Alert archive / New Jersey / Flash Flood Warnings in 1987

Flash Flood Warning 6, NWS Philadelphia/Mount Holly

October 27, 1987Mercer County, New Jersey

NWS Philadelphia/Mount Holly issued this flash flood warning at Oct 27, 1987, 11:21 PM EST for Mercer County, New Jersey. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued
Oct 27, 1987, 11:21 PM EST (04:21 UTC)
Expired
Oct 28, 1987, 2:00 AM EST
In force
3 hr
Issued by
NWS Philadelphia/Mount Holly
Area
Whole counties

County Mercer County, NJ

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

Wallops Is Stn, VA (KWAL), launched 00:00Z, 4.4 hours before the alert went out and 268 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 1987-10-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 32 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, Wallops Is Stn, VA at 00:00Z on 1987-10-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 258 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
32 J/kg
Mixed-layer CIN
-81 J/kg
Mixed-layer LCL
543 m above ground
0-6 km bulk shear
43 kt
0-1 km storm-relative helicity
258 m²/s²
0-3 km storm-relative helicity
322 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.2

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KPHL 280421
FFWPHL
NJC021-280700-

BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED 
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE PHILADELPHIA PA
1121 PM EST TUE OCT 27 1987

THE NATIONAL WEATHER SERVICE HAS ISSUED A FLASH FLOOD WARNING 
EFFECTIVE UNTIL 200 AM EST FOR PEOPLE IN THE FOLLOWING COUNTY OF

WEST CENTRAL NEW JERSEY...MERCER

HEAVY RAINS OF UP TO 2 3/4 INCHES OF RAIN HAVE FALLEN OVER MERCER
COUNTY NEW JERSEY. DUE TO THESE HEAVY RAINS...THE ASSUNPINK
CREEK WILL GO OVER FLOOD STAGE BY MIDNIGHT AND CONTINUE OVER
FLOOD STAGE FOR A COUPLE HOURS BEFORE RECEEDING RAPIDLY.

A FLASH FLOOD WARNING MEANS FLOODING IS IMMINENT

IF YOU ARE IN THE WARNED COUNTY IN AN AREA SUBJECT TO FLKOODING
MOVE TO HIGHER GROUND. DO NOT DRIVE THROUGH FLOOD WATERS. CLIMBING
ATOP YOUR STALLED VEHICLE WILL NOT PREVENT YOU FROM BEING SWEPT
INTO DANGEROUS STREAM CONDITIONS AS WATER LEVELS RISE.

 RNS/JG

Nearby

Flash Flood Warnings in New Jersey, 1987Every flash flood warning in 1987

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.