Alert archive / New Jersey / Severe Thunderstorm Warnings in 1991

Severe Thunderstorm Warning 22, NWS Philadelphia/Mount Holly

June 30, 1991Gloucester County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 30, 1991, 10:51 PM EDT for Gloucester County, New Jersey. It was in force for 39 min.

The area

The counties it named.

The facts

Issued
Jun 30, 1991, 10:51 PM EDT (02:51 UTC)
Expired
Jun 30, 1991, 11:30 PM EDT
In force
39 min
Issued by
NWS Philadelphia/Mount Holly
Area
Whole counties

County Gloucester County, NJ

The nearest sounding before it

Atlantic City In, NJ (KACY), launched 00:00Z, 2.9 hours before the alert went out and 63 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 1991-07-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 804 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°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 1991-07-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 114 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
804 J/kg
Mixed-layer CIN
-76 J/kg
Mixed-layer LCL
1420 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
114 m²/s²
0-3 km storm-relative helicity
134 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.4

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KPHL 010258
SVRPHL
NJC015-010330-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PHILADELPHIA PA
1051 PM EDT SUN JUN 30 1991
 
THE NATIONAL WEATHER SERVICE IN PHILADELPHIA HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1130 PM EDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN SOUTH NEW JERSEY
 
   ...GLOUCESTER COUNTY
 
AT 1050 PM...NATIONAL WEATHER SERVICE RADAR INDICATED AN ISOLATED
THUNDERSTORMS IN EXTREME WESTERN GLOUCESTER COUNTY. THIS THUNDERSTORM
WAS REPORTED TO BE INTENSIFYING AS IT MOVED SOUTHEAST AROUND 40 MPH.
THIS THUNDERSTORM IS EXPECTED TO MOVE ACROSS GLOUCESTER COUNTY DURING
THE NEXT 30 MINUTES.
 
THIS IS A DANGEROUS STORM.  IF YOU ARE IN THE WARNED AREA...PREPARE
FOR STRONG DAMAGING WINDS...LARGE HAIL...VERY HEAVY RAIN AND DEADLY
LIGHTNING.  SHOULD THE STORM APPROACH YOU...SEEK IMMEDIATE SHELTER
INDOORS...BUT DO NOT STAND NEAR WINDOWS.  MOBILE HOMES ARE MOST
VULNERABLE TO HIsGH WINDS AND SHOULD BE AVOIDED.

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Special weather statement, Jun 30, 5:59 PM EDT, 4 hours 52 minutes before
DEZ003-002-001-010100-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE WILMINGTON DE
557 PM EDT SUN JUN 30 1991

...SEVERE THUNDERSTORM WATCH IN EFFECT FOR DELAWARE UNTIL 9PM THIS
EVENING...

AT 545 PM EDT RADAR SHOWS SHOWERS AND ISOLATED THUNDERSTORMS OVER THE
NORTHERN HALF OF DELAWARE MOVING SOUTHEAST AT ABOUT 35 MPH. THE STORMS
WITH THE HEAVIEST RAIN AND STRONG GUSTY WINDS HAVE MOVED INTO SOUTHERN
NEW JERSEY. AS THESE STORMS PASSED THROUGH THE WILMINGTON AREA...WIND
GUST TO 55 MPH WERE RECORDED AT THE AIRPORT.

SHOWERS AND THUNDERSTORMS WILL CONTINUE OVER MUCH OF THE FIRST STATE
THIS EVENING...AND SOME MAY CONTAIN HEAVY RAIN...GUSTY WINDS AND HAIL.

ADDITIONAL STATEMENTS WILL BE ISSUED AS REQUIRED BY CHANGING
CONDITIONS.
CKD
Special weather statement, Jun 30, 6:42 PM EDT, 4 hours 9 minutes before
PAZ012-NJZ002-004-006-010100-

SPECIAL WEATHER STATEMENT - SEVERE THUNDERSTORM WATCH CANCELLATION
NATIONAL WEATHER SERVICE PHILADELPHIA PA
640 PM EDT SUN JUN 30 1991

...SEVERE THUNDERSTORM WATCH CANCELLED FOR MUCH OF SOUTHEAST
   PENNSYLVANIA...SOUTHERN NEW JERSEY...AND NORTHERN DELAWARE...

THE NATIONAL WEATHER SERVICE HAS CANCELLED THE SEVERE THUNDERSTORM WATCH
FOR THE PHILADELPHIA METROPOLITAN AREA.

THE STRONG THUNDERSTORMS THAT MOVED ACROSS THE DELAWARE VALLEY HAVE
NOW MOVED OFF THE NEW JERSEY COAST. WHILE A FEW SCATTERED SHOWERS OR
THUNDERSTORMS MAY ACCOMPANY A COLD FRONT DROPPING SOUTH ACROSS THE AREA
THIS EVENING...THE THUNDERSTORMS ARE NOT EXPECTED TO REACH SEVERE
LIMITS.

RPW

Special weather statement, Jun 30, 6:57 PM EDT, 3 hours 54 minutes before
DEZ003-002-001-010100-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE WILMINGTON DE
654 PM EDT SUN JUN 30 1991

...CANCEL THE SEVERE THUNDERSTORM WATCH FOR DELAWARE...

THE SEVERE THUNDERSTORM WATCH FOR DELAWARE HAS BEEN CANCELED...SOME
SHOWERS AND THUNDERSTORMS MAY OCCUR FOR THE NEXT SEVERAL HOURS OVER
THE FIRST STATE...HOWEVER THE THREAT OF SEVERE WEATHER HAS DIMINISHED.

THIS WILL BE THE LAST STATEMENT ON THIS EVENT.
CKD
Special weather statement, Jun 30, 7:02 PM EDT, 3 hours 49 minutes before
NJZ002>004-006-302345

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE ATLANTIC CITY NJ
635 PM EDT SUN JUN 30 1991

...SEVERE THUNDERSTORM WATCH HAS BEEN CANCELLED FOR SOUTHERN NEW JERSEY...
...SPECIAL MARINE WARNING REMAINS IN EFFECT FROM MANASQUAN INLET TO CAPE
MAY UNTIL 715 PM EDT...

AT 635 PM...NATIONAL WEATHER SERVICE RADAR INDICATED AN AREA OF SEVERE
THUNDERSTORMS WITH VERY HEAVY RAIN OVER THE OCEAN 5 TO 50 MILES EAST OF
ATLANTIC CITY NEW JERSEY. THESE THUNDERSTORMS PRODUCED WIND GUSTS TO 65
MILES AN HOUR AND MARBLE SIZED HAIL AS THEY MOVED THROUGH SOUTHERN NEW
JERSEY DURING THE LAST HOUR. OTHER THUNDERSTORMS WITH VERY HEAVY RAIN
WERE LOCATED OVER HUNTERDON AND SOMERSET COUNTIES OF NORTHERN NEW JERSEY
...AS WELL AS JUST TO THE SOUTH OF LONG ISLAND NEW YORK.

THE THUNDERSTORMS WERE MOVING SOUTHEAST AT 45 MILES AN HOUR.

SCURA
Local storm report, Jun 30, 7:33 PM EDT, 3 hours 18 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE PHILADELPHIA, PA
733 PM EDT SUN JUN 30 1991

PRELIMINARY SEVERE THUNDERSTORM REPORTS FOR SUNDAY JUNE 30 1991

TIME (EDT)   COUNTY         LOCATION         EVENT

1700         DELAWARE PA    THORNBERRY TWP   TREES DOWN GUST 60 MPH

1700         DELAWARE PA    MEDIA, RIDLEY    TREES AND WIRES DOWN

1730         SALEM NJ       PITTSGROVE       3 TREES DOWN AND WIRES
                            TOWNSHIP         D OWN

1730         GLOUCESTER NJ   WASHINGTON      NUMEROUS TREES AND WIRES
                             TOWNSHIP        DOWN
Special weather statement, Jun 30, 7:44 PM EDT, 3 hours 7 minutes before
NJZ002>004-006-010045

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE ATLANTIC CITY NJ
730 PM EDT SUN JUN 30 1991

AT 730 PM...NATIONAL WEATHER SERVICE RADAR INDICATED AN AREA OF
THUNDERSTORMS WITH VERY HEAVY RAIN OVER CENTRAL NEW JERSEY...IN
MONMOUTH COUNTY. THESE THUNDERSTORMS WILL BE MOVING INTO OCEAN COUNTY OF
NEW JERSEY DURING THE NEXT HOUR AND MAY PRODUCE GUSTY WINDS...HEAVY
DOWNPOURS AND DEADLY CLOUD TO GROUND LIGHTNING. OTHER THUNDERSTORMS WITH
VERY HEAVY RAIN CONTINUE MOVING OFFSHORE OF SOUTHERN NEW JERSEY ABOUT 70
MILES SOUTHEAST OF ATLANTIC CITY.

THE THUNDERSTORMS WERE MOVING SOUTHEAST AT 45 MILES AN HOUR.

SCURA

Nearby

Severe Thunderstorm Warnings in New Jersey, 1991Every severe thunderstorm warning in 1991

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.