Alert archive / New Jersey / Severe Thunderstorm Warnings in 1994

Severe Thunderstorm Warning 98, NWS Philadelphia/Mount Holly

August 14, 1994Mercer County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 14, 1994, 3:20 PM EDT for Mercer County, New Jersey. It was in force for 25 min.

The area

The counties it named.

The facts

Issued
Aug 14, 1994, 3:20 PM EDT (19:20 UTC)
Expired
Aug 14, 1994, 3:45 PM EDT
In force
25 min
Issued by
NWS Philadelphia/Mount Holly
Area
Whole counties

County Mercer County, NJ

The nearest sounding before it

Atlantic City In, NJ (KACY), launched 12:00Z, 7.3 hours before the alert went out and 94 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 12:00Z on 1994-08-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 243 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 12:00Z on 1994-08-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 187 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
243 J/kg
Mixed-layer CIN
-103 J/kg
Mixed-layer LCL
1037 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
187 m²/s²
0-3 km storm-relative helicity
194 m²/s²
Significant tornado parameter
0.1
Supercell composite
0.9

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KPHL 141918 RRA
SVRPHL
NJC021-141945-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PHILADELPHIA/MOUNT HOLLY NJ
320 PM EDT SUN AUG 14 1994
 
THE NATIONAL WEATHER SERVICE IN PHILADELPHIA/MOUNT HOLLY HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  345 PM EDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN WEST CENTRAL NEW JERSEY
 
   ...MERCER COUNTY
 
AT 315 PM...NATIONAL WEATHER SERVICE RADAR INDICATED THAT A SEVERE
THUNDERSTORM WAS MOVING FROM CENTRAL AND SOUTHERN BUCKS COUNTY IN
PENNSYLVANIA INTO MERCER COUNTY. THIS STORM IS MOVING TO THE EAST
NORTHEAST AROUND 45 MPH. THIS SEVERE THUNDERSTORM SHOULD MOVE ACROSS
MUCH OF MERCER COUNTY DURING THE NEXT 30 MINUTES OR SO.
 
 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.
 
A TORNADO WATCH CONTINUES FOR THE PHILADELPHIA METROPOLITAN AREA AND
FOR NEW JERSEY UNTIL 730 PM EDT. REMEMBER SEVERE THUNDERSTORMS CAN AND
OCCASIONALLY DO PRODUCE TORNADOES WITH LITTLE OR NO ADVANCED WARNING.
 
IOVINO
 
$$

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 14, 3:31 PM EDTSevere Thunderstorm WarningPHIMiddlesex29 min
Aug 14, 3:40 PM EDTSevere Thunderstorm WarningPHIBurlington, Mercer50 min

Nearby

Severe Thunderstorm Warnings in New Jersey, 1994Every severe thunderstorm warning in 1994

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.