Alert archive / New Jersey / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 22, NWS Philadelphia/Mount Holly

June 29, 1990Burlington County, Mercer County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 29, 1990, 10:30 PM EDT for Burlington County, Mercer County, New Jersey. It was in force for 30 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: Jun 29, 1990, 10:30 PM EDT (02:30 UTC)
Expired: Jun 29, 1990, 11:00 PM EDT
In force: 30 min
Issued by: NWS Philadelphia/Mount Holly
Area: Whole counties

Counties Burlington County, NJ, Mercer County, NJ

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

What was reported inside it

Time	Report	Where	Remark
Jun 29, 10:38 PM EDT	Thunderstorm Wind 0	Mercer, NJ
Jun 29, 10:45 PM EDT	Hail 0.75	Burlington, 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, 2.5 hours before the alert went out and 72 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: 396 J/kg
Mixed-layer CIN: -56 J/kg
Mixed-layer LCL: 1591 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 111 m²/s²
0-3 km storm-relative helicity: 190 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.8

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KPHL 300229
SVRPHL
NJC005-021-300300-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PHILADELPHIA PA
1030 PM EDT FRI JUN 29 1990
 
THE NATIONAL WEATHER SERVICE IN PHILADELPHIA HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1100 PM EDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN SOUTH NEW JERSEY
 
   ...NORTHERN BURLINGTON COUNTY
 
IN WEST CENTRAL NEW JERSEY
 
   ...SOUTHERN MERCER COUNTY
 
AT 1025 PM...NATIONAL WEATHER SERVICE RADAR SHOWED A SEVERE
THUNDERSTORM MOVING INTO EXTREME SOUTHERN MERCER COUNTY. THE STORM WAS
MOVING TO THE EAST AT ABOUT 35 MPH.
 
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.
 
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.
 
KRAUS

Nearby

Severe Thunderstorm Warnings in New Jersey, 1990 Every severe thunderstorm warning in 1990

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.