Alert archive / Massachusetts / Flash Flood Warnings in 2013

Flash Flood Warning 19, NWS Boston/Norton, MA

June 30, 2013Franklin County, Massachusetts

NWS Boston/Norton, MA issued this flash flood warning at Jun 30, 2013, 4:35 PM EDT for Franklin County, Massachusetts. It was in force for 115 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Jun 30, 2013, 4:35 PM EDT (20:35 UTC)
Expired
Jun 30, 2013, 6:30 PM EDT
In force
115 min
Issued by
NWS Boston/Norton, MA
Area
Storm-based polygon
Flood severity
None

County Franklin County, MA

The radar

The Albany radar (KENX), 118 km from the middle of the area, began a volume at 20:38 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

Albany, NY (KALY), launched 12:00Z, 8.6 hours before the alert went out and 99 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, Albany, NY at 12:00Z on 2013-06-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 23 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, Albany, NY at 12:00Z on 2013-06-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 89 square meters per square second.1939587897Sfc1 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
23 J/kg
Mixed-layer CIN
-107 J/kg
Mixed-layer LCL
860 m above ground
0-6 km bulk shear
47 kt
0-1 km storm-relative helicity
89 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.

154 
WGUS51 KBOX 302035
FFWBOX
MAC011-302230-
/O.NEW.KBOX.FF.W.0019.130630T2035Z-130630T2230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TAUNTON MA
435 PM EDT SUN JUN 30 2013

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHERN FRANKLIN COUNTY IN WESTERN MASSACHUSETTS...

* UNTIL 630 PM EDT

* AT 431 PM EDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING
  HEAVY RAIN ACROSS THE WARNED AREA. UP TO TWO INCHES OF RAIN HAVE 
  ALREADY FALLEN. AN ADDITIONAL 1 TO 2 INCHES OF RAIN MAY OCCUR IN 
  THE NEXT HOUR. FLASH FLOODING IS EXPECTED TO BEGIN SHORTLY.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  GREENFIELD...DEERFIELD...LEYDEN...BERNARDSTON...SHELBURNE...
  BUCKLAND AND COLRAIN.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FLASH FLOOD WARNING IS ISSUED FOR RAPID AND POTENTIALLY LIFE
THREATENING FLOODING. IN URBAN AREAS AVOID FLOODED ROADWAYS AND OBEY
ROAD CLOSURES. THOSE LIVING ALONG STREAMS AND CREEKS SHOULD MOVE TO
HIGHER GROUND IMMEDIATELY TO PROTECT LIFE AND PROPERTY.
&&

LAT...LON 4273 7270 4273 7250 4272 7248 4252 7254
      4255 7282

$$

FRANK
2 follow-up statements
058 
WGUS71 KBOX 302119
FFSBOX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
519 PM EDT SUN JUN 30 2013

MAC011-302230-
/O.CON.KBOX.FF.W.0019.000000T0000Z-130630T2230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
FRANKLIN MA-
519 PM EDT SUN JUN 30 2013

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 630 PM EDT FOR
NORTHERN FRANKLIN COUNTY...

AT 517 PM EDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING HEAVY
RAIN ACROSS THE WARNED AREA. UP TO TWO INCHES OF RAIN HAVE ALREADY
FALLEN. AN ADDITIONAL 1 TO 2 INCHES OF RAIN MAY OCCUR THROUGH 
63O PM. FLASH FLOODING IS EXPECTED TO BEGIN SHORTLY WITH THE AREA OF 
GREATEST CONCERN AROUND LEYDEN.

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
GREENFIELD...DEERFIELD...LEYDEN...BERNARDSTON...SHELBURNE...BUCKLAND
AND COLRAIN.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

&&

LAT...LON 4273 7270 4273 7250 4272 7248 4252 7254
      4255 7282

$$

FRANK
668 
WGUS71 KBOX 302224
FFSBOX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
624 PM EDT SUN JUN 30 2013

MAC011-302231-
/O.EXP.KBOX.FF.W.0019.000000T0000Z-130630T2230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
FRANKLIN MA-
624 PM EDT SUN JUN 30 2013

...THE FLASH FLOOD WARNING FOR NORTHERN FRANKLIN COUNTY WILL EXPIRE
AT 630 PM EDT...

THE THUNDERSTORMS THAT PRODUCED THE TORRENTIAL RAINFALL ACROSS 
PORTIONS OF FRANKLIN COUNTY HAVE EXITED THE WARNED AREA.  SHOWERS 
WILL CONTINUE FOR THE NEXT HOUR OR TWO AND MAY RESULT IN ADDITIONAL 
MINOR FLOODING.  HOWEVER...RAINFALL AMOUNTS ARE NOT EXPECTED TO BE 
HIGH ENOUGH TO RESULT IN ANY ADDITIONAL FLASH FLOODING.  
THEREFORE...THE FLASH FLOOD WARNING WILL EXPIRE ON TIME AT 630 PM.

LAT...LON 4273 7270 4273 7250 4272 7248 4252 7254
      4255 7282

$$

FRANK

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 30, 2:27 PM EDTSpecial Weather StatementBOXFranklin48 min
Jun 30, 2:52 PM EDTSpecial Weather StatementBOXFranklin38 min
Jun 30, 4:14 PM EDTAreal Flood AdvisoryBOXFranklin2 hr
Jun 30, 4:18 PM EDTSpecial Weather StatementBOXFranklin42 min
Jun 30, 5:01 PM EDTSpecial Weather StatementBOXFranklin44 min

Nearby

Flash Flood Warnings in Massachusetts, 2013Every flash flood warning 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.