Alert archive / Massachusetts / Flash Flood Warnings in 2003

Flash Flood Warning 21, NWS Boston/Norton, MA

September 28, 2003Franklin County, Massachusetts

NWS Boston/Norton, MA issued this flash flood warning at Sep 28, 2003, 2:10 PM EDT for Franklin County, Massachusetts. It was in force for 4 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Sep 28, 2003, 2:10 PM EDT (18:10 UTC)
Expired
Sep 28, 2003, 6:30 PM EDT
In force
4 hr
Issued by
NWS Boston/Norton, MA
Area
Whole counties

County Franklin County, MA

The radar

The Albany radar (KENX), 121 km from the middle of the area, began a volume at 18:13 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, 6.2 hours before the alert went out and 102 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 2003-09-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 237 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 2003-09-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 214 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
237 J/kg
Mixed-layer CIN
-2 J/kg
Mixed-layer LCL
524 m above ground
0-6 km bulk shear
53 kt
0-1 km storm-relative helicity
214 m²/s²
0-3 km storm-relative helicity
219 m²/s²
Significant tornado parameter
0.2
Supercell composite
1.1

Open this sounding in Storm Lab

The text

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

000 
WGUS51 KBOX 281812
FFWBOX
MAC011-282215-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TAUNTON MA
210 PM EDT SUN SEP 28 2003

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  FRANKLIN COUNTY IN WESTERN MASSACHUSETTS
    INCLUDING GREENFIELD

* UNTIL 630 PM EDT.

* AT 210 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  SHOWERS WITH TORRENTIAL RAINFALL CONTINUING OVER MUCH OF FRANKLIN
  COUNTY...AND EXTENDING SOUTH THROUGH MUCH OF THE CONNECTICUT RIVER
  VALLEY.

  ALTHOUGH THE HEAVIEST RAIN WILL TAPER OFF BY 4 PM...RUNOFF WILL
  LIKELY CAUSE SMALLER RIVERS AND STREAMS TO RISE OUT OF THEIR 
  BANKS.  SIGNIFICANT STREET FLOODING IS ALSO EXPECTED. 

FLASH FLOODING OF POOR DRAINAGE AREAS IS LIKELY DUE TO THE TORRENTIAL
RAINFALL. CULVERTS ALONG ROADSIDES MAY BE WASHED OUT. STANDING WATER
ON ROADWAYS AND ESPECIALLY UNDERPASSES MAY RISE TO SEVERAL FEET IN
DEPTH SUBMERGING MOST VEHICLES.

$$

LAT...LON 4273 7288 4272 7231 4265 7223 4251 7229
          4242 7229 4249 7278 4256 7295

JWD
1 follow-up statement
000 
WGUS71 KBOX 281955
FFSBOX
CTC003-MAC011-013-015-282245-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
355 PM EDT SUN SEP 28 2003

...RAINFALL WILL DIMINISH THROUGH THIS EVENING IN THE CONNECTICUT 
RIVER VALLEY...

FLASH FLOOD WARNINGS REMAIN IN EFFECT UNTIL 630 PM FOR HARTFORD 
COUNTY CONNECTICUT...AND FOR HAMPDEN...HAMPSHIRE AND FRANKLIN 
COUNTIES IN WESTERN MASSACHUSETTS.

THE HEAVIEST RAIN HAS ENDED IN THE CONNECTICUT RIVER VALLEY...BUT 
ANOTHER ONE HALF TO ONE INCH OF RAIN CAN BE EXPECTED BEFORE THE 
SHOWERS END THIS EVENING.  FLOOD WATERS WILL SLOWLY SUBSIDE THIS 
EVENING.

AS OF 345 PM...MANY COMMUNITIES NEAR THE CONNECTICUT RIVER FROM 
WESTERN MASSACHUSETTS INTO NORTHERN CONNECTICUT REPORTED SIGNIFICANT 
URBAN FLOODING...WITH SEVERAL FEET OF WATER ON SOME ROADWAYS AND 
SOME VEHICLES STRANDED BY FLOOD WATERS.

SEVERAL SMALLER RIVERS AND STREAMS WERE ALSO OUT OF THEIR BANKS.
IN HADLEY MASSACHUSETTS...FORT RIVER AND RUSSELL BROOK WERE FLOODING 
NEARBY FARMLAND.  IN NEW BRITAIN CONNECTICUT...WILLOW BROOK WAS OUT 
OF ITS BANKS AND WAS FLOODING WILLOW BROOK PARK.

NEVER ATTEMPT TO CROSS BRIDGES OR ROADS WHERE WATER COVERS THE 
ROADWAY. IT ONLY TAKES A FOOT OR TWO OF WATER TO WASH MOST CARS AWAY.

$$

JWD

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 28, 10:20 AM EDTFlash Flood WarningBOXHampden3 hr
Sep 28, 12:35 PM EDTFlash Flood WarningBOXHampden, Hampshire6 hr
Sep 28, 6:32 PM EDTFlash Flood WarningBOXFranklin, Hampden, Hampshire58 min

Nearby

Flash Flood Warnings in Massachusetts, 2003Every flash flood warning in 2003

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.