Alert archive / Massachusetts / Flash Flood Warnings in 2014

Flash Flood Warning 5, NWS Boston/Norton, MA

May 23, 2014Hampden County, Massachusetts

NWS Boston/Norton, MA issued this flash flood warning at May 23, 2014, 8:22 PM EDT for Hampden County, Massachusetts. It was in force for 113 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, 2014, 8:22 PM EDT (00:22 UTC)
Expired
May 23, 2014, 10:15 PM EDT
In force
113 min
Issued by
NWS Boston/Norton, MA
Area
Storm-based polygon
Flood severity
None

County Hampden County, MA

The radar

The Boston radar (KBOX), 110 km from the middle of the area, began a volume at 00:25 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 00:00Z, 0.4 hours before the alert went out and 140 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 00:00Z on 2014-05-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 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 00:00Z on 2014-05-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 50 square meters per square second.1939Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
784 m above ground
0-6 km bulk shear
4 kt
0-1 km storm-relative helicity
50 m²/s²
0-3 km storm-relative helicity
41 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.

502 
WGUS51 KBOX 240022
FFWBOX
CTC013-MAC013-240215-
/O.NEW.KBOX.FF.W.0005.140524T0022Z-140524T0215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TAUNTON MA
822 PM EDT FRI MAY 23 2014

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHWESTERN TOLLAND COUNTY IN NORTHERN CONNECTICUT...
  SOUTHEASTERN HAMPDEN COUNTY IN WESTERN MASSACHUSETTS...

* UNTIL 1015 PM EDT

* AT 820 PM EDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING 
  HEAVY RAIN ACROSS THE WARNED AREA. UP TO 1.50 INCHES OF RAIN HAS 
  ALREADY FALLEN. FLASH FLOODING IS EXPECTED TO BEGIN SHORTLY.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE... 
  VERNON...MANSFIELD...EAST LONGMEADOW...ELLINGTON... 
  TOLLAND...WILBRAHAM...COVENTRY...STAFFORD...SOMERS... 
  WILLINGTON...COLUMBIA...HAMPDEN...BOLTON AND ANDOVER.

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 4211 7253 4209 7233 4171 7225 4173 7246
      4181 7247 4181 7250 4194 7251 4195 7249
      4203 7251 4203 7252

$$

FRANK
1 follow-up statement
826 
WGUS71 KBOX 240049
FFSBOX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
849 PM EDT FRI MAY 23 2014

CTC013-MAC013-240215-
/O.CON.KBOX.FF.W.0005.000000T0000Z-140524T0215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
TOLLAND CT-HAMPDEN MA-
849 PM EDT FRI MAY 23 2014

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1015 PM EDT FOR
NORTHWESTERN TOLLAND AND SOUTHEASTERN HAMPDEN COUNTIES...

AT 846 PM EDT...DOPPLER RADAR INDICATED SHOWERS AND EMBEDDED 
THUNDERSTORMS PRODUCING HEAVY RAIN ACROSS THE WARNED AREA. UP TO 
THREE INCHES OF RAIN HAVE ALREADY FALLEN JUST EAST OF BOLTON AND 
NORTH OF ANDOVER IN CONNECTICUT. FLASH FLOODING IS EXPECTED TO BEGIN 
SHORTLY...PARTICULARLY EAST OF BOLTON AND NORTH OF ANDOVER IN 
CONNECTICUT.

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 4211 7253 4209 7233 4171 7225 4173 7246
      4181 7247 4181 7250 4194 7251 4195 7249
      4203 7251 4203 7252

$$

FRANK

The office that day

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

IssuedProductOfficeCountiesLasted
May 23, 9:28 PM EDTAreal Flood AdvisoryBOXFranklin, Hampden, Hampshire2 hr
May 23, 10:14 PM EDTAreal Flood AdvisoryBOXHampden2 hr
May 24, 5:41 PM EDTSpecial Weather StatementBOXFranklin49 min

Nearby

Flash Flood Warnings in Massachusetts, 2014Flash Flood Warnings in Connecticut, 2014Every 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.