Alert archive / New Jersey / Severe Thunderstorm Warnings in 1987

Severe Thunderstorm Warning 40, NWS Philadelphia/Mount Holly

September 18, 1987Cumberland County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Sep 18, 1987, 4:32 PM EDT for Cumberland County, New Jersey. It was in force for 58 min.

The area

The counties it named.

The facts

Issued
Sep 18, 1987, 4:32 PM EDT (20:32 UTC)
Expired
Sep 18, 1987, 5:30 PM EDT
In force
58 min
Issued by
NWS Philadelphia/Mount Holly
Area
Whole counties

County Cumberland 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

Atlantic City In, NJ (KACY), launched 12:00Z, 8.5 hours before the alert went out and 56 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, Atlantic City In, NJ at 12:00Z on 1987-09-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 25 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, Atlantic City In, NJ at 12:00Z on 1987-09-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 113 square meters per square second.193958Sfc1 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
25 J/kg
Mixed-layer CIN
-230 J/kg
Mixed-layer LCL
889 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
113 m²/s²
0-3 km storm-relative helicity
111 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 KACY 182031
SVRACY
NJC011-182130-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ATLANTIC CITY NJ
432 PM EDT FRI SEP 18 1987
 
THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING
EFFECTIVE UNTIL 530 PM EDT FOR THE FOLLOWING COUNTY OF
 
SOUTHERN NEW JERSEY... CUMBERLAND
                                                                         
A POTENTIALLY SEVERE THUNDERSTORM WAS LOCATED 5 EAST OF SMYRNA 
DELAWARE AT 430 PM AND WAS MOVING EAST AT 25 MILES AN HOUR. 
THIS WILL CROSS THE UPPER PART OF THE DELAWARE BAY AND MOVE INTO 
CUMBERLAND COUNTY PASSING A LITTLE SOUTH OF MILLVILLE. 
 
THIS IS A DANGEROUS STORM AND PEOPLE IN THE WARNED AREA SHOULD
PREPARE FOR STRONG DAMAGING WINDS...LARGE HAIL...VERY HEAVY RAIN
AND LIGHTNING.  SHOULD THE STORM APPROACH YOU...SEEK IMMEDIATE
SHELTER.  MOBILE TRAILERS ARE MOST VULNERABLE TO HIGH WINDS AND
SHOULD BE AVOIDED.
 
RKG

Nearby

Severe Thunderstorm Warnings in New Jersey, 1987Every severe thunderstorm 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.