Alert archive / Massachusetts / Flash Flood Warnings in 1997

Flash Flood Warning 2, NWS Boston/Norton, MA

July 15, 1997Hampden County, Massachusetts

NWS Boston/Norton, MA issued this flash flood warning at Jul 15, 1997, 3:19 PM EDT for Hampden 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
Jul 15, 1997, 3:19 PM EDT (19:19 UTC)
Expired
Jul 15, 1997, 7:30 PM EDT
In force
4 hr
Issued by
NWS Boston/Norton, MA
Area
Whole counties

County Hampden County, MA

The radar

The Boston radar (KBOX), 125 km from the middle of the area, began a volume at 19:22 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, 7.3 hours before the alert went out and 116 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 1997-07-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1020 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 1997-07-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 24 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
1020 J/kg
Mixed-layer CIN
-62 J/kg
Mixed-layer LCL
794 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
24 m²/s²
0-3 km storm-relative helicity
46 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.

000 
TTAA00 KBOS 151920
FFWBOS
MAC013-152330-
 
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TAUNTON MA
319 PM EDT TUE JUL 15 1997
 
THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL  730 PM EDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN WEST MASSACHUSETTS
 
   ...WESTERN HAMPDEN COUNTY
 
A CLUSTER OF SLOW MOVING THUNDERSTORMS WITH TORRENTIAL RAINS WILL DUMP
ENOUGH RAINFALL TO CAUSE SOME OF THE SMALL STREAMS IN WESTERN HAMPDEN
COUNTY TO FLOOD. AT 320 PM WEATHER SERVICE RADAR ESTIMATED OVER 2 INCHES
OF RAIN IN JUST ONE HOUR OVER WESTERN HAMPDEN COUNTY...ESPECIALLY NEAR
AND JUST TO THE NORTHWEST OF THE COBBLE MOUNTAIN RESERVOIR. THIS STORM
CONTINUES TO DEVELOP WITH VERY SLOW MOVEMENT.
 
A FLASH FLOOD WARNING MEANS THAT FLOODING IS OCCURRING OR IS
IMMINENT.  MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES.  DO NOT
ATTEMPT TO CROSS BRIDGES...DIPS...OR LOW SPOTS IF WATER COVERS
THE ROADWAY.  NEVER TRY TO CROSS A FLOWING STREAM...EVEN A SMALL
ONE...ON FOOT.  TO ESCAPE RISING WATER MOVE UP TO HIGHER GROUND.
 
LJC/RMT

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 15, 2:53 PM EDTSevere Thunderstorm WarningBOXHampden52 min

Nearby

Flash Flood Warnings in Massachusetts, 1997Every flash flood warning in 1997

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.