493
FXUS61 KBOX 081123
AFDBOX

Area Forecast Discussion
National Weather Service Boston/Norton MA
723 AM EDT Mon Jun 8 2026

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

&&

.KEY MESSAGES...

- Pleasant, dry, and seasonable weather today with low humidity
  and abundant sunshine.

- Increasing heat and humidity this week with afternoon
  thunderstorm chances Wednesday through Friday.

&&

.DISCUSSION...
KEY MESSAGE 1...Pleasant, dry, and seasonable weather today with low
humidity and abundant sunshine.

A really nice day is on tap for southern New England, featuring near-
seasonable high temperatures, low humidity, and plenty of sunshine.
With the departure of the mid-level trough toward the Canadian
Maritimes and surface high pressure building in from the west, flow
today will be from the north to north-northeast. Earlier in the day,
the pressure gradient between these two systems will support breezy
winds around 10 to 15 mph, with somewhat higher gusts along the
immediate coast. As the pressure gradient relaxes, winds gradually
shift toward the southeast before becoming south-southwest after
sunset. High temperatures this afternoon will generally range from
the 70s to near 80 degrees, warmest inland and away from the
influence of the ocean. Coastal areas will mainly remain in the
lower 70s, though cannot rule out a few upper 60s across the outer
Cape and Islands.

With high pressure firmly overhead tonight and winds easing,
conditions will favor radiational cooling. Temperatures fall into
the 40s across many locations, while the urban core holds onto
warmth with lows remaining in the middle 50s. Given the rainfall
this past weekend, areas that decouple may experience patchy fog
overnight.

KEY MESSAGE 2...Increasing heat and humidity this week with
afternoon thunderstorm chances Wednesday through Friday.

Summerlike heat and humidity return this week as an anomalous mid-
level ridge and surface high pressure expand into the region.
Tuesday kicks off the warming trend, with 850 mb temperatures
climbing into the middle to upper teens, supporting daily afternoon
highs in the upper 80s to lower 90s. NWS HeatRisk guidance
highlights the potential for heat impacts, with widespread moderate
impacts and isolated pockets of major impacts, particularly across
urban centers by late week. One possible fly in the ointment will be
cloud cover and storm coverage during the middle to latter half of
the week, which could keep temperatures just cool enough to avoid
the need for heat-related headlines. Nevertheless, those who work
outdoors should prepare for another stretch of unseasonably warm
temperatures. Additionally, there will be little in the way of
nighttime relief, with overnight lows generally remaining in the 60s.

As previously mentioned, cloud cover and storm chances increase
during the middle to latter part of the week. By Wednesday, southern
New England will reside near the base of the mid-level ridge with
more zonal flow aloft. This pattern supports the potential for
ribbons of mid-level energy traversing the CONUS, which could
trigger scattered showers and thunderstorms within an increasingly
warm, humid, and unstable airmass. Timing any thunderstorm remains
difficult, as these details are often resolved on the mesoscale.
However, there is moderate confidence in daily afternoon shower and
thunderstorm chances Wednesday through Friday. Summerlike heat may
persist into the upcoming weekend. FWIW, the hazardous weather
outlook currently highlights portions of central and western
southern New England for hazardous heat.

&&

.AVIATION /12Z MONDAY THROUGH FRIDAY/...
Forecaster Confidence Levels...

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

12Z TAF Update:

Today...High confidence.

VFR and dry. NNE/NE winds to begin the day, eventually backing to
the SW between 18-22Z from east to west.

Tonight...High confidence.

VFR and dry. SSW/SW winds 6 to 12 kt. Protected terminals, including
KBED and KORE, may experience light to calm winds with patchy ground
fog.

Tuesday...High confidence.

VFR and dry. WSW/SW winds 8 to 12 kt, with locally stronger gusts
across coastal RI, southeast MA, Cape Cod, and the Islands, where
gusts of 20 to 25 kt are possible.

KBOS Terminal...High confidence.

NNE/NE winds this morning become E to ESE this afternoon, then shift
to the S/SSW by evening.

KBDL Terminal...High confidence.

Outlook /Tuesday Night through Friday/...

Tuesday Night: VFR. Breezy.

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

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

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

Thursday Night: VFR. Slight chance SHRA.

Friday: VFR. 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 Tuesday...High confidence.

In the wake of a departing cold front, north-northeast wind gusts up
to 25 kt will gradually subside this afternoon as high pressure
builds in from the northwest and settles across the southern New
England waters by Tuesday afternoon. This will lead to more tranquil
boating conditions later this afternoon and again Tuesday.

Winds shift to the southwest Tuesday, though sufficient inland
heating may lead to stronger nearshore wind gusts, mainly from Block
Island Sound to Buzzards Bay and Vineyard Sound. Here, wind gusts
may approach 20 to 25 kt and could warrant a short-duration Small
Craft Advisory.

Otherwise, seas continue to subside today, ranging from 3 to 5 ft,
with the roughest seas across the outer southeastern waters. Seas
then diminish to 2 to 3 ft Tuesday, though localized 3 to 4 ft seas
are possible in the aforementioned waters with the higher gusts.

Outlook /Tuesday Night through Friday/...

Tuesday Night: Winds less than 25 kt. Seas locally 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: Moderate risk for Small Craft Advisory winds
with gusts up to 25 kt. Seas up to 5 ft. Chance of rain
showers, chance of thunderstorms.

Thursday through Thursday Night: Winds less than 25 kt. Seas up
to 5 ft. Slight chance of rain showers.

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

&&

.BOX WATCHES/WARNINGS/ADVISORIES...
CT...None.
MA...High Risk for Rip Currents through this evening for MAZ022-024.
RI...None.
MARINE...Small Craft Advisory until 10 AM EDT this morning for
     ANZ231>235-237-250-251.
     Small Craft Advisory until 4 PM EDT this afternoon for
     ANZ254>256.

&&

$$

DISCUSSION...Dooley
AVIATION...Dooley/FT
MARINE...Dooley