Alert archive / New Jersey / Severe Thunderstorm Warnings in 1991
Severe Thunderstorm Warning 20, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 30, 1991, 5:19 PM EDT for Atlantic County, Cumberland County, New Jersey. It was in force for 56 min. 3 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
- Jun 30, 1991, 5:19 PM EDT (21:19 UTC)
- Expired
- Jun 30, 1991, 6:15 PM EDT
- In force
- 56 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Whole counties
Counties Atlantic County, NJ, Cumberland County, NJ
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jun 30, 5:50 PM EDT | Thunderstorm Wind 0 | Cumberland, NJ | |
| Jun 30, 5:50 PM EDT | Thunderstorm Wind 0 | Atlantic, NJ | |
| Jun 30, 6:00 PM EDT | Thunderstorm Wind 0 | Atlantic, 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, 9.3 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
- 888 J/kg
- Mixed-layer CIN
- -55 J/kg
- Mixed-layer LCL
- 1352 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 44 m²/s²
- 0-3 km storm-relative helicity
- 97 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 1.1
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KACY 302120 SVRACY NJC001-011-302215- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE ATLANTIC CITY NJ 519 PM EDT SUN JUN 30 1991 THE NATIONAL WEATHER SERVICE IN ATLANTIC CITY HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 615 PM EDT FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN SOUTH NEW JERSEY ...ATLANTIC COUNTY...CUMBERLAND COUNTY AND FOR THE ADJACENT COASTAL WATERS NATIONAL WEATHER SERVICE RADAR AT 515 PM HAS DETECTED AN AREA OF SEVERTHUNDERSTORMS MOVING ACROSS SOUTHWESTERN NEW JERSEY. THESE THUNDERSTORMS HAVE A HISTORY OF PRODUCING WIND GUSTS IN EXCESS OF 55 MILES AN HOUR NEAR WILMINGTON DELAWARE. THIS AREA WILL MOVE INTO THE WARNED AREA SHORTLY. THE THUNDERSTORMS WERE MOVING SOUTHEAST AT 45 MILES AN HOUR. IF THREATENING WEATHER APPROACHES YOU SHOULD GO TO A SAFE PLACE PLACE IMMEDIATELY AND ASK THE NEAREST LAW ENFORCEMENT AGENCY TO RELAY YOUR SEVERE WEATHER REPORTS TO THE LOCAL NATIONAL WEATHER SERVICE OFFICE. 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. SCURA/HAYES
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, 11:45 AM EDT, 5 hours 34 minutes before
PAZ011-016-301745- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ALLENTOWN PA 1145 AM EDT SUN JUN 30 1991 ...SHOWERS AND THUNDERSTORMS MOVING TOWARDS EAST CENTRAL PENNSYLVANIA AND THE POCONOS... SHOWERS AND THUNDERSTORMS WHICH ARE OCCURING AHEAD OF A SLOW MOVING COLD FRONT WHICH IS LOCATED NEAR THE PENNSYLVANIA...NEW YORK BORDER ARE MOVING TOWARDS EAST CENTRAL PENNSYLVANIA AND THE POCONOS. A LARGE AREA OF SHOWERS AND THUNDERSTORMS ARE LOCATED FROM WILLIAMSPORT TO HAZELTON PENNSYLVANIA. THESE SHOWERS AND THUNDERSTORMS ARE MOVING TOWARDS THE SOUTHEAST AT ABOUT 30 TO 40 MPH. SOME OF THESE SHOWERS AND THUNDERSTORMS MAY REACH SEVERE LIMITS AS THEY MOVE FURTHER SOUTH INTO VERY UNSTABLE AIR AND MAY BE ACCOMPANIED BY STRONG WIND...HEAVY RAIN... DANGEROUS LIGNTNING AND HAIL. PERSONS IN EAST CENTRAL PENNSYLVANIA AND THE POCONOS SHOULD BE ON THE ALERT THIS AFTERNOON FOR THREATENING WEATHER AND IF SIGHTED BE PREPARED TO MOVE TO A PLACE OF SAFETY. STAY TUNED TO YOUR LOCAL RADIO AND TV STATIONS AND NOAA WEATHER RADIO FOR FURTHER STATEMENTS AND POSSIBLE WARNINGS AS CONDITIONS WARRANT. GIANNETTA
Special weather statement, Jun 30, 11:46 AM EDT, 5 hours 33 minutes before
PAZ011-016-301745- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ALLENTOWN PA 1145 AM EDT SUN JUN 30 1991 ...SHOWERS AND THUNDERSTORMS MOVING TOWARDS EAST CENTRAL PENNSYLVANIA AND THE POCONOS... SHOWERS AND THUNDERSTORMS WHICH ARE OCCURING AHEAD OF A SLOW MOVING COLD FRONT WHICH IS LOCATED NEAR THE PENNSYLVANIA...NEW YORK BORDER ARE MOVING TOWARDS EAST CENTRAL PENNSYLVANIA AND THE POCONOS. A LARGE AREA OF SHOWERS AND THUNDERSTORMS ARE LOCATED FROM WILLIAMSPORT TO HAZELTON PENNSYLVANIA. THESE SHOWERS AND THUNDERSTORMS ARE MOVING TOWARDS THE SOUTHEAST AT ABOUT 30 TO 40 MPH. SOME OF THESE SHOWERS AND THUNDERSTORMS MAY REACH SEVERE LIMITS AS THEY MOVE FURTHER SOUTH INTO VERY UNSTABLE AIR AND MAY BE ACCOMPANIED BY STRONG WIND...HEAVY RAIN... DANGEROUS LIGNTNING AND HAIL. PERSONS IN EAST CENTRAL PENNSYLVANIA AND THE POCONOS SHOULD BE ON THE ALERT THIS AFTERNOON FOR THREATENING WEATHER AND IF SIGHTED BE PREPARED TO MOVE TO A PLA CE OF SAFETY. STAY TUNED TO YOUR LOCAL RADIO AND TV STATIONS AND NOAA WEATHER RADIO FOR FURTHER STATEMENTS AND POSSIBLE WARNINGS AS CONDITIONS WARRANT. GIANNETTA
Special weather statement, Jun 30, 3:53 PM EDT, 1 hour 26 minutes before
SPECIAL WEATHER STATEMENT - THUNDERSTORM UPDATE NATIONAL WEATHER SERVICE PHILADELPHIA PA 352 PM EDT SUN JUN 30 1991 ...THUNDERSTORMS MOVING ACROSS SOUTH CENTRAL PENNSYLVANIA... AT 345 PM EDT NATIONAL WEATHER SERVICE RADAR SHOWED STRONG THUNDERSTORMS OVER PORTIONS OF LANCASTER COUNTY IN SOUTHCENTRAL PENNSYLVANIA. THESE STORMS WERE MOVING SOUTHEAST AT AROUND 35 MILES AN HOUR AND WILL CROSS CHESTER COUNTY BETWEEN 4 AND 6 PM. SOME OF THE THUNDERSTORMS MAY BE ACCOMPANIED BY STRONG DAMAGING WINDS...LARGE HAIL...TORRENTIAL DOWNPOURS...AND EXTREMELY DANGEROUS LIGHTNING. AND REMEMBER...IF YOU SEE ANY SIGNS OF SEVERE WEATHER...GET INDOORS IMMEDIATELY. STAY TUNED TO NOAA WEATHER RADIO...OR YOUR LOCAL RADIO OR TELEVISION STATION FOR ADDITIONAL STATEMENTS OR POSSIBLE WATCHES OR WARNINGS. RPW
Special weather statement, Jun 30, 4:12 PM EDT, 1 hour 7 minutes before
DEZ003-002-001-302315- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WILMINGTON DE 409 PM EDT SUN JUN 30 1991 ...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR DELAWARE UNTIL 9PM EDT THIS EVENING... A SEVERE THUNDERSTORM WATCH MEANS THAT CONDITIONS ARE FAVORABLE FOR SEVERE THUNDERSTORMS IN AND NEAR THE WATCH AREA. IN DELAWARE THE WATCH INCLUDES NEW CASTLE KENT AND SUSSEX COUNTIES AND ADJOINING COASTAL WATERS. AT 4PM EDT NATIONAL WEATHER SERVICE RADAR SHOWS A CLUSTER OF SHOWERS AND THUNDERSTORMS IN SOUTHEAST PENNSYLVANIA MOVING SOUTHEAST AT ABOUT 35 MPH. THESE STORMS WILL MOVE INTO NORTHERN NEW CASTLE COUNTY BETWEEN NOW AND 5PM...THEN MOVE SOUTHWARD ACROSS THE STATE. IF A STORM O@CCURS IN YOUR AREA...YOU CAN EXPECT STRONG GUSTY WINDS IN EXCES OF 50 MPH...HEAVY RAIN...DANGEROUS LIGHTNING AND POSSIBLE HAIL. ADDITIONAL STATEMENTS WILL BE ISSUED AS CONDITIONS WARRENT. CKD
Special weather statement, Jun 30, 4:52 PM EDT, 27 minutes before
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
Special weather statement, Jun 30, 4:54 PM EDT, 25 minutes before
PAZ012-NJZ002-004-006-010100- SPECIAL WEATHER STATEMENT - SEVERE THUNDERSTORM WATCH NATIONAL WEATHER SERVICE PHILADELPHIA PA 500 PM EDT SUN JUN 30 1991 ...SEVERE THUNDERSTORM WATCH IN EFFECT FOR MUCH OF SOUTHEAST PENNSYLVANIA...SOUTHERN NEW JERSEY...AND NORTHERN DELAWARE UNTIL 9 PM EDT... THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WATCH FOR THE PHILADELPHIA METROPOLITAN AREA. THIS INCLUDES ALL OF SOUTHEAST PENNSYLVANIA EXCEPT FOR BUCKS COUNTY...ALL OF SOUTHERN NEW JERSEY EXCEPT FOR MERCER COUNTY...AND NEW CASTLE COUNTY IN DELAWARE. THE WATCH WILL REMAIN IN EFFECT UNTIL 9 PM EDT. AT 445 PM EDT NATIONAL WEATHER SERVICE RADAR SHOWED STRONG THUNDERSTORMS OVER PORTIONS OF CHESTER...DELAWARE...MONTGOMERY...AND PHILADELPHIA COUNTIES IN PENNSYLVANIA AND IN NORTHERN NEW CASTLE COUNTY IN DELAWARE. THE THUNDERSTORMS ARE MOVING SOUTHEAST AT 40 MILES AN HOUR AND MAY BE ACCOMPANIED BY STRONG DAMAGING WINDS...LARGE HAIL...TORRENTIAL DOWNPOURS...AND EXTREMELY DANGEROUS LIGHTNING. AND REMEMBER...IF YOU SEE ANY SIGNS OF SEVERE WEATHER...GET INDOORS IMMEDIATELY. STAY TUNED TO NOAA WEATHER RADIO...OR YOUR LOCAL RADIO OR TELEVISION STATION FOR ADDITIONAL STATEMENTS OR POSSIBLE WARNINGS. RPW
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 30, 2:16 PM EDT | Severe Thunderstorm Warning | PHI | Ocean | 59 min |
| Jun 30, 2:43 PM EDT | Severe Thunderstorm Warning | PHI | Burlington | 62 min |
| Jun 30, 5:06 PM EDT | Severe Thunderstorm Warning | PHI | Gloucester, Salem | 54 min |
| Jun 30, 5:26 PM EDT | Severe Thunderstorm Warning | PHI | Ocean | 64 min |
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.