Lexington Weather

Lexington, Massachusetts, USA

53°F

4/11/2026 2:21am

Lexington Conditions: Mostly cloudy
Temperature: 53.1°F / 11.7°C
Dew Point: 36.3°F
Relative Humidity: 53%
Wind: Calm, 10-min avg: Calm, gust: None
Barometer: 29.96 in Falling Slowly
Visibility: 10 miles
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 061928
AFDBOX

Area Forecast Discussion
National Weather Service Boston/Norton MA
328 PM EDT Mon Apr 6 2026

.WHAT HAS CHANGED...
Monitoring late tonight into early Tuesday for snow showers.
Otherwise, dry weather with increasing southerly winds Wednesday
and Thursday could lead to fire weather concerns.

&&

.KEY MESSAGES...

- Weak system moves through tonight into Tuesday bringing light
  rain/snow showers. No accumulation expected. 

- Gradual warming trend starts Wed and Thurs, although it will
  be quite dry to go along with increasing south winds on Thurs.

- Mild and dry Friday heralds a cold frontal passage Sat but
  with limited rain chances. Onshore flow/possible backdoor
  frontal boundary then ushers in a cooldown for Sun.

&&

.DISCUSSION...
KEY MESSAGE 1...Weak system moves through tonight into Tuesday 
bringing light rain/snow showers. No accumulation expected. 

A deeper upper-level trough shifts across the region tonight and 
Tuesday. This trough brings along a cold pool aloft with 500mb 
temperatures around -30C and 925mb temperatures -3C to 1C. A 
shortwave trough moves through the flow aloft supporting some weak 
lift and marginal moisture and even a little instability to support 
scattered "popcorn" showers. Considering that we have such cool 
temperatures aloft, this should support light snow showers for the 
higher elevations and snow mixing in elsewhere. Given weak 
convective element, can't rule out even a little graupel in any 
showers. High-resolution guidance is still lacking agreement on the 
finer details of the timing and shower coverage. Overall there is a 
signal for a few showers very early Tuesday AM.  Probabilities 
increase (30-45%) for scattered showers closer to 7/8AM and after as 
the main surface low tracks across the region. Any snow/frozen 
precip accumulation would be very light and little impact. Worst 
case 1". Temperatures will be below normal in the 40s. 

KEY MESSAGE 2...Gradual warming trend starts Wed and Thurs, although 
it will be quite dry to go along with increasing south winds on 
Thurs.

Rather strong 1038+ mb high pressure cell south of Nova Scotia early 
Wed will extend a surface ridge southwestward through the Southern 
New England coastline into the mid-Atlantic and central 
Appalachians, remaining more or less in place into Thurs. Warming 
925 to 850 mb temps and full sunshine should permit a general 
warming trend thru Thurs with highs on Wed in the mid 40s to low 50s 
(low 40s near the coast) and into the 50s in most areas by Thurs. 
With a few days of generally dry weather early this week, fire 
weather concerns are possible on both days, as dewpoints drop into 
the teens to low 20s in the pre-greenup period allowing for minimum 
RH's in the 20 to 25 percent range from the coast. Although 
southerly winds are on the light side Wed, they pick up a little 
more on Thurs with gusts around 20-25 mph, so Thurs probably offers 
the strongest chance for fire weather concerns. 

KEY MESSAGE 3...Mild and dry Friday heralds a cold frontal passage 
Sat but with limited rain chances. Onshore flow/possible backdoor 
frontal boundary then ushers in a cooldown for Sun.  

Looks like one final day of full sun and even milder temps back into 
the mid 60s Friday, so it looks like Fri ends up as the pick of the 
workweek. Sat starts off mostly sunny, but will have increasing 
cloud cover as a weakening frontal system moves through Southern New 
England during the afternoon to first part of the evening. This 
frontal boundary won't have much moisture to work with, and it may 
just result in some enhanced cloudiness with limited prospects for 
rain showers. Looks like late Sat night or into Sunday, guidance 
continues to show presence of a NE onshore flow/possible backdoor 
front with cool 850 mb temps 0 to -2C. It's still early but it 
doesn't look like there is a signficant amount of RH and pressure 
gradient doesn't look too strong, so this backdoor front doesn't 
look to be as pronounced in terms of strong onshore winds and as 
overcast as e.g. this past Saturday's backdoor front was. 
Regardless, expect a cooldown as we move into the latter part of the 
weekend, though temperatures start to modify once again as we move 
into early next week.

&&

.AVIATION /19Z MONDAY THROUGH SATURDAY/...
Forecaster Confidence Levels...

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

18 TAF Update...

Today: High confidence.

VFR. WNW winds 10-20 kts and gusts 20-30 kt. Highest gusts for
higher elevations and Cape/Island terminals. 

Tonight: High confidence overall, moderate on possible precip 
chances. 

SCT-OVC cloud decks return overnight, VFR mostly. There is still
uncertainty on the timing and coverage/chances of showers
tonight. There is potential for brief -SHRASN after 06Z with
pockets of brief MVFR possible. Gusts diminish by 01Z with W
winds less than 10 kts. Winds become light and variable after
06Z. 

Tuesday: Moderate confidence.

VFR with periods of MVFR ceilings improving to VFR mid
afternoon/early evening. Scattered, brief -RASN showers Tuesday
AM through early afternoon. Timing and coveraging lower 
confidence. Winds will shift through the day as a surface low 
passes through. Light SE flow to start, eventually shifting to 
NW from west to east in the afternoon. NW winds will trend 
stronger 10-15 kts with gusts around 20 kts. 


Tuesday Night: High confidence. 

VFR conditions. NW winds 8-12 kts, a few gusts up to 20 kts
possible. 

KBOS Terminal...Moderate Confidence in TAF.

Few -RASN showers early after 09Z through 12Z, messaged as a
PROB30 due to uncertainty in model guidance and low coverage of
SH. Probabilities for scattered showers increase more toward
12Z, so included in TAF for -SHRASN through the afternoon.
Showers will likely be brief in nature with MVFR ceilings. SE
winds in the early AM shift to E/ENE by noon, shifting N late 
in afternoon. 

KBDL Terminal...High Confidence in TAF.

Outlook /Tuesday Night through Saturday/...

Wednesday through Wednesday Night: VFR. 

Thursday through Thursday Night: VFR. Breezy. 

Friday: VFR. 

Friday Night: VFR. Slight chance SHRA.

Saturday: VFR. 

&&

.MARINE...
Forecaster Confidence Levels...

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

High confidence.

Gusty winds diminish this evening with seas 2-4 ft. This will allow 
the small craft advisories to be dropped this evening. 


Low pressure moves across region Tuesday with winds shifting 
through the day from SE,eventually around to the N/NW late
afternoon-early evening. Northwesterly wind gusts may approach 
SCA levels Tuesday evening across the southern waters ahead of 
an approaching high pressure system.

Outlook /Tuesday Night through Saturday/...

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

Wednesday Night through Thursday Night: Winds less than 25 kt. 

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

Friday Night through Saturday: Winds less than 25 kt. Seas up
to 5 ft. 

&&

.BOX WATCHES/WARNINGS/ADVISORIES...
CT...None.
MA...None.
RI...None.
MARINE...Small Craft Advisory until 8 PM EDT this evening for 
     ANZ254>256.

&&

$$

DISCUSSION...Loconto/Mensch
AVIATION...Loconto/Mensch
MARINE...Loconto/Mensch