Woburn Weather Center  47.6°F

Area Forecast Discussion
National Weather Service Boston/Norton MA
727 PM EDT Wed Apr 23 2025

SYNOPSIS
Chilly tonight as a result of radiational cooling. Pleasant and dry
under high pressure continuing through Thursday, with the exception
of a slight chance of showers Thursday evening/night across northern
Massachusetts. Unseasonably warm on Friday before A system on
Saturday brings the next chance for widespread rainfall, though
exact details remain uncertainty. Drier conditions return late
this weekend into early next week.

.NEAR TERM /UNTIL 6 AM THURSDAY MORNING/...
Key Messages...

* Clear skies, light winds, and cooler temps tonight.

Zonal flow in the mid- and upper- levels continues tonight as a
surface high builds to the south. Decreasing winds and clear skies
will allow for a good amount of radiational cooling and decoupling
of the boundary layer, leading to  overnight lows in the high 30s to
low 40s outside of the typical urban corridors to cool into the
upper 30s and low 40s.

.SHORT TERM /6 AM THURSDAY MORNING THROUGH THURSDAY NIGHT/...
Short Term

Key Messages...

* Warmer, clear skies, and light winds for a pleasant Thursday.

* Chance of showers Thursday evening north of the Mass Pike.

A mid-level ridge stretching into southern Quebec together with
surface high pressure just offshore will prolong the quiet and dry
weather through Thursday. The only exception is for western and
central MA which may be in close enough proximity to a weak
shortwave and moisture plume to our north to support widely
scattered showers Thursday evening north of the Mass Pike.
Temperature-wise, we will warm a few degrees on Thursday afternoon
as warm advection in the low levels pushes 925 mb temps to 12-15C
which would result in highs in the upper 60s and mid 70s across the
interior and high 50s to mid 60s along the immediate coasts, Cape,
and Islands. Wind gusts pick up a little for Thursday night along
the south coast, Cape, and Islands as a warm front approaches
southern New England.

.LONG TERM /FRIDAY THROUGH WEDNESDAY/...
Key Messages:

* Unseasonably warm Friday

* Soaking rain Saturday, but timing remains uncertain

* Drying out Sunday with cool and blustery conditions

* Mainly dry with warming temperatures Monday through Wednesday
Unseasonably warm on Friday as flow turns SW and 850mb temps warm to
+10C. Even with partly to mostly cloudy skies due to weak WAA, high
temps will reach the mid to upper 70s to even low 80s near the CT
river valley. Closer to the coasts, highs will struggle to jump out
of the low to mid-60s with a modest southerly breeze.

A short wave trough exits the Great Lakes Saturday as a surface low
out ahead of it passes over northern New England. This system will
bring our next round of precipitation to the region as PWATs
increase to 1.3 to 1.5 inches. The timing of the rain remains
uncertain as the GFS remains faster than the Euro and Canadian.
However, the 12z run has started to trend slower, with the bulk of
the precipitation falling during the daylight hours on Saturday.
There could be a rumble or two of thunder, as steep mid-level lapse
rates allow for elevated instability to build to 100-300J/kg. As of
now, still expecting a modest rainfall as ensemble probs from the
12z GEFS and ECWMF show moderate to high probs of 40-70% for a half
inch of rain. Ensemble probs drop off significantly for greater than
1 inch, ranging between 0-10%. Thinking there will be pockets of
greater than 1 inch, but they will be more localized to pockets
where convection can help increase rain rates. It will be quite
windy on Saturday as a southerly LLJ of 45-55 knots develops over
eastern MA and RI. With cold ocean waters still in the 40s, it will
be tough to mix down much of that wind. Hence, gusts should stay in
the 25-35mph range. High temps range from the low to upper 60s.

Drying out Sunday as cool and dry air advects in from the north.
Winds turn gusty again around 30-40mph as the pressure gradient
remains tight, and northerly winds promote good mixing.  High temps
will struggle to top the low 60s even with mostly sunny skies.

Upper-level ridge builds back in to start the week with mainly dry
conditions through Wednesday.  High temperatures quickly moderate
back into the low 70s on Monday, with mid to upper 70s on Tuesday
and Wednesday.

.AVIATION /23Z WEDNESDAY THROUGH MONDAY/...
Low - less than 30 percent.
Moderate - 30 to 60 percent.
High - greater than 60 percent.

00Z TAF Update:

Tonight: High Confidence

VFR. Northerly winds 5-10kts becoming light and variable in the
early morning hours.

Thursday: High Confidence.

VFR. Winds light and variable, becoming southerly 5-10 kts in
the afternoon. Expect haze and smoke to begin moving into CT
during the afternoon which could cause some visibility
obstruction.

Thursday Night: High Confidence.

VFR. Primarily SSWly winds 5-10kts with a few sporadic gusts up
to 15kts. Smoke/haze continues to spread into the rest of SNE
with visibility obstruction possible.

KBOS TAF...High confidence...

Light northerly winds tonight. Sea breeze kicks in early
tomorrow between 12-13z. Sea breeze kicks out in the late
afternoon/evening, then winds aloft begin to increase, bringing
some light wind shear Thursday evening. Smoke/haze could cause
some visibility obstruction overnight Thursday into Friday
morning.

KBDL TAF...High confidence in TAF.

Light and variable winds tonight turning southerly tomorrow.
Smoke/haze could cause some visibility obstruction as early as
Thursday afternoon, possibly into Friday morning.

Outlook /Friday through Monday/...

Friday: VFR. Breezy.

Friday Night: Mainly VFR, with local IFR possible. Breezy.
Chance RA.

Saturday: Mainly MVFR, with local IFR possible. Windy with
gusts up to 30 kt. RA likely, slight chance TSRA.

Saturday Night: VFR. Windy with local gusts up to 30 kt. Chance
SHRA.

Sunday: VFR. Windy with gusts up to 35 kt.

Sunday Night through Monday: VFR.

.MARINE...
Forecaster Confidence Levels:

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

Key Messages

* Generally quiet conditions over the coastal marine zones through
  Thursday night.

Tonight

Quiet and calm across the coastal waters tonight with winds becoming
light south/southwest winds becoming northeast by tomorrow morning.
Seas generally 2 feet or less.

Tomorrow

High pressure to the south of the coastal waters will support
another calm day with light northeast winds in the morning becoming
steady out of the south during the afternoon from 10 to 15
knots. Seas remain 2 feet or less.

Tomorrow Night

South/southwest winds up to 10 knots with seas building to 2-3 feet.

Outlook /Friday through Monday/...

Friday: Winds less than 25 kt.

Friday Night: Winds less than 25 kt. Seas locally approaching
5 ft. Chance of rain.

Saturday: Moderate risk for Small Craft Advisory winds with
local gusts up to 30 kt. Areas of rough seas. Rain, slight
chance of thunderstorms.

Saturday Night: Low risk for Small Craft Advisory winds with
gusts up to 25 kt. Seas up to 5 ft. Chance of rain showers.

Sunday: Moderate risk for Small Craft Advisory winds with gusts
up to 30 kt. Areas of seas approaching 5 ft.

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

Monday: Winds less than 25 kt.

.BOX WATCHES/WARNINGS/ADVISORIES...
CT...None.
MA...None.
RI...None.
MARINE...None.

SYNOPSIS...McMinn/KP
NEAR TERM...McMinn/RM
SHORT TERM...McMinn/RM
LONG TERM...KP
AVIATION...McMinn/KP
MARINE...McMinn/KP/RM          

Zone Forecast Product for Southern New England
National Weather Service Boston/Norton MA
1003 PM EDT Wed Apr 23 2025

Forecast Synopsis
Chilly tonight as a result of radiational cooling. Pleasant and dry
under high pressure continuing through Thursday, with the exception
of a slight chance of showers Thursday evening/night across northern
Massachusetts. Unseasonably warm on Friday before A system on
Saturday brings the next chance for widespread rainfall, though
exact details remain uncertainty. Drier conditions return late
this weekend into early next week.

Southeast Middlesex MA-
Including the city of Cambridge
1003 PM EDT Wed Apr 23 2025

.OVERNIGHT...Mostly clear. Lows in the mid 40s. North winds
around 5 mph.
.THURSDAY...Sunny. Hazy in the afternoon. Highs in the upper 60s.
Northeast winds around 5 mph, becoming southeast in the
afternoon.
.THURSDAY NIGHT...Partly cloudy in the evening, then becoming
mostly cloudy. Hazy. Lows in the upper 40s. Southwest winds 5 to
10 mph.
.FRIDAY...Mostly sunny. Highs in the lower 70s. Southwest winds
around 5 mph, becoming east in the afternoon.
.FRIDAY NIGHT...Mostly cloudy with a 50 percent chance of rain.
Lows in the mid 50s. South winds 5 to 10 mph. Gusts up to 20 mph
after midnight.
.SATURDAY...Rain. Highs in the upper 60s. Chance of rain
80 percent.
.SATURDAY NIGHT...Rain likely. Lows in the mid 40s. Chance of
rain 70 percent.
.SUNDAY...Mostly sunny. Highs in the lower 60s.
.SUNDAY NIGHT AND MONDAY...Mostly clear. Lows in the upper 40s.
Highs in the lower 70s.
.MONDAY NIGHT AND TUESDAY...Partly cloudy. Lows around 50. Highs
in the mid 70s.
.TUESDAY NIGHT AND WEDNESDAY...Mostly cloudy. Lows around 60.
Highs around 80.          

REGIONAL WEATHER ROUNDUP
NATIONAL WEATHER SERVICE BOSTON/NORTON MA
1100 PM EDT WED APR 23 2025

NOTE:  "FAIR" INDICATES FEW OR NO CLOUDS BELOW 12,000 FEET WITH NO
SIGNIFICANT WEATHER AND/OR OBSTRUCTIONS TO VISIBILITY.

MAZALL-240400-
EASTERN MASSACHUSETTS

CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
BOSTON         CLEAR     50  44  80 E3        30.21S
BEVERLY        PTCLDY    48  42  80 CALM      30.20R
LAWRENCE       PTCLDY    53  32  44 CALM      30.22S
BEDFORD        CLEAR     53  34  48 W3        30.19S
NORWOOD        CLEAR     52  39  61 CALM      30.20S
MARSHFIELD     CLEAR     46  41  81 W5        30.20S
PLYMOUTH       CLEAR     47  39  74 CALM      30.20S
TAUNTON        CLEAR     43  40  89 CALM      30.21S
NEW BEDFORD    CLEAR     48  42  80 CALM      30.21S


MAZALL-240400-
CAPE COD AND THE ISLANDS

CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
FALMOUTH       CLEAR     46  41  81 W5        30.22F
HYANNIS        CLEAR     44  39  82 CALM      30.19S
CHATHAM        CLEAR     50  42  74 SW3       30.21S
PROVINCETOWN   CLEAR     48  42  80 S5        30.21F
NANTUCKET      CLEAR     45  42  89 SW5       30.22S
MARTHAS VNYRD  CLEAR     49  40  71 CALM      30.21S


MAZALL-240400-
CENTRAL AND WESTERN MASSACHUSETTS

CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
WORCESTER      CLEAR     55  32  41 W7        30.22S
FITCHBURG      PTCLDY    52  36  54 NW3       30.22R
ORANGE         CLEAR     49  39  68 CALM      30.23R
SPRINGFIELD    PTCLDY    57  38  48 SE6       30.19S
WESTFIELD      CLEAR     56  40  55 CALM      30.22R
NORTH ADAMS    CLEAR     48  37  65 E3        30.23S
PITTSFIELD     CLEAR     54  35  48 CALM      30.23S


RIZALL-240400-
RHODE ISLAND

CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
PROVIDENCE     PTCLDY    61  34  36 CALM      30.21S
NEWPORT        CLEAR     53  39  59 CALM      30.21S
BLOCK ISLAND   CLEAR     51  40  65 W8        30.23S
SMITHFIELD     CLEAR     52  34  50 CALM      30.22S
WESTERLY       CLEAR     52  42  69 SW3       30.23S


CTZALL-240400-
CONNECTICUT

CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
BRADLEY INTL   PTCLDY    62  37  39 CALM      30.22S
HARTFORD       CLEAR     60  39  45 CALM      30.21S
PLAINVILLE     CLEAR     56  41  56 CALM      30.22S
BRIDGEPORT     CLEAR     53  43  68 CALM      30.22F
DANBURY        CLEAR     52  40  63 CALM      30.23S
GROTON         CLEAR     48  45  89 CALM        N/A
NEW HAVEN      CLEAR     58  44  60 CALM      30.22F
CHESTER        CLEAR     59  39  47 SW5       30.23S
MERIDEN        CLEAR     57  44  62 CALM      30.22S
WILLIMANTIC    CLEAR     55  40  56 CALM      30.22F
OXFORD         CLEAR     57  38  48 CALM      30.24S


MEZ002-015-021-024-NHZ003-005-008-011-012-014-VTZ005-008-240400-
NORTHERN NEW ENGLAND

CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
PORTLAND ME    CLEAR     49  40  71 NE7       30.23R
BANGOR ME      CLEAR     42  30  62 W5        30.22S
CONCORD NH     CLEAR     49  33  54 NE6       30.23R
MANCHESTER NH  PTCLDY    53  35  50 CALM      30.20R
NASHUA NH      PTCLDY    50  37  61 NW5       30.22R
PORTSMOUTH NH  PTCLDY    53  31  42 CALM      30.20R
JAFFREY NH     PTCLDY    44  38  79 CALM      30.23R
KEENE NH       CLEAR     46  39  76 CALM      30.22R
BURLINGTON VT  CLEAR     50  34  54 E5        30.25F
MT. WASHINGTON NOT AVBL


NYZ052-076-240400-
EASTERN NEW YORK

CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
ALBANY         PTCLDY    55  37  50 NW5       30.23S
NEW YORK CITY  PTCLDY    60  38  43 S3        30.22S


ANZALL-240400-
MARINE OBSERVATIONS

STATION/POSITION TIME  TEMP    WIND        PRES    VSBY  WAVE
                       AIR SEA DIR/SP/G                  HT/PER
                 (UTC) (F)     (DEG/KT/KT) (MB)    (MI)  (FT/S)
BOSTON BUOY      0250   50 46  210/  2/  4 1022.8R         1/ 7
BUZZARDS BAY     0200          260/ 10/ 11 1023.7R
NANTUCKET SOUND  0240   51 49  260/  6/  8 1022.2F
MASS BAY-STELLWA 0104   48     170/  2/  4 1021.3R  1 7/8  2/ 5
ISLE OF SHOALS   0200   54     190/  6/  7 1022.2R
S OF BLOCK IS    0256      47                N/A           3/ 8


......................KEY.........................
  SKY/WX - SKY CONDITION/PRESENT WEATHER
  TMP    - TEMPERATURE IN FAHRENHEIT
  DWPT   - DEWPOINT IN FAHRENHEIT
  RH     - RELATIVE HUMIDITY IN PERCENT
  WIND   - DIRECTION AND SPEED IN MPH
  PRES   - MEAN SEA LEVEL PRESSURE IN INCHES OF HG
  WCI    - WIND CHILL INDEX
  VSB    - VISIBILITY IN MILES
  HX     - HEAT INDEX
  TC     - TEMPERATURE IN CELSIUS
  VRB    - VARIABLE WIND DIRECTION
  N/A    - NOT AVAILABLE          

Max/Min Temperature and Precipitation Table for
Most of Southern New England
National Weather Service Boston/Norton MA
820 PM EDT Wed Apr 23 2025

This is an automated product. These data are preliminary and have
not undergone final quality control by the National Centers for
Environmental Information (NCEI). Therefore, these data are subject
to revision. Final and certified climate data can be accessed at
www.ncei.noaa.gov.

Values represent lows over the last 18 hours, highs over the last
18 hours and precipitation over the last 24 hours.

.BR BOX  0423 ES DH19/TAIRZS/TAIRZI/PPDRZZ

                           Max        Min         24-Hour
ID         Location        Temp       Temp     Precipitation

Eastern Massachusetts...
 BED        Bedford        72    /    40    /    0.00
 BVY        Beverly        71    /    40    /    0.00
 BOS        Boston         73    /    44    /    0.00
 LWM       Lawrence        70    /    38    /    0.00
 EWB      New Bedford      69    /    46    /    0.00
 OWD        Norwood        75    /    45    /    0.00
 PYM       Plymouth        71    /    43    /    0.00
 GHG      Marshfield       61    /    43    /

Cape Cod and the Islands...
 CQX        Chatham        64    /    45    /    0.00
 HYA        Hyannis        61    /    42    /    0.00
 MVY   Marthas Vineyard    63    /    42    /    0.00
 ACK       Nantucket       61    /    43    /    0.00
 FMH       Falmouth        64    /    43    /
 PVC     Provincetown      63    /    42    /

Central and Western Massachusetts...
 FIT       Fitchburg       74    /    41    /    0.00
 ORE        Orange         70    /    39    /    0.00
 CEF      Springfield      71    /    46    /    0.00
 BAF       Westfield       73    /    47    /    0.00
 ORH       Worcester       68    /    45    /    0.00

Rhode Island...
 BID     Block Island      62    /    49    /
 SFZ      Smithfield       73    /    48    /
 UUU        Newport        67    /    52    /    0.00
 PVD      Providence       70    /    52    /    0.00
 WST       Westerly        67    /    51    /    0.00

Northern Connecticut...
 BDL   Hartford-Bradley    73    /    49    /    0.00
 HFD       Hartford        73    /    52    /    0.00
 IJD      Willimantic      73    /    47    /    0.00