Lexington Weather

Lexington, Massachusetts, USA

44°F

11/14/2025 3:21pm

Lexington Conditions: Mostly cloudy
Temperature: 43.5°F / 6.4°C
Dew Point: 28.4°F
Relative Humidity: 55%
Wind: Calm, 10-min avg: Calm, gust: None
Barometer: 29.86 in Steady
Visibility: 10 miles
Rain Today: 0.00 in

Area Forecast Discussion
for Boston / Norton, MA

        
000
FXUS61 KBOX 120537
AFDBOX

Area Forecast Discussion
National Weather Service Boston/Norton MA
1237 AM EST Wed Nov 12 2025

.SYNOPSIS...
Mainly dry, blustery and much colder today, although a few
passing flurries or snow showers are possible, especially in 
the Berkshires. Blustery weather and below normal temperatures 
continue through the rest of this week into Saturday with 
nothing more than a few brief passing rain/snow showers. A 
frontal system may bring mostly rain next Sunday with drier 
conditions Monday.

&&

.NEAR TERM /UNTIL 6 AM THIS MORNING/...
Key Messages:

* Gusty winds continue into the evening before winding down
  after midnight

* Chilly with sub-freezing lows and wind chills in the 20s. 

Flurries and snow showers continued to diminish for most this
evening. Still expected to linger a bit longer towards the
Berkshires. Otherwise, clearing skies with diminishing winds
overnight. Tweaked forecast for the next few hours to reflect
observed trends.

Previous Discussion...

Gusty winds from this afternoon persist through about midnight 
before an upper-level trough axis and associated low-level jet 
shifts east this evening and overnight. Until then, gusty 
westerly winds from 25-35 mph will be possible, with gusts up to
45 mph possible over Nantucket where a Wind Advisory remains in
effect.

Roughly after midnight, a mid-level ridge building over The   
Northeast will allow the pressure gradient to relax and westerly 
winds to diminish. While the stronger 20-30 mph gusts will come 
to an end, westerly winds will still be steady around 10 mph. 
Thus, with mechanical mixing and continued mid-level cloud 
cover, we're not anticipating any significant radiational 
cooling tonight. Nonetheless, the air mass still remains cooler 
than normal and we can expect low temps near or below freezing 
for most of southern New England. Steady winds will have the 
"feels like" temperatures in the 20s for most of the region as 
well.

&&

.SHORT TERM /6 AM THIS MORNING THROUGH 6 PM THURSDAY/...
Key Messages:

* A few rain/snow showers early followed by a slight uptick in 
  temperatures

* Quiet weather tomorrow night with lows once again in the 30s

Weak short-wave energy may trigger a few rain showers over the
south coast, Cape, and Islands early tomorrow morning. Also
can't rule out a few snow showers over The Berkshires and
Worcester Hills, but most locations will remain dry. Southwest
flow develops allowing modest low-level WAA tomorrow afternoon
which will support 925 hPa temps rising a few degrees from
Tuesday. This will result in high temperatures about 5 or 6
degrees higher than Tuesday. Cloudy skies early will give way 
to partial sunshine in the afternoon with steady west winds. 
Skies then scatter out tomorrow night as west/northwest flow 
ushers in a drier air mass. Low temps once again in the low to 
mid 30s.

&&

.LONG TERM /THURSDAY NIGHT THROUGH TUESDAY/...
Key Messages:

* Chilly temperatures continue through the weekend

* A low pressure system will bring rain and possibly frozen 
  precipitation to southern New England Saturday night through 
  Sunday

Thursday through Saturday

Deep northwest flow will support persistent CAA over The
Northeast Thursday through Saturday morning. This will continue 
to support below normal temperatures with daily highs/lows in 
the mid 40s/ upper 20s-low 30s respectively. A dry column and 
surface high pressure should support more sun than clouds during
this time frame.

Saturday night through early next week

By Saturday night, model guidance is revolving a robust pulse of 
short-wave energy digging southeast over The Great Lakes and 
across The Northeast. This is expected to bring substantial 
precipitation to southern New England with 24 hour ensemble mean
precipitation forecast coming in around a half inch.
Additionally, many solutions support a setup that would involve 
warm air aloft overrunning shallow sub-freezing air at the 
surface. This may introduce some precipitation type issues to 
the forecast where we some locations may be dealing with a 
wintry mix. Details are vague at this time range, but this will 
be something to watch closely as we approach the weekend. Strong
cold air advection behind this system will continue to support 
below- normal temperatures as we head into early next week. Stay
tuned for further details.

&&

.AVIATION /06Z WEDNESDAY THROUGH SUNDAY/...
Forecaster Confidence Levels...

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

06z update...

Today...High confidence.

VFR cigs. A few showers possible over the Cape/Islands 14-18z. 
SW wind 10-20 kt, gusts 25-30 kt Cape/Islands. 

Tonight...High Confidence.

Mainly VFR cigs with clouds scattering out overnight. West wind
5-10 kt, with gusts 15-20 kt at ACK. 

Thursday...High confidence. 

VFR. Increasing NW winds with gusts to 20-25 kt developing. 

KBOS Terminal...High confidence.

KBDL Terminal...High confidence.

Outlook /Thursday Night through Sunday/... 

Thursday Night through Saturday: VFR. Breezy.

&&

.MARINE...
Forecaster Confidence Levels...

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

Key Messages:

* Gale force winds continue overnight before diminishing
  tomorrow morning

Gusty gale force westerly winds continue this afternoon and
evening over the coastal waters. Winds weaken below gale force 
tomorrow morning, but Small Craft Advisory conditions persist 
through tomorrow afternoon for most of the marine zones. Expect 
faster improvement over the eastern waters where conditions
improve by early-mid afternoon. Seas over outer southern marine
zones remain elevated through tomorrow night with significant 
wave heights between 6 and 8 feet.

Outlook /Thursday Night through Sunday/... 

Wednesday Night: Low risk for Small Craft Advisory winds with
gusts up to 25 kt. Areas of rough seas. Slight chance of rain. 

Thursday: Low risk for Small Craft Advisory winds with gusts up
to 30 kt. Local rough seas. Chance of rain. 

Thursday Night: Moderate risk for Small Craft Advisory winds
with gusts up to 30 kt. Areas of rough seas. Chance of rain. 

Friday: Low risk for Small Craft Advisory winds with gusts up
to 25 kt. Local rough seas. Slight chance of rain. 

Friday Night: Low risk for Small Craft Advisory winds with
gusts up to 25 kt. Areas of seas approaching 5 ft. Slight
chance of rain. 

Saturday: Winds less than 25 kt. Seas locally approaching 5 ft.

&&

.BOX WATCHES/WARNINGS/ADVISORIES...
CT...None.
MA...None.
RI...None.
MARINE...Small Craft Advisory until 3 PM EST this afternoon for ANZ230.
     Gale Warning until 7 AM EST this morning for ANZ231-250-251-
     254>256.
     Gale Warning until 4 AM EST early this morning for ANZ232>235-
     237.
     Small Craft Advisory until 6 PM EST this evening for ANZ236.

&&

$$

SYNOPSIS...RM
NEAR TERM...Belk/KJC/RM
SHORT TERM...RM
LONG TERM...KJC/RM
AVIATION...KJC
MARINE...KJC/RM