Alert archive / Massachusetts / Flash Flood Watches in 2017

Flash Flood Watch 8, NWS Boston/Norton, MA

October 23, 201713 counties in Massachusetts; 5 counties in Rhode Island; Capitol Planning Region, Northeastern Connecticut Planning Region, Connecticut

NWS Boston/Norton, MA issued this flash flood watch at Oct 23, 2017, 4:01 PM EDT for 13 counties in Massachusetts; 5 counties in Rhode Island; Capitol Planning Region, Northeastern Connecticut Planning Region, Connecticut. It took effect at Oct 24, 2017, 6:00 PM EDT. It was in force for 26 hr.

The area

The counties it named.

The facts

Issued
Oct 23, 2017, 4:01 PM EDT (20:01 UTC)
In effect from
Oct 24, 2017, 6:00 PM EDT
Expired
Oct 25, 2017, 8:00 PM EDT
In force
26 hr
Issued by
NWS Boston/Norton, MA
Flood severity
None

Counties Capitol Planning Region, CT, Northeastern Connecticut Planning Region, CT, Barnstable County, MA, Bristol County, MA, Dukes County, MA, Essex County, MA, Franklin County, MA, Hampden County, MA, Hampshire County, MA, Middlesex County, MA, Nantucket County, MA, Norfolk County, MA, Plymouth County, MA, Suffolk County, MA, Worcester County, MA, Bristol County, RI, Kent County, RI, Newport County, RI, Providence County, RI, Washington County, RI

The radar

The Boston radar (KBOX), 26 km from the middle of the area, began a volume at 20:04 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Chatham, MA (KCHH), launched 12:00Z, 8.0 hours before the alert went out and 127 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Chatham, MA at 12:00Z on 2017-10-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Chatham, MA at 12:00Z on 2017-10-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -16 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1179 m above ground
0-6 km bulk shear
11 kt
0-1 km storm-relative helicity
-16 m²/s²
0-3 km storm-relative helicity
21 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

536 
WGUS61 KBOX 232001
FFABOX

URGENT - IMMEDIATE BROADCAST REQUESTED
Flood Watch
National Weather Service Taunton MA
401 PM EDT Mon Oct 23 2017

CTZ002-MAZ002-003-008>011-240415-
/O.NEW.KBOX.FF.A.0008.171024T2200Z-171025T1400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Hartford CT-Western Franklin MA-Eastern Franklin MA-
Western Hampshire MA-Western Hampden MA-Eastern Hampshire MA-
Eastern Hampden MA-
Including the cities of Hartford, Windsor Locks, Charlemont, 
Greenfield, Orange, Chesterfield, Blandford, Amherst, 
Northampton, and Springfield
401 PM EDT Mon Oct 23 2017

...FLASH FLOOD WATCH IN EFFECT FROM TUESDAY EVENING THROUGH
WEDNESDAY MORNING...

The National Weather Service in Taunton has issued a

* Flash Flood Watch for the east slopes of the Berkshires and
  Litchfield hills as well as the Connecticut river valley.

* From Tuesday evening through Wednesday morning

* Periods of moderate to heavy rain with the potential for
  embedded thunderstorms will move over western Massachusetts and
  Connecticut late tomorrow into tomorrow night. High rainfall 
  rates, combined with a prolonged period of moderate to heavy 
  rain could lead to localized flash flooding at some of the 
  faster responding streams and rivers. Some localized urban 
  flooding is also possible.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flash Flood Watch means that conditions may develop that lead
to flash flooding. Flash flooding is a very dangerous situation.

You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.

&&

$$
11 follow-up statements
127 
WGUS61 KBOX 240203
FFABOX

Flood Watch
National Weather Service Taunton MA
1003 PM EDT Mon Oct 23 2017

CTZ002-MAZ002-003-008>011-241015-
/O.CON.KBOX.FF.A.0008.171024T2200Z-171025T1400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Hartford CT-Western Franklin MA-Eastern Franklin MA-
Western Hampshire MA-Western Hampden MA-Eastern Hampshire MA-
Eastern Hampden MA-
Including the cities of Hartford, Windsor Locks, Charlemont, 
Greenfield, Orange, Chesterfield, Blandford, Amherst, 
Northampton, and Springfield
1003 PM EDT Mon Oct 23 2017

...FLASH FLOOD WATCH REMAINS FROM TUESDAY EVENING THROUGH 
WEDNESDAY MORNING...

The Flash Flood Watch continues for

* Franklin, Hampden, and Hampshire Counties in Western Massachusetts,
  as well as Hartford County in Northern Connecticut 

* From Tuesday evening through Wednesday morning.

* Moderate to heavy rain will impact Western Massachusetts and
  Western Connecticut late Tuesday into Tuesday night. Excessive 
  rainfall, especially with any thunderstorms, could lead to 
  localized flash flooding at some of the faster responding 
  streams and rivers in the region. Localized urban flooding is 
  also possible. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flash Flood Watch means that conditions may develop that lead
to flash flooding. Flash flooding is a very dangerous situation.

You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.

&&

$$
411 
WGUS61 KBOX 240743
FFABOX

Flood Watch
National Weather Service Taunton MA
343 AM EDT Tue Oct 24 2017

CTZ002-MAZ002-003-008>011-241545-
/O.CON.KBOX.FF.A.0008.171024T2200Z-171025T1400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Hartford CT-Western Franklin MA-Eastern Franklin MA-
Western Hampshire MA-Western Hampden MA-Eastern Hampshire MA-
Eastern Hampden MA-
Including the cities of Hartford, Windsor Locks, Charlemont, 
Greenfield, Orange, Chesterfield, Blandford, Amherst, 
Northampton, and Springfield
343 AM EDT Tue Oct 24 2017

...FLASH FLOOD WATCH FROM THIS EVENING THROUGH WEDNESDAY MORNING...

The Flash Flood Watch continues for

* Franklin, Hampden, and Hampshire Counties in Western 
  Massachusetts, as well as Hartford County in Northern 
  Connecticut 

* From this evening through Wednesday morning.

* Moderate to heavy rain will impact Western Massachusetts and
  Western Connecticut through tonight with the heaviest expected
  this afternoon into evening. 

* Excessive rainfall, especially with any thunderstorms, could
  lead to localized flash flooding at some of the faster
  responding streams and rivers in the region. Localized urban
  flooding is also possible. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flash Flood Watch means that conditions may develop that lead
to flash flooding. Flash flooding is a very dangerous situation.

You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.

&&

$$
426 
WGUS61 KBOX 241436
FFABOX

Flood Watch
National Weather Service Taunton MA
1036 AM EDT Tue Oct 24 2017

CTZ002-MAZ002-003-008>011-242245-
/O.CON.KBOX.FF.A.0008.171024T2200Z-171025T1400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Hartford CT-Western Franklin MA-Eastern Franklin MA-
Western Hampshire MA-Western Hampden MA-Eastern Hampshire MA-
Eastern Hampden MA-
Including the cities of Hartford, Windsor Locks, Charlemont, 
Greenfield, Orange, Chesterfield, Blandford, Amherst, 
Northampton, and Springfield
1036 AM EDT Tue Oct 24 2017

...FLASH FLOOD WATCH REMAINS IN EFFECT FROM 6 PM EDT THIS EVENING
THROUGH WEDNESDAY MORNING...

The Flash Flood Watch continues for

* Franklin, Hampshire and Hampden counties in western
  Massachusetts, as well as Hartford county in northern
  Connecticut.

* From this evening through Wednesday morning.

* Moderate to heavy rain will impact western Massachusetts and western
  Connecticut through tonight with the heaviest expected this 
  afternoon into evening. 

* Excessive rainfall, especially with any thunderstorms, could 
  lead to localized flash flooding at some of the faster 
  responding streams and rivers in the region. Localized urban 
  flooding is also possible. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flash Flood Watch means that conditions may develop that lead
to flash flooding. Flash flooding is a very dangerous situation.

You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.

&&

$$
217 
WGUS61 KBOX 241605
FFABOX

URGENT - IMMEDIATE BROADCAST REQUESTED
Flood Watch
National Weather Service Taunton MA
1205 PM EDT Tue Oct 24 2017

CTZ003-004-MAZ004-012-250015-
/O.EXA.KBOX.FF.A.0008.171024T2200Z-171025T1400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Tolland CT-Windham CT-Northern Worcester MA-Southern Worcester MA-
Including the cities of Union, Vernon, Putnam, Willimantic, 
Barre, Fitchburg, Milford, and Worcester
1205 PM EDT Tue Oct 24 2017

...FLASH FLOOD WATCH IN EFFECT FROM 6 PM EDT THIS EVENING THROUGH
WEDNESDAY MORNING...

The National Weather Service in Taunton has expanded the

* Worcester county in central Massachusetts as well as Tolland and
  Windham counties in northern Connecticut. 

* From this evening through Wednesday morning.

* Moderate to heavy rain will impact central Massachusetts into
  northeastern Connecticut through tonight, with the heaviest 
  from this evening through early Wednesday morning. 

* Excessive rainfall, especially with any thunderstorms, could 
  lead to localized flash flooding at some of the faster 
  responding streams and rivers in the region. Localized urban 
  flooding is also possible. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flash Flood Watch means that conditions may develop that lead
to flash flooding. Flash flooding is a very dangerous situation.

You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.

&&

$$

CTZ002-MAZ002-003-008>011-250015-
/O.CON.KBOX.FF.A.0008.171024T2200Z-171025T1400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Hartford CT-Western Franklin MA-Eastern Franklin MA-
Western Hampshire MA-Western Hampden MA-Eastern Hampshire MA-
Eastern Hampden MA-
Including the cities of Hartford, Windsor Locks, Charlemont, 
Greenfield, Orange, Chesterfield, Blandford, Amherst, 
Northampton, and Springfield
1205 PM EDT Tue Oct 24 2017

...FLASH FLOOD WATCH REMAINS IN EFFECT FROM 6 PM EDT THIS EVENING
THROUGH WEDNESDAY MORNING...

The Flash Flood Watch continues for

* Franklin, Hampshire and Hampden counties in western
  Massachusetts, as well as Hartford county in north central
  Connecticut. 

* From this evening through Wednesday morning.

* Moderate to heavy rain will impact western Massachusetts and
  western Connecticut through tonight with the heaviest expected
  this evening into early Wednesday morning. 

* Excessive rainfall, especially with any thunderstorms, could 
  lead to localized flash flooding at some of the faster 
  responding streams and rivers in the region. Localized urban 
  flooding is also possible. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flash Flood Watch means that conditions may develop that lead
to flash flooding. Flash flooding is a very dangerous situation.

You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.

&&

$$
657 
WGUS61 KBOX 241953
FFABOX

URGENT - IMMEDIATE BROADCAST REQUESTED
Flood Watch
National Weather Service Taunton MA
353 PM EDT Tue Oct 24 2017

MAZ005>007-013>024-026-RIZ001>008-250400-
/O.EXB.KBOX.FF.A.0008.171025T0600Z-171025T2200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Central Middlesex MA-Western Essex MA-Eastern Essex MA-
Western Norfolk MA-Southeast Middlesex MA-Suffolk MA-
Eastern Norfolk MA-Northern Bristol MA-Western Plymouth MA-
Eastern Plymouth MA-Southern Bristol MA-Southern Plymouth MA-
Barnstable MA-Dukes MA-Nantucket MA-Northern Middlesex MA-
Northwest Providence RI-Southeast Providence RI-Western Kent RI-
Eastern Kent RI-Bristol RI-Washington RI-Newport RI-
Block Island RI-
Including the cities of Framingham, Lowell, Lawrence, Gloucester,
Foxborough, Norwood, Cambridge, Boston, Quincy, Taunton, 
Brockton, Plymouth, Fall River, New Bedford, Mattapoisett, 
Chatham, Falmouth, Provincetown, Vineyard Haven, Nantucket, Ayer,
Foster, Smithfield, Providence, Coventry, West Greenwich, 
East Greenwich, Warwick, West Warwick, Bristol, Narragansett, 
Westerly, Newport, and New Shoreham
353 PM EDT Tue Oct 24 2017

...FLASH FLOOD WATCH IN EFFECT FROM 2 AM EDT WEDNESDAY THROUGH
WEDNESDAY AFTERNOON...

The National Weather Service in Taunton has expanded the

* Flash Flood Watch to include eastern Massachusetts and all of
  Rhode Island, including Barnstable, Bristol, Dukes, Essex,
  Middlesex, Nantucket, Norfolk, Plymouth, and Suffolk counties in
  Massachusetts as well as Block Island, Bristol, Kent, Newport, 
  Providence, and Washington counties in Rhode Island. 

* From early Wednesday through Wednesday afternoon.

* Moderate to heavy rain will impact eastern Massachusetts and
  Rhode Island beginning early Wednesday morning, with the
  heaviest rainfall expected from early Wednesday morning through
  Wednesday afternoon. 

* Excessive rainfall, especially with any thunderstorms, could 
  lead to localized flash flooding at some of the faster 
  responding streams and rivers in the region. Localized urban 
  flooding is also possible. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flash Flood Watch means that conditions may develop that lead
to flash flooding. Flash flooding is a very dangerous situation.

You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.

&&

$$

CTZ002>004-MAZ002>004-008>012-250400-
/O.CON.KBOX.FF.A.0008.171024T2200Z-171025T1400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Hartford CT-Tolland CT-Windham CT-Western Franklin MA-
Eastern Franklin MA-Northern Worcester MA-Western Hampshire MA-
Western Hampden MA-Eastern Hampshire MA-Eastern Hampden MA-
Southern Worcester MA-
Including the cities of Hartford, Windsor Locks, Union, Vernon, 
Putnam, Willimantic, Charlemont, Greenfield, Orange, Barre, 
Fitchburg, Chesterfield, Blandford, Amherst, Northampton, 
Springfield, Milford, and Worcester
353 PM EDT Tue Oct 24 2017

...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH WEDNESDAY
MORNING...

The Flash Flood Watch continues for

* Franklin, Hampden, Hampshire and Worcester counties in
  Massachusetts as well as Hartford, Tolland and Windham counties
  in northern Connecticut.

* Through Wednesday morning.

* Moderate to heavy rain will impact western and central  
  Massachusetts and most of northern Connecticut, with the 
  heaviest expected this evening into early Wednesday morning. 

* Excessive rainfall, especially with any thunderstorms, could 
  lead to localized flash flooding at some of the faster 
  responding streams and rivers in the region. Localized urban 
  flooding is also possible. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flash Flood Watch means that conditions may develop that lead
to flash flooding. Flash flooding is a very dangerous situation.

You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.

&&

$$
257 
WGUS61 KBOX 250232
FFABOX

Flood Watch
National Weather Service Taunton MA
1032 PM EDT Tue Oct 24 2017

...Potentially Dangerous and Life Threatening Flash Flood Event...

.A solid south to north line of widespread rain with embedded 
heavier showers and thunderstorms will slowly sweep east across 
Southern New England overnight. Already reports of 1 to 3 inches 
within roughly an hour has resulted in flash flood warnings across
the Connecticut River Valley. Expecting this threat to move into 
the Boston to Providence corridor towards Wednesday morning. Given
such excessive rainfall in urban corridors in a short period of 
time, this is a potentially dangerous and life threatening 
situation. 

MAZ005>007-013>024-026-RIZ001>008-251045-
/O.CON.KBOX.FF.A.0008.171025T0600Z-171025T2200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Central Middlesex MA-Western Essex MA-Eastern Essex MA-
Western Norfolk MA-Southeast Middlesex MA-Suffolk MA-
Eastern Norfolk MA-Northern Bristol MA-Western Plymouth MA-
Eastern Plymouth MA-Southern Bristol MA-Southern Plymouth MA-
Barnstable MA-Dukes MA-Nantucket MA-Northern Middlesex MA-
Northwest Providence RI-Southeast Providence RI-Western Kent RI-
Eastern Kent RI-Bristol RI-Washington RI-Newport RI-
Block Island RI-
Including the cities of Framingham, Lowell, Lawrence, Gloucester,
Foxborough, Norwood, Cambridge, Boston, Quincy, Taunton, 
Brockton, Plymouth, Fall River, New Bedford, Mattapoisett, 
Chatham, Falmouth, Provincetown, Vineyard Haven, Nantucket, Ayer,
Foster, Smithfield, Providence, Coventry, West Greenwich, 
East Greenwich, Warwick, West Warwick, Bristol, Narragansett, 
Westerly, Newport, and New Shoreham
1032 PM EDT Tue Oct 24 2017

...FLASH FLOOD WATCH FROM 2 AM EDT WEDNESDAY THROUGH WEDNESDAY 
AFTERNOON...

The Flash Flood Watch continues for

* Eastern and Southeastern Massachusetts as well as all of Rhode
  Island

* From 2 am Wednesday through Wednesday afternoon.

* Moderate to heavy rain will impact the region beginning early
  Wednesday morning continuing through Wednesday afternoon. 

* Excessive rainfall, especially with any thunderstorms, could
  lead to flash flooding at some of the faster responding streams
  and rivers in the region as well as in urban centers.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flash Flood Watch means that conditions may develop that lead
to flash flooding. Flash flooding is a very dangerous situation.

You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.

&&

$$

CTZ002>004-MAZ002>004-008>012-251045-
/O.CON.KBOX.FF.A.0008.000000T0000Z-171025T1400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Hartford CT-Tolland CT-Windham CT-Western Franklin MA-
Eastern Franklin MA-Northern Worcester MA-Western Hampshire MA-
Western Hampden MA-Eastern Hampshire MA-Eastern Hampden MA-
Southern Worcester MA-
Including the cities of Hartford, Windsor Locks, Union, Vernon, 
Putnam, Willimantic, Charlemont, Greenfield, Orange, Barre, 
Fitchburg, Chesterfield, Blandford, Amherst, Northampton, 
Springfield, Milford, and Worcester
1032 PM EDT Tue Oct 24 2017

...FLASH FLOOD WATCH UNTIL 10 AM EDT WEDNESDAY...

The Flash Flood Watch continues for

* Western and Central Massachusetts as well as Northern
  Connecticut

* Until 10 am Wednesday.

* Moderate to heavy rain is presently ongoing and will continue
  through early Wednesday morning. 

* Rainfall rates of 1 to 3 inches in an hour have been observed 
  and flash flood warnings are currently in effect for the 
  Connecticut River Valley.

* Additional rainfall will contribute to flash flooding at some 
  of the faster responding streams and rivers in the region as 
  well as in urban centers.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flash Flood Watch means that conditions may develop that lead
to flash flooding. Flash flooding is a very dangerous situation.

You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.

&&

$$

Sipprell
274 
WGUS61 KBOX 250738
FFABOX

URGENT - IMMEDIATE BROADCAST REQUESTED
Flood Watch
National Weather Service Taunton MA
338 AM EDT Wed Oct 25 2017

...Threat of Flash Flooding Continues...

.Widespread rain with embedded heavier showers and thunderstorms
continues to slowly sweep east producing rainfall rates of around
an inch per hour, upwards of 2 inches per hour, over thickly 
settled urban areas. Smaller streams and tributaries slightly
slower to respond, the FLASH FLOOD WATCH continues for all of
Southern New England except areas west of the Berkshires despite
the heavier rain having moved east. 

CTZ004-MAZ004>007-012>016-026-RIZ001>004-006-008-251545-
/O.EXT.KBOX.FF.A.0008.000000T0000Z-171025T1600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Windham CT-Northern Worcester MA-Central Middlesex MA-
Western Essex MA-Eastern Essex MA-Southern Worcester MA-
Western Norfolk MA-Southeast Middlesex MA-Suffolk MA-
Eastern Norfolk MA-Northern Middlesex MA-Northwest Providence RI-
Southeast Providence RI-Western Kent RI-Eastern Kent RI-
Washington RI-Block Island RI-
Including the cities of Putnam, Willimantic, Barre, Fitchburg, 
Framingham, Lowell, Lawrence, Gloucester, Milford, Worcester, 
Foxborough, Norwood, Cambridge, Boston, Quincy, Ayer, Foster, 
Smithfield, Providence, Coventry, West Greenwich, East Greenwich,
Warwick, West Warwick, Narragansett, Westerly, and New Shoreham
338 AM EDT Wed Oct 25 2017

...FLASH FLOOD WATCH UNTIL NOON EDT TODAY...

The Flash Flood Watch is in effect for

* Windham County in Connecticut. Essex, Middlesex, Norfolk,
  Suffolk, and Worcester Counties in Massachusetts. Block Island,
  Kent, Providence, and Washington Counties in Rhode Island 

* Until noon today.

* Moderate to heavy rain is presently ongoing producing rainfall
  rates of 1 up to 2 inches per hour. Anticipate impacts through
  the morning commute continuing through early afternoon.

* Excessive rainfall, especially with any thunderstorms, could 
  lead to flash flooding at some of the faster responding 
  streams and rivers in the region as well as in urban centers. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flash Flood Watch means that conditions may develop that lead
to flash flooding. Flash flooding is a very dangerous situation.

You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.

&&

$$

MAZ017>021-RIZ005-007-251545-
/O.EXT.KBOX.FF.A.0008.000000T0000Z-171025T2000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Northern Bristol MA-Western Plymouth MA-Eastern Plymouth MA-
Southern Bristol MA-Southern Plymouth MA-Bristol RI-Newport RI-
Including the cities of Taunton, Brockton, Plymouth, Fall River, 
New Bedford, Mattapoisett, Bristol, and Newport
338 AM EDT Wed Oct 25 2017

...FLASH FLOOD WATCH THROUGH THIS AFTERNOON...

The Flash Flood Watch is in effect for

* Bristol and Plymouth Counties in Massachusetts. Bristol and
  Newport Counties in Rhode Island 
 
* Through this afternoon.

* Moderate to heavy rain is presently ongoing producing rainfall
  rates of 1 up to 2 inches per hour. Anticipate impacts through
  the morning commute continuing through early afternoon.

* Excessive rainfall, especially with any thunderstorms, could 
  lead to flash flooding at some of the faster responding 
  streams and rivers in the region as well as in urban centers. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flash Flood Watch means that conditions may develop that lead
to flash flooding. Flash flooding is a very dangerous situation.

You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.

&&

$$

CTZ002-003-MAZ002-003-008>011-251000-
/O.EXT.KBOX.FF.A.0008.000000T0000Z-171025T1000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Hartford CT-Tolland CT-Western Franklin MA-Eastern Franklin MA-
Western Hampshire MA-Western Hampden MA-Eastern Hampshire MA-
Eastern Hampden MA-
Including the cities of Hartford, Windsor Locks, Union, Vernon, 
Charlemont, Greenfield, Orange, Chesterfield, Blandford, Amherst,
Northampton, and Springfield
338 AM EDT Wed Oct 25 2017

...FLASH FLOOD WATCH UNTIL 6 AM EDT EARLY THIS MORNING...

The Flash Flood Watch is in effect for

* Hartford and Tolland Counties in Connecticut. Franklin, Hampden,
  and Hampshire Counties in Massachusetts

* Until 6 AM EDT early this morning.

* While heavy rain has concluded across the region, light to
  moderate rain continues for the next couple of hours. The region
  inundated with 1 to 3 inches overnight, smaller streams and
  tributaries have been slower to respond and are now rising to
  flood stage at this time. Subsequently the flash flood watch
  continues. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flash Flood Watch means that conditions may develop that lead
to flash flooding. Flash flooding is a very dangerous situation.

You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.

&&

$$

MAZ022>024-251545-
/O.EXT.KBOX.FF.A.0008.000000T0000Z-171026T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Barnstable MA-Dukes MA-Nantucket MA-
Including the cities of Chatham, Falmouth, Provincetown, 
Vineyard Haven, and Nantucket
338 AM EDT Wed Oct 25 2017

...FLASH FLOOD WATCH THROUGH THIS EVENING...

The Flash Flood Watch is in effect for

* Barnstable, Dukes, and Nantucket Counties in Massachusetts

* Through this evening.

* Moderate to heavy rain will impact the region into this
  afternoon and into the evening hours.  

* Excessive rainfall, especially with any thunderstorms, could 
  lead to flash flooding at some of the faster responding 
  streams and rivers in the region as well as in urban centers. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flash Flood Watch means that conditions may develop that lead
to flash flooding. Flash flooding is a very dangerous situation.

You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.

&&

$$
806 
WGUS61 KBOX 250826
FFABOX

Flood Watch
National Weather Service Taunton MA
426 AM EDT Wed Oct 25 2017

...Threat of Flash Flooding Continues...

.Widespread rain with embedded heavier showers and thunderstorms
continues to slowly sweep east producing rainfall rates of around
an inch per hour, upwards of 2 inches per hour, over thickly
settled urban areas. Smaller streams and tributaries slightly
slower to respond, the FLASH FLOOD WATCH continues for all of
Southern New England except areas west of the Berkshires despite
the heavier rain having moved east.

CTZ002-003-MAZ002-003-008>011-250930-
/O.CAN.KBOX.FF.A.0008.000000T0000Z-171025T1000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Hartford CT-Tolland CT-Western Franklin MA-Eastern Franklin MA-
Western Hampshire MA-Western Hampden MA-Eastern Hampshire MA-
Eastern Hampden MA-
Including the cities of Hartford, Windsor Locks, Union, Vernon, 
Charlemont, Greenfield, Orange, Chesterfield, Blandford, Amherst,
Northampton, and Springfield
426 AM EDT Wed Oct 25 2017

...FLASH FLOOD WATCH IS CANCELLED...

The Flash Flood Watch for portions of northern Connecticut and
western Massachusetts has been cancelled. Small streams and
tributaries have mostly crested and are expected to remain below 
flood stage. 

$$

CTZ004-MAZ004-012-026-250930-
/O.CAN.KBOX.FF.A.0008.000000T0000Z-171025T1600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Windham CT-Northern Worcester MA-Southern Worcester MA-
Northern Middlesex MA-
Including the cities of Putnam, Willimantic, Barre, Fitchburg, 
Milford, Worcester, and Ayer
426 AM EDT Wed Oct 25 2017

...FLASH FLOOD WATCH IS CANCELLED...

The Flash Flood Watch for portions of northern Connecticut and
Massachusetts has been cancelled. Small streams and tributaries 
have mostly crested and are expected to remain below flood stage. 

$$

MAZ005>007-013>016-RIZ001>004-006-008-251600-
/O.CON.KBOX.FF.A.0008.000000T0000Z-171025T1600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Central Middlesex MA-Western Essex MA-Eastern Essex MA-
Western Norfolk MA-Southeast Middlesex MA-Suffolk MA-
Eastern Norfolk MA-Northwest Providence RI-
Southeast Providence RI-Western Kent RI-Eastern Kent RI-
Washington RI-Block Island RI-
Including the cities of Framingham, Lowell, Lawrence, Gloucester,
Foxborough, Norwood, Cambridge, Boston, Quincy, Foster, 
Smithfield, Providence, Coventry, West Greenwich, East Greenwich,
Warwick, West Warwick, Narragansett, Westerly, and New Shoreham
426 AM EDT Wed Oct 25 2017

...FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL NOON EDT TODAY...

The Flash Flood Watch continues for

* Central and Southeast Middlesex, Essex, Norfolk, and Suffolk
  Counties in Massachusetts. Block Island, Kent, Providence, and
  Washington Counties in Rhode Island
 
* Until noon today. 

* Moderate to heavy rain is presently ongoing producing rainfall
  rates of 1 up to 2 inches per hour. Anticipate impacts through
  the morning commute continuing through the morning. 

* Excessive rainfall, especially with any thunderstorms, could 
  lead to flash flooding at some of the faster responding 
  streams and rivers in the region as well as in urban centers. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flash Flood Watch means that conditions may develop that lead
to flash flooding. Flash flooding is a very dangerous situation.

You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.

&&

$$

MAZ017>021-RIZ005-007-251630-
/O.CON.KBOX.FF.A.0008.000000T0000Z-171025T2000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Northern Bristol MA-Western Plymouth MA-Eastern Plymouth MA-
Southern Bristol MA-Southern Plymouth MA-Bristol RI-Newport RI-
Including the cities of Taunton, Brockton, Plymouth, Fall River, 
New Bedford, Mattapoisett, Bristol, and Newport
426 AM EDT Wed Oct 25 2017

...FLASH FLOOD WATCH UNTIL 4 PM EDT THIS AFTERNOON...

The Flash Flood Watch continues for

* Bristol and Plymouth Counties in Massachusetts. Bristol and
  Newport Counties in Rhode Island
 
* Until 4 PM this afternoon.

* Moderate to heavy rain is presently ongoing producing rainfall 
  rates of 1 up to 2 inches per hour. Anticipate impacts through 
  the morning commute continuing through early afternoon. 

* Excessive rainfall, especially with any thunderstorms, could 
  lead to flash flooding at some of the faster responding 
  streams and rivers in the region as well as in urban centers. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flash Flood Watch means that conditions may develop that lead
to flash flooding. Flash flooding is a very dangerous situation.

You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.

&&

$$

MAZ022>024-251630-
/O.CON.KBOX.FF.A.0008.000000T0000Z-171026T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Barnstable MA-Dukes MA-Nantucket MA-
Including the cities of Chatham, Falmouth, Provincetown, 
Vineyard Haven, and Nantucket
426 AM EDT Wed Oct 25 2017

...FLASH FLOOD WATCH THROUGH THIS EVENING...

The Flash Flood Watch continues for

* Barnstable, Dukes, and Nantucket Counties in Massachusetts

* Through this evening.

* Moderate to heavy rain will impact the region this morning and
  continue into the evening hours. 

* Excessive rainfall, especially with any thunderstorms, could 
  lead to flash flooding at some of the faster responding 
  streams and rivers in the region as well as in urban centers. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flash Flood Watch means that conditions may develop that lead
to flash flooding. Flash flooding is a very dangerous situation.

You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.

&&

$$
226 
WGUS61 KBOX 250831
FFABOX

Flood Watch
National Weather Service Taunton MA
431 AM EDT Wed Oct 25 2017

MAZ005>007-013>016-RIZ001>004-006-008-251600-
/O.CON.KBOX.FF.A.0008.000000T0000Z-171025T1600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Central Middlesex MA-Western Essex MA-Eastern Essex MA-
Western Norfolk MA-Southeast Middlesex MA-Suffolk MA-
Eastern Norfolk MA-Northwest Providence RI-
Southeast Providence RI-Western Kent RI-Eastern Kent RI-
Washington RI-Block Island RI-
Including the cities of Framingham, Lowell, Lawrence, Gloucester,
Foxborough, Norwood, Cambridge, Boston, Quincy, Foster, 
Smithfield, Providence, Coventry, West Greenwich, East Greenwich,
Warwick, West Warwick, Narragansett, Westerly, and New Shoreham
431 AM EDT Wed Oct 25 2017

...FLASH FLOOD WATCH UNTIL NOON EDT TODAY...

The Flash Flood Watch continues for

* Central and Southeast Middlesex, Essex, Norfolk, and Suffolk
  Counties in Massachusetts. Block Island, Kent, Providence, and
  Washington Counties in Rhode Island

* Until noon today.

* Moderate to heavy rain is presently ongoing producing rainfall
  rates of 1 up to 2 inches per hour. Anticipate impacts through
  the morning commute. 

* Excessive rainfall, especially with any thunderstorms, could 
  lead to flash flooding at some of the faster responding 
  streams and rivers in the region as well as in urban centers. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flash Flood Watch means that conditions may develop that lead
to flash flooding. Flash flooding is a very dangerous situation.

You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.

&&

$$

MAZ017>021-RIZ005-007-251645-
/O.CON.KBOX.FF.A.0008.000000T0000Z-171025T2000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Northern Bristol MA-Western Plymouth MA-Eastern Plymouth MA-
Southern Bristol MA-Southern Plymouth MA-Bristol RI-Newport RI-
Including the cities of Taunton, Brockton, Plymouth, Fall River, 
New Bedford, Mattapoisett, Bristol, and Newport
431 AM EDT Wed Oct 25 2017

...FLASH FLOOD WATCH UNTIL 4 PM EDT THIS AFTERNOON...

The Flash Flood Watch continues for

* Bristol and Plymouth Counties in Massachusetts. Bristol and
  Newport Counties in Rhode Island

* Until 4 PM EDT this afternoon.

* Moderate to heavy rain is presently ongoing producing rainfall 
  rates of 1 up to 2 inches per hour. Anticipate impacts through 
  the morning commute continuing through early afternoon. 

* Excessive rainfall, especially with any thunderstorms, could 
  lead to flash flooding at some of the faster responding 
  streams and rivers in the region as well as in urban centers. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flash Flood Watch means that conditions may develop that lead
to flash flooding. Flash flooding is a very dangerous situation.

You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.

&&

$$

MAZ022>024-251645-
/O.CON.KBOX.FF.A.0008.000000T0000Z-171026T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Barnstable MA-Dukes MA-Nantucket MA-
Including the cities of Chatham, Falmouth, Provincetown, 
Vineyard Haven, and Nantucket
431 AM EDT Wed Oct 25 2017

...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH THIS EVENING...

The Flash Flood Watch continues for

* Barnstable, Dukes, and Nantucket Counties in Massachusetts

* Through this evening.

* Moderate to heavy rain will impact the region this morning and 
  continue into the evening hours. 

* Excessive rainfall, especially with any thunderstorms, could 
  lead to flash flooding at some of the faster responding 
  streams and rivers in the region as well as in urban centers. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flash Flood Watch means that conditions may develop that lead
to flash flooding. Flash flooding is a very dangerous situation.

You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.

&&

$$
584 
WGUS61 KBOX 251549
FFABOX

Flood Watch
National Weather Service Taunton MA
1149 AM EDT Wed Oct 25 2017

MAZ005>007-013>016-RIZ001>004-006-008-251700-
/O.EXP.KBOX.FF.A.0008.000000T0000Z-171025T1600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Central Middlesex MA-Western Essex MA-Eastern Essex MA-
Western Norfolk MA-Southeast Middlesex MA-Suffolk MA-
Eastern Norfolk MA-Northwest Providence RI-
Southeast Providence RI-Western Kent RI-Eastern Kent RI-
Washington RI-Block Island RI-
Including the cities of Framingham, Lowell, Lawrence, Gloucester,
Foxborough, Norwood, Cambridge, Boston, Quincy, Foster, 
Smithfield, Providence, Coventry, West Greenwich, East Greenwich,
Warwick, West Warwick, Narragansett, Westerly, and New Shoreham
1149 AM EDT Wed Oct 25 2017

...FLASH FLOOD WATCH WILL EXPIRE AT NOON EDT TODAY...

Periods of light to moderate rain will cross through the area 
during this afternoon and tonight. However the heavier rainfall 
has shifted to the east. The Flash Flood Watch that has been in 
effect for Boston, northeast and Metro West Massachusetts, and
much of Rhode Island will expire at noon EDT today.

$$

MAZ017>021-RIZ005-007-252000-
/O.CON.KBOX.FF.A.0008.000000T0000Z-171025T2000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Northern Bristol MA-Western Plymouth MA-Eastern Plymouth MA-
Southern Bristol MA-Southern Plymouth MA-Bristol RI-Newport RI-
Including the cities of Taunton, Brockton, Plymouth, Fall River, 
New Bedford, Mattapoisett, Bristol, and Newport
1149 AM EDT Wed Oct 25 2017

...FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL 4 PM EDT THIS
AFTERNOON...

The Flash Flood Watch continues for

* Portions of southeastern Massachusetts and Rhode Island, 
  including the following areas, in southeastern Massachusetts, 
  Bristol and Plymouth. In Rhode Island, Bristol and Newport. 

* Until 4 PM EDT this afternoon

* Periods of rain will continue this afternoon. The potential
  exists for rainfall rates of 1 to 2 inches per hour.
 
* Excessive rainfall could lead to flash flooding at some of the 
  faster responding streams and rivers in the region as well as in
  urban centers. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flash Flood Watch means that conditions may develop that lead
to flash flooding. Flash flooding is a very dangerous situation.

You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.

&&

$$

MAZ022>024-260000-
/O.CON.KBOX.FF.A.0008.000000T0000Z-171026T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Barnstable MA-Dukes MA-Nantucket MA-
Including the cities of Chatham, Falmouth, Provincetown, 
Vineyard Haven, and Nantucket
1149 AM EDT Wed Oct 25 2017

...FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL 8 PM EDT THIS
EVENING...

The Flash Flood Watch continues for

* A portion of southeastern Massachusetts, including the 
  following areas, Barnstable, Dukes, and Nantucket. 

* Until 8 PM EDT this evening

* Periods of rain, moderate to heavy at times, will impact the
  region this afternoon and continue into the evening hours. 

* Excessive rainfall, especially with any thunderstorms, could
  lead to flash flooding in urban centers and other poor drainage
  areas.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flash Flood Watch means that conditions may develop that lead
to flash flooding. Flash flooding is a very dangerous situation.

You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.

&&

$$

NMB
799 
WGUS61 KBOX 252003
FFABOX

Flood Watch
National Weather Service Taunton MA
403 PM EDT Wed Oct 25 2017

MAZ017>021-RIZ005-007-252115-
/O.EXP.KBOX.FF.A.0008.000000T0000Z-171025T2000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Northern Bristol MA-Western Plymouth MA-Eastern Plymouth MA-
Southern Bristol MA-Southern Plymouth MA-Bristol RI-Newport RI-
Including the cities of Taunton, Brockton, Plymouth, Fall River, 
New Bedford, Mattapoisett, Bristol, and Newport
403 PM EDT Wed Oct 25 2017

...FLASH FLOOD WATCH HAS EXPIRED...

The Flash Flood Watch for portions of southeastern Massachusetts
and Rhode Island has expired. 

Showers will linger across Rhode Island and southeast
Massachusetts, but heavy rainfall that could produce flooding has
ended.

$$

MAZ022>024-260000-
/O.CON.KBOX.FF.A.0008.000000T0000Z-171026T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Barnstable MA-Dukes MA-Nantucket MA-
Including the cities of Chatham, Falmouth, Provincetown, 
Vineyard Haven, and Nantucket
403 PM EDT Wed Oct 25 2017

...FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL 8 PM EDT THIS
EVENING...

The Flash Flood Watch continues for

* A portion of southeastern Massachusetts, including the 
  following areas, Barnstable, Dukes, and Nantucket. 

* Until 8 PM EDT this evening.

* Periods of rain, moderate to heavy at times, will impact the 
  region this afternoon and continue into the evening hours. 

* Excessive rainfall, especially with any thunderstorms, could 
  lead to flash flooding in urban centers and other poor 
  drainage areas. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flash Flood Watch means that conditions may develop that lead
to flash flooding. Flash flooding is a very dangerous situation.

You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.

&&

$$

What forecasters said that day

The local office's own words before this flash flood watch went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Boston/Norton, MA wrote its last area forecast discussion before this flash flood watch went out at Oct 23, 10:59 AM EDT, 5 hours 2 minutes earlier.

Area forecast discussion, Oct 23, 10:59 AM EDT, 5 hours 2 minutes before
Area Forecast Discussion
National Weather Service Taunton MA
1059 AM EDT Mon Oct 23 2017

.SYNOPSIS...
High pressure offshore will provide mild temperatures today but
also increasing humidity. A slow moving cold front will bring
rounds of heavy rain Tuesday into Wednesday with a period of
strong to damaging wind gusts possible. A few lingering showers
are possible Thursday, but the trend towards drier, less humid
and more seasonable temperatures are expected Thursday into
Friday. Above normal temperatures may return by this weekend.

&&

.NEAR TERM /UNTIL 6 PM THIS EVENING/...

1025 AM Update...

Patchy dense fog lingers across portions of the region,
though not as organized as it was earlier this morning so
allowed the Dense Fog Advisory to expire. Low clouds also linger
across most of the interior, though noting breaks in the clouds
across portions of the CT valley and across coastal SE RI and S
Mass including Cape Cod and the islands on the latest GOES-16
(prelim, non-operational) satellite imagery. Seems the light
wind field across eastern areas holding from the SE, which
appears to keep the low visibility going into early this
afternoon before briefly lifting through the remainder of the
day.

Still some question as to whether any scattered showers will
develop across portions of the CT valley later this afternoon.
Noting some differences in model solutions for later this
afternoon/evening as to whether there will be enough low level
lift and instability for any showers to develop there. Have kept
slight chance POPs mainly for the E slopes of the Berkshires
after 18Z or so, which might slip toward the
Springfield/Hartford areas later today.

As the winds slowly veer to S during the remainder of the day,
will see temps slowly rise even with the cloud cover. Have kept
max temps in the mid-upper 60s across the interior higher
terrain to the lower 70s elsewhere.

Have updated forecast to incorporate current trends through the
remainder of the day.

Previous Discussion...

As the visibility slowly improves, lower clouds will linger a
while longer. This will mean somewhat lower max temperatures,
but still well above normal for mid/late October.

Much of today should remain dry, but cannot completely dismiss
the possibility of a few showers reaching western MA and
portions of CT late today.

&&

.SHORT TERM /6 PM THIS EVENING THROUGH 6 PM TUESDAY/...
Precipitable water increases tonight into Tuesday. Widespread
showers arrive along a cold front late tonight into Tuesday,
especially from Worcester county west. Strong winds of 35-40 kt
jet just off the deck. Gusty winds will be more likely within
areas of heavier rainfall, especially Tuesday.

Low temperatures tonight should be close to our normal high
temperatures, with some increase in temperatures Tuesday from
the strong low level warm advection.

&&

.LONG TERM /TUESDAY NIGHT THROUGH SUNDAY/...
Highlights...

* Period of strong to damaging wind gusts possible Tue into Wed

* Heavy rain will result in an urban/street flooding threat
  Tue-Wed along with low risk of isolated flash flood threat

* Less humid & more seasonable weather finally return Thu/Fri

Tue night and Wed...

Synoptic Overview...

Slow moving cold front becomes parallel to upper flow as mid
level trough takes on negative tilt. This front will be
associated with an impressive warm conveyor belt up the eastern
seaboard containing subtropical moisture with PWATs near the
2.00 inch mark, or nearly 3 std deviations above normal. Also
embedded within this warm conveyor belt is very strong wind
anomalies with 925 mb wind speeds of 55-65 kts, +4 std
deviations above climo! This low level jet builds a low level
thermal anomaly with nearly moist adiabatic lapse rates above
this warm anomaly. This very strong low level jet also advects
surface dew pts into the mid and upper 60s across southern New
England late Tue into early Wed, generating MUcapes of 300-500
j/kg, very impressive for late Oct.

Wind risk...

As mentioned above low level jet peaks at about 55-65 kt late
Tue into early Wed. Heavier showers (via precip drag) and
especially potential low top fine line (very strong frontal
convergence coupled with marginal instability) across western
MA/CT will increase the risk for stronger winds aloft mixing to
the surface. Given leaves remain on most trees, this will
exacerbate the risk for downed limbs or even some trees with
localized power outages. Wind headlines will likely be needed as
we draw closer to the event.

Heavy rain...

Subtropical moisture streams up the eastern seaboard with PWATs
nearing 2 inches, +4 std deviations from climo for about 24-30
hrs! This duration coupled with strong frontal forcing and
marginal instability should be sufficient for periods of heavy
showers with isolated thunder possible. Much of the global
guidance offering a widespread 1-2" rainfall amounts with
localized 3-5" possible especially eastern NY into western MA/CT
given greater risk of low top fine line.

Thu...

Global guidance including ensembles suggest dry slot moves
across the area, thus a drying trend develops. However cold pool
aloft combined with cyclonic low may result in isolated diurnal
showers especially across the high terrain. Otherwise mainly
dry weather is expected. Turning less humid but only seasonably
cool.

Fri through the weekend...

Looks like a period of short wave ridging between departing
trough and next trough upstream arriving here Sunday or early
next week. Ensembles suggest post frontal airmass Fri will be
close to seasonably normal and continuing into Sat along with
mainly dry weather. Ensembles also advertising long wave eastern
seaboard trough reloads with new jet energy around Sunday with
subtropical connection given high amplitude trough.

&&

.AVIATION /15Z MONDAY THROUGH FRIDAY/...
Forecaster Confidence Levels...

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

Short Term /through Tuesday/....

Through this afternoon...Moderate confidence mainly in timing of
any showers developing over western areas during the afternoon.
Some lingering MVFR-IFR conditions across portions of the region
but should become mainly VFR by around 18Z or so. However, MVFR
CIGS may return across western MA/N central CT during the late
afternoon. May see isolated showers move into western areas
after 18Z-20Z. S winds increase to around 10 kt.

Tonight...Moderate confidence. Conditions lower to MVFR-IFR
across N central and western areas this evening in scattered
showers and patchy fog. VFR conditions to start across S central
and eastern areas, but CIGS lower to MVFR to local IFR after
midnight as showers slowly move E. Patchy fog will lower VSBYS
to MVFR to local IFR as well. S winds gusting to 20-25 kt along
S coastal areas after midnight.

Tuesday...High confidence in trends. Moderate confidence in
timing. Mainly IFR with occasional MVFR in low CIGS rain/fog. Some
occasional TS also possible with heavy RA at times. Winds gust
20-30 kt most of the region out of the S-SE with a few gusts
30-40 kt mainly SE MA/Cape/Islands. Cannot rule out stronger
gusts everywhere in heavier rainfall/thunderstorms. Areas of
LLWS likely, especially after 15Z.

KBOS Terminal...Moderate confidence in TAF due to timing issues
with CIG improvement later this morning. Possible IFR could
linger longer than current forecast.

KBDL Terminal...Moderate confidence in TAF. Mainly VFR. May see
brief MVFR-IFR VSBYS in patchy fog through 14Z or so but should
improve by morning push.

Outlook /Tuesday Night through Friday/...

Tuesday Night: Mainly MVFR, with local IFR possible. Windy with
gusts to 35 kt. SHRA, chance TSRA, patchy BR.
Wednesday: Mainly VFR, with local IFR possible. Windy with
gusts to 30 kt. SHRA, chance TSRA, patchy BR.
Wednesday Night: Mainly VFR, with areas MVFR possible. Breezy.
Chance SHRA.
Thursday: Mainly VFR, with areas MVFR possible. Chance SHRA.
Thursday Night through Friday:VFR.

&&

.MARINE...
Forecaster Confidence Levels...

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

Short Term /through Tuesday/...

Relatively light winds and seas continue across the waters into
this evening. Increasing south winds ahead of a cold front will
also mean building seas tonight into Tuesday, especially across
the southern coastal waters. Moderate risk for gale force gusts
Tuesday across most of the waters.

Lingering pockets of poor visibility linger off E coastal Mass,
but should improve during the early to mid afternoon.

Outlook /Tuesday Night through Friday/...

Tuesday Night: Low risk for gale force winds with gusts up to
35 kt. Rough seas up to 12 ft. Rain showers, chance of
thunderstorms, patchy fog. Local visibility 1 to 3 nm.
Wednesday: Low risk for Small Craft Advisory winds with gusts
up to 30 kt. Rough seas up to 13 ft. Rain showers, chance of
thunderstorms, patchy fog. Local visibility 1 nm or less.
Wednesday Night: Winds less than 25 kt. Rough seas up to 11 ft.
Rain showers.
Thursday: Winds less than 25 kt. Areas of rough seas. Chance of
rain showers.
Thursday Night: Winds less than 25 kt. Local rough seas. Slight
chance of rain showers.
Friday: Winds less than 25 kt. Areas of seas approaching 5 ft.

&&

.BOX WATCHES/WARNINGS/ADVISORIES...
CT...None.
MA...None.
RI...None.
MARINE...Gale Watch from Tuesday morning through Wednesday morning for
     ANZ231>235-237-255-256.
     Small Craft Advisory from 8 AM to 6 PM EDT Tuesday for ANZ230-
     251.
     Gale Watch from Tuesday afternoon through Tuesday evening for
     ANZ236.
     Gale Watch from Tuesday afternoon through Wednesday morning
     for ANZ250-254.

&&

SYNOPSIS...Belk/Nocera
NEAR TERM...Nocera/EVT
SHORT TERM...Belk
LONG TERM...Nocera
AVIATION...Belk/Nocera/EVT
MARINE...Belk/Nocera/EVT
Hazardous weather outlook, Oct 23, 3:57 AM EDT, 12 hours 4 minutes before
Hazardous Weather Outlook
National Weather Service Taunton MA
357 AM EDT Mon Oct 23 2017

CTZ002>004-MAZ002>012-014-015-026-RIZ008-240800-
Hartford CT-Tolland CT-Windham CT-Western Franklin MA-
Eastern Franklin MA-Northern Worcester MA-Central Middlesex MA-
Western Essex MA-Eastern Essex MA-Western Hampshire MA-
Western Hampden MA-Eastern Hampshire MA-Eastern Hampden MA-
Southern Worcester MA-Southeast Middlesex MA-Suffolk MA-
Northern Middlesex MA-Block Island RI-
357 AM EDT Mon Oct 23 2017

This Hazardous Weather Outlook is for northern Connecticut, central
Massachusetts, eastern Massachusetts, northeastern Massachusetts,
western Massachusetts and southern Rhode Island.

.DAY ONE...Today and Tonight.

Hazardous weather is not expected at this time.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

A period of southerly wind gusts of 35 to 45 mph are possible
Tuesday afternoon into Wednesday morning with a low risk for a few
gusts up to 60 mph. The highest risk for these strong wind gusts
will be across eastern MA and RI. Most trees are still close to
fully leafed, so these wind gusts may bring an increased risk for
some downed trees and isolated to scattered power outages.

Periods of heavy rain will also bring the risk of some urban/street
flooding Tuesday afternoon into Wednesday.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

MAZ013-016>024-RIZ001>007-240800-
Western Norfolk MA-Eastern Norfolk MA-Northern Bristol MA-
Western Plymouth MA-Eastern Plymouth MA-Southern Bristol MA-
Southern Plymouth MA-Barnstable MA-Dukes MA-Nantucket MA-
Northwest Providence RI-Southeast Providence RI-Western Kent RI-
Eastern Kent RI-Bristol RI-Washington RI-Newport RI-
357 AM EDT Mon Oct 23 2017

...DENSE FOG ADVISORY IN EFFECT UNTIL 10 AM EDT THIS MORNING...

This Hazardous Weather Outlook is for eastern Massachusetts,
southeastern Massachusetts, northern Rhode Island and southern
Rhode Island.

.DAY ONE...Today and Tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Dense Fog Advisory.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

A period of southerly wind gusts of 35 to 45 mph are possible
Tuesday afternoon into Wednesday morning with a low risk for a few
gusts up to 60 mph. The highest risk for these strong wind gusts
will be across eastern MA and RI. Most trees are still close to
fully leafed, so these wind gusts may bring an increased risk for
some downed trees and isolated to scattered power outages.

Periods of heavy rain will also bring the risk of some urban/street
flooding Tuesday afternoon into Wednesday.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

ANZ231>235-237-255-256-240800-
Cape Cod Bay-Nantucket Sound-Vineyard Sound-Buzzards Bay-
Rhode Island Sound-Block Island Sound-
Coastal Waters extending out to 25 nm South of Marthas Vineyard and
Nantucket-
Coastal Waters from Montauk NY to Marthas Vineyard extending out to
20 nm South of Block Island-
357 AM EDT Mon Oct 23 2017

...GALE WATCH IN EFFECT FROM TUESDAY MORNING THROUGH WEDNESDAY
MORNING...

This Hazardous Weather Outlook is for Massachusetts coastal waters
and Rhode Island coastal waters.

.DAY ONE...Today and Tonight.

Hazardous weather is not expected at this time.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Gale Watch.

Southerly gale force wind gusts possible Tuesday afternoon into
Wednesday morning.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

ANZ250-254-240800-
Coastal waters east of Ipswich Bay and the Stellwagen Bank National
Marine Sanctuary-
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA
out 20 nm-
357 AM EDT Mon Oct 23 2017

...GALE WATCH IN EFFECT FROM TUESDAY AFTERNOON THROUGH WEDNESDAY
MORNING...

This Hazardous Weather Outlook is for Massachusetts coastal waters.

.DAY ONE...Today and Tonight.

Hazardous weather is not expected at this time.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Gale Watch.

Southerly gale force wind gusts possible Tuesday afternoon into
Wednesday morning.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

ANZ230-251-240800-
Boston Harbor-Massachusetts Bay and Ipswich Bay-
357 AM EDT Mon Oct 23 2017

This Hazardous Weather Outlook is for Massachusetts coastal waters.

.DAY ONE...Today and Tonight.

Hazardous weather is not expected at this time.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

Southerly gale force wind gusts Tuesday afternoon into Wednesday
morning.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

ANZ236-240800-
Narragansett Bay-
357 AM EDT Mon Oct 23 2017

...GALE WATCH IN EFFECT FROM TUESDAY AFTERNOON THROUGH TUESDAY
EVENING...

This Hazardous Weather Outlook is for Rhode Island coastal waters.

.DAY ONE...Today and Tonight.

Hazardous weather is not expected at this time.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Gale Watch.

Southerly gale force wind gusts Tuesday afternoon into Wednesday
morning.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

For the latest updates...please visit our webpage at
www.weather.gov/boston

You can follow us on Facebook at
www.facebook.com/NWSBoston

You can follow us on Twitter at
@NWSBoston

The office that day

Everything else NWS Boston/Norton, MA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Oct 23, 3:23 AM EDTDense Fog AdvisoryBOXBarnstable, Bristol, Dukes, Hampden, Nantucket, Norfolk and 2 more7 hr
Oct 23, 4:19 AM EDTGale WatchBOX12 hr
Oct 23, 3:58 PM EDTGale WarningBOX43 hr
Oct 23, 4:04 PM EDTWind AdvisoryBOXBarnstable, Bristol, Dukes, Essex, Franklin, Hampden and 7 more40 hr

Nearby

Flash Flood Watches in Massachusetts, 2017Flash Flood Watches in Rhode Island, 2017Flash Flood Watches in Connecticut, 2017Every flash flood watch in 2017

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.