Alert archive / Massachusetts / Flash Flood Warnings in 2014

Flash Flood Warning 44, NWS Boston/Norton, MA

August 31, 2014Worcester County, Massachusetts

NWS Boston/Norton, MA issued this flash flood warning at Aug 31, 2014, 8:11 PM EDT for Worcester County, Massachusetts. It was in force for 3 hr. 11 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 31, 2014, 8:11 PM EDT (00:11 UTC)
Expired: Aug 31, 2014, 11:15 PM EDT
In force: 3 hr
Issued by: NWS Boston/Norton, MA
Area: Storm-based polygon
Flood severity: None

County Worcester County, MA

The radar

The Boston radar (KBOX), 61 km from the middle of the area, began a volume at 00:11 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

Time	Report	Where	Remark
Aug 31, 8:23 PM EDT	FLOOD	Worcester, MA	BRIDGE ST AT UNION ST FLOODED AND IMPASSABLE
Aug 31, 8:23 PM EDT	FLASH FLOOD	Worcester, MA	BRIDGE ST AT UNION ST FLOODED AND IMPASSABLE
Aug 31, 8:31 PM EDT	FLOOD	Worcester, MA	STREET FLOODING ON PLANTATION ST AND HARRINGTON WAY...UP TO 10 INCHES DEEP. PARK AVENUE FLOODED AND IMPASSABLE...MANHOLE COVERS POPPED.
Aug 31, 8:31 PM EDT	FLASH FLOOD	Worcester, MA	STREET FLOODING ON PLANTATION ST AND HARRINGTON WAY...UP TO 10 INCHES DEEP. PARK AVENUE FLOODED AND IMPASSABLE...MANHOLE COVERS POPPED.
Aug 31, 8:32 PM EDT	FLOOD	Worcester, MA	LINCOLN ST FLOODED AND IMPASSABLE...CAUSING A 2 CAR ACCIDENT.
Aug 31, 8:32 PM EDT	FLASH FLOOD	Worcester, MA	LINCOLN ST FLOODED AND IMPASSABLE...CAUSING A 2 CAR ACCIDENT
Aug 31, 8:35 PM EDT	FLASH FLOOD	Worcester, MA	NORTON DRIVE...FLOODED AND IMPASSABLE
Aug 31, 8:40 PM EDT	FLASH FLOOD	Worcester, MA	GLENNIE STREET NEAR THE W.B. MASON STORE...FLOODED AND IMPASSABLE...CARS FLOODED IN PARKING LOT
Aug 31, 8:45 PM EDT	FLASH FLOOD	Shrewsbury, MA	MAPLE AVENUE AT ROUTE 9 CLOSED DUE TO FLOODING
Aug 31, 8:45 PM EDT	FLASH FLOOD	Worcester, MA	CAR STUCK IN FLOOD WATERS ON ROUTE 146 SOUTH AT EXIT 12...ROUTE 122A RAMP
Aug 31, 9:19 PM EDT	FLASH FLOOD	Worcester, MA	QUINSIGAMOND AVENUE FLOODED WITH 1 FOOT OF WATER

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 00:00Z, 0.2 hours before the alert went out and 158 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: 384 J/kg
Mixed-layer CIN: -51 J/kg
Mixed-layer LCL: 568 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 133 m²/s²
0-3 km storm-relative helicity: 149 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.

866 
WGUS51 KBOX 010011
FFWBOX
MAC027-010315-
/O.NEW.KBOX.FF.W.0044.140901T0011Z-140901T0315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TAUNTON MA
811 PM EDT SUN AUG 31 2014

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  EAST CENTRAL WORCESTER COUNTY IN CENTRAL MASSACHUSETTS...

* UNTIL 1115 PM EDT

* AT 810 PM EDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING
  HEAVY RAIN ACROSS THE WARNED AREA.  FLASH FLOODING IS EXPECTED TO
  BEGIN SHORTLY.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  WORCESTER...MARLBOROUGH...SHREWSBURY...WESTBOROUGH...GRAFTON...
  HOLDEN...AUBURN...NORTHBOROUGH...CLINTON...MILLBURY...LANCASTER...
  STERLING...WEST BOYLSTON...BOLTON...BOYLSTON AND BERLIN.

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.

&&

LAT...LON 4236 7160 4235 7162 4231 7158 4229 7157
      4218 7183 4245 7182 4247 7165

$$

BELK

1 follow-up statement

542 
WGUS71 KBOX 010110
FFSBOX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
910 PM EDT SUN AUG 31 2014

MAC027-010120-
/O.CAN.KBOX.FF.W.0044.000000T0000Z-140901T0315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WORCESTER MA-
910 PM EDT SUN AUG 31 2014

...THE FLASH FLOOD WARNING FOR EAST CENTRAL WORCESTER COUNTY 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.

LAT...LON 4236 7160 4235 7162 4231 7158 4229 7157
      4218 7183 4245 7182 4247 7165

$$

BELK

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 31, 8:04 PM EDT	Special Weather Statement	BOX	Middlesex	41 min
Aug 31, 8:14 PM EDT	Tornado Warning	BOX	Middlesex, Worcester	34 min
Aug 31, 9:09 PM EDT	Areal Flood Advisory	BOX	Essex, Middlesex, Norfolk, Suffolk	2 hr
Aug 31, 10:01 PM EDT	Areal Flood Advisory	BOX	Bristol, Dukes	119 min

Nearby

Flash Flood Warnings in Massachusetts, 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.