Alert archive / New Jersey / Severe Thunderstorm Warnings in 1991
Severe Thunderstorm Warning 18, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 30, 1991, 2:43 PM EDT for Burlington County, New Jersey. It was in force for 62 min.
The area
The counties it named.
The facts
- Issued
- Jun 30, 1991, 2:43 PM EDT (18:43 UTC)
- Expired
- Jun 30, 1991, 3:45 PM EDT
- In force
- 62 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Whole counties
County Burlington County, NJ
The nearest sounding before it
Atlantic City In, NJ (KACY), launched 12:00Z, 6.7 hours before the alert went out and 50 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 301844 SVRACY NJC005-301945- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE ATLANTIC CITY NJ 243 PM EDT SUN JUN 30 1991 THE NATIONAL WEATHER SERVICE IN ATLANTIC CITY HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 345 PM EDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN SOUTH NEW JERSEY ...BURLINGTON COUNTY AND FOR THE ADJACENT COASTAL WATERS AT 240 PM EDT...RADAR INDICATED A SEVERE THUNDERSTORM IN THE NORTHERN HALF OF BURLINGTON COUNTY ABOUT 10 MILES SOUTHWEST OF MCGUIRE AIR FORCE BASE. THIS STORM WAS MOVING SOUTHEAST AT ABOUT 40 MILES AN HOUR. IT WILL CONTINUE MOVING THROUGH BURLINGTON COUNTY OVER THE NEXT 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. SJG/JH
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, 10:57 AM EDT, 3 hours 46 minutes before
SPECIAL WEATHER STATEMENT - THUNDERSTORM POTENTIAL NATIONAL WEATHER SERVICE PHILADELPHIA PA 1055 AM EDT SUN JUN 30 1991 ...THUNDERSTORM POTENTIAL STATEMENT FOR EASTERN PENNSYLVANIA AND SOUTHERN NEW JERSEY... SHOWERS AND THUNDERSTORMS OVER NORTHWEST PENNSYLVANIA EXTEND EAST SOUTHEAST INTO THE MIDDLE AND UPPER SUSQUEHANNA VALLEYS LATE THIS MORNING. THEY ARE OUT AHEAD OF A COLD FRONT DROPPING SOUTH FROM JUST NORTH OF THE NEW YORK BORDER. THE THUNDERSTORMS ARE EXPECTED TO INTENSIFY AS THEY MOVE SOUTHEAST AT 30 TO 40 MILES AN HOUR INTO A VERY UNSTABLE AIRMASS. SOME OF THE THUNDERSTORMS MAY REACH SEVERE LIMITS AND BE ACCOMPANIED BY STRONG DAMAGING WINDS...LARGE HAIL... TORRENTIAL DOWNPOURS...AND EXTREMELY DANGEROUS LIGHTNING. THE AREAS MOST SUSCEPTABLE FOR THESE CONDITIONS WILL BE SOUTHEASTERN PENNSYLVANIA AND SOUTHERN NEW JERSEY. 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, 11:45 AM EDT, 2 hours 58 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, 2 hours 57 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
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, 5:06 PM EDT | Severe Thunderstorm Warning | PHI | Gloucester, Salem | 54 min |
| Jun 30, 5:19 PM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Cumberland | 56 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; the sounding from the Mesonet's radiosonde archive.