Lexington Weather

Lexington, Massachusetts, USA

63°F

6/10/2026 6:10am

Lexington Conditions: Clear
Temperature: 63.0°F / 17.2°C
Dew Point: 54.9°F
Relative Humidity: 75%
Wind: Calm, 10-min avg: Calm, gust: 2 mph
Barometer: 29.88 in Steady
Visibility: 10 miles
Rain Today: 0.00 in

Area Forecast Discussion
for Boston / Norton, MA

        
000
FXUS61 KBOX 071156
AFDBOX

Area Forecast Discussion
National Weather Service Boston/Norton MA
756 AM EDT Sun Jun 7 2026

.WHAT HAS CHANGED...
No significant forecast changes.

&&

.KEY MESSAGES...

- Scattered showers and isolated thunderstorms return Sunday
  afternoon into early evening, focused mainly across eastern 
  New England. Cooler and drier conditions arrive Sunday night.
 
- Dry with seasonable temperatures Monday.
 
- Summerlike heat and humidity returns next week, no notable
  storms, though a front may bring a period of showers and
  thunderstorms mid to late week.

&&

.DISCUSSION...
KEY MESSAGE 1...Scattered showers and isolated thunderstorms return 
Sunday afternoon into early evening, focused mainly across eastern 
New England. Cooler and drier conditions arrive Sunday night.

Subsidence behind the departing front allows for mainly clear skies 
this morning, though this will be short-lived as a mid-level trough 
and accompanying shortwave push south out of northern New England 
this afternoon. While forcing aloft appears favorable, surface-based 
instability remains limited, generally less than 500 J/kg. Continued 
thinking supports mainly showery activity this afternoon rather than 
a widespread washout. That said, some showers may be capable of 
producing locally heavy downpours given PWAT values around 1.5 
inches. While severe storms are not anticipated, thunder remains 
possible and, due to colder temperatures aloft, small hail cannot be 
ruled out. Although a few showers will be possible across the entire 
region, areal coverage should be greatest across central and eastern 
MA as well as RI, where instability appears slightly more favorable. 
Cooler air arrives more gradually, which may allow highs to still 
reach the upper 70s to lower 80s before northeast flow develops 
later in the evening. Otherwise, drier and much cooler air works 
into the region overnight. Lows by daybreak Monday will fall into 
the middle to upper 40s across outlying locations and the lower to 
middle 50s in the urban centers.

KEY MESSAGE 2...Dry with seasonable temperatures Monday.

Sundays mid-level trough exits east of New England by early Monday 
morning as an amplified ridge shifts toward the eastern third of the 
CONUS. The trough eventually evolves into a cutoff mid-level low 
over the Canadian Maritimes, helping to slow the eastward 
progression of the ridge and supporting another stretch of 
summerlike temperatures across southern New England. Monday will 
likely be the coolest day of next week due to north-northeast flow 
aloft draining a cooler airmass southward into the region. Forecast 
soundings Monday afternoon depict a well-mixed atmosphere with the 
boundary layer extending to around 850 mb and temperatures at that 
level ranging from +7C to +10C. Naturally, the farther east, the 
cooler temperatures will be, with Cape Cod, the Islands, Boston, and 
the eastern coastal plain largely remaining in the 70s, while the 
Connecticut River Valley reaches the lower 80s.

KEY MESSAGE 3...Summerlike heat and humidity returns next week, no 
notable storms, though a front may bring a period of showers and 
thunderstorms mid to late week.

Through much of next week, an anomalous ridge extending north toward 
Hudson Bay in Canada favors mainly dry and increasingly hot 
conditions. 850 mb temperatures rise to around +15C Tuesday, then 
increase to around +18C Wednesday through Friday. This should 
support highs in the middle 80s to near 90 Tuesday, followed by 
upper 80s to lower 90s through much of the remainder of the week. 
The first half of next week should feature relatively comfortable 
dewpoints in the 50s. However, by late week, dewpoints rise into the 
60s, leading to a more humid airmass. While outside the forecast 
period, there is a signal for heat to continue into next weekend, 
reflected in CPC outlooks depicting a Slight Risk (20 to 40 percent 
probability) for extreme heat across portions of the Northeast. 
There is still time to assess this signal in forthcoming guidance, 
though heat headlines may eventually be needed for portions of the 
period. In terms of precipitation, there does not appear to be 
anything appreciable on the horizon through much of next week. 
However, a frontal passage later in the week may bring a period of 
showers and thunderstorms as heat and humidity continue to build.

&&

.AVIATION /12Z SUNDAY THROUGH THURSDAY/...
Forecaster Confidence Levels...

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

12Z TAF Update:

Today...Moderate confidence in the areal extent of shower 
activity and period of MVFR. 

VFR. Showers develop after 16Z across northeastern MA, 
expanding across eastern MA and RI after 18Z through the early 
evening hours. While the risk remains low, a few embedded 
thunderstorms are possible as well. Breezy WSW/W winds gusting 
to 20 to 25 kt today shifting WNW this afternoon. Winds shift 
more NW with the arrival of showers. 

Tonight...High confidence.

Ceilings may briefly lower to MVFR as shower activity comes to an 
end, though conditions should return to VFR by 03Z at BOS and by
08Z at FMH/HYA/ACK. Showers end across eastern MA and RI 
between 03-05Z. Winds shift more N behind exited showers. Winds 
shift more NNE for BOS and Cape/Island terminals with a period 
of gusts around 20 kts. Winds/gusts decrease after 03Z. 

Monday...High confidence.

VFR. NE winds around 10 to 15 kt.

KBOS Terminal...High confidence in trends, moderate confidence in 
timing.

A few showers or a weak thunderstorm are possible Sunday between 18Z 
and 00Z, with showers ending between 00-02Z.

KBDL Terminal...High confidence.

Outlook /Monday Night through Thursday/...

Monday Night: VFR. 

Tuesday: VFR. Breezy. 

Tuesday Night: VFR. 

Wednesday: VFR. Breezy. Slight chance SHRA.

Wednesday Night: Mainly VFR, with local IFR possible. Breezy.
Chance SHRA, slight chance TSRA.

Thursday: VFR. Breezy. Slight chance SHRA, slight chance TSRA.

&&

.MARINE...
Forecaster Confidence Levels...

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

Today through Monday...High confidence.

Marginal 5 ft seas will continue across portions of the southern 
waters into Sunday, while the remainder of the waters remain below 
Small Craft Advisory criteria. However, a surge of northerly Small 
Craft Advisory-level wind gusts is expected Sunday night behind the 
departing cold front, especially across the eastern waters, which 
may briefly increase seas as well.

Additional Small Craft headlines may eventually be needed once 
current advisories expire. Seas gradually subside and NE winds fall 
below advisory criteria Monday.

Outlook /Monday Night through Thursday/...

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

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

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

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

Wednesday Night: Low risk for Small Craft Advisory winds with
gusts up to 25 kt. Seas up to 5 ft. Chance of rain showers,
slight chance of thunderstorms. 

Thursday: Winds less than 25 kt. Seas up to 5 ft. Chance of
rain showers, slight chance of thunderstorms. 

&&

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

&&

$$

DISCUSSION...Dooley
AVIATION...Dooley/Mensch
MARINE...Dooley