Alert archive / Massachusetts / Flash Flood Watches in 2013

Flash Flood Watch 7, NWS Boston/Norton, MA

July 23, 20134 states

NWS Boston/Norton, MA issued this flash flood watch at Jul 23, 2013, 4:12 AM EDT for 4 states. It was in force for 15 hr.

The area

The counties it named.

The facts

Issued
Jul 23, 2013, 4:12 AM EDT (08:12 UTC)
Expired
Jul 23, 2013, 7:11 PM EDT
In force
15 hr
Issued by
NWS Boston/Norton, MA
Flood severity
None

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

The radar

The Boston radar (KBOX), 49 km from the middle of the area, began a volume at 08:15 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 00:00Z, 8.2 hours before the alert went out and 151 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 00:00Z on 2013-07-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 287 joules per kilogram.LCLLFCEL10008507005003002001001 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 00:00Z on 2013-07-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 63 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
287 J/kg
Mixed-layer CIN
-20 J/kg
Mixed-layer LCL
438 m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
63 m²/s²
0-3 km storm-relative helicity
94 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.6

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

646 
WGUS61 KBOX 230812
FFABOX

URGENT - IMMEDIATE BROADCAST REQUESTED
FLOOD WATCH
NATIONAL WEATHER SERVICE TAUNTON MA
412 AM EDT TUE JUL 23 2013

...FLASH FLOODING POSSIBLE INTO THIS EVENING...

.WARM FRONT ACROSS SOUTHERN NEW ENGLAND WILL BE THE MAIN FOCUS
THIS MORNING FOR LOCALLY HEAVY RAINFALL. AS THE WARM FRONT LIFTS
NORTHWARD...ADDITIONAL SHOWERS AND THUNDERSTORMS ARE EXPECTED TO
DEVELOP LATE THIS MORNING INTO THE AFTERNOON HOURS. THESE SHOWERS
AND THUNDERSTORMS COULD BRING TORRENTIAL RAINFALL INCREASING THE
FLASH FLOOD THREAT FOR THE REGION. 

CTZ002>004-MAZ002>016-026-NHZ011-012-015-RIZ001-002-231615-
/O.NEW.KBOX.FF.A.0007.130723T0812Z-130724T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
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-WESTERN NORFOLK MA-SOUTHEAST MIDDLESEX MA-
SUFFOLK MA-EASTERN NORFOLK MA-NORTHERN MIDDLESEX MA-CHESHIRE NH-
EASTERN HILLSBOROUGH NH-WESTERN AND CENTRAL HILLSBOROUGH NH-
NORTHWEST PROVIDENCE RI-SOUTHEAST PROVIDENCE RI-
INCLUDING THE CITIES OF...HARTFORD...WINDSOR LOCKS...UNION...
VERNON...PUTNAM...WILLIMANTIC...CHARLEMONT...GREENFIELD...
ORANGE...BARRE...FITCHBURG...FRAMINGHAM...LOWELL...LAWRENCE...
GLOUCESTER...CHESTERFIELD...BLANDFORD...AMHERST...NORTHAMPTON...
SPRINGFIELD...MILFORD...WORCESTER...FOXBORO...NORWOOD...
CAMBRIDGE...BOSTON...QUINCY...AYER...JAFFREY...KEENE...
MANCHESTER...NASHUA...PETERBOROUGH...WEARE...FOSTER...
SMITHFIELD...PROVIDENCE
412 AM EDT TUE JUL 23 2013

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

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A

* FLASH FLOOD WATCH FOR NORTHERN CONNECTICUT...SOUTHERN NEW
  HAMPSHIRE...NORTHERN RHODE ISLAND...AND MASSACHUSETTS ALONG AND
  NORTH AND WEST OF INTERSTATE 95. THIS INCLUDES THE CITIES OF
  PROVIDENCE...HARTFORD...WORCESTER AND BOSTON.

* THROUGH THIS EVENING

* EARLY MORNING RAINFALL HAS PRODUCED BETWEEN 1-2 INCHES
  ALREADY...WITH A FEW LOCATIONS ACROSS NORTHWEST MASSACHUSETTS
  SEEING OVER 3 INCHES. AS THE GROUND IS ALREADY SATURATED ACROSS
  THE INTERIOR...AND WITH MORE PRECIPITATION MOVING THROUGH THIS
  MORNING AND THE RISK OF SHOWERS AND THUNDERSTORMS TO DEVELOP
  THIS AFTERNOON INCREASING THE THREAT FOR FLASH FLOODING.

* EXPECT RAINFALL RATES IN THE HEAVIEST SHOWERS AND STORMS
  EXCEEDING 2 INCHES PER HOUR. THIS WILL POSE A DANGER FOR
  LOCALIZED FLASH FLOODING OF ROADS...SMALL CREEKS...AND STREAMS.
  URBAN REGIONS...AS WELL AS SMALL STREAMS THAT NORMALLY
  EXPERIENCE RAPID RISES WITH HEAVY RAINFALL ALSO ARE AT RISK.
  THE THREAT FOR HEAVY RAINFALL WILL WANE SIGNIFICANTLY BY EARLY
  THIS EVENING.

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.

&&

$$

DUNTEN
5 follow-up statements
558 
WGUS61 KBOX 231035
FFABOX

URGENT - IMMEDIATE BROADCAST REQUESTED
FLOOD WATCH
NATIONAL WEATHER SERVICE TAUNTON MA
635 AM EDT TUE JUL 23 2013

...FLASH FLOODING POSSIBLE INTO THIS EVENING...

.A WAVE OF LOW PRESSURE ALONG A WARM FRONT ACROSS SOUTHERN NEW
ENGLAND WILL BE THE MAIN FOCUS TODAY FOR LOCALLY HEAVY RAINFALL.
AS THE WARM FRONT LIFTS NORTHWARD...ADDITIONAL SHOWERS AND
THUNDERSTORMS ARE EXPECTED TO DEVELOP LATE THIS MORNING INTO THE
AFTERNOON HOURS. THESE SHOWERS AND THUNDERSTORMS COULD BRING
TORRENTIAL RAINFALL INCREASING THE FLASH FLOOD THREAT FOR THE
REGION.

MAZ017>021-RIZ003>007-231845-
/O.EXA.KBOX.FF.A.0007.000000T0000Z-130724T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
NORTHERN BRISTOL MA-WESTERN PLYMOUTH MA-EASTERN PLYMOUTH MA-
SOUTHERN BRISTOL MA-SOUTHERN PLYMOUTH MA-WESTERN KENT RI-
EASTERN KENT RI-BRISTOL RI-WASHINGTON RI-NEWPORT RI-
INCLUDING THE CITIES OF...TAUNTON...BROCKTON...PLYMOUTH...
FALL RIVER...NEW BEDFORD...MATTAPOISETT...WEST GREENWICH...
WARWICK...BRISTOL...NARRAGANSETT...WESTERLY...NEWPORT
635 AM EDT TUE JUL 23 2013

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

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS EXPANDED THE

* FLASH FLOOD WATCH TO INCLUDE PORTIONS OF SOUTHEASTERN 
  MASSACHUSETTS AND RHODE ISLAND...INCLUDING THE FOLLOWING 
  AREAS...IN SOUTHEASTERN MASSACHUSETTS...EASTERN PLYMOUTH MA... 
  NORTHERN BRISTOL MA...SOUTHERN BRISTOL MA...SOUTHERN PLYMOUTH 
  MA AND WESTERN PLYMOUTH MA. IN RHODE ISLAND...BRISTOL RI... 
  EASTERN KENT RI...NEWPORT RI...WASHINGTON RI AND WESTERN KENT 
  RI. 

* THROUGH THIS EVENING

* EXPECT RAINFALL RATES IN THE HEAVIEST SHOWERS AND STORMS 
  EXCEEDING 2 INCHES PER HOUR. THIS WILL POSE A DANGER FOR 
  LOCALIZED FLASH FLOODING OF ROADS...SMALL CREEKS...AND 
  STREAMS. URBAN REGIONS...AS WELL AS SMALL STREAMS THAT 
  NORMALLY EXPERIENCE RAPID RISES WITH HEAVY RAINFALL ALSO ARE 
  AT RISK. THE THREAT FOR HEAVY RAINFALL WILL WANE SIGNIFICANTLY 
  BY EARLY THIS EVENING. 

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>016-026-NHZ011-012-015-RIZ001-002-231845-
/O.CON.KBOX.FF.A.0007.000000T0000Z-130724T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
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-WESTERN NORFOLK MA-SOUTHEAST MIDDLESEX MA-
SUFFOLK MA-EASTERN NORFOLK MA-NORTHERN MIDDLESEX MA-CHESHIRE NH-
EASTERN HILLSBOROUGH NH-WESTERN AND CENTRAL HILLSBOROUGH NH-
NORTHWEST PROVIDENCE RI-SOUTHEAST PROVIDENCE RI-
INCLUDING THE CITIES OF...HARTFORD...WINDSOR LOCKS...UNION...
VERNON...PUTNAM...WILLIMANTIC...CHARLEMONT...GREENFIELD...
ORANGE...BARRE...FITCHBURG...FRAMINGHAM...LOWELL...LAWRENCE...
GLOUCESTER...CHESTERFIELD...BLANDFORD...AMHERST...NORTHAMPTON...
SPRINGFIELD...MILFORD...WORCESTER...FOXBORO...NORWOOD...
CAMBRIDGE...BOSTON...QUINCY...AYER...JAFFREY...KEENE...
MANCHESTER...NASHUA...PETERBOROUGH...WEARE...FOSTER...
SMITHFIELD...PROVIDENCE
635 AM EDT TUE JUL 23 2013

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

THE FLASH FLOOD WATCH CONTINUES FOR

* PORTIONS OF NORTHERN CONNECTICUT...MASSACHUSETTS...SOUTHERN 
  NEW HAMPSHIRE AND NORTHERN RHODE ISLAND...INCLUDING THE 
  FOLLOWING AREAS...IN NORTHERN CONNECTICUT...HARTFORD CT... 
  TOLLAND CT AND WINDHAM CT. IN MASSACHUSETTS...CENTRAL 
  MIDDLESEX MA...EASTERN ESSEX MA...EASTERN FRANKLIN MA... 
  EASTERN HAMPDEN MA...EASTERN HAMPSHIRE MA...EASTERN NORFOLK 
  MA...NORTHERN MIDDLESEX MA...NORTHERN WORCESTER MA...SOUTHEAST 
  MIDDLESEX MA...SOUTHERN WORCESTER MA...SUFFOLK MA...WESTERN 
  ESSEX MA...WESTERN FRANKLIN MA...WESTERN HAMPDEN MA...WESTERN 
  HAMPSHIRE MA AND WESTERN NORFOLK MA. IN SOUTHERN NEW 
  HAMPSHIRE...CHESHIRE NH...EASTERN HILLSBOROUGH NH AND WESTERN 
  AND CENTRAL HILLSBOROUGH NH. IN NORTHERN RHODE ISLAND... 
  NORTHWEST PROVIDENCE RI AND SOUTHEAST PROVIDENCE RI. 

* THROUGH THIS EVENING

* EARLY MORNING RAINFALL HAS PRODUCED BETWEEN 1-2 INCHES 
  ALREADY...WITH A FEW LOCATIONS ACROSS NORTHWEST MASSACHUSETTS 
  SEEING OVER 3 INCHES. AS THE GROUND IS ALREADY SATURATED 
  ACROSS THE INTERIOR...AND WITH MORE PRECIPITATION MOVING 
  THROUGH THIS MORNING AND THE RISK OF SHOWERS AND THUNDERSTORMS 
  TO DEVELOP THIS AFTERNOON INCREASING THE THREAT FOR FLASH 
  FLOODING. 

* EXPECT RAINFALL RATES IN THE HEAVIEST SHOWERS AND STORMS 
  EXCEEDING 2 INCHES PER HOUR. THIS WILL POSE A DANGER FOR 
  LOCALIZED FLASH FLOODING OF ROADS...SMALL CREEKS...AND 
  STREAMS. URBAN REGIONS...AS WELL AS SMALL STREAMS THAT 
  NORMALLY EXPERIENCE RAPID RISES WITH HEAVY RAINFALL ALSO ARE 
  AT RISK. THE THREAT FOR HEAVY RAINFALL WILL WANE SIGNIFICANTLY 
  BY EARLY THIS EVENING. 

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.

&&

$$

DUNTEN/NOCERA
335 
WGUS61 KBOX 231226
FFABOX

FLOOD WATCH
NATIONAL WEATHER SERVICE TAUNTON MA
826 AM EDT TUE JUL 23 2013

...FLASH FLOODING POSSIBLE INTO THIS EVENING...

.WHILE THE MAJORITY OF WIDESPREAD RAIN MOVES NORTH WITH THE WARM
FRONT...ADDITIONAL SHOWERS AND THUNDERSTORMS WILL CONTINUE TO
DEVELOP TOWARDS MIDDAY INTO THE AFTERNOON. THESE SHOWERS AND
THUNDERSTORMS COULD BRING TORRENTIAL RAINFALL INCREASING THE FLASH
FLOOD THREAT FOR THE REGION.

CTZ002>004-MAZ002>021-026-NHZ011-012-015-RIZ001>007-232030-
/O.CON.KBOX.FF.A.0007.000000T0000Z-130724T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
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-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-NORTHERN MIDDLESEX MA-CHESHIRE NH-
EASTERN HILLSBOROUGH NH-WESTERN AND CENTRAL HILLSBOROUGH NH-
NORTHWEST PROVIDENCE RI-SOUTHEAST PROVIDENCE RI-WESTERN KENT RI-
EASTERN KENT RI-BRISTOL RI-WASHINGTON RI-NEWPORT RI-
INCLUDING THE CITIES OF...HARTFORD...WINDSOR LOCKS...UNION...
VERNON...PUTNAM...WILLIMANTIC...CHARLEMONT...GREENFIELD...
ORANGE...BARRE...FITCHBURG...FRAMINGHAM...LOWELL...LAWRENCE...
GLOUCESTER...CHESTERFIELD...BLANDFORD...AMHERST...NORTHAMPTON...
SPRINGFIELD...MILFORD...WORCESTER...FOXBORO...NORWOOD...
CAMBRIDGE...BOSTON...QUINCY...TAUNTON...BROCKTON...PLYMOUTH...
FALL RIVER...NEW BEDFORD...MATTAPOISETT...AYER...JAFFREY...
KEENE...MANCHESTER...NASHUA...PETERBOROUGH...WEARE...FOSTER...
SMITHFIELD...PROVIDENCE...WEST GREENWICH...WARWICK...BRISTOL...
NARRAGANSETT...WESTERLY...NEWPORT
826 AM EDT TUE JUL 23 2013

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

THE FLASH FLOOD WATCH CONTINUES FOR

* PORTIONS OF NORTHERN CONNECTICUT...MASSACHUSETTS...SOUTHERN NEW
  HAMPSHIRE AND RHODE ISLAND...INCLUDING THE FOLLOWING COUNTIES...
  IN NORTHERN CONNECTICUT...HARTFORD...TOLLAND AND WINDHAM. IN
  MASSACHUSETTS...MIDDLESEX...ESSEX...FRANKLIN...HAMPDEN...HAMPSHIRE...
  NORFOLK...PLYMOUTH...BRISTOL...WORCESTER...SUFFOLK. IN SOUTHERN
  NEW HAMPSHIRE...CHESHIRE AND HILLSBOROUGH. IN RHODE ISLAND...
  BRISTOL...KENT...NEWPORT...PROVIDENCE AND WASHINGTON

* UNTIL 8 PM EDT THIS EVENING.

* EXPECT RAINFALL RATES IN THE HEAVIEST SHOWERS AND STORMS
  EXCEEDING 2 INCHES PER HOUR. THIS WILL POSE A DANGER FOR
  LOCALIZED FLASH FLOODING OF ROADS...SMALL CREEKS...AND STREAMS.
  URBAN REGIONS...AS WELL AS SMALL STREAMS THAT NORMALLY
  EXPERIENCE RAPID RISES WITH HEAVY RAINFALL ALSO ARE AT RISK. THE
  THREAT FOR HEAVY RAINFALL WILL WANE SIGNIFICANTLY BY EARLY THIS
  EVENING. 

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
688 
WGUS61 KBOX 231943
FFABOX

FLOOD WATCH
NATIONAL WEATHER SERVICE TAUNTON MA
343 PM EDT TUE JUL 23 2013

...FLASH FLOODING POSSIBLE INTO THIS EVENING...

.THUNDERSTORMS WITH HEAVY RAIN WILL CONTINUE INTO THE EARLY
EVENING HOURS. WITH THE EXPECTATION OF HOURLY RAINFALL RATES UP
TO AROUND 1.5 INCHES...TORRENTIAL RAINFALL WILL HAVE THE
PROPENSITY OF PRODUCING FLASH FLOODING.

CTZ002>004-MAZ002>021-026-NHZ011-012-015-RIZ001>007-240000-
/O.CON.KBOX.FF.A.0007.000000T0000Z-130724T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
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-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-NORTHERN MIDDLESEX MA-CHESHIRE NH-
EASTERN HILLSBOROUGH NH-WESTERN AND CENTRAL HILLSBOROUGH NH-
NORTHWEST PROVIDENCE RI-SOUTHEAST PROVIDENCE RI-WESTERN KENT RI-
EASTERN KENT RI-BRISTOL RI-WASHINGTON RI-NEWPORT RI-
INCLUDING THE CITIES OF...HARTFORD...WINDSOR LOCKS...UNION...
VERNON...PUTNAM...WILLIMANTIC...CHARLEMONT...GREENFIELD...
ORANGE...BARRE...FITCHBURG...FRAMINGHAM...LOWELL...LAWRENCE...
GLOUCESTER...CHESTERFIELD...BLANDFORD...AMHERST...NORTHAMPTON...
SPRINGFIELD...MILFORD...WORCESTER...FOXBORO...NORWOOD...
CAMBRIDGE...BOSTON...QUINCY...TAUNTON...BROCKTON...PLYMOUTH...
FALL RIVER...NEW BEDFORD...MATTAPOISETT...AYER...JAFFREY...
KEENE...MANCHESTER...NASHUA...PETERBOROUGH...WEARE...FOSTER...
SMITHFIELD...PROVIDENCE...WEST GREENWICH...WARWICK...BRISTOL...
NARRAGANSETT...WESTERLY...NEWPORT
343 PM EDT TUE JUL 23 2013

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

THE FLASH FLOOD WATCH CONTINUES FOR

* PORTIONS OF NORTHERN CONNECTICUT...MASSACHUSETTS...SOUTHERN NEW
  HAMPSHIRE AND RHODE ISLAND...INCLUDING THE FOLLOWING COUNTIES...
  IN NORTHERN CONNECTICUT...HARTFORD...TOLLAND AND WINDHAM. IN
  MASSACHUSETTS...MIDDLESEX...ESSEX...FRANKLIN...HAMPDEN...HAMPSHIRE...
  NORFOLK...PLYMOUTH...BRISTOL...WORCESTER...SUFFOLK. IN SOUTHERN
  NEW HAMPSHIRE...CHESHIRE AND HILLSBOROUGH. IN RHODE ISLAND...
  BRISTOL...KENT...NEWPORT...PROVIDENCE AND WASHINGTON

* UNTIL 8 PM EDT THIS EVENING.

* EXPECT RAINFALL RATES IN THE HEAVIEST SHOWERS AND STORMS UP TO
  AROUND 1.5 INCHES PER HOUR. THIS POSES A DANGER FOR LOCALIZED
  FLASH FLOODING OF ROADS...SMALL CREEKS...AND STREAMS. URBAN
  REGIONS...AS WELL AS SMALL STREAMS THAT NORMALLY EXPERIENCE
  RAPID RISES WITH HEAVY RAINFALL ALSO ARE AT RISK. THE THREAT FOR
  HEAVY RAINFALL WILL WANE SIGNIFICANTLY BY EARLY THIS EVENING.

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
262 
WGUS61 KBOX 232217
FFABOX

FLOOD WATCH
NATIONAL WEATHER SERVICE TAUNTON MA
617 PM EDT TUE JUL 23 2013

...FLASH FLOODING POSSIBLE INTO THIS EVENING...

.THUNDERSTORMS WITH HEAVY RAIN WILL CONTINUE INTO THE EARLY
EVENING HOURS. WITH THE EXPECTATION OF HOURLY RAINFALL RATES UP
TO AROUND 1.5 INCHES...TORRENTIAL RAINFALL WILL HAVE THE
PROPENSITY OF PRODUCING FLASH FLOODING.

CTZ002-MAZ002>004-008>011-026-NHZ011-012-015-232330-
/O.CAN.KBOX.FF.A.0007.000000T0000Z-130724T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
HARTFORD CT-WESTERN FRANKLIN MA-EASTERN FRANKLIN MA-
NORTHERN WORCESTER MA-WESTERN HAMPSHIRE MA-WESTERN HAMPDEN MA-
EASTERN HAMPSHIRE MA-EASTERN HAMPDEN MA-NORTHERN MIDDLESEX MA-
CHESHIRE NH-EASTERN HILLSBOROUGH NH-
WESTERN AND CENTRAL HILLSBOROUGH NH-
INCLUDING THE CITIES OF...HARTFORD...WINDSOR LOCKS...CHARLEMONT...
GREENFIELD...ORANGE...BARRE...FITCHBURG...CHESTERFIELD...
BLANDFORD...AMHERST...NORTHAMPTON...SPRINGFIELD...AYER...
JAFFREY...KEENE...MANCHESTER...NASHUA...PETERBOROUGH...WEARE
617 PM EDT TUE JUL 23 2013

...FLASH FLOOD WATCH IS CANCELLED...

THE FLASH FLOOD WATCH FOR PORTIONS OF NORTHERN CONNECTICUT...
MASSACHUSETTS AND SOUTHERN NEW HAMPSHIRE HAS BEEN CANCELLED. 
THUNDERSTORMS HAVE MOVED OFF TO THE EAST. A FEW SCATTERED STORMS
IN THE CATSKILLS SHOULD DIMINISH BY THE TIME THEY REACH NEW
ENGLAND.

$$

CTZ003-004-MAZ005>007-012>021-RIZ001>007-240000-
/O.CON.KBOX.FF.A.0007.000000T0000Z-130724T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
TOLLAND CT-WINDHAM CT-CENTRAL MIDDLESEX MA-WESTERN ESSEX MA-
EASTERN ESSEX MA-SOUTHERN WORCESTER 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-NORTHWEST PROVIDENCE RI-
SOUTHEAST PROVIDENCE RI-WESTERN KENT RI-EASTERN KENT RI-
BRISTOL RI-WASHINGTON RI-NEWPORT RI-
INCLUDING THE CITIES OF...UNION...VERNON...PUTNAM...WILLIMANTIC...
FRAMINGHAM...LOWELL...LAWRENCE...GLOUCESTER...MILFORD...
WORCESTER...FOXBORO...NORWOOD...CAMBRIDGE...BOSTON...QUINCY...
TAUNTON...BROCKTON...PLYMOUTH...FALL RIVER...NEW BEDFORD...
MATTAPOISETT...FOSTER...SMITHFIELD...PROVIDENCE...
WEST GREENWICH...WARWICK...BRISTOL...NARRAGANSETT...WESTERLY...
NEWPORT
617 PM EDT TUE JUL 23 2013

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

THE FLASH FLOOD WATCH CONTINUES FOR

* PORTIONS OF NORTHERN CONNECTICUT...MASSACHUSETTS AND RHODE 
  ISLAND...INCLUDING THE FOLLOWING AREAS...IN NORTHERN 
  CONNECTICUT...TOLLAND CT AND WINDHAM CT. IN MASSACHUSETTS... 
  CENTRAL MIDDLESEX MA...EASTERN ESSEX MA...EASTERN NORFOLK MA...
   EASTERN PLYMOUTH MA...NORTHERN BRISTOL MA...SOUTHEAST 
  MIDDLESEX MA...SOUTHERN BRISTOL MA...SOUTHERN PLYMOUTH MA... 
  SOUTHERN WORCESTER MA...SUFFOLK MA...WESTERN ESSEX MA... 
  WESTERN NORFOLK MA AND WESTERN PLYMOUTH MA. IN RHODE ISLAND... 
  BRISTOL RI...EASTERN KENT RI...NEWPORT RI...NORTHWEST 
  PROVIDENCE RI...SOUTHEAST PROVIDENCE RI...WASHINGTON RI AND 
  WESTERN KENT RI. 

* UNTIL 8 PM EDT THIS EVENING

* EXPECT RAINFALL RATES IN THE HEAVIEST SHOWERS AND STORMS UP TO 
  AROUND 1.5 INCHES PER HOUR. THIS POSES A DANGER FOR LOCALIZED 
  FLASH FLOODING OF ROADS...SMALL CREEKS...AND STREAMS. URBAN 
  REGIONS...AS WELL AS SMALL STREAMS THAT NORMALLY EXPERIENCE 
  RAPID RISES WITH HEAVY RAINFALL ALSO ARE AT RISK. THE THREAT 
  FOR HEAVY RAINFALL WILL WANE SIGNIFICANTLY BY EARLY THIS 
  EVENING. 

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.

&&

$$
952 
WGUS61 KBOX 232311
FFABOX

FLOOD WATCH
NATIONAL WEATHER SERVICE TAUNTON MA
711 PM EDT TUE JUL 23 2013

CTZ003-004-MAZ005>007-012>021-RIZ001>007-240015-
/O.CAN.KBOX.FF.A.0007.000000T0000Z-130724T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
TOLLAND CT-WINDHAM CT-CENTRAL MIDDLESEX MA-WESTERN ESSEX MA-
EASTERN ESSEX MA-SOUTHERN WORCESTER 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-NORTHWEST PROVIDENCE RI-
SOUTHEAST PROVIDENCE RI-WESTERN KENT RI-EASTERN KENT RI-
BRISTOL RI-WASHINGTON RI-NEWPORT RI-
INCLUDING THE CITIES OF...UNION...VERNON...PUTNAM...WILLIMANTIC...
FRAMINGHAM...LOWELL...LAWRENCE...GLOUCESTER...MILFORD...
WORCESTER...FOXBORO...NORWOOD...CAMBRIDGE...BOSTON...QUINCY...
TAUNTON...BROCKTON...PLYMOUTH...FALL RIVER...NEW BEDFORD...
MATTAPOISETT...FOSTER...SMITHFIELD...PROVIDENCE...
WEST GREENWICH...WARWICK...BRISTOL...NARRAGANSETT...WESTERLY...
NEWPORT
711 PM EDT TUE JUL 23 2013

...FLASH FLOOD WATCH IS CANCELLED...

THE FLASH FLOOD WATCH FOR PORTIONS OF NORTHERN CONNECTICUT...
CENTRAL AND EASTERN MASSACHUSETTS AND RHODE ISLAND HAS BEEN
CANCELLED. SHOWERS AND THUNDERSTORMS CONTINUE TO WEAKEN THIS
EVENING ACROSS SOUTHERN NEW ENGLAND. THE THREAT OF NEW FLASH
FLOODING HAS ENDED FOR THIS EVENING.

$$

BELK

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 Jul 23, 2:02 AM EDT, 2 hours 10 minutes earlier.

Area forecast discussion, Jul 23, 2:02 AM EDT, 2 hours 10 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TAUNTON MA
202 AM EDT TUE JUL 23 2013

.SYNOPSIS...
A STALLED FRONT SOUTH OF NEW ENGLAND WILL PUSH NORTH ACROSS THE
REGION LATE TONIGHT AND TUESDAY WITH SHOWERS AND SCATTERED
THUNDERSTORMS...SOME WITH HEAVY RAIN. A COLD FRONT WILL SWEEP
ACROSS THE REGION WEDNESDAY FOLLOWED BY COOLER AND LESS HUMID
WEATHER THURSDAY AND FRIDAY. WARMER AIR RETURNS NEXT WEEKEND
BEFORE A COLD FRONT BRINGS SCATTERED SHOWERS/THUNDERSTORMS SUNDAY.
DRY AND LESS HUMID WEATHER SHOULD FOLLOW MONDAY.

&&

.NEAR TERM /UNTIL 6 AM THIS MORNING/...

200 AM UPDATE...

STATIONARY FRONT DRAPED ACROSS LONG ISLAND AND CENTRAL PA HAS
TURNED INTO A WARM FRONT AND IS STARTING TO LIFT NORTHWARD THROUGH
THE AREA. SEEMS FRONT IS DRAPED ACROSS THE CT/MA BORDER THEN
DROPS SOUTH OF ACK PER WINDS AND DEWS AT SURFACE OBS. CURRENT
RADAR SHOWING GOOD CONVECTION REGION MOVING ACROSS NW MA INTO
SOUTHERN NEW HAMPSHIRE. AS PWAT VALUES ARE ABOVE 2 INCHES ACROSS
THE REGION...STORM TOTAL PRECIP HAS SHOWN A GOOD 2-2.50 HAS
FALLEN ACROSS THE NW PORTION OF THE REGION. THEREFORE WE HAVE
ISSUED A FLASH FLOOD WARNING. OTHERWISE ATTENTION TURNS TO
UPCOMING CONVECTION ACROSS NJ AND BEGINNING TO DEVELOP ACROSS LONG
ISLAND SOUND. BELIEVE THESE STORMS WILL BE HEAVY RAINERS AS THEY
ARE DEVELOPING IN A GOOD MOIST ENVIRONMENT AND ELEVATED
INSTABILITY IS IN PLACE. EXPECT THESE CELLS TO CONVERGE AND MOVE
ACROSS THE WESTERN AND CENTRAL PORTION OF THE REGION MOVING FROM
THE SOUTH TO THE NORTH PER VWP WIND PROFILES. WOULD NOT BE
SURPRISED TO SEE MORE WARNINGS BEING ISSUED LATER THIS MORNING AND
INTO TODAY.

&&

.SHORT TERM /6 AM THIS MORNING THROUGH 6 PM WEDNESDAY/...
LATE TONIGHT THROUGH TUESDAY NIGHT...

***SHOWERS/THUNDERSTORMS WITH LOCALLY HEAVY RAINFALL TO THE
 NORTHWEST OF I-95 INTO TUE***

A COUPLE OF SHORTWAVES WILL BE MOVING AT US IN SOUTHWEST FLOW ALOFT
AHEAD OF AN APPROACHING COLD FRONT.  THESE SHORTWAVES ARE EVIDENT ON
RADAR WITH A LOT OF SHOWERS AND THUNDERSTORMS CURRENTLY OVER THE
OHIO VALLEY AND INTO PENNSYLVANIA.

THE MAIN CONCERN IS JUST HOW THESE SHORTWAVES INTERACT WITH A SLOW
MOVING WARM FRONT.  AS PREVIOUS SHIFT MENTIONED GFS MODEL LIKELY
LIFTS THE WARM FRONT TOO QUICKLY TO THE NORTH AND PREFER A SLOWER
MOVEMENT LIKE MOST OF THE MESOSCALE MODELS SHOW.  THE MODELS ARE IN
GOOD AGREEMENT THAT THE AXIS OF HEAVIEST RAIN IN OUR REGION WILL
FALL ACROSS NORTHWEST MA/SOUTHWEST NH.  HOWEVER...GIVEN ITS
CONVECTION AND UNCERTAINTY ON THE MOVEMENT OF THE WARM FRONT THAT IS
SUBJECT TO CHANGE.

TIMING:
TIMING AND AXIS OF HEAVIEST RAIN IS ALWAYS UNCERTAIN IN THESE TYPES
OF SETUPS.  EXPECT SHOWERS AND EMBEDDED THUNDERSTORMS TO INCREASE
IN AREAL COVERAGE AND INTENSITY LATE TONIGHT AND CONTINUE AT TIMES
INTO TUE ACROSS THE INTERIOR.  SOME ACTIVITY SHOULD MAKE IT ONTO THE
I-95 CORRIDOR AS WELL...ESPECIALLY DURING THE AFTERNOON IF SOME
HEATING/SURFACE INSTABILITY CAN DEVELOP.  SHOWERS AND THUNDERSTORMS
MAY PERSIST INTO TUE EVENING...BUT SHOULD BEGIN TO WIND DOWN
BY LATE TUE NIGHT AS DRIER MID LEVEL AIR WORKS INTO THE REGION.

HEAVY RAINFALL THREAT:
THE MAIN CONCERN WITH THIS ACTIVITY WILL BE HEAVY RAINFALL WHICH
MAY LEAD TO LOCALIZED FLOODING....AS PWATS ARE AROUND 2 INCHES.  THE
SREFS/GEFS ENSEMBLES DO SHOW SOME VERY LOW PROBABILITIES FOR OVER 2
INCHES OF RAINFALL IN 36 HOURS ACROSS OUR FAR NORTHWEST SECTIONS.
THIS MIGHT BE A SIGNAL FOR POSSIBLE TRAINING GIVEN THIS IS A
CONVECTIVE SITUATION.  WE ALSO HAVE NOTICED THAT THE ECMWF HAS
BEEN SHOWING SOME DECENT QPF ON ITS LAST COUPLE OF RUNS.  IT TENDS
TO BE CONSERVATIVE ON THAT...SO THAT MIGHT BE ANOTHER SIGNAL.  WITH
ALL THAT SAID...CONFIDENCE IS LOW BUT WOULDN/T BE SURPRISED TO SEE A
LOCALIZED FLASH FLOOD EVENT IN OUR NORTHWEST SECTIONS LATE TONIGHT
INTO TUE.  SOMETHING LATER SHIFTS WILL HAVE TO KEEP AN EYE ON.

SEVERE WEATHER POTENTIAL:
SEVERE WEATHER POTENTIAL IS RATHER LOW GIVEN LIMITED INSTABILITY/AN
ABUNDANCE OF CLOUDS AND POOR MID LEVEL LAPSE RATES.  HOWEVER...CAN/T
RULE OUT AN ISOLATED WET MICROBURST GIVEN 70+ DEWPOINTS IN PLACE.

&&

.LONG TERM /WEDNESDAY NIGHT THROUGH MONDAY/...
HEADLINES...

* AN ISOLATED SHOWER/STORM POSSIBLE WED ESPECIALLY SE.
* DRY AND SEASONABLE THU/FRI AND MOST OF SAT.
* SHOWERS/STORMS PROBABLE SUN.

DETAILS...
MODELS IN GENERAL AGREEMENT ON KEEPING TROUGH OVER EASTERN STATES
THROUGH MUCH OF PERIOD...RESULTING IN SOUTHERLY FLOW ALOFT OVER
NEW ENGLAND. EVENTUALLY CUTOFF LOW IS EXPECTED TO FORM NEAR UPPER
GREAT LAKES WHICH SHIFTS INTO ONTARIO EARLY NEXT WEEK. NET RESULT
FOR SOUTHERN NEW ENGLAND IS STRETCH OF SEASONABLY WARM WEATHER...
INTERSPERSED WITH PERIODS OF SHOWERS/STORMS AS SERIES OF FRONTS
PASS THROUGH REGION.

THAT SAID...THERE IS DISAGREEMENT FRI INTO SAT WITH REGARD TO
DEVELOPMENT OF COASTAL LOW AS PIECE OF SOUTHERN STREAM ENERGY
PUSHES OFF MID ATLANTIC COAST. 00Z ECMWF WAS LONE MODEL IN
SUPPORTING WETTER SOLUTION WHILE 12Z GFS/GGEM AND THEIR ENSEMBLES
CONTINUE TO SHOW RIDGING ACROSS NEW ENGLAND AS SYSTEM REMAINS
WELL TO OUR SE. 12Z ECMWF HAS TRENDED MORE TOWARD DRIER SOLUTION
WITH MOST OF RAINFALL WELL OFFSHORE...BUT IT DOES BRING SOME
LIGHTER RAINFALL TO SE NEW ENGLAND. BASED UPON MODEL CONSENSUS AND
WPC PREFERENCE...WE WILL MAINTAIN DRY FORECAST FOR FRI/SAT.

WEDNESDAY...
COLD FRONT WILL SLOWLY EXIT REGION DURING MORNING...BUT SHOULD
TAKE MOST OF DAY TO PASS OFF COAST. DESPITE DRYING ALOFT THERE IS
SUFFICIENT MOISTURE AND INSTABILITY TO RESULT IN ISOLATED SHOWERS
AND STORMS...MAINLY ACROSS RI AND SE MA. ANY ACTIVITY SHOULD
DIMINISH RAPIDLY WITH SUNSET.

DESPITE FRONT MOVING THROUGH...LOOKS TO BE WARM DAY ESPECIALLY IN
E MA/RI WHERE MODEL 2M TEMPERATURES REACH MID 80S. THIS COULD
EASILY SUPPORT 90 IF WE GET ENOUGH SUN...BUT FOR NOW BUMPED HIGHS
IN THESE AREAS TO UPPER 80S.

THURSDAY/FRIDAY...
AS MENTIONED ABOVE WE ARE FAVORING A DRIER SOLUTION AS HIGH
PRESSURE RIDGES INTO NEW ENGLAND...RESULTING IN NE FLOW ACROSS
REGION. SHOULD END UP BREEZY AROUND CAPE COD AND ISLANDS AS
SOUTHERN STREAM SYSTEM PASSES WELL OFFSHORE BUT CLOSE ENOUGH TO
TIGHTEN PRESSURE GRADIENT. LOOKS TO BE SEASONABLE DAY WITH HIGHS
IN 70S COAST/80S INLAND.

SATURDAY...
DRY WEATHER SHOULD PREVAIL MUCH OF DAY. APPROACHING COLD FRONT MAY
GENERATE SOME AFTERNOON SHOWERS/STORMS ACROSS INTERIOR WHERE WE
HAVE CHANCE POPS...BUT BETTER LIFT REMAINS TO OUR W UNTIL SAT
NIGHT AT EARLIEST.

SUNDAY...
LOOKS TO BE WETTER DAY OF WEEKEND AS COLD FRONT CROSSES SOUTHERN
NEW ENGLAND DURING AFTERNOON AND EVENING. AS IS TYPICALLY CASE
EXTENT OF SHOWERS/STORMS WILL DEPEND ON AMOUNT OF HEATING...
WHICH IS HIGHLY UNCERTAIN RIGHT NOW GIVEN ANY EFFECTS OF EARLIER
CONVECTION TO OUR W. CONTINUING WITH CHANCE POPS FOR SCATTERED
SHOWERS AND STORMS. SEVERE POTENTIAL EVEN LESS CERTAIN BUT RIGHT
NOW MODELS SEEM TO SHOW BEST INSTABILITY OVER SOUTHERN NEW ENGLAND
WELL AHEAD OF STRONGER 0-6KM SHEAR WHICH WOULD LIMIT THREAT.

MONDAY...
RETURN TO LESS HUMID WEATHER AS COLD FRONT MOVES OFF COAST IN
MORNING AND HIGH PRESSURE BUILDS INTO REGION.

&&

.AVIATION /06Z TUESDAY THROUGH SATURDAY/...
FORECASTER CONFIDENCE LEVELS...

LOW...LESS THAN 30 PERCENT.
MODERATE...30 TO 60 PERCENT.
HIGH...GREATER THAN 60 PERCENT.

SHORT TERM...MODERATE CONFIDENCE.

BEFORE 12Z...LIFR ACROSS THE EAST COASTAL SITES OVERNIGHT WITH
IFR/MVFR ACROSS ALL SITES WEST OF I-95 THANKS TO MARINE LOW CLOUDS
AND FOG. ISOLATED SHOWERS/STORMS IN W NEW ENGLAND EXPECTED TO
BECOME MORE NUMEROUS OVER THE NEXT SEVERAL HOURS.

TODAY AND TONIGHT...
MVFR/IFR CONDITIONS WILL CONTINUE INTO THE MORNING AS RAIN/TSRA
EXPANDS MORE EASTWARD IN COVERAGE AS WARM FRONT LIFTS NORTHWARD.
SOME VFR CONDITIONS MAKE SNEAK IN OUT WEST BUT HAVE LOWER
CONFIDENCE. EXPECT LOW CLOUDS AND FOG TO DOMINATE OUT EAST
THROUGH MOST OF THE DAY. COLD FRONTAL PASSAGE WILL SWITCH WINDS
AND BRING MORE RAIN/TSRA ACROSS THE AREA THROUGH THE AFTERNOON
INTO EVENING HOURS. CONDITIONS MAY START IMPROVING FROM WEST TO
EAST BY TONIGHT.

KBOS TERMINAL...MODERATE CONFIDENCE IN TAF. LIFR CONDITIONS
TONIGHT SLOWLY IMPROVE TO IFR/MVFR BY TOMORROW. LOW CONFIDENCE ON
POSSIBLE -TSRA THIS AFTERNOON.

KBDL TERMINAL...MODERATE CONFIDENCE IN TAF. MVFR WILL SLOWLY DROP
TO IFR CONDITIONS OVERNIGHT. IMPROVEMENT TO POSSIBLE VFR BY EARLY
AFTERNOON. MODERATE CONFIDENCE ON TSRA...BUT LOW CONFIDENCE ON
EXACT TIMING.

OUTLOOK...WEDNESDAY THROUGH SATURDAY...

WED...HIGH CONFIDENCE. VFR. ISOLD SHOWER/TSTM POSSIBLE RI/SE MA.

THU AND FRI...HIGH CONFIDENCE. VFR. SEA BREEZES LIKELY BOTH DAYS.

SAT...MODERATE CONFIDENCE. VFR. SCT PM SHOWERS/TSTMS MAINLY IN
WESTERN NEW ENGLAND.

&&

.MARINE...
FORECASTER CONFIDENCE LEVELS...

LOW...LESS THAN 30 PERCENT.
MODERATE...30 TO 60 PERCENT.
HIGH...GREATER THAN 60 PERCENT.

TONIGHT THROUGH TUESDAY NIGHT...MODERATE CONFIDENCE.

WINDS/SEAS WILL REMAIN BELOW SCA THRESHOLDS TONIGHT INTO TUE MORNING
WITH WEAK PRESSURE GRADIENT IN PLACE.  WE MAY SEE SOME SCA SEAS
DEVELOP TUE AFTERNOON AND NIGHT ACROSS THE SOUTHERN ATLANTIC
WATERS WITH PERSISTENT LONG SOUTHWEST FETCH AHEAD OF AN APPROACHING
COLD FRONT.  ITS UNCERTAIN HOW HIGH SEAS WILL GET WITH AN INVERSION
IN PLACE...SO LEFT THIS TO THE NEXT SHIFT TO DECIDE ON POSSIBLE
HEADLINES.  OTHER CONCERN WILL BE FOR AREAS OF FOG WHICH MAY BE
LOCALLY DENSE ACROSS SOME OF THE WATERS DURING THE
OVERNIGHT AND MORNING HOURS.

OUTLOOK...WEDNESDAY THROUGH SATURDAY...

WEDNESDAY...HIGH CONFIDENCE.
COLD FRONT PUSHES OFFSHORE DURING AFTERNOON/EVENING AND MAY
RESULT IN AN ISOLATED SHOWER/STORM NEAR SHORE. FRONT WILL BRING
GRADUAL WIND SHIFT TO W BUT WINDS/SEAS REMAIN BELOW SCA.

THURSDAY AND FRIDAY...HIGH CONFIDENCE.
HIGH PRESSURE BUILDS OVER NEW ENGLAND RESULTING IN NE FLOW WITH
LOCAL SEA BREEZES. GRADIENT MAY INCREASE THU AS LOW PRESSURE
PASSES WELL SE OF NEW ENGLAND...BUT WINDS SHOULD REMAIN BELOW
25KT. SEAS SHOULD STEADILY INCREASE ON S COASTAL WATERS HOWEVER
AND WILL PROBABLY REACH 5 OR 6 FT SE OF NANTUCKET THU BEFORE
GRADUALLY SUBSIDING FRI.

SATURDAY...MODERATE CONFIDENCE.
S/SE FLOW GETS UNDERWAY AND SHOULD VEER TO SW LATE AS COLD FRONT
PUSHES INTO UPSTATE NY. WINDS AND SEAS SHOULD REMAIN BELOW SCA.

&&

.TIDES/COASTAL FLOODING...
ASTRONOMICAL TIDES WILL BE ABNORMALLY HIGH DURING THE HIGH TIDE
CYCLE NEAR MIDNIGHT TONIGHT. BOS TIDE IS 12.1 FT WHICH IS ABOUT AS
HIGH AS IT EVER GETS. WITH LIGHT EASTERLY FLOW EXPECT ABOUT A 0.5
FT TIDAL DEPARTURE WHICH SHOULD BE ENOUGH TO PRODUCE POCKETS OF VERY
MINOR COASTAL FLOODING ACROSS THE MOST VULNERABLE LOCATIONS ACROSS E
COASTAL MA.  WENT AHEAD AND ISSUED A COASTAL FLOOD ADVISORY WITH
THE AFTERNOON PACKAGE.

&&

.BOX WATCHES/WARNINGS/ADVISORIES...
CT...NONE.
MA...COASTAL FLOOD ADVISORY UNTIL 2 AM EDT EARLY THIS MORNING FOR
     MAZ007-015-016-019.
NH...NONE.
RI...NONE.
MARINE...NONE.

&&

SYNOPSIS...FRANK/JWD
NEAR TERM...DUNTEN/JWD
SHORT TERM...FRANK
LONG TERM...JWD
AVIATION...DUNTEN/JWD
MARINE...FRANK/JWD
TIDES/COASTAL FLOODING...STAFF
Hazardous weather outlook, Jul 22, 3:52 PM EDT, 12 hours 20 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TAUNTON MA
352 PM EDT MON JUL 22 2013

MAZ007-015-016-019-232000-
EASTERN ESSEX MA-SUFFOLK MA-EASTERN NORFOLK MA-EASTERN PLYMOUTH MA-
352 PM EDT MON JUL 22 2013

...COASTAL FLOOD ADVISORY IN EFFECT FROM 10 PM THIS EVENING TO 2 AM
EDT TUESDAY...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR EASTERN
MASSACHUSETTS...NORTHEASTERN MASSACHUSETTS AND SOUTHEASTERN
MASSACHUSETTS.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE
INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS.

   COASTAL FLOOD ADVISORY.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

CTZ002>004-MAZ002>004-008>012-026-NHZ011-012-015-232000-
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-NORTHERN MIDDLESEX MA-CHESHIRE NH-
EASTERN HILLSBOROUGH NH-WESTERN AND CENTRAL HILLSBOROUGH NH-
352 PM EDT MON JUL 22 2013

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHERN
CONNECTICUT...CENTRAL MASSACHUSETTS...EASTERN
MASSACHUSETTS...WESTERN MASSACHUSETTS AND SOUTHERN NEW HAMPSHIRE.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

SHOWERS AND THUNDERSTORMS MAY PRODUCE TORRENTIAL RAINFALL TONIGHT
ACROSS SOUTHWEST NEW HAMPSHIRE...WESTERN AND CENTRAL
MASSACHUSETTS...AND NORTHERN CONNECTICUT. THERE IS THE POSSIBILITY
OF LOCALIZED FLASH FLOODING.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

MAZ005-006-013-014-017-018-020>024-RIZ001>008-232000-
CENTRAL MIDDLESEX MA-WESTERN ESSEX MA-WESTERN NORFOLK MA-
SOUTHEAST MIDDLESEX MA-NORTHERN BRISTOL MA-WESTERN 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-
BLOCK ISLAND RI-
352 PM EDT MON JUL 22 2013

THIS HAZARDOUS WEATHER OUTLOOK IS FOR EASTERN
MASSACHUSETTS...NORTHEASTERN MASSACHUSETTS...SOUTHEASTERN
MASSACHUSETTS...NORTHERN RHODE ISLAND AND SOUTHERN RHODE ISLAND.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

ANZ230>237-250-251-254>256-232000-
BOSTON HARBOR-CAPE COD BAY-NANTUCKET SOUND-VINEYARD SOUND-
BUZZARDS BAY-RHODE ISLAND SOUND-NARRAGANSETT BAY-BLOCK ISLAND SOUND-
COASTAL WATERS EAST OF IPSWICH BAY AND THE STELLWAGEN BANK NATIONAL
MARINE SANCTUARY-MASSACHUSETTS BAY AND IPSWICH BAY-
COASTAL WATERS FROM PROVINCETOWN MA TO CHATHAM MA TO NANTUCKET MA
OUT 20 NM-
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-
352 PM EDT MON JUL 22 2013

THIS HAZARDOUS WEATHER OUTLOOK IS FOR MASSACHUSETTS COASTAL WATERS
AND RHODE ISLAND COASTAL WATERS.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.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/US.NATIONALWEATHERSERVICE.BOSTON.GOV

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
Jul 23, 5:32 AM EDTAreal Flood AdvisoryBOXCapitol Planning Region3 hr
Jul 23, 7:03 AM EDTAreal Flood AdvisoryBOXNortheastern Connecticut Planning Region117 min
Jul 23, 5:45 PM EDTFlash Flood WarningBOXNortheastern Connecticut Planning Region90 min
Jul 23, 5:10 PM EDTSpecial Weather StatementBOXProvidence50 min
Jul 22, 10:31 PM EDTAreal Flood AdvisoryBOXFranklin, Hampshire3 hr
Jul 23, 1:14 AM EDTFlash Flood WarningBOXFranklin, Hampshire2 hr
Jul 23, 5:40 AM EDTAreal Flood AdvisoryBOXFranklin, Hampshire3 hr
Jul 23, 6:15 AM EDTFlash Flood WarningBOXFranklin2 hr
Jul 23, 6:47 AM EDTAreal Flood AdvisoryBOXFranklin, Worcester3 hr
Jul 23, 10:22 AM EDTAreal Flood AdvisoryBOXFranklin, Hampden, Hampshire, Worcester113 min
Jul 23, 11:37 AM EDTAreal Flood AdvisoryBOXMiddlesex, Worcester113 min
Jul 23, 12:43 PM EDTAreal Flood AdvisoryBOXEssex, Middlesex, Norfolk, Plymouth, Suffolk2 hr
Jul 23, 12:52 PM EDTSpecial Weather StatementBOXEssex38 min
Jul 23, 12:56 PM EDTFlash Flood WarningBOXMiddlesex, Norfolk, Suffolk2 hr
Jul 23, 1:12 PM EDTFlash Flood WarningBOXMiddlesex, Norfolk2 hr
Jul 23, 1:25 PM EDTSevere Thunderstorm WarningBOXNorfolk, Suffolk65 min
Jul 23, 1:26 PM EDTAreal Flood AdvisoryBOXEssex, Norfolk, Plymouth, Suffolk2 hr
Jul 23, 1:36 PM EDTSpecial Marine WarningBOX54 min
Jul 23, 1:40 PM EDTSpecial Weather StatementBOXEssex50 min
Jul 23, 2:31 PM EDTAreal Flood AdvisoryBOXHampden, Hampshire, Worcester119 min
Jul 23, 2:56 PM EDTSpecial Weather StatementBOXEssex, Middlesex, Worcester64 min
Jul 23, 3:13 PM EDTAreal Flood AdvisoryBOXEssex, Middlesex, Worcester2 hr
Jul 23, 3:34 PM EDTSpecial Weather StatementBOXEssex, Middlesex56 min
Jul 23, 3:38 PM EDTSevere Thunderstorm WarningBOXEssex, Middlesex, Suffolk52 min
Jul 23, 3:45 PM EDTSpecial Marine WarningBOX90 min
Jul 23, 3:58 PM EDTAreal Flood AdvisoryBOXEssex, Middlesex2 hr
Jul 23, 4:15 PM EDTAreal Flood AdvisoryBOXEssex, Middlesex, Norfolk, Plymouth, Suffolk, Worcester2 hr
Jul 23, 4:20 PM EDTSpecial Weather StatementBOXSuffolk40 min
Jul 23, 4:40 PM EDTFlash Flood WarningBOXEssex, Middlesex, Norfolk, Suffolk2 hr
Jul 23, 5:00 PM EDTFlash Flood WarningBOXBristol, Middlesex, Norfolk, Plymouth, Suffolk, Worcester2 hr
Jul 23, 3:05 AM EDTAreal Flood AdvisoryBOXCheshire, Hillsborough3 hr

Nearby

Flash Flood Watches in Massachusetts, 2013Flash Flood Watches in Rhode Island, 2013Flash Flood Watches in Connecticut, 2013Every flash flood watch in 2013

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.