Alert archive / Massachusetts / Flash Flood Warnings in 2012

Flash Flood Warning 16, NWS Boston/Norton, MA

August 10, 2012Bristol County, Plymouth County, Massachusetts

NWS Boston/Norton, MA issued this flash flood warning at Aug 10, 2012, 5:09 PM EDT for Bristol County, Plymouth County, Massachusetts. It was in force for 3 hr. 12 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Aug 10, 2012, 5:09 PM EDT (21:09 UTC)
Expired
Aug 10, 2012, 8:15 PM EDT
In force
3 hr
Issued by
NWS Boston/Norton, MA
Area
Storm-based polygon
Flood severity
None

Counties Bristol County, MA, Plymouth County, MA

The radar

The Boston radar (KBOX), 20 km from the middle of the area, began a volume at 21:10 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.

What was reported inside it

TimeReportWhereRemark
Aug 10, 5:12 PM EDTFLASH FLOODFall River, MAPLYMOUTH AVENUE FLOODED WITH 4 FEET OF WATER...ST ANNE S HOSPITAL ON DIVERSION DUE TO FLOODING IN THE ER SEVERAL INCHES DEEP...PRESIDENTS AVE FLOODED WITH 1-2 FT OF WATER.
Aug 10, 5:19 PM EDTFLASH FLOODSomerset, MACOUNTY ROAD CLOSED DUE TO FLOODING FROM BUFFINGTON BROOK OVERFLOWING ITS BANKS...2 FEET OF WATER OVER THE ROAD.
Aug 10, 5:30 PM EDTFLOODFall River, MADAVOL STREET FLOODED WITH A CAR STUCK IN THE FLOOD WATERS.
Aug 10, 5:31 PM EDTFLOODSouth Attleboro, MAFLOODING OVER THE CURBS ON RTE 1A
Aug 10, 5:44 PM EDTFLASH FLOODSomerset, MAFLORIDA AVE AND GIBBS ST FLOODED DUE TO BUFFINGTON BROOK OVERFLOWING ITS BANKS.
Aug 10, 5:46 PM EDTFLOODRaynham, MAROUTE 138 FLOODED NEAR MARKET BASKET.
Aug 10, 5:48 PM EDTFLOODTaunton, MACAR STUCK IN FLOOD WATERS ON TREMONT STREET...OCCUPANTS TRAPPED AND RESCUED.
Aug 10, 5:49 PM EDTFLOODSwansea, MAINTERSECTION OF MACOMBER AND PUFFER AVENUES FLOODED. ROUTE 6 IN FRONT OF ORIENTAL PEARL RESTAURANT FLOODED. PARKING LOT AT SWANSEA CROSSING SHOPPING PLAZA FLOODED. MANHOLE COVERS ON ROUTE 118 LIFTED BY FLOOD WATERS.
Aug 10, 6:06 PM EDTFLOODTaunton, MAWEIR STREET IMPASSABLE DUE TO FLOODING
Aug 10, 6:17 PM EDTFLOODTaunton, MAMARION MANOR NURSING HOME CEILING COLLAPSED DUE TO 10 INCHES OF WATER ON ROOF
Aug 10, 6:30 PM EDTFLOODTaunton, MAPOWDERHORN DRIVE IMPASSABLE DUE TO FLOODING...12-15 INCHES OF WATER ON ROAD
Aug 10, 7:02 PM EDTFLOODBrockton, MASEVERAL STREETS FLOODED AND IMPASSABLE INCLUDING... NORTH MAIN STREET NEAR LANSDOWN STREET AND WARREN AVENUE

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Chatham, MA (KCHH), launched 12:00Z, 9.2 hours before the alert went out and 83 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 2012-08-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 424 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Chatham, MA at 12:00Z on 2012-08-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 60 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
424 J/kg
Mixed-layer CIN
-29 J/kg
Mixed-layer LCL
475 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
60 m²/s²
0-3 km storm-relative helicity
77 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.

066 
WGUS51 KBOX 102109
FFWBOX
MAC005-023-110015-
/O.NEW.KBOX.FF.W.0016.120810T2109Z-120811T0015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TAUNTON MA
509 PM EDT FRI AUG 10 2012

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  BRISTOL COUNTY IN SOUTHEAST MASSACHUSETTS...
  PLYMOUTH COUNTY IN SOUTHEAST MASSACHUSETTS...

* UNTIL 815 PM EDT

* AT 505 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  ONE HOUR RAINFALL RATES OF 1 TO 2 INCHES IN 30 MINUTES FROM A LINE 
  OF THUNDERSTORMS MOVING NORTH ACROSS OVER THE WARNED AREA. ALREADY 
  REPORTS HAVE BEEN RECEIVED OF ROADS BECOMING INUNDATED WITH        
  SEVERAL INCHES OF WATER IN A VERY SHORT PERIOD OF TIME.

FLASH FLOODING OF SMALL STREAMS AND URBAN AREAS IS OCCURRING OR
IMMINENT. THOSE NEAR STREAMS AND CREEKS...OR IN AREAS PRONE TO
FLOODING SHOULD MOVE TO HIGHER GROUND IMMEDIATELY. AVOID FLOODED
ROADS. THE WATER MAY BE TOO DEEP TO ALLOW VEHICLES TO CROSS SAFELY...
OR THE ROADWAY MAY BE UNDERMINED. TURN AROUND...DONT DROWN!

&&

LAT...LON 4151 7112 4166 7114 4180 7134 4190 7134
      4190 7136 4198 7138 4216 7092 4228 7087
      4220 7083 4225 7075 4209 7063 4200 7070
      4198 7065 4183 7068 4167 7071 4169 7073
      4162 7085 4158 7082 4162 7089 4148 7104

$$

SIPPRELL
1 follow-up statement
942 
WGUS71 KBOX 110018
FFSBOX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
818 PM EDT FRI AUG 10 2012

MAC005-023-110027-
/O.EXP.KBOX.FF.W.0016.000000T0000Z-120811T0015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
PLYMOUTH MA-BRISTOL MA-
818 PM EDT FRI AUG 10 2012

...THE FLASH FLOOD WARNING HAS EXPIRED FOR BRISTOL AND PLYMOUTH
COUNTIES IN SOUTHEAST MASSACHUSETTS...

A TORNADO WATCH REMAINS IN EFFECT UNTIL 900 PM EDT FRIDAY EVENING IN 
PLYMOUTH COUNTY.

LAT...LON 4151 7112 4166 7114 4180 7134 4190 7134
      4190 7136 4198 7138 4216 7092 4228 7087
      4220 7083 4225 7075 4209 7063 4200 7070
      4198 7065 4183 7068 4167 7071 4169 7073
      4162 7085 4158 7082 4162 7089 4148 7104

$$

WTB

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 10, 4:31 AM EDTSmall Craft AdvisoryBOX3 days
Aug 10, 10:57 AM EDTSpecial Weather StatementBOXHampshire63 min
Aug 10, 11:07 AM EDTSpecial Weather StatementBOXHampshire53 min
Aug 10, 11:35 AM EDTSpecial Weather StatementBOXHampden55 min
Aug 10, 11:40 AM EDTSpecial Weather StatementBOXFranklin65 min
Aug 10, 11:45 AM EDTSpecial Weather StatementBOXFranklin60 min
Aug 10, 11:52 AM EDTAreal Flood AdvisoryBOXFranklin, Hampden, Hampshire6 hr
Aug 10, 12:29 PM EDTSpecial Weather StatementBOXHampshire61 min
Aug 10, 1:15 PM EDTSevere Thunderstorm WarningBOXHampden, Hampshire30 min
Aug 10, 2:29 PM EDTSpecial Weather StatementBOXWorcester61 min
Aug 10, 3:13 PM EDTSpecial Marine WarningBOX92 min
Aug 10, 3:36 PM EDTAreal Flood AdvisoryBOXBristol, Hampden, Hampshire, Middlesex, Norfolk, Plymouth and 2 more2 hr
Aug 10, 4:45 PM EDTSpecial Marine WarningBOX30 min
Aug 10, 4:45 PM EDTSevere Thunderstorm WarningBOXHampden, Worcester45 min
Aug 10, 5:00 PM EDTTornado WarningBOXHampden, Hampshire45 min
Aug 10, 5:03 PM EDTSpecial Marine WarningBOX87 min
Aug 10, 5:16 PM EDTSevere Thunderstorm WarningBOXBristol, Plymouth59 min
Aug 10, 5:20 PM EDTSpecial Marine WarningBOX25 min
Aug 10, 5:27 PM EDTFlash Flood WarningBOXFranklin, Hampden, Hampshire, Middlesex, Norfolk, Suffolk and 1 more3 hr
Aug 10, 5:31 PM EDTSevere Thunderstorm WarningBOXHampden, Worcester44 min
Aug 10, 5:33 PM EDTSevere Thunderstorm WarningBOXBristol27 min
Aug 10, 5:45 PM EDTSevere Thunderstorm WarningBOXFranklin, Hampden, Hampshire, Worcester45 min
Aug 10, 5:47 PM EDTSpecial Weather StatementBOXMiddlesex43 min
Aug 10, 5:55 PM EDTFlash Flood WarningBOXEssex3 hr
Aug 10, 6:08 PM EDTSpecial Marine WarningBOX52 min
Aug 10, 6:23 PM EDTSevere Thunderstorm WarningBOXBristol, Middlesex, Norfolk, Plymouth, Suffolk37 min
Aug 10, 6:46 PM EDTSpecial Weather StatementBOXBristol44 min
Aug 10, 7:45 PM EDTSpecial Marine WarningBOX30 min

Nearby

Flash Flood Warnings in Massachusetts, 2012Every flash flood warning in 2012

Sources

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