Alert archive / Massachusetts / Flash Flood Warnings in 2014

Flash Flood Warning 37, NWS Boston/Norton, MA

August 13, 2014Bristol County, Norfolk County, Worcester County, Massachusetts; Bristol County, Providence County, Rhode Island

NWS Boston/Norton, MA issued this flash flood warning at Aug 13, 2014, 11:24 AM EDT for Bristol County, Norfolk County, Worcester County, Massachusetts; Bristol County, Providence 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: Aug 13, 2014, 11:24 AM EDT (15:24 UTC)
Expired: Aug 13, 2014, 3:15 PM EDT
In force: 4 hr
Issued by: NWS Boston/Norton, MA
Area: Storm-based polygon
Flood severity: None

Counties Bristol County, MA, Norfolk County, MA, Worcester County, MA, Bristol County, RI, Providence County, RI

The radar

The Boston radar (KBOX), 21 km from the middle of the area, began a volume at 15:24 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, 3.4 hours before the alert went out and 121 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 997 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 93 m²/s²
0-3 km storm-relative helicity: 166 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.

728 
WGUS51 KBOX 131524
FFWBOX
MAC005-021-027-RIC001-007-131915-
/O.NEW.KBOX.FF.W.0037.140813T1524Z-140813T1915Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TAUNTON MA
1124 AM EDT WED AUG 13 2014

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHWESTERN BRISTOL COUNTY IN SOUTHEAST MASSACHUSETTS...
  SOUTHEASTERN WORCESTER COUNTY IN CENTRAL MASSACHUSETTS...
  SOUTHWESTERN NORFOLK COUNTY IN EASTERN MASSACHUSETTS...
  NORTHERN PROVIDENCE COUNTY IN RHODE ISLAND...
  NORTH CENTRAL BRISTOL COUNTY IN RHODE ISLAND...

* UNTIL 315 PM EDT

* AT 1121 AM EDT...DOPPLER RADAR INDICATED A SWATH OF MODERATE TO 
  HEAVY RAIN ACROSS THE WARNED AREA. RADAR ESTIMATES THAT TWO INCHES 
  OF RAIN HAS ALREADY FALLEN OVER PORTIONS OF FAR NORTHERN RHODE 
  ISLAND.  RAINFALL RATES OF 1 TO 2 INCHES PER HOUR ARE EXPECTED 
  WITHIN THE WARNING AREA INTO EARLY THIS AFTERNOON. AS A 
  RESULT...FLASH FLOODING IS EXPECTED.  

* THE MAIN THREAT IS URBAN FLASH FLOODING AS WELL AS RAPID 
  INUNDATION OF OTHER LOW LYING AND POOR DRAINAGE AREAS.  
  HOWEVER...SMALL STREAM FLOODING IS ALSO POSSIBLE.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  PAWTUCKET...TAUNTON...EAST PROVIDENCE...WOONSOCKET...CUMBERLAND...
  NORTH PROVIDENCE...FRANKLIN...JOHNSTON...NORTH ATTLEBOROUGH...
  STOUGHTON...ATTLEBORO...MANSFIELD...EASTON...SMITHFIELD...
  LINCOLN...CENTRAL FALLS...NORTON...SHARON...FOXBOROUGH...
  BELLINGHAM...BARRINGTON...BURRILLVILLE...SWANSEA...SEEKONK...
  UXBRIDGE...NORTH SMITHFIELD...REHOBOTH...NORFOLK...WRENTHAM AND
  GLOCESTER.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

RAPID AND POTENTIALLY LIFE THREATENING FLOODING OF STREETS AND
UNDERPASSES IS IMMINENT. DO NOT DRIVE THROUGH FLOODED ROADS AND FIND
ALTERNATE ROUTES.

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.

&&

LAT...LON 4186 7138 4187 7170 4208 7165 4210 7113
      4185 7117 4175 7131

$$

NMB

1 follow-up statement

432 
WGUS71 KBOX 131738
FFSBOX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
138 PM EDT WED AUG 13 2014

MAC005-021-027-RIC001-007-131743-
/O.CAN.KBOX.FF.W.0037.000000T0000Z-140813T1915Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BRISTOL MA-WORCESTER MA-NORFOLK MA-PROVIDENCE RI-BRISTOL RI-
138 PM EDT WED AUG 13 2014

...THE FLASH FLOOD WARNING FOR NORTHWESTERN BRISTOL...SOUTHEASTERN
WORCESTER...SOUTHWESTERN NORFOLK...NORTHERN PROVIDENCE AND NORTH
CENTRAL BRISTOL COUNTIES IS CANCELLED...

RADAR INDICATED THAT THE AREA OF HEAVY RAIN THAT AFFECTED NORTHEAST 
RHODE ISLAND AND SOUTH CENTRAL MASSACHUSETTS AROUND MIDDAY...HAD 
DIMINISHED AND MOVED AWAY.  LINGERING AREAS OF LIGHT TO MODERATE 
RAIN REMAINED.  AT THIS TIME...THE THREAT FOR FLASH FLOODING IN THIS 
AREA HAS ENDED...AND THE FLASH FLOOD WARNING HAS BEEN CANCELED.

A FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL 8 PM.  THERE IS STILL 
THE POTENTIAL FOR RENEWED HEAVY RAINS TO AFFECT PORTIONS OF SOUTHERN 
NEW ENGLAND AS THE AFTERNOON AND EARLY EVENING PROGRESS.

LAT...LON 4186 7138 4187 7170 4208 7165 4210 7113
      4185 7117 4175 7131

$$

NMB

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 13, 8:58 AM EDT	Areal Flood Advisory	BOX	Worcester	2 hr
Aug 13, 10:33 AM EDT	Coastal Flood Advisory	BOX	Barnstable, Essex, Nantucket, Norfolk, Plymouth, Suffolk	5 hr
Aug 13, 10:59 AM EDT	Areal Flood Advisory	BOX	Bristol, Middlesex, Norfolk, Worcester	4 hr
Aug 13, 12:43 PM EDT	Areal Flood Advisory	BOX	Franklin, Hampden, Hampshire	2 hr
Aug 13, 1:30 PM EDT	Flash Flood Warning	BOX	Hampden, Hampshire	4 hr
Aug 13, 1:59 PM EDT	Flash Flood Warning	BOX	Franklin, Hampshire	4 hr
Aug 13, 3:46 PM EDT	Flash Flood Warning	BOX	Franklin, Hampshire, Middlesex, Worcester	4 hr
Aug 13, 4:23 PM EDT	Severe Thunderstorm Warning	BOX	Worcester	32 min
Aug 13, 4:28 PM EDT	Special Marine Warning	BOX		62 min
Aug 13, 5:00 PM EDT	Flash Flood Warning	BOX	Middlesex, Worcester	4 hr
Aug 13, 6:16 PM EDT	Areal Flood Advisory	BOX	Essex, Middlesex	119 min
Aug 13, 6:17 AM EDT	Areal Flood Advisory	BOX	Providence	3 hr
Aug 13, 8:22 AM EDT	Areal Flood Advisory	BOX	Bristol, Kent, Washington	113 min
Aug 13, 8:30 AM EDT	Flash Flood Warning	BOX	Bristol, Kent, Providence	4 hr
Aug 13, 9:12 AM EDT	Flash Flood Warning	BOX	Kent, Providence	4 hr

Nearby

Flash Flood Warnings in Massachusetts, 2014 Flash Flood Warnings in Rhode Island, 2014 Every 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.