Alert archive / New Jersey / Severe Thunderstorm Warnings in 1989

Severe Thunderstorm Warning 55, NWS Philadelphia/Mount Holly

November 20, 1989Ocean County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Nov 20, 1989, 9:28 PM EST for Ocean County, New Jersey. It was in force for 2 hr.

The area

The counties it named.

The facts

Issued
Nov 20, 1989, 9:28 PM EST (02:28 UTC)
Expired
Nov 20, 1989, 11:30 PM EST
In force
2 hr
Issued by
NWS Philadelphia/Mount Holly
Area
Whole counties

County Ocean 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 00:00Z, 2.5 hours before the alert went out and 51 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 00:00Z on 1989-11-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 00:00Z on 1989-11-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 102 square meters per square second.1939587897117Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1712 m above ground
0-6 km bulk shear
53 kt
0-1 km storm-relative helicity
102 m²/s²
0-3 km storm-relative helicity
197 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 210229
SVRACY
NJC001-011-029-210430-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM AND SPECIAL MARINE WARNING
NATIONAL WEATHER SERVICE ATLANTIC CITY NJ
928 PM EST MON NOV 20 1989
 
THE NATIONAL WEATHER SERVICE IN ATLANTIC CITY HAS ISSUED A
SEVERE THUNDERSTORM WARNING AND
SPECIAL MARINE WARNING EFFECTIVE UNTIL 1130 PM EST
FOR PEOPLE IN THE FOLLOWING COUNTIES...
 
IN SOUTH NEW JERSEY
          ...ATLANTIC...CUMBERLAND...OCEAN
 
AND ADJACENT COASTAL WATERS.
 
 
A LINE OF THUNDERSTORMS IS MOVING INTO NEW JERSEY AT THIS TIME. WIND
GUSTS IN EXCESS OF 60 MPH WERE REPORTED OVER SOUTHEASTERN
PENNSYLVANINA.
THE THUNDERSTORMS WERE MOVING SOUTHEAST AT 50 MPH AND WILL MOVE INTO
THE WARNED COUNTIES IN THE NEXT HOUR.
 
 
THIS IS A DANGEROUS STORM.  IF YOU ARE IN ITS PATH YOU SHOULD
PREPARE FOR DAMAGING WIND IN EXCESS OF 55 MPH...LARGE HAIL...AND
DEADLY LIGHTNING.  PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT STAY AWAY FROM WINDOWS.
 
GOGNIAT

The office that day

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

IssuedProductOfficeCountiesLasted
Nov 20, 8:55 PM ESTSevere Thunderstorm WarningPHIMercer65 min
Nov 20, 9:15 PM ESTSevere Thunderstorm WarningPHIBurlington, Camden60 min
Nov 20, 9:15 PM ESTSevere Thunderstorm WarningPHIGloucester, Salem60 min
Nov 20, 9:28 PM ESTSevere Thunderstorm WarningPHIAtlantic, Cumberland77 min
Nov 20, 9:56 PM ESTSevere Thunderstorm WarningPHICape May2 hr

Nearby

Severe Thunderstorm Warnings in New Jersey, 1989Every severe thunderstorm warning in 1989

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.