 
     ANZ231>235-237-251.
     Small Craft Advisory until 6 AM EST Friday for ANZ250-254>256.

&&

$$

SYNOPSIS...Loconto/FT
NEAR TERM...Loconto
SHORT TERM...Loconto
LONG TERM...FT
AVIATION...JWD
MARINE...JWD