Alert archive / New Jersey / Severe Thunderstorm Warnings in 1991
Severe Thunderstorm Warning 51, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Sep 17, 1991, 8:06 PM EDT for Atlantic County, Cumberland County, New Jersey. It was in force for 69 min.
The area
The counties it named.
The facts
- Issued
- Sep 17, 1991, 8:06 PM EDT (00:06 UTC)
- Expired
- Sep 17, 1991, 9:15 PM EDT
- In force
- 69 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Whole counties
Counties Atlantic County, NJ, Cumberland County, NJ
The nearest sounding before it
Atlantic City In, NJ (KACY), launched 00:00Z, 0.1 hours before the alert went out and 33 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.
- Mixed-layer CAPE
- 2704 J/kg
- Mixed-layer CIN
- -35 J/kg
- Mixed-layer LCL
- 1158 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 92 m²/s²
- 0-3 km storm-relative helicity
- 95 m²/s²
- Significant tornado parameter
- 0.8
- Supercell composite
- 5.6
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KACY 180006 SVRACY NJC001-011-180115- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE ATLANTIC CITY NJ 806 PM EDT TUE SEP 17 1991 THE NATIONAL WEATHER SERVICE IN ATLANTIC CITY HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 915 PM EDT FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN SOUTH NEW JERSEY ...ATLANTIC COUNTY...CUMBERLAND COUNTY AND FOR THE ADJACENT COASTAL WATERS AT 800 PM RADAR SHOWED A LINE OF SEVERE THUNDERSTORMS MOVING ACROSS CUMBERLAND AND ATLANTIC COUNTIES OF SOUTHERN NEW JERSEY. THESE STORMS WERE MOVING EAST AT 30 MILES AN HOUR. SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55 MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.
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, Sep 17, 6:28 PM EDT, 1 hour 38 minutes before
PAZ007>012-016-NJZ002>004-006-172330- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PHILADELPHIA PA 630 PM EDT TUE SEP 17 1991 ...SHOWERS AND THUNDERSTORMS OVER SOUTHEASTERN PENNSYLVANIA... AT 630 PM EDT NATIONAL WEATHER SERVICE RADAR WAS SHOWING A LINE OF SHOWERS AND THUNDERSTORMS FROM CENTRAL BUCKS COUNTY ACROSS CENTRAL MONTGOMERY COUNTY...NORTHERN AND WESTERN CHESTER COUNTY AND EXTREME SOUTHERN LANCASTER COUNTY IN PENNSYLVANIA. AT LEAST ONE STRONG THUNDERSTORM IS INDICATED OVER CENTRAL CHESTER COUNTY. THIS THUNDERSTORM WILL LIKELY BE ACCOMPANIED BY HEAVY DOWNPOURS AND DANGEROUS LIGHTNING. STRONG WIND GUSTS AND HAIL ARE POSSIBLE. THE SHOWERS AND THUNDERSTORMS ARE MOVING EAST AROUNDf 25 MPH. PERSONS IN THESE COUNTIES SHOULD WATCH FOR THREATENING CONDITIONS AND BE PREPARED TO TAKE COVER IF THREATENING CONDITIONS APPROACH. TCB
Special weather statement, Sep 17, 6:34 PM EDT, 1 hour 32 minutes before
DEZALL-180100- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WILMINGTON DE 635 PM EDT TUE SEP 17 1991 ...THUNDERSTORMS HEADING FOR NORTHERN DELAWARE... AT 630 PM WEATHER RADAR SHOWED A THUNDERSTORM LOCATED AROUND 20 MILES WEST OF THE NEW CASTLE COUNTY AIRPORT. IT WAS MOVING EAST AT AROUND 30 MPH AND WILL PROBABLY MOVE INTO PARTS OF NORTHERN NEW CASTLE COUNTY NEAR OR SHORTLY AFTER 7PM. IT WAS HEADING TOWARD THE CITY OF WILMINGTON AND WAS PRODUCING HEAVY RAIN AND LIGHTNING STRIKES AT THE RATE OF 53 PER HOUR. SOME BRIEF STRONG GUSTY WINDS MAY ALSO ACCOMPANY THIS THUNDERSTORM. PERSONS NEAR THIS THUNDERSTORM SHOULD BE PREPARED TO SEEK SHELTER UNTIL THE STORM PASSES. IT SHOULD BE THROUGH THE AREA BETWEEN 730 AND 8PM. SMELGUS
Special weather statement, Sep 17, 6:44 PM EDT, 1 hour 22 minutes before
NJZ002>004-172345 SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE ATLANTIC CITY NJ 628 PM EDT TUE SEP 17 1991 ...THUNDERSTORMS WITH VERY HEAVY RAIN...GUSTY WINDS AND POSSIBLE SMALL HAIL MOVING THROUGH EXTREME SOUTHEAST PENNSYLVANIA AND NORTHEAST MARYLAND... AT 628 PM...RADAR SHOWED A BAND OF THUNDERSTORMS WITH VERY HEAVY RAIN 30 MILES WIDE THAT STRETCHED FROM JUST EAST OF ALLENTOWN PENNSYLVANIA SOUTHWEST TO WESTMINSTER MARYLAND. THESE THUNDERSTORMS CAN PRODUCE VERY HEAVY DOWNPOURS...GUSTY WINDS AND EVEN SMALL HAIL AS THEY MOVE EAST DURING THE NEXT HOUR. SOME LOCALIZED FLOODING OF ROADWAYS MAY OCCUR DUE TO BRIEF...BUT HEAVY DOWNPOURS. MOVEMENT WAS EAST AT 30 MIL,ES AN HOUR. GC
Special weather statement, Sep 17, 7:11 PM EDT, 55 minutes before
DEZALL-180200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WILMINGTON DE 710 PM EDT TUE SEP 17 1991 ...THUNDERSTORMS MOVING INTO NORTHERN DELAWARE... A THUNDERSTORM WITH HEAVY DOWNPOURS AND VICIOUS-LOOKING LIGHTNING STRIKES WILL BE MOVING NEW CASTLE COUNTY IN NORTHERN DELAWARE WITHIN THE HOUR. THE STATE POLICE IN NORTHEAST MARYLAND REPORTED SOME STRONG GUSTY WINDS... HEAVY DOWNPOURS AND FREQUENT LIGHTNING WHEN IT MOVED THROUGH THAT AREA. PERSONS IN NEW CASTLE COUNTY SHOULD SEEK SHELTER UNTIL THIS STORM PASSES. DON'T TAKE A CHANCE ON GETTING STRUCK BY DEADLY LIGHTNING...GO INDOORS... IN A MALL...IN A HOUSE...IN YOUR CAR...BUT DON'T STAY OUTSIDE... SMELGUS @
Special weather statement, Sep 17, 7:16 PM EDT, 50 minutes before
DEZALL-180200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WILMINGTON DE 710 PM EDT TUE SEP 17 1991 ...THUNDERSTORMS MOVING INTO NORTHERN DELAWARE... A THUNDERSTORM WITH HEAVY DOWNPOURS AND VICIOUS-LOOKING LIGHTNING STRIKES WILL BE MOVING INTO NEW CASTLE COUNTY IN NORTHERN DELAWARE WITHIN THE HOUR. THE STATE POLICE IN NORTHEAST MARYLAND REPORTED SOME STRONG GUSTY WINDS... HEAVY DOWNPOURS AND FREQUENT LIGHTNING WHEN IT MOVED THROUGH THAT AREA. PERSONS IN NEW CASTLE COUNTY SHOULD SEEK SHELTER UNTIL THIS STORM PASSES. DON'T TAKE A CHANCE ON GETTING STRUCK BY DEADLY LIGHTNING...GO INDOORS... IN A MALL...IN A HOUSE...IN YOUR CAR...BUT DON'T STAY OUTSIDE... SMELGUS
Special weather statement, Sep 17, 7:42 PM EDT, 24 minutes before
NJZ002>004-180045 SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE ATLANTIC CITY NJ 733 PM EDT TUE SEP 17 1991 ...THUNDERSTORMS WITH VERY HEAVY RAIN...GUSTY WINDS AND POSSIBLE SMALL HAIL MOVING THROUGH EXTREME SOUTHEAST PENNSYLVANIA AND NORTHEAST MARYLAND... AT 733 PM...RADAR SHOWED A LINE OF THUNDERSTORMS WITH VERY HEAVY RAIN 25 MILES WIDE THAT STRETCHED FROM PHILADELPHIA PENNSYLVANIA SOUTHWEST THROUGH WILMINGTON DELAWARE...THEN THROUGH NORTHEAST MARYLAND INTO BALTIMORE. THESE THUNDERSTORMS CAN PRODUCE VERY HEAVY DOWNPOURS...GUSTY WINDS AND EVEN SMALL HAIL AS THEY MOVE EAST DURING THE NEXT HOUR. SOME LOCALIZED FLOODING OF ROADWAYS MAY OCCUR DUE TO BRIEF...BUT HEAVY DOWNPOURS. MOVEMENT WAS EAST AT 30 MILES AN HOUR. CHIELLINI
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.