Old Res Weather

Lexington, Massachusetts, USA

35°F

2/16/2025 7:17pm

Lexington Conditions: Clear
Temperature: 35.1°F / 1.7°C
Dew Point: 32.4°F
Relative Humidity: 90%
Wind: Calm, 10-min avg: Calm, gust: None
Barometer: 29.00 in Falling Slowly
Visibility: 10 miles
Rain Today: 0.01 in
UV Index: $VPuv None

Area Forecast Discussion
for Boston / Norton, MA

        
000
FXUS61 KBOX 261854
AFDBOX

Area Forecast Discussion
National Weather Service Boston/Norton MA
254 PM EDT Mon Oct 26 2026

.WHAT HAS CHANGED...
No meaningful changes to the forecast, with an extended stretch of 
quiet and dry weather ahead.

&&

.KEY MESSAGES...

- Prolonged stretch of dry weather through the first 
half of the upcoming weekend. Seasonably cool temperatures Tuesday 
through midweek followed by period of warmer temperatures later in 
the work week. 


&&

.DISCUSSION...
KEY MESSAGE 1...Prolonged stretch of dry weather through the first 
half of the upcoming weekend. Seasonably cool temperatures Tuesday 
through midweek followed by period of warmer temperatures later in 
the work week. 

A cold front pushes southward into southern New England tonight. 
This front will be fairly moisture-starved limiting it's impacts to 
a period of breezy northerly winds overnight accompanied by 
advection of a cooler airmass. 

Upper ridging and surface high pressure will dominate through the 
upcoming weekend favoring dry weather. Southern New England will be 
in a cooler post-frontal airmass Tuesday with 925mb temperatures 
ranging +1C to +4C. This will support high temperatures in the mid 
to upper 50s. Locations along the Cape/Islands and even portions of 
the east coast may be limited to the low 50s given the N/NNE onshore 
wind component. The cool airmass in place combined with light winds 
and clear skies will favor efficient radiational cooling Tuesday 
night into Wednesday. Temperatures are likely to fall into the upper 
20s and 30s. The higher terrain, valleys, and other radiator spots 
have potential to see mid 20s with even a some spots in the low 20s! 

Similar conditions prevail Wednesday. Temperatures trend slightly 
warmer as a mid level ridge shifts further east into the region 
accompanied by warmer temperatures aloft. The warming trend in 
temperatures continues into late-week resulting in 925mb 
temperatures warming to +10 to +13C. This will yield high 
temperatures in the mid-60s on Thursday which is seasonably warm for 
this time of year. Despite the mid-level pattern becoming more zonal 
Friday (ahead of our next weak wave), the westerly flow will support 
efficient mixing in the boundary. This will result in a breezy, but 
likely the warmest day of the week with high temperatures in the 
upper 60s and even low 70s in portions of southern New England. NBM 
highlights moderate to high probabilities(60%-80%+) for 70F or 
greater across the valleys, CT, and I-95 corridor. Therefore a 
larger portion of southern New England, with the exception of the 
higher elevations and Cape/Islands, will have a good shot at hitting 
the 70 degree mark on Friday. 

Another moisture-starved shortwave and cold front moves overnight 
Friday. This will bring back temperatures into the low 60s for the 
weekend which is seasonable for late-October. Looking further ahead 
to the latter half of the weekend and next week, ensemble guidance 
shows agreement with a transition to a generally unsettled pattern 
which may feature periodic chances for showers. Confidence decreases 
with respect to the details such as timing. 

&&

.AVIATION /18Z MONDAY THROUGH SATURDAY/...
Forecaster Confidence Levels...

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

18Z TAF Update:

Today and Tonight...High confidence.

VFR conditions. W to WNW winds this afternoon at 6-12 kts.
Occasional gusts of 18-20 kts possible for Cape/Islands. A cold
front pushes through the region between 00-04Z. No rain
expected; however, this will bring a windshift to the NW/NNW
with gusts 18-25 kts. Highest gusts for Cape and Islands. SCT to
BKN cloud decks accompany the front, but likely to be mid-level
(050-100).

Tuesday...High confidence. 

VFR. Gusts subside by 12Z for most terminals while Cape/Island
terminals will see lingering gusts through early afternoon.
Winds N/NNE at 7-14 kts. 

KBOS Terminal...High confidence.

KBDL Terminal...High confidence.

Outlook /Tuesday Night through Saturday/...

Wednesday through Wednesday Night: VFR. 

Thursday through Thursday Night: VFR. Breezy. 

Friday through Saturday: VFR. 

&&

.MARINE...
Forecaster Confidence Levels...

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

Through Tuesday...High confidence.

A moisture-starved cold front pushes across the coastal waters
00-04Z bringing a wind shift to the N with a period of gusts
around 25 kts across the eastern and southeastern waters. Gusts
decrease to less than 25 kts by 12Z Tuesday. Seas build to 3 to
5 ft across the outer waters tonight into Tuesday. As a result,
Small Craft Advisories in effect tonight into Tuesday for the 
aforementioned waters. It is possible 5 ft seas may linger along 
the outermost borders of the outer water zones Tuesday. 

Outlook /Tuesday Night through Saturday/...

Wednesday through Thursday: Winds less than 25 kt. 

Thursday Night through 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 from 2 AM to 11 AM EDT Tuesday for ANZ231-
     232-250-251-254-255.

&&

$$

DISCUSSION...Mensch
AVIATION...Mensch
MARINE...Mensch