Alert archive / New Jersey / Severe Thunderstorm Warnings in 1991
Severe Thunderstorm Warning 50, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Sep 17, 1991, 7:46 PM EDT for Gloucester County, Salem County, New Jersey. It was in force for 59 min. 2 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Sep 17, 1991, 7:46 PM EDT (23:46 UTC)
- Expired
- Sep 17, 1991, 8:45 PM EDT
- In force
- 59 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Whole counties
Counties Gloucester County, NJ, Salem County, NJ
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Sep 17, 7:52 PM EDT | Hail 1 | Salem, NJ | |
| Sep 17, 8:30 PM EDT | Thunderstorm Wind 0 | Gloucester, NJ |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.
The nearest sounding before it
Atlantic City In, NJ (KACY), launched 12:00Z, 11.8 hours before the alert went out and 68 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
- 1502 J/kg
- Mixed-layer CIN
- -110 J/kg
- Mixed-layer LCL
- 988 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 57 m²/s²
- 0-3 km storm-relative helicity
- 61 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.9
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
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 18 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 12 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 2 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, 35 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, 30 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, 4 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.