Alert archive / Massachusetts / Flash Flood Warnings in 2013

Flash Flood Warning 33, NWS Boston/Norton, MA

July 23, 2013Franklin County, Hampshire County, Massachusetts

NWS Boston/Norton, MA issued this flash flood warning at Jul 23, 2013, 1:14 AM EDT for Franklin County, Hampshire County, Massachusetts. It was in force for 2 hr. 1 report 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: Jul 23, 2013, 1:14 AM EDT (05:14 UTC)
Expired: Jul 23, 2013, 3:15 AM EDT
In force: 2 hr
Issued by: NWS Boston/Norton, MA
Area: Storm-based polygon
Flood severity: None

Counties Franklin County, MA, Hampshire County, MA

What was reported inside it

Time	Report	Where	Remark
Jul 23, 3:00 AM EDT	FLASH FLOOD	Deerfield, MA	CARS FLOODED OUT IN THE PARKING LOT OF THE DEERFIELD ACADEMY CENTER

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

The nearest sounding before it

Albany, NY (KALY), launched 00:00Z, 5.2 hours before the alert went out and 78 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: 1090 J/kg
Mixed-layer CIN: -7 J/kg
Mixed-layer LCL: 1008 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 13 m²/s²
0-3 km storm-relative helicity: 67 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.4

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

718 
WGUS51 KBOX 230514
FFWBOX
MAC011-015-230715-
/O.NEW.KBOX.FF.W.0033.130723T0514Z-130723T0715Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TAUNTON MA
114 AM EDT TUE JUL 23 2013

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CENTRAL HAMPSHIRE COUNTY IN WESTERN MASSACHUSETTS...
  FRANKLIN COUNTY IN WESTERN MASSACHUSETTS...

* UNTIL 315 AM EDT

* AT 112 AM EDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING
  HEAVY RAIN ACROSS THE WARNED AREA. UP TO TWO INCHES OF RAIN HAVE
  ALREADY FALLEN. FLASH FLOODING IS EXPECTED TO BEGIN SHORTLY.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  AMHERST...GREENFIELD...WILLIAMSBURG...CHESTERFIELD...GOSHEN...
  LEYDEN...DEERFIELD...SHUTESBURY...LEVERETT...PELHAM...EAST
  WINDSOR...BERNARDSTON...NEW SALEM...WARWICK...BUCKLAND...COLRAIN...
  HAWLEY...WORTHINGTON...SHELBURNE...ASHFIELD...HEATH...CUMMINGTON...
  CHARLEMONT...PLAINFIELD...SUNDERLAND...CONWAY...WHATELY...
  HATFIELD...NORTHFIELD AND GILL.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY.
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE
PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS
SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY
AUTOMOBILE.

&&

LAT...LON 4238 7307 4238 7301 4263 7295 4266 7295
      4267 7300 4269 7296 4270 7295 4270 7302
      4273 7301 4271 7229 4235 7234 4236 7299

$$

NOCERA

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 22, 10:31 PM EDT	Areal Flood Advisory	BOX	Franklin, Hampshire	3 hr
Jul 23, 4:12 AM EDT	Flash Flood Watch	BOX	Bristol, Essex, Franklin, Hampden, Hampshire, Middlesex and 4 more	15 hr
Jul 23, 5:40 AM EDT	Areal Flood Advisory	BOX	Franklin, Hampshire	3 hr
Jul 23, 6:15 AM EDT	Flash Flood Warning	BOX	Franklin	2 hr
Jul 23, 6:47 AM EDT	Areal Flood Advisory	BOX	Franklin, Worcester	3 hr
Jul 23, 10:22 AM EDT	Areal Flood Advisory	BOX	Franklin, Hampden, Hampshire, Worcester	113 min
Jul 23, 11:37 AM EDT	Areal Flood Advisory	BOX	Middlesex, Worcester	113 min
Jul 23, 12:43 PM EDT	Areal Flood Advisory	BOX	Essex, Middlesex, Norfolk, Plymouth, Suffolk	2 hr
Jul 23, 12:52 PM EDT	Special Weather Statement	BOX	Essex	38 min
Jul 23, 12:56 PM EDT	Flash Flood Warning	BOX	Middlesex, Norfolk, Suffolk	2 hr
Jul 23, 1:12 PM EDT	Flash Flood Warning	BOX	Middlesex, Norfolk	2 hr
Jul 23, 1:25 PM EDT	Severe Thunderstorm Warning	BOX	Norfolk, Suffolk	65 min
Jul 23, 1:26 PM EDT	Areal Flood Advisory	BOX	Essex, Norfolk, Plymouth, Suffolk	2 hr
Jul 23, 1:36 PM EDT	Special Marine Warning	BOX		54 min
Jul 23, 1:40 PM EDT	Special Weather Statement	BOX	Essex	50 min
Jul 23, 2:31 PM EDT	Areal Flood Advisory	BOX	Hampden, Hampshire, Worcester	119 min
Jul 23, 2:56 PM EDT	Special Weather Statement	BOX	Essex, Middlesex, Worcester	64 min
Jul 23, 3:13 PM EDT	Areal Flood Advisory	BOX	Essex, Middlesex, Worcester	2 hr
Jul 23, 3:34 PM EDT	Special Weather Statement	BOX	Essex, Middlesex	56 min
Jul 23, 3:38 PM EDT	Severe Thunderstorm Warning	BOX	Essex, Middlesex, Suffolk	52 min
Jul 23, 3:45 PM EDT	Special Marine Warning	BOX		90 min
Jul 23, 3:58 PM EDT	Areal Flood Advisory	BOX	Essex, Middlesex	2 hr
Jul 23, 4:15 PM EDT	Areal Flood Advisory	BOX	Essex, Middlesex, Norfolk, Plymouth, Suffolk, Worcester	2 hr
Jul 23, 4:20 PM EDT	Special Weather Statement	BOX	Suffolk	40 min
Jul 23, 4:40 PM EDT	Flash Flood Warning	BOX	Essex, Middlesex, Norfolk, Suffolk	2 hr
Jul 23, 5:00 PM EDT	Flash Flood Warning	BOX	Bristol, Middlesex, Norfolk, Plymouth, Suffolk, Worcester	2 hr
Jul 23, 5:10 PM EDT	Special Weather Statement	BOX	Bristol	50 min

Nearby

Flash Flood Warnings in Massachusetts, 2013 Every 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive.