Alert archive / Massachusetts / Flash Flood Warnings in 2013

Flash Flood Warning 1, NWS Boston/Norton, MA

May 23, 2013Franklin County, Hampden County, Hampshire County, Massachusetts

NWS Boston/Norton, MA issued this flash flood warning at May 23, 2013, 2:01 PM EDT for Franklin County, Hampden County, Hampshire County, Massachusetts. It was in force for 119 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
May 23, 2013, 2:01 PM EDT (18:01 UTC)
Expired
May 23, 2013, 4:00 PM EDT
In force
119 min
Issued by
NWS Boston/Norton, MA
Area
Storm-based polygon
Flood severity
None

Counties Franklin County, MA, Hampden County, MA, Hampshire County, MA

The radar

The Albany radar (KENX), 102 km from the middle of the area, began a volume at 18:02 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, 6.0 hours before the alert went out and 86 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 2013-05-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 24 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, Albany, NY at 12:00Z on 2013-05-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 142 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
24 J/kg
Mixed-layer CIN
-184 J/kg
Mixed-layer LCL
1246 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
142 m²/s²
0-3 km storm-relative helicity
148 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.

415 
WGUS51 KBOX 231801
FFWBOX
MAC011-013-015-232000-
/O.NEW.KBOX.FF.W.0001.130523T1801Z-130523T2000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TAUNTON MA
201 PM EDT THU MAY 23 2013

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A

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

* UNTIL 400 PM EDT

* AT 158 PM EDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING 
  HEAVY RAIN WITHIN THE WARNED AREA. RADAR INDICATES RAINFALL RATES 
  OF UP TO ONE INCH IN 15 MINUTES. AS A RESULT...FLASH FLOODING IS 
  EXPECTED IN THE WARNED AREA. URBAN AREAS WILL BE PARTICULARLY AT 
  RISK.

* SOME LOCATIONS THAT COULD EXPERIENCE FLOODING INCLUDE... 
  GREENFIELD...HUNTINGTON...WILLIAMSBURG...CHESTERFIELD... 
  WESTHAMPTON...GOSHEN...LEYDEN...DEERFIELD...EAST WINDSOR... 
  BERNARDSTON...WARWICK...MIDDLEFIELD...CHESTER...BUCKLAND... 
  COLRAIN...HAWLEY...WORTHINGTON...SHELBURNE...ASHFIELD...HEATH... 
  CUMMINGTON...CHARLEMONT...PLAINFIELD...SUNDERLAND...CONWAY... 
  WHATELY...NORTHFIELD...GILL...MONTAGUE AND ERVING.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

HEAVY RAINFALL WILL CAUSE RAPID FLOODING OF SMALL STREAMS...STREETS
AND UNDERPASSES...INCLUDING LOW LYING AND POOR DRAINAGE AREAS. DO NOT
DRIVE THROUGH FLOODED ROADS.

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 4238 7301 4239 7301 4261 7296 4274 7289
      4272 7228 4268 7227 4266 7223 4219 7287
      4227 7300 4231 7300 4231 7303 4233 7306
      4238 7307

$$

NMB

The office that day

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

IssuedProductOfficeCountiesLasted
May 23, 10:12 AM EDTSmall Craft AdvisoryBOX12 hr
May 23, 1:29 PM EDTSpecial Weather StatementBOXFranklin, Hampden, Hampshire2 hr
May 23, 3:20 PM EDTAreal Flood AdvisoryBOXHampden115 min
May 23, 5:00 PM EDTAreal Flood AdvisoryBOXHampden, Hampshire, Worcester2 hr
May 23, 6:03 PM EDTAreal Flood AdvisoryBOXFranklin, Hampden, Hampshire, Worcester3 hr

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.