Alert archive / New Jersey / Flash Flood Warnings in 1997

Flash Flood Warning 14, NWS Philadelphia/Mount Holly

August 20, 1997Cumberland County, New Jersey

NWS Philadelphia/Mount Holly issued this flash flood warning at Aug 20, 1997, 11:34 PM EDT for Cumberland County, New Jersey. It was in force for 3 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
Aug 20, 1997, 11:34 PM EDT (03:34 UTC)
Expired
Aug 21, 1997, 2:35 AM EDT
In force
3 hr
Issued by
NWS Philadelphia/Mount Holly
Area
Whole counties

County Cumberland County, NJ

The nearest sounding before it

Wallops Is Stn, VA (KWAL), launched 00:00Z, 3.6 hours before the alert went out and 157 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, Wallops Is Stn, VA at 00:00Z on 1997-08-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 965 joules per kilogram.LCLEL10008507005003002001001 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, Wallops Is Stn, VA at 00:00Z on 1997-08-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 90 square meters per square second.19395878Sfc1 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
965 J/kg
Mixed-layer CIN
-1 J/kg
Mixed-layer LCL
503 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
90 m²/s²
0-3 km storm-relative helicity
253 m²/s²
Significant tornado parameter
0.3
Supercell composite
2.8

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KPHL 210336
FFWPHL
NJC001-005-011-029-210635-

BULLETIN - EAS ACTIVATION REQUESTED
FLOOD WARNING
NATIONAL WEATHER SERVICE PHILADELPHIA/MOUNT HOLLY NJ
1134 PM EDT WED AUG 20 1997

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
FLOOD WARNING EFFECTIVE UNTIL 235 AM EDT
FOR PEOPLE IN THE FOLLOWING LOCATION...

IN  NEW JERSEY

   ...SOUTHEASTERN BURLINGTON COUNTY
   ...OCEAN COUNTY
   ...CUMBERLAND COUNTY
   ...ATLANTIC COUNTY
 
THUNDERSTORMS WITH HEAVY RAIN HAVE PRODUCED TWO TO THREE INCHES
OF RAIN IN ONE HOUR.  TWO INCHES OF RAIN HAS FALLEN WITHIN THE LAST
HALF HOUR AT ATLANTIC CITY INTERNATIONAL AIRPORT.  THIS HEAVY
RAIN...IN COMBINATION WITH HIGH TIDE...IS PRODUCING FLOODING ALONG
COASTAL SECTIONS OF SOUTHERN NEW JERSEY.

IF YOU ARE IN AN AREA PRONE TO FLOODING...MOVE TO HIGHER GROUND
IMMEDIATELY...BEFORE YOUR ACCESS IS CUT OFF BY RISING FLOOD WATERS.

DO NOT ATTEMPT TO DRIVE THROUGH FLOODED AREAS. THE WATER MAY BE
DEEPER THAN YOU THINK. RAPIDLY RISING WATERS CAN QUICKLY ENGULF
YOUR VEHICLE AND ITS OCCUPANTS. IF YOUR VEHICLE STALLS...ABANDON IT
AND SEEK HIGHER GROUND QUICKLY.

FOR THE LATEST STORM INFORMATION...PLEASE TUNE TO NOAA WEATHER
RADIO...YOUR LOCAL RADIO OR TELEVISIHON STATIONS...OR YOUR CABLE
TELEVISION OUTLET.

JJM/TFG
 

&

The office that day

Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 20, 11:34 PM EDTFlash Flood WarningPHIAtlantic, Burlington, Ocean3 hr
Aug 21, 2:12 AM EDTFlash Flood WarningPHIAtlantic, Cumberland3 hr
Aug 21, 2:12 AM EDTFlash Flood WarningPHIOcean3 hr
Aug 21, 5:00 AM EDTFlash Flood WarningPHIAtlantic, Ocean3 hr
Aug 21, 5:00 AM EDTFlash Flood WarningPHICumberland3 hr
Aug 21, 8:00 AM EDTFlash Flood WarningPHIAtlantic, Cumberland, Ocean3 hr

Nearby

Flash Flood Warnings in New Jersey, 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.