Alert archive / New Jersey / Severe Thunderstorm Warnings in 1991

Severe Thunderstorm Warning 42, NWS Philadelphia/Mount Holly

August 3, 1991Burlington County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 3, 1991, 8:11 PM EDT for Burlington County, New Jersey. It was in force for 49 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
Aug 3, 1991, 8:11 PM EDT (00:11 UTC)
Expired
Aug 3, 1991, 9:00 PM EDT
In force
49 min
Issued by
NWS Philadelphia/Mount Holly
Area
Whole counties

County Burlington County, NJ

What was reported inside it

TimeReportWhereRemark
Aug 3, 8:40 PM EDTThunderstorm Wind 0Burlington, NJ
Aug 3, 9:00 PM EDTThunderstorm Wind 0Burlington, 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 00:00Z, 0.2 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.

Skew-T log-pSkew-T log-p diagram, Atlantic City In, NJ at 00:00Z on 1991-08-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 672 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°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 1991-08-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 43 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
672 J/kg
Mixed-layer CIN
-132 J/kg
Mixed-layer LCL
1325 m above ground
0-6 km bulk shear
42 kt
0-1 km storm-relative helicity
43 m²/s²
0-3 km storm-relative helicity
120 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.3

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KPHL 040010
SVRPHL
NJC005-040100-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PHILADELPHIA PA
811 PM EDT SAT AUG 3 1991
 
THE NATIONAL WEATHER SERVICE IN PHILADELPHIA HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  900 PM EDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN SOUTH NEW JERSEY
 
   ...BURLINGTON COUNTY
 
AT 800 PM WEATHER SERVICE RADAR SHOWED THUNDERSTORMS IN
PHILADELPHIA COUNTY PENNSYLVANIA MOVING EAST TOWARD BURLINGTON
COUNTY NEW JERSEY.  THESE THUNDERSTORMS HAVE PRODUCED GUSTY
WINDS AND HAIL UP TO 1 INCH IN DIAMETER.
 
 
THIS IS A DANGEROUS STORM.  IF YOU ARE IN THE WARNED AREA...PREPARE
FOR STRONG DAMAGING WINDS...LARGE HAIL...V?ERY 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 HIGH 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, Aug 3, 4:23 PM EDT, 3 hours 48 minutes before
NJZ002>004-032130

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ATLANTIC CITY NJ
410 PM EDT SAT AUG 3 1991

AT 410 PM...THE ATLANTIC CITY WEATHER RADAR SHOWED A LARGE THUNDER-
STORM OVER BARNEGAT IN OCEAN COUNTY OF SOUTHERN NEW JERSEY.
THIS STORM IS MOVING TOWARD THE EAST AT 10 MILES AN HOUR.
VERY HEAVY RAINS...DANGEROUS LIGHTNING AND BRIEF BUT STRONG WINDS
ARE POSSIBLE WITH THIS STORM.

PERSONS ON THE BEACHES OR ON THE OPEN OCEAN WILL HAVE fTO WATCH FOR
THIS STORM AND TAKE COVER WHEN MOVES INTO YOUR AREA.

MCDONALD
Special weather statement, Aug 3, 4:31 PM EDT, 3 hours 40 minutes before
PAZ007>12-016-032200-

SPECIAL WEATHER STATEMENT - THUNDERSTORM
NATIONAL WEATHER SERVICE PHILADELPHIA PA
430 PM EST SAT AUG 3 1991

...THUNDERSTORM NEAR PENNSYLVANIA...DELAWARE BORDER MOVING TOWARD
   WESTERN SALEM AND SOUTHWEST GLOUCESTER COUNTIES IN NEW JERSEY...

     AT 430 PM WEATHER SERVICE RADAR SHOWED A THUNDERSTORM IN NORTHERN
DELAWARE NEAR THE PENNSYLVANIA BORDER.  THIS THUNDERSTORM WAS MOVING
VERY SLOWLY EAST AND MAY BE PRODUCING SOME LOCALLY HEAVY RAIN.  GUSTY
WINDS AND CLOUD TO GROUND LIGHTNING MAY ALSO BE ACCOMPANYING THIS
THUNDERSTORM.

     THE THUNDERSTORM WILL CONTINUE TO MOVE SLOWLY EAST AND WILL
REACH SALEM OR SOUTHWEST GLOUCESTER COUNTY IN NEW JERSEY BEFORE 5 PM.
PERSONS ENGAGED IN OUTDOOR ACTIVITIES IN THESE TWO COUNTIES OF
NEW JERSEY SHOULD BE ALERT FOR THE APPROACH OF THIS STORM AND READY TO
MOVE INDOORS IF NECESSARY.
Special weather statement, Aug 3, 6:54 PM EDT, 1 hour 17 minutes before
PAZ007>12-016-032200-

SPECIAL WEATHER STATEMENT - THUNDERSTORMS IN PHILA AREA
NATIONAL WEATHER SERVICE PHILADELPHIA PA
650 PM EST SAT AUG 3 1991

...THUNDERSTORMS MOVING INTO PHILADELPHIA AREA FROM THE WEST...

     AT 645 PM WEATHER SERVICE RADAR SHOWED THUNDERSTORMS FROM CENTRAL
CHESTER COUNTY PENNSYLVANIA TO NORTHERN CHESAPEAKE BAY TO NEAR
BALTIMORE MARYLAND.  THESE THUNDERSTORMS WERE MOVING EAST AROUND 15
MPH AND WILL AFFECT PARTS SOUTHEASTERN PENNSYLVANIA UNTIL AROUND 730
PM.  THESE THUNDERSTORMS MAY CAUSE LOCALLY HEAVY RAIN AND GUSTY
WINDS...AND MAY BE ACCOMPANIED BY DANGEROUS CLOUD TO GROUND LIGHTNING.

     IF OUT OF DOORS WHEN THUNDERSTORMS APPROACH...SEEK SHELTER IN
A NEARBY BUILDING OR IN YOUR CAR.

SP
Special weather statement, Aug 3, 7:04 PM EDT, 1 hour 7 minutes before
DEZ003-002-001-040200-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE WILMINGTON DE
701 PM EDT SAT AUG 3 1991

AT 7PM EDT RADAR SHOWS A THUNDERSTORM WITH HEAVY RAIN JUST WEST OF
NORTHERN NEW CASTLE COUNTY OF DELAWARE. THIS STORM IS MOVING
SOUTHEASTERLY AT ABOUT 30 MPH AND WILL AFFECT PORTIONS OF NEW CASTLE
COUNTY DURING THE NEXT HOUR.

IF THIS STORM PASSES YOUR AREA...YOU CAN EXPECT LOCALLY HEAVY RAIN
BRIEF GUSTY WINDS IN EXCESS OF 40 MPH AND DANGEROUS LIGHTNING.

BOATERS ON THE UPPER DELAWARE BAY SHOULD STAY ALERT FOR AND AVOID THIS
STORM.

ANOTHER AREA OF THUNDERSTORMS ARE OVER THE UPPER CHESAPEAKE BAY AND
WILL LIKELY MOVE INTO PORTIONS OF CENTRAL DELAWARE BETWEEN 8 AND 9 PM
SEDT THIS EVEING.

ADDITIONAL STATEMENTS WILL BE ISSUED AS REQUIRED BY CONDITIONS.
CKD
Special weather statement, Aug 3, 7:43 PM EDT, 28 minutes before
NJZ002>004-040040

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ATLANTIC CITY NJ
735 PM EDT SAT AUG 3 1991

...SEVERE THUNDERSTORMS CROSSING SOUTHEAST PENNSYLVANIA...

AT 733 PM...OUR WEATHER SEARCH RADAR INDICATED THUNDERSTORMS WITH HAIL
...INTENSE DOWNPOURS...GUSTY WINDS AND FREQUENT DANGEROUS LIGHTNING MOVING
FROM SOUTHEAST PENNSYLVANIA CHESTER...DELAWAREW AND PHILADELPHIA COUNTIES
INTO THE WESTERN POTIONS OF SOUTHERN NEW JERSEY CAMDEN...GLOUCESTER AND
SALEM COUNTIES. ALSO FROM EXTREME NORTHERN DELAWARE ACROSS THE UPPER
DELAWARE BAY. 3/4 INCH HAIL HAS BEEN REPORTED WITH THESE STORMS.

OTHER WIDELY SCATTERD STORMS WERE DETECTED IN NORTHERN NEW JERSEY SOUTHERN
SOMERSET COUNTY...ALONG6 THE UPPER EASTERN SHORES OF THE CHESAPEAKE BAY IN
MARYLAND.

SHOWERS WERE ALONG THE NEW JERSEY COAST AND COASTAL WATERS FROM SEASIDE
HEIGHTS TO ASBURY PARK.
Special weather statement, Aug 3, 7:44 PM EDT, 27 minutes before
NJZ002>004-040040

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ATLANTIC CITY NJ
735 PM EDT SAT AUG 3 1991

...SEVERE THUNDERSTORMS CROSSING SOUTHEAST PENNSYLVANIA...

AT 733 PM...OUR WEATHER SEARCH RADAR INDICATED THUNDERSTORMS WITH HAIL
...INTENSE DOWNPOURS...GUSTY WINDS AND FREQUENT DANGEROUS LIGHTNING MOVING
FROM SOUTHEAST PENNSYLVANIA CHESTER...DELAWAREW AND PHILADELPHIA COUNTIES
INTO THE WESTERN POTIONS OF SOUTHERN NEW JERSEY CAMDEN...GLOUCESTER AND
SALEM COUNTIES. ALSO FROM EXTREME NORTHERN DELAWARE ACROSS THE UPPER
DELAWARE BAY. 3/4 INCH HAIL HAS BEEN REPORTED WITH THESE STORMS.

OTHER WIDELY SCATTERD STORMS WERE DETECTED IN NORTHERN NEW JERSEY SOUTHERN
SOMERSET COUNTY...ALONG THE UPPER EASTERN SHORES OF THE CHESAPEAKE BAY IN
MARYLAND.

SHOWERS WERE ALONG THE NEW JERSEY COAST AND COASTAL WATERS FROM SEASIDE
HEIGHTS TO ASBURY PARK.

IF THREATENING WEATHER APPROACHES BE PREPARED TO SEEK SHELTER.

MOVEMENT WAS EAST AT 20 MILES AN HOUR.

FXD

The office that day

Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 3, 8:14 PM EDTSevere Thunderstorm WarningPHISalem46 min
Aug 3, 8:23 PM EDTSevere Thunderstorm WarningPHICumberland67 min
Aug 3, 8:59 PM EDTSevere Thunderstorm WarningPHIBurlington, Ocean61 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.