Lexington Weather

Lexington, Massachusetts, USA

34°F

2/25/2026 8:30pm

Lexington Conditions: Clear
Temperature: 34.0°F / 1.1°C
Dew Point: 30.2°F
Relative Humidity: 86%
Wind: Calm, 10-min avg: Calm, gust: 3 mph
Barometer: 29.63 in Rising Slowly
Visibility: 10 miles
Snow Today: 0.5 in

Area Forecast Discussion
for Boston / Norton, MA

        
000
FXUS61 KBOX 241150
AFDBOX

Area Forecast Discussion
National Weather Service Boston/Norton MA
650 AM EST Tue Feb 24 2026

.WHAT HAS CHANGED...
Coastal flood advisory has been allowed to expire. Only alerts
that remain are Small Craft Advisories. 

&&

.KEY MESSAGES...

- Mostly clear Today before a warm front pushes through Tonight  
  night into Wednesday accompanied by some light snow.

- Expecting another unsettled pattern for the mid and late week
  timeframe. A clipper system should bring light precipitation
  Wednesday. Another coastal low pressure has the potential to
  bring yet another round of unsettled weather some time late
  Thursday into Friday.

&&

.DISCUSSION...
KEY MESSAGE 1...Mostly clear Today before a warm front pushes
through tonight night into Wednesday accompanied by some light 
snow.

Expecting Tuesday to remain mostly dry and sunny with afternoon 
highs around 32 and overnight lows dropping into the single
digits and low teens. Late Tuesday night into Wednesday morning 
will see the arrival of warm front preceding a fast moving
clipper system moving out of the Great Lakes Wednesday. This
warm front will bring chances for another round of wintry
precip, with highest confidence of accumulation across interior 
southern New England. Not expecting large accumulations with 
this system at this time.

KEY MESSAGE 2...Expecting another unsettled pattern for the mid
and late week timeframe. A clipper system should bring light 
precipitation Wednesday. Another coastal low pressure has the 
potential to bring yet another round of unsettled weather some 
time late Thursday into Friday.

Trending warmer Wednesday as a clipper system moves across
southeast Canada and northern New England. Timing will be
everything with this low pressure. Light snow most likely
during the nighttime hours. Increased S to SW winds should boost
temperatures above freezing, eventually leading to a transition
to rain across the coastal plain by the afternoon. Much lighter
snowfall of 1-3" is anticipated before that can happen, with the
highest accumulations towards the higher terrain of the
Berkshires and the Worcester Hills. 

Ensemble guidance is hinting at impacts from another area of 
low pressure some time late Thursday into Friday. As we have
said many time this winter, the exact track and strength details
are highly uncertain this far into the future. That being said,
ensemble guidance has shown the possibility of a track to our
south, providing more of a glancing pass from a much weaker low
pressure that what we had yesterday. Again, we are nearly 3 
days away from this system so exact details will be resolved
with future forecast updates.

&&

.AVIATION /12Z TUESDAY THROUGH SATURDAY/...
Forecaster Confidence Levels...

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

Today and Tonight...High Confidence. Moderate confidence
Wednesday.

VFR today and much of tonight. West/Northwest winds gusting up 
to 25 knots until early afternoon, gradually diminish and
transition to more westerly by evening. Shallow strato-cu 
expected this afternoon, resulting in SCT035-045. Fast moving 
system should bring -SN chances late tonight/first thing
Wednesday morning. Timing looks like 08-10z across the west and
11-13z in the east. Expect a period of IFR. The -SN may mix or
change to some -RN prior to ending by 18z.  

KBOS Terminal...High confidence in TAF.

KBDL Terminal...High confidence in TAF.

Outlook /Wednesday through Saturday/...

Wednesday: MVFR/IFR conditions possible. Breezy. SN, slight
chance RA.

Wednesday Night: Mainly VFR, with local MVFR possible. Breezy. 

Thursday through Thursday Night: VFR. Chance SN.

Friday: VFR. Slight chance SN.

Friday Night through Saturday: VFR.

&&

.MARINE...
Forecaster Confidence Levels...

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

Winds continue to subside, and Gale Warnings have been replaced
by Small Craft Advisories. Small Craft Advisory conditions 
gradually diminishing through today into tonight. It will take 
some time for seas to subside across the outer coastal waters 
after yesterdays storm.

Outlook /Wednesday through Saturday/...

Wednesday: Low risk for Small Craft Advisory winds with gusts
up to 25 kt. Local rough seas. Snow, chance of rain. Local
visibility 1 nm or less.

Wednesday Night: Winds less than 25 kt. Areas of rough seas. 

Thursday: Winds less than 25 kt. Local rough seas. Chance of
snow, chance of rain. 

Thursday Night: Winds less than 25 kt. Local rough seas. Chance
of rain, chance of snow. Areas of visibility 1 to 3 nm.

Friday: Winds less than 25 kt. Local rough seas. Chance of
snow, slight chance of rain. 

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

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 7 AM EST this morning for ANZ230-
     233-234.
     Small Craft Advisory until 7 PM EST this evening for ANZ231-
     251.
     Small Craft Advisory until 4 PM EST this afternoon for ANZ232.
     Small Craft Advisory until 10 AM EST this morning for ANZ235-
     237.
     Small Craft Advisory until 10 PM EST this evening for ANZ250.
     Small Craft Advisory until 7 AM EST Wednesday for ANZ254-255.
     Small Craft Advisory until 1 AM EST Wednesday for ANZ256.

&&

$$

DISCUSSION...Belk/McMinn/JWD
AVIATION...Belk/McMinn/Nash
MARINE...Belk/McMinn/Nash