Alert archive / New Jersey / Severe Thunderstorm Warnings in 1992

Severe Thunderstorm Warning 41, NWS Philadelphia/Mount Holly

July 31, 1992Camden County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 31, 1992, 9:59 AM EDT for Camden County, New Jersey. It was in force for 61 min.

The area

The counties it named.

The facts

Issued: Jul 31, 1992, 9:59 AM EDT (13:59 UTC)
Expired: Jul 31, 1992, 11:00 AM EDT
In force: 61 min
Issued by: NWS Philadelphia/Mount Holly
Area: Whole counties

County Camden County, NJ

The nearest sounding before it

Atlantic City In, NJ (KACY), launched 12:00Z, 2.0 hours before the alert went out and 56 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 798 J/kg
Mixed-layer CIN: -29 J/kg
Mixed-layer LCL: 721 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 100 m²/s²
0-3 km storm-relative helicity: 137 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 2.5

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KPHL 311401
SVRPHL
NJC007-311500-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM AND FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE PHILADELPHIA PA
959 AM EDT FRI JUL 31 1992
 
THE NATIONAL WEATHER SERVICE IN PHILADELPHIA HAS ISSUED A
SEVERE THUNDERSTORM AND FLASH FLOOD WARNING
EFFECTIVE UNTIL 1100 AM EDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN SOUTH NEW JERSEY
 
   ...EASTERN CAMDEN COUNTY
 
A SEVERE THUNDERSTORM WAS INDICATED BY RADAR NEAR CENTRAL CAMDEN
COUNTY MOVING TOWARD THE NORTHEAST AT AROUND 30 MPH. EXCESSIVE
RAINFALL OF 2 OR MORE INCHES PER HOUR HAS ALSO OCCURRED
IN THIS COUNTY AND FLASH FLOODING OF SMALL STREAMS IS POSSIBLE.
 
 
THIS IS A DANGEROUS STORM.  IF YOU ARE IN THE WARNED AREA...PREPARE
FOR STRONG DAMAGING WINDS...LARGE HAIL...VERY 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.
 
HEAVY RAINS WITH THIS THUNDERSTORM MAY CAUSE FLOODING OF SMALL
STREAMS AND UNDERPASSES VERY QUICKLY.  DO NOT DRIVE YOUR CAR INTO
AREAS WHERE THE WATER COVERS THE ROADWAY.  THE WATER MAY BE DEEPER
THAN YOU THINK.  IF CAUGHT IN RISING WATERS...ABANDON YOUR CAR
QUICKLY.  MOVE TO HIGHER GROUND.
 
SEVERE THUNDERSTORMS PRODUCE WINDS IN EXCESS OF 55 MILES PER HOUR...
LARGE HAIL...AND DEADLY LIGHTNING.  IF THREATENING WEATHER SUDDENLY
APPROACHES YOU...BOATERS SHOULD BE PREPARED TO MOVE TO SAFE HARBOR.
IF CAUGHT OUT ON THE OPEN WATER...STAY BELOW DECK...IF POSSIBLE...AND
AWAY FROM UNGROUNDED METAL OBJECTS.

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 31, 9:42 AM EDT	Severe Thunderstorm Warning	PHI	Burlington	63 min
Jul 31, 9:59 AM EDT	Flash Flood Warning	PHI	Camden	61 min
Jul 31, 10:05 AM EDT	Flash Flood Warning	PHI	Burlington	55 min
Jul 31, 10:05 AM EDT	Severe Thunderstorm Warning	PHI	Burlington	55 min
Jul 31, 7:09 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Cape May, Cumberland	66 min

Nearby

Severe Thunderstorm Warnings in New Jersey, 1992 Every severe thunderstorm warning in 1992

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.