Alert archive / Massachusetts / Flash Flood Warnings in 2014

Flash Flood Warning 26, NWS Boston/Norton, MA

July 16, 2014Bristol County, Plymouth County, Massachusetts; Newport County, Rhode Island

NWS Boston/Norton, MA issued this flash flood warning at Jul 16, 2014, 10:30 AM EDT for Bristol County, Plymouth County, Massachusetts; Newport County, Rhode Island. It was in force for 4 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Jul 16, 2014, 10:30 AM EDT (14:30 UTC)
Expired
Jul 16, 2014, 2:30 PM EDT
In force
4 hr
Issued by
NWS Boston/Norton, MA
Area
Storm-based polygon
Flood severity
None

Counties Bristol County, MA, Plymouth County, MA, Newport County, RI

The radar

The Boston radar (KBOX), 27 km from the middle of the area, began a volume at 14:32 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, 2.5 hours before the alert went out and 81 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 2014-07-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 377 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 2014-07-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 175 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
377 J/kg
Mixed-layer CIN
-38 J/kg
Mixed-layer LCL
644 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
175 m²/s²
0-3 km storm-relative helicity
170 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.

917 
WGUS51 KBOX 161430
FFWBOX
MAC005-023-RIC005-161830-
/O.NEW.KBOX.FF.W.0026.140716T1430Z-140716T1830Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TAUNTON MA
1030 AM EDT WED JUL 16 2014

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  PLYMOUTH COUNTY IN SOUTHEAST MASSACHUSETTS...
  EASTERN BRISTOL COUNTY IN SOUTHEAST MASSACHUSETTS...
  NEWPORT COUNTY IN RHODE ISLAND...

* UNTIL 230 PM EDT

* AT 1027 AM EDT...DOPPLER RADAR INDICATED HEAVY SHOWERS AND 
  THUNDERSTORMS CONTINUALLY TRAINING ACROSS THE REGION PRODUCING 
  HEAVY RAIN ACROSS THE WARNED AREA. THE REGION HAS ALREADY SEEN 
  ROUGHLY ONE TO TWO INCHES OF RAIN ALREADY. FLASH FLOODING IS 
  EXPECTED.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  NEW BEDFORD...BROCKTON...FALL RIVER...PLYMOUTH...TAUNTON... 
  WEYMOUTH...DARTMOUTH...BRIDGEWATER...MARSHFIELD...NEWPORT...AND 
  SURROUNDING MUNICIPALITIES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FLASH FLOOD WARNING IS ISSUED FOR RAPID AND POTENTIALLY LIFE 
THREATENING FLOODING. IN URBAN AREAS AVOID FLOODED ROADS AND OBEY 
ROAD CLOSURES. THOSE NEAR SMALL STREAMS MUST HEAD FOR HIGHER GROUND 
IMMEDIATELY. 

DO NOT DRIVE THROUGH FLOODED ROADS! FIND ALTERNATE ROUTES. MOST 
FLOOD DEATHS OCCUR IN VEHICLES. TURN AROUND...DONT DROWN.

&&

LAT...LON 4165 7122 4154 7123 4156 7121 4172 7120
      4171 7121 4229 7088 4200 7060 4199 7063
      4201 7071 4199 7070 4195 7058 4168 7072
      4171 7075 4158 7082 4165 7092 4149 7104
      4145 7135

$$

SIPPRELL
1 follow-up statement
434 
WGUS71 KBOX 161814
FFSBOX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
214 PM EDT WED JUL 16 2014

MAC005-023-RIC005-161822-
/O.CAN.KBOX.FF.W.0026.000000T0000Z-140716T1830Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
PLYMOUTH MA-BRISTOL MA-NEWPORT RI-
214 PM EDT WED JUL 16 2014

...THE FLASH FLOOD WARNING FOR PLYMOUTH...EASTERN BRISTOL AND NEWPORT
COUNTIES IS CANCELLED...

FLOOD WATERS HAVE RECEDED...AND ARE NO LONGER EXPECTED TO POSE A
THREAT TO LIFE OR PROPERTY. PLEASE CONTINUE TO HEED ANY ROAD
CLOSURES.

FLASH FLOOD WARNINGS MAY BE ISSUED LATER IN TIME AS ADDITIONAL HEAVY 
RAIN IS POSSIBLE INTO THIS EVENING. A FLASH FLOOD WATCH CONTINUES 
UNTIL 8 PM FOR SOUTHEAST MA AND SOUTHERN RI. 

LAT...LON 4165 7122 4154 7123 4156 7121 4172 7120
      4171 7121 4229 7088 4200 7060 4199 7063
      4201 7071 4199 7070 4195 7058 4168 7072
      4171 7075 4158 7082 4165 7092 4149 7104
      4145 7135

$$

SIPPRELL

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 15, 8:48 PM EDTSpecial Weather StatementBOXFranklin57 min
Jul 15, 9:56 PM EDTFlash Flood WarningBOXFranklin3 hr
Jul 15, 10:29 PM EDTSpecial Weather StatementBOXWorcester46 min
Jul 15, 11:14 PM EDTSpecial Weather StatementBOXMiddlesex61 min
Jul 15, 11:49 PM EDTSpecial Weather StatementBOXBristol, Plymouth56 min
Jul 15, 11:51 PM EDTFlash Flood WarningBOXBristol, Plymouth3 hr
Jul 16, 12:31 AM EDTSpecial Weather StatementBOXBristol, Plymouth59 min
Jul 16, 12:55 AM EDTSpecial Marine WarningBOX65 min
Jul 16, 4:33 AM EDTSpecial Weather StatementBOXDukes57 min
Jul 16, 4:44 AM EDTAreal Flood AdvisoryBOXBarnstable, Bristol, Dukes, Plymouth2 hr
Jul 16, 7:38 AM EDTFlash Flood WarningBOXBristol3 hr
Jul 16, 8:32 AM EDTFlash Flood WarningBOXBristol, Plymouth118 min
Jul 16, 9:23 AM EDTSpecial Weather StatementBOXEssex, Norfolk, Suffolk52 min
Jul 16, 2:09 PM EDTSpecial Weather StatementBOXEssex, Norfolk, Suffolk81 min
Jul 16, 2:32 PM EDTFlash Flood WarningBOXEssex, Middlesex3 hr
Jul 16, 2:46 PM EDTSpecial Weather StatementBOXEssex, Suffolk59 min
Jul 16, 2:49 PM EDTFlash Flood WarningBOXEssex, Middlesex, Suffolk3 hr
Jul 16, 3:35 PM EDTSmall Craft Advisory for Hazardous SeasBOX24 hr

Nearby

Flash Flood Warnings in Massachusetts, 2014Flash Flood Warnings in Rhode Island, 2014Every flash flood warning in 2014

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.