Update AFD Area Forecast Discussion — Wed Apr 8, 2026 7:09 AM

AFDBOX

Area Forecast Discussion
National Weather Service Boston/Norton MA
700 AM EDT Wed Apr 8 2026

.WHAT HAS CHANGED...
Updated Aviation section, otherwise no significant changes.

&&

.KEY MESSAGES...

- Sunny & cool today with highs in the upper 40s to the lower 50s
  except near 40 along parts of the immediate eastern MA coast. Cold
  tonight with clear skies/light winds & lows mainly in the 20s.

- Dry with moderating temps Thu/Fri. Highs in the 50s/near 60 Thu &
  well into the 60s on Fri.

- Pleasant April weather this weekend with highs mainly in the upper
  50s to the lower 60s. Generally dry this weekend outside a few brief
  showers possible Fri night/early Sat morning.

- Temperatures uncertain on Mon depending on speed of a warm
  front, but by Tue it will be unseasonably warm with many
  locations potentially reaching 80+. Dry weather dominates Mon
  and Tue outside a few brief showers possible.

&&

.DISCUSSION...
KEY MESSAGE 1...Sunny & cool today with highs in the upper 40s to
the lower 50s except near 40 along parts of the immediate eastern MA
coast. Cold tonight with clear skies/light winds & lows mainly in
the 20s.

A large 1035+ mb high pressure system will be centered across the
region today. This will result in sunny skies...light winds and cool
temperatures. The strong April sunshine will allow highs to reach
the upper 40s to the lower 50s. However...a weak pressure gradient
will allow sea breezes to develop along portions of the immediate
coast by afternoon. This will result in afternoon temperatures mainly
in the upper 30s and lower 40s along the eastern MA coast.

High pressure will remain in control of our weather tonight as it
slowly moves east of the region. Light/calm winds, clear skies and a
dry airmass for April standards will allow for ideal radiational
cooling tonight. Temps will drop quickly after sunset...Low temps by
daybreak Thu will be mainly in the 20s but some upper teens are
possible in the normally coldest outlying locations. The urban heat
island of Boston will be the mild spot with overnight lows in the
lower 30s.

KEY MESSAGE 2...Dry with moderating temps Thu/Fri. Highs in the
50s to near 60 Thu & well into the 60s Fri.

The upper trough over the Northeast shifts east of the region Thu
into Fri. The ensembles are in very good agreement in westerly
flow aloft and above normal height fields. The result will
be moderating temps Thu and Fri with continued dry weather. Highs on
Thu will be mainly in the 50s to perhaps near 60 in a few spots. By
Fri highs will be well into the 60s across much of the region.

KEY MESSAGE 3...Pleasant April weather this weekend with highs
mainly in the upper 50s to the lower 60s. Generally dry this
weekend outside a few brief showers possible Fri night/early
Sat morning.

A weak cold front crosses the region Fri night into early Sat
morning. Forcing and deep layer moisture is rather limited...but a
few brief showers will be possible. Otherwise...a 1035 mb high
pressure system will build in from the west for the weekend.
This will result in very pleasant April weather for the rest of the
weekend. Highs will mainly be in the upper 50s to the lower 60s with
cooler conditions at times along parts of the immediate coast with
sea breezes.

KEY MESSAGE 4...Temperatures uncertain on Mon depending on the timing
of a warm front, but by Tue it will be unseasonably warm with many
locations potentially reaching 80+. Dry weather dominates Mon and Tue
outside a few brief showers possible.

High pressure shifts east of the region early next week. The long range
ensembles indicate upper level ridging over the Gulf nosing northward
into New England with well above normal height fields. High temps on
Mon are uncertain depending on the timing of a warm frontal passage.
The GFS is quickest with highs well into the 70s...while the
CMC/ECMWF are slower indicating highs in the 50s to the lower 60s.
However...by Tue the guidance is in very good agreement in the
potential for many locations to see high temps of 80+ with
southwest flow. Still a lot can change in this time range...but
certainly the potential for summerlike warmth by next Tue afternoon.

A few showers will be possible with the warm front on Mon and
perhaps by later Tue/Tue night with shortwave energy approaching
from the west. But overall...much of this time may feature dry
weather.

&&

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

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

12z TAF Update...High confidence.

MVFR ceilings near Cape Cod will scatter out with VFR
conditions by late morning. N winds gusting to 25-30kt will
slowly diminish through early afternoon. Otherwise, VFR SKC with
light N winds giving way to coastal sea breezes later this
morning and light S winds inland. Winds become more SE Thu.

KBOS Terminal...High confidence in TAF.

KBDL Terminal...High confidence in TAF.

Outlook /Thursday Night through Sunday/...

Thursday Night through Friday: VFR. Breezy.

Friday Night: VFR. Breezy. Chance SHRA.

Saturday: VFR. Breezy.

Saturday Night through Sunday: VFR.

&&

.MARINE...
Forecaster Confidence Levels...

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

Today through Thursday...High confidence.

Lingering NW small craft wind gusts will continue to diminish
from west to east through the morning as high pressure builds
across the waters. Winds/seas should then remain below small
craft advisory thresholds through Thursday as high gradually
shifts east of the waters. That being said...things may get a
bit choppy Thu afternoon with some southerly 20+ knot gusts
developing.

Outlook /Thursday Night through Sunday/...

Thursday Night: Winds less than 25 kt.

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

Friday Night: Winds less than 25 kt. Seas up to 5 ft. Chance of
rain showers.

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

Sunday: 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 11 AM EDT this morning for ANZ231-
     232-254-255.
     Small Craft Advisory until 8 AM EDT this morning for
     ANZ233>235-250-251-256.

&&

$$