Alert archive / Massachusetts / Flash Flood Watches in 2013

Flash Flood Watch 9, NWS Boston/Norton, MA

August 9, 20134 states

NWS Boston/Norton, MA issued this flash flood watch at Aug 9, 2013, 4:11 AM EDT for 4 states. It took effect at Aug 9, 2013, 8:00 AM EDT. It was in force for 11 hr.

The area

The counties it named.

The facts

Issued
Aug 9, 2013, 4:11 AM EDT (08:11 UTC)
In effect from
Aug 9, 2013, 8:00 AM EDT
Expired
Aug 9, 2013, 7:15 PM EDT
In force
11 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 08:10 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 2013-08-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 129 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 2013-08-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 76 square meters per square second.19395878Sfc1 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
129 J/kg
Mixed-layer CIN
-120 J/kg
Mixed-layer LCL
599 m above ground
0-6 km bulk shear
15 kt
0-1 km storm-relative helicity
76 m²/s²
0-3 km storm-relative helicity
66 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

192 
WGUS61 KBOX 090811
FFABOX

URGENT - IMMEDIATE BROADCAST REQUESTED
FLOOD WATCH
NATIONAL WEATHER SERVICE TAUNTON MA
411 AM EDT FRI AUG 9 2013

MAZ002>005-008>011-026-NHZ011-012-015-091600-
/O.NEW.KBOX.FF.A.0009.130809T1200Z-130809T2200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WESTERN FRANKLIN MA-EASTERN FRANKLIN MA-NORTHERN WORCESTER MA-
CENTRAL MIDDLESEX 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...CHARLEMONT...GREENFIELD...ORANGE...
BARRE...FITCHBURG...FRAMINGHAM...LOWELL...CHESTERFIELD...
BLANDFORD...AMHERST...NORTHAMPTON...SPRINGFIELD...AYER...
JAFFREY...KEENE...MANCHESTER...NASHUA...PETERBOROUGH...WEARE
411 AM EDT FRI AUG 9 2013

...FLASH FLOOD WATCH IN EFFECT FROM 8 AM EDT THIS MORNING THROUGH
THIS AFTERNOON...

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A

* FLASH FLOOD WATCH FOR PORTIONS OF MASSACHUSETTS AND SOUTHERN NEW
  HAMPSHIRE...INCLUDING THE FOLLOWING AREAS...IN MASSACHUSETTS...
  NORTHERN AND CENTRAL MIDDLESEX MA...NORTHERN WORCESTER
  MA...FRANKLIN MA...HAMPDEN MA AND HAMPSHIRE MA. IN SOUTHERN NEW
  HAMPSHIRE...CHESHIRE NH...HILLSBOROUGH NH.

* FROM 8 AM EDT THIS MORNING THROUGH THIS AFTERNOON.

* A COLD FRONT WILL SLOWLY MOVE ACROSS THE WATCH AREA THIS
  AFTERNOON AND EVENING...WITH VERY WARM AND HUMID AIR IN PLACE
  AHEAD OF IT. SHOWERS AND THUNDERSTORMS WILL DEVELOP AND PUSH
  ACROSS THE REGION TODAY INTO EARLY TONIGHT. SOME OF THE SHOWERS
  AND STORMS MAY PRODUCE VERY HEAVY RAIN. RAINFALL AMOUNTS WILL
  AVERAGE BETWEEN 1 AND 3 INCHES. SOME LOCALIZED AMOUNTS MAY REACH
  UP TO 4 INCHES...WHICH WILL LIKELY CAUSE FLASH FLOODING. 

* AREAS PRONE TO QUICKLY RISING WATER SUCH AS URBAN AND POOR
  DRAINAGE AREAS AS WELL AS FAST RISING SMALL STREAMS...MAY BE
  VULNERABLE TO FLASH FLOODING THIS AFTERNOON AND EVENING
  ESPECIALLY IF BANDS OF HEAVY RAINFALL SET UP IN THOSE 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.

&&

$$
5 follow-up statements
859 
WGUS61 KBOX 091228
FFABOX

URGENT - IMMEDIATE BROADCAST REQUESTED
FLOOD WATCH
NATIONAL WEATHER SERVICE TAUNTON MA
828 AM EDT FRI AUG 9 2013

CTZ002>004-MAZ012-092030-
/O.EXA.KBOX.FF.A.0009.000000T0000Z-130809T2200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
HARTFORD CT-TOLLAND CT-WINDHAM CT-SOUTHERN WORCESTER MA-
INCLUDING THE CITIES OF...HARTFORD...WINDSOR LOCKS...UNION...
VERNON...PUTNAM...WILLIMANTIC...MILFORD...WORCESTER
828 AM EDT FRI AUG 9 2013

...FLASH FLOOD WATCH IN EFFECT UNTIL 6 PM EDT THIS EVENING...

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS EXPANDED THE

* FLASH FLOOD WATCH TO INCLUDE PORTIONS OF NORTHERN CONNECTICUT
  AND CENTRAL MASSACHUSETTS...INCLUDING THE FOLLOWING AREAS...IN
  NORTHERN CONNECTICUT...HARTFORD...TOLLAND AND WINDHAM
  COUNTIES...IN CENTRAL MASSACHUSETTS...SOUTHERN WORCESTER COUNTY.

* UNTIL 6 PM EDT THIS EVENING. 

* A COLD FRONT WILL SLOWLY MOVE ACROSS THE WATCH AREA THIS
  AFTERNOON AND EVENING...WITH VERY WARM AND HUMID AIR IN PLACE
  AHEAD OF IT. SHOWERS AND THUNDERSTORMS WILL DEVELOP AND PUSH
  ACROSS THE REGION TODAY INTO EARLY TONIGHT. SOME OF THE SHOWERS
  AND STORMS MAY PRODUCE VERY HEAVY RAIN. RAINFALL AMOUNTS WILL
  AVERAGE BETWEEN 1 AND 3 INCHES. SOME LOCALIZED AMOUNTS MAY REACH
  UP TO 4 INCHES...WHICH WILL LIKELY CAUSE FLASH FLOODING.

* AREAS PRONE TO QUICKLY RISING WATER SUCH AS URBAN AND POOR
  DRAINAGE AREAS AS WELL AS FAST RISING SMALL STREAMS MAY BE
  VULNERABLE TO FLASH FLOODING THIS AFTERNOON AND EVENING
  ESPECIALLY IF BANDS OF HEAVY RAINFALL SET UP IN THOSE 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.

&&

$$

MAZ002>005-008>011-026-NHZ011-012-015-092030-
/O.CON.KBOX.FF.A.0009.000000T0000Z-130809T2200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WESTERN FRANKLIN MA-EASTERN FRANKLIN MA-NORTHERN WORCESTER MA-
CENTRAL MIDDLESEX 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...CHARLEMONT...GREENFIELD...ORANGE...
BARRE...FITCHBURG...FRAMINGHAM...LOWELL...CHESTERFIELD...
BLANDFORD...AMHERST...NORTHAMPTON...SPRINGFIELD...AYER...
JAFFREY...KEENE...MANCHESTER...NASHUA...PETERBOROUGH...WEARE
828 AM EDT FRI AUG 9 2013

...FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL 6 PM EDT THIS
EVENING...

THE FLASH FLOOD WATCH CONTINUES FOR

* PORTIONS OF MASSACHUSETTS AND SOUTHERN NEW HAMPSHIRE...INCLUDING
  THE FOLLOWING AREAS...IN MASSACHUSETTS...NORTHERN AND CENTRAL
  MIDDLESEX...FRANKLIN...HAMPDEN...HAMPSHIRE...AND NORTHERN
  WORCESTER COUNTIES. IN SOUTHERN NEW HAMPSHIRE...CHESHIRE AND
  HILLSBOROUGH COUNTIES

* UNTIL 6 PM EDT THIS EVENING.

* A COLD FRONT WILL SLOWLY MOVE ACROSS THE WATCH AREA THIS 
  AFTERNOON AND EVENING...WITH VERY WARM AND HUMID AIR IN PLACE 
  AHEAD OF IT. SHOWERS AND THUNDERSTORMS WILL DEVELOP AND PUSH 
  ACROSS THE REGION TODAY INTO EARLY TONIGHT. SOME OF THE 
  SHOWERS AND STORMS MAY PRODUCE VERY HEAVY RAIN. RAINFALL 
  AMOUNTS WILL AVERAGE BETWEEN 1 AND 3 INCHES. SOME LOCALIZED 
  AMOUNTS MAY REACH UP TO 4 INCHES...WHICH WILL LIKELY CAUSE 
  FLASH FLOODING. 

* AREAS PRONE TO QUICKLY RISING WATER SUCH AS URBAN AND POOR 
  DRAINAGE AREAS AS WELL AS FAST RISING SMALL STREAMS...MAY BE 
  VULNERABLE TO FLASH FLOODING THIS AFTERNOON AND EVENING 
  ESPECIALLY IF BANDS OF HEAVY RAINFALL SET UP IN THOSE 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.

&&

$$

SIPPRELL
447 
WGUS61 KBOX 091504
FFABOX

URGENT - IMMEDIATE BROADCAST REQUESTED
FLOOD WATCH
NATIONAL WEATHER SERVICE TAUNTON MA
1104 AM EDT FRI AUG 9 2013

CTZ002>004-MAZ002>005-008>012-026-NHZ011-012-015-092315-
/O.EXT.KBOX.FF.A.0009.000000T0000Z-130810T0100Z/
/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 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-
INCLUDING THE CITIES OF...HARTFORD...WINDSOR LOCKS...UNION...
VERNON...PUTNAM...WILLIMANTIC...CHARLEMONT...GREENFIELD...
ORANGE...BARRE...FITCHBURG...FRAMINGHAM...LOWELL...CHESTERFIELD...
BLANDFORD...AMHERST...NORTHAMPTON...SPRINGFIELD...MILFORD...
WORCESTER...AYER...JAFFREY...KEENE...MANCHESTER...NASHUA...
PETERBOROUGH...WEARE
1104 AM EDT FRI AUG 9 2013

...FLASH FLOOD WATCH NOW IN EFFECT UNTIL 9 PM EDT THIS EVENING...

THE FLASH FLOOD WATCH IS NOW IN EFFECT FOR

* PORTIONS SOUTHERN NEW ENGLAND...INCLUDING THE FOLLOWING AREAS...
  IN NORTHERN CONNECTICUT...HARTFORD...TOLLAND AND WINDHAM
  COUNTIES. IN MASSACHUSETTS...NORTHERN AND CENTRAL MIDDLESEX...
  FRANKLIN...HAMPDEN...HAMPSHIRE...AND WORCESTER COUNTIES. IN
  SOUTHERN NEW HAMPSHIRE...CHESHIRE AND HILLSBOROUGH COUNTIES

* UNTIL 9 PM EDT THIS EVENING.

* WIDESPREAD RAIN WITH EMBEDDED HEAVIER SHOWERS AND THUNDERSTORMS
  WILL IMPACT THE REGION INTO TONIGHT. FLASH FLOODING WILL BE A
  DISTINCT POSSIBILITY AS SOME OF THE SHOWERS AND STORMS MAY
  PRODUCE ONE-HOUR RAINFALL AMOUNTS IN EXCESS OF 1 INCH. STORM
  TOTAL RAINFALL AMOUNTS WILL AVERAGE BETWEEN 1 AND 3 INCHES...
  WITH LOCALIZED AMOUNTS REACHING UP TO 4 INCHES.

* AREAS PRONE TO QUICKLY RISING WATER SUCH AS URBAN AND POOR 
  DRAINAGE AREAS AS WELL AS FAST RISING SMALL STREAMS...MAY BE 
  VULNERABLE TO FLASH FLOODING THIS AFTERNOON AND EVENING 
  ESPECIALLY IF BANDS OF HEAVY RAINFALL SET UP IN THOSE 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.

&&

$$

SIPPRELL
698 
WGUS61 KBOX 091531
FFABOX

URGENT - IMMEDIATE BROADCAST REQUESTED
FLOOD WATCH
NATIONAL WEATHER SERVICE TAUNTON MA
1131 AM EDT FRI AUG 9 2013

MAZ006-007-013>021-RIZ001>007-092345-
/O.EXA.KBOX.FF.A.0009.000000T0000Z-130810T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
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-NORTHWEST PROVIDENCE RI-
SOUTHEAST PROVIDENCE RI-WESTERN KENT RI-EASTERN KENT RI-
BRISTOL RI-WASHINGTON RI-NEWPORT RI-
INCLUDING THE CITIES OF...LAWRENCE...GLOUCESTER...FOXBORO...
NORWOOD...CAMBRIDGE...BOSTON...QUINCY...TAUNTON...BROCKTON...
PLYMOUTH...FALL RIVER...NEW BEDFORD...MATTAPOISETT...FOSTER...
SMITHFIELD...PROVIDENCE...WEST GREENWICH...WARWICK...BRISTOL...
NARRAGANSETT...WESTERLY...NEWPORT
1131 AM EDT FRI AUG 9 2013

...FLASH FLOOD WATCH IN EFFECT UNTIL 9 PM EDT THIS EVENING...

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS EXPANDED THE

* FLASH FLOOD WATCH TO INCLUDE PORTIONS OF EASTERN AND
  SOUTHEASTERN MASSACHUSETTS...AS WELL AS ALL OF RHODE ISLAND

* UNTIL 9 PM EDT THIS EVENING.

* WIDESPREAD RAIN WITH EMBEDDED HEAVIER SHOWERS AND THUNDERSTORMS
  WILL IMPACT THE REGION INTO TONIGHT. FLASH FLOODING WILL BE A
  DISTINCT POSSIBILITY AS SOME OF THE SHOWERS AND STORMS MAY
  PRODUCE ONE-HOUR RAINFALL AMOUNTS IN EXCESS OF 1 INCH. STORM
  TOTAL RAINFALL AMOUNTS WILL AVERAGE BETWEEN 1 AND 3 INCHES...WITH
  LOCALIZED AMOUNTS REACHING UP TO 4 INCHES.

* AREAS PRONE TO QUICKLY RISING WATER SUCH AS URBAN AND POOR 
  DRAINAGE AREAS AS WELL AS FAST RISING SMALL STREAMS...MAY BE 
  VULNERABLE TO FLASH FLOODING THIS AFTERNOON AND EVENING 
  ESPECIALLY IF BANDS OF HEAVY RAINFALL SET UP IN THOSE 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.

&&

$$

CTZ002>004-MAZ002>005-008>012-026-NHZ011-012-015-092345-
/O.CON.KBOX.FF.A.0009.000000T0000Z-130810T0100Z/
/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 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-
INCLUDING THE CITIES OF...HARTFORD...WINDSOR LOCKS...UNION...
VERNON...PUTNAM...WILLIMANTIC...CHARLEMONT...GREENFIELD...
ORANGE...BARRE...FITCHBURG...FRAMINGHAM...LOWELL...CHESTERFIELD...
BLANDFORD...AMHERST...NORTHAMPTON...SPRINGFIELD...MILFORD...
WORCESTER...AYER...JAFFREY...KEENE...MANCHESTER...NASHUA...
PETERBOROUGH...WEARE
1131 AM EDT FRI AUG 9 2013

...FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL 9 PM EDT THIS
EVENING...

THE FLASH FLOOD WATCH CONTINUES FOR

* PORTIONS OF NORTHERN CONNECTICUT...WESTERN AND CENTRAL
  MASSACHUSETTS...AS WELL AS SOUTHERN NEW HAMPSHIRE

* UNTIL 9 PM EDT THIS EVENING.

* WIDESPREAD RAIN WITH EMBEDDED HEAVIER SHOWERS AND THUNDERSTORMS
  WILL IMPACT THE REGION INTO TONIGHT. FLASH FLOODING WILL BE A
  DISTINCT POSSIBILITY AS SOME OF THE SHOWERS AND STORMS MAY
  PRODUCE ONE-HOUR RAINFALL AMOUNTS IN EXCESS OF 1 INCH. STORM
  TOTAL RAINFALL AMOUNTS WILL AVERAGE BETWEEN 1 AND 3 INCHES...WITH
  LOCALIZED AMOUNTS REACHING UP TO 4 INCHES.

* AREAS PRONE TO QUICKLY RISING WATER SUCH AS URBAN AND POOR 
  DRAINAGE AREAS AS WELL AS FAST RISING SMALL STREAMS...MAY BE 
  VULNERABLE TO FLASH FLOODING THIS AFTERNOON AND EVENING 
  ESPECIALLY IF BANDS OF HEAVY RAINFALL SET UP IN THOSE 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.

&&

$$

SIPPRELL
262 
WGUS61 KBOX 091955
FFABOX

FLOOD WATCH
NATIONAL WEATHER SERVICE TAUNTON MA
355 PM EDT FRI AUG 9 2013

CTZ002>004-MAZ002>021-026-NHZ011-012-015-RIZ001>007-100100-
/O.CON.KBOX.FF.A.0009.000000T0000Z-130810T0100Z/
/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
355 PM EDT FRI AUG 9 2013

...FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL 9 PM EDT THIS
EVENING...

THE FLASH FLOOD WATCH CONTINUES FOR

* PORTIONS OF NORTHERN CONNECTICUT...MASSACHUSETTS EXCLUDING THE
  CAPE AND ISLANDS...SOUTHERN NEW HAMPSHIRE AND ALL OF RHODE
  ISLAND

* UNTIL 9 PM EDT THIS EVENING.

* WIDESPREAD RAIN WITH EMBEDDED HEAVIER SHOWERS AND THUNDERSTORMS
  WILL CONTINUE ACROSS THE REGION INTO TONIGHT. FLASH FLOODING
  WILL BE A DISTINCT POSSIBILITY AS SOME OF THE SHOWERS AND STORMS
  WILL PRODUCE ONE-HOUR RAINFALL AMOUNTS IN EXCESS OF 1 INCH.
  STORM TOTAL RAINFALL AMOUNTS WILL AVERAGE AROUND 2 AND 4
  INCHES...WITH LOCALIZED AMOUNTS REACHING UP TO 5 INCHES.

* AREAS PRONE TO QUICKLY RISING WATER SUCH AS URBAN AND POOR 
  DRAINAGE AREAS AS WELL AS FAST RISING SMALL STREAMS...MAY BE 
  VULNERABLE TO FLASH FLOODING THIS AFTERNOON AND EVENING 
  ESPECIALLY IF BANDS OF HEAVY RAINFALL SET UP IN THOSE 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.

&&

$$

SIPPRELL
990 
WGUS61 KBOX 092315
FFABOX

FLOOD WATCH
NATIONAL WEATHER SERVICE TAUNTON MA
715 PM EDT FRI AUG 9 2013

CTZ002>004-MAZ002>021-026-NHZ011-012-015-RIZ001>007-100015-
/O.CAN.KBOX.FF.A.0009.000000T0000Z-130810T0100Z/
/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
715 PM EDT FRI AUG 9 2013

...FLASH FLOOD WATCH IS CANCELLED...

THE FLASH FLOOD WATCH FOR PORTIONS OF NORTHERN CONNECTICUT...
MASSACHUSETTS...SOUTHERN NEW HAMPSHIRE AND RHODE ISLAND HAS BEEN
CANCELLED. SCATTERED LIGHT TO MODERATE RAIN SHOWERS WILL MOVE
ACROSS PORTIONS OF SOUTHERN NEW ENGLAND THIS EVENING. THE RAINFALL
FROM THESE SHOWERS IS NO LONGER EXPECTED TO POSE A THREAT OF
ADDITIONAL FLASH FLOODING.

$$

BELK/NMB

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 Aug 9, 4:02 AM EDT, 9 minutes earlier.

Area forecast discussion, Aug 9, 4:02 AM EDT, 9 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TAUNTON MA
402 AM EDT FRI AUG 9 2013

.SYNOPSIS...
THERE IS THE POTENTIAL FOR PERIODS OF HEAVY RAIN TODAY WHICH MAY
LEAD TO BRIEF FLOODING FOR PARTS OF SOUTHERN NEW ENGLAND. WET
WEATHER WILL EXIT OFFSHORE AS A COLD FRONT SWEEPS ACROSS THE
REGION TONIGHT. HIGH PRESSURE BUILDS INTO SOUTHERN NEW ENGLAND
THIS WEEKEND WITH DRY/PLEASANT/SEASONABLE TEMPERATURES. ANOTHER
COLD FRONT MAY BRING A FEW SHOWERS/THUNDERSTORMS TO THE REGION
TUESDAY AND TUESDAY NIGHT...BUT A WASHOUT IS NOT EXPECTED. DRY
WEATHER RETURNS FOR WEDNESDAY AND THURSDAY.

&&

.NEAR TERM /UNTIL 6 PM THIS EVENING/...
150 AM UPDATE...
EASTERN EDGE OF PRECIP ACROSS E MA/E PA INTO N NJ EVER SO SLOWLY
CREEPING E OVER THE LAST FEW HOURS...THOUGH THAT PRECIP IS STILL
TENDING TO WEAKEN AS IT SHIFTS INTO THE REGION. CLOUDS ARE
LOWERING BUT NOT MUCH FOG TO SPEAK OF ACROSS THE REGION AT 05Z.
HAVE BACKED OFF CHANCE-LIKELY POPS A LITTLE LATER...MORE TOWARD
08Z OR SO ACROSS WESTERN AREAS.

REMAINDER OF GRIDS UPDATED TO BRING CONDITIONS CURRENT.

PREVIOUS DISCUSSION...
THE MAIN CHANGE TO THE FORECAST WAS TO REDUCE POPS FOR THE FIRST
PART OF THE NIGHT. SHOWERS AND THUNDERSTORMS HAVE DEVELOPED ACROSS
NEW YORK STATE AND PA...BUT WERE STRUGGLING TO MOVE EAST. SPC
MESO-ANALYSIS SHOWING MLCAPE VALUE OF 1000 TO 1500 J/KG ALONG
WITH 0 TO 6 KM SHEAR OF 25 TO 30 KNOTS ACROSS THE REGION.
HOWEVER...MID LEVEL LAPSE RATES ARE POOR AND THERE IS NOT MUCH OF
A MECHANISM TO TRIGGER CONVECTION. MAY SEE A SPOT SHOWER OR
THUNDERSTORM THIS EVENING ACROSS OUR INTERIOR ZONES...BUT DON/T
SEE MUCH MORE THAN THAT. THEREFORE...EXPECT THE FIRST PART OF THE
NIGHT TO FEATURE MAINLY DRY WEATHER. SHOULD SEE THE THREAT FOR
SHOWERS AND A FEW EMBEDDED THUNDERSTORMS INCREASE WELL AFTER
MIDNIGHT ESPECIALLY ACROSS THE INTERIOR. SEE PREVIOUS DISCUSSION
BELOW:

DIFFLUENCE INCREASING ALOFT ASSOCIATED WITH THE JET STREAK
ROTATING AROUND THE DEEP LOW OVER THE SOUTHERN HUDSON BAY REGION
AFTER 07Z. CONTINUED TROPICAL SOUTHWEST MOIST FLOW WITHIN THE
LOW TO MID LEVELS IN RESPONSE...AIDED BY A LOW-LEVEL JET AROUND
H85. THE TWO AIR STREAMS WILL LIKELY COMBINE IN REGIONS LEADING TO
LOCALIZED AREAS OF CONVERGENCE...DEEP LAYER ASCENT...AND POCKETS
OF HEAVY RAIN. BIG QUESTION IS WHERE THIS CONVERGENCE WILL SET UP.
AT 05Z...LOOKS LIKE IT MAY BE A BIT FURTHER N THAN PREVIOUS
THINKING. ANOTHER REASON TO BACK OFF ON PRECIP THREAT OVERNIGHT.

&&

.SHORT TERM /6 PM THIS EVENING THROUGH 6 AM SATURDAY/...
TODAY...

MAIN PACIFIC ENERGY ROTATES THROUGH THE LONGWAVE FLOW AROUND THE
HUDSON BAY REGION LOW. ENHANCED ASCENT BENEATH THE STRONG DIFFLUENCE
ALOFT WILL PROVIDE AN ENVIRONMENT OF DEEP-LAYER ASCENT...ESPECIALLY
BENEATH AREAS OF CONVERGENCE OF THE SOUTHWEST H85 TROPICAL MOISTURE
TRANSPORT OVER NEW ENGLAND. STILL UNCERTAIN ON WHERE HEAVY RAIN
THREATS WILL MATERIALIZE...SHOULD BE MAINLY ACROSS NEW ENGLAND
DURING THIS TIME...IT JUST REMAINS DIFFICULT TO PINPOINT EXACTLY
WHERE...BUT NEVERTHELESS FEEL AREAS COULD SEE UP TO 1 INCH IN A
SHORT PERIOD OF TIME AHEAD OF THE AFOREMENTIONED COLD FRONT.
AGAIN...NOT GOING TO GO WITH ANY FLOOD HEADLINES...BUT CAN NOT
RULE OUT NUISANCE FLOODING.

H925-85 WINDS WILL ENHANCE UP TO 40 KTS AHEAD OF THE CONTINUED
SLOWLY APPROACHING COLD FRONT...ESPECIALLY THROUGH CENTRAL AND
EASTERN NEW ENGLAND. MODEL FORECAST HODOGRAPH PROFILES EXHIBIT SOME
INCREDIBLE TURNING WITHIN 0-3 KM. BUT CONSIDERING LAPSE RATES CLOSE
TO 5 C/KM...AND INSTABILITY POTENTIALLY LACKING WITH CONSIDERABLE
CLOUD COVER...AM NOT CERTAIN WITH GUSTY TO DAMAGING WIND THREATS...
EVEN THE POSSIBILITY OF A BRIEF SPIN UP TORNADO. WORTH MENTIONING
AND WATCHING OUT FOR NEVERTHELESS

PWATS REMAIN IN EXCESS OF 2 INCHES. WILL NOT MENTION GUSTY WINDS IN
THE FORECAST BUT WILL CONTINUE THE HEAVY RAIN THREAT FOR THOSE AREAS
WITH LIKELY POPS.

TONIGHT...

STRONG VORTMAX ROTATES THROUGH THE HUDSON BAY LOW ACTING AS A KICKER
AS COOLER AND DRIER AIR PUSHES INTO THE NORTHEASTERN CONUS FROM THE
REAR. WILL SEE THE SURFACE COLD FRONT PUSH SOUTH AND EAST TO THE NEW
ENGLAND SHORELINE BY SATURDAY MORNING IN RESPONSE. WILL SEE THE BULK
OF THE HEAVY RAIN DIMINISH /LESSER FLOOD THREAT AS BETTER DYNAMICS
PUSH NORTH AND WEST/ AS THE LAST OF THE SHOWERS AND ISOLATED
THUNDERSTORMS PUSH OFFSHORE...BEST POP CHANCES WILL BE ACROSS
SOUTHERN AND EASTERN PORTIONS OF NEW ENGLAND.

&&

.LONG TERM /SATURDAY THROUGH THURSDAY/...

BIG PICTURE/PREFERENCES... SUBTROPICAL RIDGE HOLDS ACROSS THE
SOUTHERN USA AND BUILDS OVER THE ROCKIES INTO WESTERN CANADA.
CLOSED UPPER LOW RIDES THROUGH EASTERN CANADA.  A SHORTWAVE DRIVES
SOUTH FROM THE CANADIAN ARCTIC AND GRABS THE OTHER LOW...FORMING A
CLOSED CIRCULATION THAT ROTATES AROUND NORTHERN QUEBEC. THE RIDGE
WEST/TROUGH EAST PATTERN MAINTAINS THROUGH MOST OF NEXT WEEK.

THE ECMWF DIGS A LITTLE DEEPER AND FARTHER SOUTH WITH THE SECOND
SHORTWAVE THAN DOES THE GFS.  IT IS ALSO A LITTLE SLOWER WITH THE
PASSAGE OF ITS ASSOCIATED SURFACE COLD FRONT TUESDAY/TUESDAY NIGHT.
THERMAL FIELDS ALOFT ARE A COUPLE OF DEGREES COOLER ON THE ECMWF VS
THE GFS THIS WEEKEND...AND EVEN A LITTLE MORE COOLER MID TO LATE
WEEK NEXT WEEK.

OUR MAIN PREFERENCE WAS HPC/WPC GRIDS WHERE AVAILABLE...A BLEND OF
ECMWF/GFS GRIDS OTHERWISE.

THE DAILIES...

SATURDAY THROUGH MONDAY... AS THE CLOSED LOW PASSES TO OUR NORTH
ACROSS CANADA...IT DRIVES A COLD FRONT OFFSHORE EARLY SATURDAY.  BY
SUNRISE WE EXPECT THIS TO BE MOVING OFFSHORE BUT COULD STILL BE
CLOSE ENOUGH FOR A LINGERING SHOWER OR TSTM ON THE CAPE AND ISLANDS.
OTHERWISE THE TREND FOR SATURDAY WILL BE CLEARING WITH DECREASING
DEWPOINTS.  MOS WAS A TAD LIGHT ON POST FRONTAL WINDS...LAPSE RATES
SHOW MIXING REACHING UP INTO 20 KNOT NORTHWESTERS AND 25 KNOTS WOULD
NOT BE A SURPRISE. WE ADJUSTED GUST VALUES ACCORDINGLY.

HIGH PRESSURE FROM THE MIDWEST BUILDS IN FOR SUNDAY AND MONDAY.
EXPECT DRY WEATHER. MOISTURE FIELDS DO SUGGEST SOME CLOUDS PART OF
THE TIME BUT NO PRECIPITATION.  THE GFS SHOWS MIXING REACHING TO 850
MB EACH DAY...BUT THE MODEL TENDS TO UNDERFORECAST THE ACTUAL DEPTH.
THE NAM MIXES TO 825 MB SATURDAY AND 850 MB SUNDAY.  WE ASSUMED
MIXING TO 800 MB INLAND WHERE TEMPS ARE 8C SAT AND SUN...AND 10C
MONDAY.  SO MAX TEMPS SHOULD REACH THE LOW TO MID 80S INLAND.  LIGHT
FLOW WILL ALLOW SEABREEZES TO DEVELOP SUNDAY.  NOT SURE ABOUT MONDAY.

TUESDAY... THE SHORTWAVE FROM THE FAR NORTH SWINGS EAST ACROSS
CANADA ON TUESDAY. THE GFS HAS THIS BRINGING A SURFACE COLD FRONT
THROUGH NEW ENGLAND TUESDAY AFTERNOON/EVENING. THE ECMWF...BEING
DEEPER ALOFT...IS ALSO SLOWER BRINGING THE COLD FRONT ACROSS NEW
ENGLAND WITH TIMING MORE LIKE TUESDAY NIGHT.  EITHER WAY...THE FRONT
HAS UPPER SUPPORT FROM THE RIGHT ENTRANCE REGION OF A 95 KNOT JET.
PRECIP WATER VALUES JUMP BACK TO AROUND 1.5 INCHES. PUT IT
TOGETHER...EXPECT A CHANCE OF SHOWERS WITH THE FROPA.

WEDNESDAY-THURSDAY... HIGH PRESSURE BUILDS OVER THE REGION WITH A
RETURN TO DRY AIR AND NO PRECIP. THE UPPER TROUGH WILL MEAN COOLER
TEMPS ALOFT...THE ECMWF HAS 850 TEMPS 10C WEDNESDAY AND 7C THURSDAY.
SEASONABLE TO SEASONABLY COOL TEMPS WITH HIGHS MAINLY IN THE 70S AND
LOWS IN THE 50S...POSSIBLY A FEW HIGH 40S.

&&

.AVIATION /08Z FRIDAY THROUGH TUESDAY/...
FORECASTER CONFIDENCE LEVELS...

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

OVERVIEW /THROUGH TONIGHT/...MODERATE CONFIDENCE.

THROUGH 12Z...MAINLY MVFR-IFR CIGS ACROSS CT VALLEY INTO CENTRAL
MA/N CT/RI AND S COASTAL AREAS...AND VFR BECOMING MVFR-IFR
REMAINDER OF REGION BY 07Z-08Z. VSBYS REMAIN VFR...THOUGH MAY SEE
POCKETS OF MVFR WITH PATCHY FOG AROUND OR AFTER 08Z.

TODAY...MAINLY MVFR-IFR CIGS. LOCAL MVFR VSBYS IN PATCHY FOG.
WIDESPREAD RAIN WITH EMBEDDED HEAVIER SHOWERS AND POSSIBLE TSRA.
LIKELY TEMPO IFR-MVFR VSBYS WITH +RA/TSRA. THINKING CIGS AROUND
MVFR. WILL SEE CONTINUED GUSTY S/SW FLOW.

GRADUAL CLEARING TREND TONIGHT WITH COLD FRONTAL PASSAGE. WINDS
BACKING OUT OF THE W/NW WITH IMPROVEMENT TO VFR.

KBOS TERMINAL...MODERATE CONFIDENCE. WILL KEEP TERMINAL DRY
INTO MID MORNING.

KBDL TERMINAL...MODERATE CONFIDENCE IN TAF.

OUTLOOK...SATURDAY THROUGH TUESDAY...

SATURDAY...LINGERING MVFR VSBYS CAPE AND ISLANDS AT SUNRISE. MOST
AREAS SHOULD BE VFR AND THE TREND IN ANY CASE WILL BE IN THAT
DIRECTION.  NORTHWEST WINDS WILL BECOME GUSTY WITH 20-KNOTS EXPECTED
AND 25 KNOTS NOT OUT OF THE QUESTION. THE STRONGER GUSTS WILL BE
MAINLY AFTERNOON AND THEN DIMINISH IN THE EVENING.

SUNDAY-MONDAY...VFR WITH LIGHT WINDS.  SEA BREEZES ALONG THE COAST
WITH DAYTIME WIND SHIFTS TO SOUTHEAST AT BOSTON AND POSSIBLY
PROVIDENCE. PATCHY LOW VSBYS IN EARLY MORNING FOG EACH DAY.

TUESDAY...COLD FRONT MOVES THROUGH DURING AFTERNOON OR EARLY NIGHT.
THIS MAY BRING SCATTERED SHOWERS/TSTMS WITH BRIEFLY LOWER CIGS AND
VSBYS. OTHERWISE VFR.

&&

.MARINE...
FORECASTER CONFIDENCE LEVELS...

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

OVERVIEW /THROUGH FRIDAY NIGHT/...MODERATE CONFIDENCE.

WITH APPROACHING COLD FRONT...WILL SEE AN INCREASE IN SW FLOW
WITH GUSTS EXCEEDING 25 KTS. PROLONGED FETCH WILL RESULT IN SEAS
UP TO 7-8 FEET...ESPECIALLY ACROSS THE SOUTHERN WATERS. INCREASING
RAINS AND ISOLATED THUNDERSTORMS ACROSS THE WATERS WILL RESULT IN
REDUCED VISIBILITIES AT TIMES. COULD ALSO SEE SOME PATCHY FOG AT
TIMES. STORMS MAY YIELD THE POTENTIAL OF GALE FORCE WINDS.

OUTLOOK...SATURDAY THROUGH TUESDAY...MODERATE CONFIDENCE.

SATURDAY...LINGERING ROUGH SEAS ON THE SOUTHERN OUTER WATERS DURING
THE MORNING...BUT SEAS WILL DIMINISH IN THE AFTERNOON.  NORTHWEST
WINDS GUSTING AROUND 20 KNOTS IN THE AFTERNOON ESPECIALLY AROUND
MASSACHUSETTS BAY.

SUNDAY AND MONDAY...WINDS AND SEAS SHOULD BE BELOW SMALL CRAFT
LEVELS.

TUESDAY...A COLD FRONT APPROACHES NEW ENGLAND AND MAY BRING A SHOWER
OR TSTM TO THE WATERS IN THE AFTERNOON.  SOUTHWEST WINDS PICK UP A
LITTLE BUT SHOULD STAY BELOW 25 KNOTS. SEAS REMAIN BELOW 5 FEET.

&&

.HYDROLOGY...
MOISTURE WILL BUILD NORTHWARD INTO NEW ENGLAND OUT OF THE TROPICS
ALONG AND AHEAD OF A COLD FRONT TODAY. SUBSEQUENTLY A HEAVY RAIN
THREAT WILL EXIST WHICH COULD LEAD RAINFALL AMOUNTS IN EXCESS OF 1
INCH...WITH LOCALLY HIGHER AMOUNTS...IN A SHORT PERIOD OF TIME.
WHILE A WIDESPREAD EVENT WITH THE DIFFICULTY OF PINPOINTING
EXACTLY WHERE AND WHEN HEAVY RAIN WILL MATERIALIZE...THERE
REMAINS A THREAT FOR NUISANCE FLOODING...ESPECIALLY ALONG ROADWAYS
AND POOR DRAINAGE AREAS. FLASH FLOODING WILL ALSO BE OF GREATER
CONCERN IF HEAVY RAIN INUNDATES AN AREA SUCCESSIVELY OVER A SHORT
PERIOD TO TIME.

&&

.BOX WATCHES/WARNINGS/ADVISORIES...
CT...NONE.
MA...FLASH FLOOD WATCH FROM 8 AM EDT THIS MORNING THROUGH THIS
     AFTERNOON FOR MAZ002>005-008>011-026.
NH...FLASH FLOOD WATCH FROM 8 AM EDT THIS MORNING THROUGH THIS
     AFTERNOON FOR NHZ011-012-015.
RI...NONE.
MARINE...SMALL CRAFT ADVISORY FROM 1 PM THIS AFTERNOON TO 2 AM EDT
     SATURDAY FOR ANZ232>234.
     SMALL CRAFT ADVISORY FROM 2 PM THIS AFTERNOON TO 10 PM EDT
     THIS EVENING FOR ANZ231.
     SMALL CRAFT ADVISORY FROM 1 PM THIS AFTERNOON TO 6 AM EDT
     SATURDAY FOR ANZ235-237.
     SMALL CRAFT ADVISORY FROM 1 PM THIS AFTERNOON TO 4 AM EDT
     SATURDAY FOR ANZ250.
     SMALL CRAFT ADVISORY FROM 11 AM THIS MORNING TO 2 PM EDT
     SATURDAY FOR ANZ254-255.
     SMALL CRAFT ADVISORY FROM 9 AM THIS MORNING TO 2 PM EDT
     SATURDAY FOR ANZ256.

&&

SYNOPSIS...WTB/SIPPRELL
NEAR TERM...WTB/SIPPRELL/EVT
SHORT TERM...SIPPRELL
LONG TERM...WTB
AVIATION...WTB/SIPPRELL/EVT
MARINE...WTB/SIPPRELL/EVT
HYDROLOGY...
Hazardous weather outlook, Aug 8, 7:42 PM EDT, 8 hours 29 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TAUNTON MA
742 PM EDT THU AUG 8 2013

CTZ002>004-MAZ002>021-026-NHZ011-012-015-RIZ001>007-092345-
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-
742 PM EDT THU AUG 8 2013

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

.DAY ONE...TONIGHT.

HAZARDOUS WEATHER IS NOT EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY.

FRIDAY INTO FRIDAY NIGHT...THE WIDESPREAD RAIN EVENT CONTINUES
WITH THE LIKELIHOOD FOR EMBEDDED HEAVIER SHOWERS AND POSSIBLE
THUNDERSTORMS WHICH MAY RESULT IN FLOODING.

THERE IS A LOW PROBABILITY FOR THUNDERSTORMS TO BECOME SEVERE.
STRONGER STORMS WILL LIKELY CONTAIN THE THREAT OF GUSTY WINDS IN
ADDITION TO HEAVY RAIN AND FREQUENT LIGHTNING.

.SPOTTER INFORMATION STATEMENT...

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.

MAZ022>024-RIZ008-092345-
BARNSTABLE MA-DUKES MA-NANTUCKET MA-BLOCK ISLAND RI-
742 PM EDT THU AUG 8 2013

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

.DAY ONE...TONIGHT.

HAZARDOUS WEATHER IS NOT EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY.

FRIDAY INTO FRIDAY NIGHT...WIDESPREAD RAIN WITH THE LIKELIHOOD
FOR EMBEDDED HEAVIER SHOWERS AND POSSIBLE THUNDERSTORMS WILL
CONTINUE.

THERE IS A LOW PROBABILITY FOR THUNDERSTORMS TO BECOME SEVERE.
STRONGER STORMS WILL LIKELY CONTAIN THE THREAT OF GUSTY WINDS IN
ADDITION TO HEAVY RAIN AND FREQUENT LIGHTNING.

.SPOTTER INFORMATION STATEMENT...

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.

ANZ230>237-250-251-254>256-092345-
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-
742 PM EDT THU AUG 8 2013

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

.DAY ONE...TONIGHT.

HAZARDOUS WEATHER IS NOT EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY.

FRIDAY INTO FRIDAY NIGHT...WIDESPREAD RAIN WITH THE LIKELIHOOD
FOR EMBEDDED HEAVIER SHOWERS AND POSSIBLE THUNDERSTORMS WILL
CONTINUE.

THERE IS A LOW PROBABILITY FOR THUNDERSTORMS TO CONTAIN GALE FORCE
WIND GUSTS IN ADDITION TO HEAVY RAIN AND LIGHTNING.

.SPOTTER INFORMATION STATEMENT...

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.

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
Aug 9, 7:31 AM EDTAreal Flood AdvisoryBOXFranklin, Hampshire, Worcester119 min
Aug 9, 8:25 AM EDTAreal Flood AdvisoryBOXHampden3 hr
Aug 9, 9:43 AM EDTSpecial Weather StatementBOXBristol47 min
Aug 9, 10:44 AM EDTSpecial Weather StatementBOXBristol46 min
Aug 9, 11:21 AM EDTFlash Flood WarningBOXHampden, Hampshire3 hr
Aug 9, 11:35 AM EDTSpecial Weather StatementBOXNorfolk, Plymouth40 min
Aug 9, 11:58 AM EDTAreal Flood AdvisoryBOXBristol, Norfolk, Plymouth, Suffolk, Worcester3 hr
Aug 9, 12:33 PM EDTFlash Flood WarningBOXFranklin, Hampden, Hampshire, Worcester3 hr
Aug 9, 12:40 PM EDTSpecial Weather StatementBOXHampden50 min
Aug 9, 1:05 PM EDTSpecial Weather StatementBOXWorcester40 min
Aug 9, 2:14 PM EDTFlash Flood WarningBOXHampden, Hampshire3 hr
Aug 9, 3:01 PM EDTAreal Flood AdvisoryBOXBristol, Essex, Middlesex, Norfolk, Plymouth, Suffolk3 hr
Aug 9, 3:05 PM EDTAreal Flood AdvisoryBOXMiddlesex, Worcester3 hr
Aug 9, 4:29 PM EDTSpecial Weather StatementBOXBarnstable46 min
Aug 9, 5:22 PM EDTAreal Flood AdvisoryBOXHampden3 hr
Aug 9, 8:15 AM EDTSpecial Weather StatementBOXKent, Providence45 min
Aug 9, 1:54 PM EDTSpecial Weather StatementBOX36 min
Aug 9, 10:16 AM EDTAreal Flood AdvisoryBOXCheshire, Hillsborough119 min

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.