Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 1996

Severe Thunderstorm Warning 11, NWS Philadelphia/Mount Holly

April 30, 1996Bucks County, Pennsylvania; Hunterdon County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Apr 30, 1996, 4:31 PM EDT for Bucks County, Pennsylvania; Hunterdon County, New Jersey. It was in force for 29 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: Apr 30, 1996, 4:31 PM EDT (20:31 UTC)
Expired: Apr 30, 1996, 5:00 PM EDT
In force: 29 min
Issued by: NWS Philadelphia/Mount Holly
Area: Whole counties

Counties Hunterdon County, NJ, Bucks County, PA

What was reported inside it

Time	Report	Where	Remark
Apr 30, 4:35 PM EDT	Thunderstorm Wind	Holland, NJ
Apr 30, 4:55 PM EDT	Thunderstorm Wind	Readington, 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.

The nearest sounding before it

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 8.5 hours before the alert went out and 143 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: 66 J/kg
Mixed-layer CIN: -131 J/kg
Mixed-layer LCL: 812 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 269 m²/s²
0-3 km storm-relative helicity: 252 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.0

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KPHL 302033
SVRPHL
NJC019-PAC017-302100-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PHILADELPHIA/MOUNT HOLLY NJ
431 PM EDT TUE APR 30 1996
 
THE NATIONAL WEATHER SERVICE IN PHILADELPHIA/MOUNT HOLLY HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  500 PM EDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN  NEW JERSEY
 
   ...NORTHWEST HUNTERDON COUNTY
 
IN  PENNSYLVANIA
 
   ...NORTHEASTERN BUCKS COUNTY
 
BUCKS COUNTY EMERGENCY MANAGMENT REPORTED WIND DAMAGE WITH A SEVERE
THUNDERSTORM IN QUAKERTOWN. THE STORM IS CURRENTLY IN NOCKAMIXON
TOWNSHIP AND WILL BE ENTERING HUNTERDON COUNTY JUST NORTH OF
FRENCHTOWN BY 445 PM.  IT IS MOVING NORTHEAST AT 30 MPH AND WILL
CUT ACROSS THE REST OF NORTHWEST HUNTERDON COUNTY.
 
REMEMBER SEVERE THUNDERSTORMS SOMETIMES PRODUCE TORNADOES WITH LITTLE
OR NO ADVANCED WARNING.
 
THIS IS A DANGEROUS STORM.  PREPARE FOR STRONG DAMAGING WINDS...
LARGE HAIL...HEAVY RAINS AND DEADLY LIGHTNING.  SHOULD THE STORM
APPROACH MOVE INSIDE QUICKLY. DO NOT STAND NEAR WINDOWS.  MOBILE
HOMES ARE MOST VULNERABLE TO HIGH WINDS AND SHOULD BE AVOIDED.
 
 
 
&

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 30, 4:39 PM EDT	Severe Thunderstorm Warning	PHI	Gloucester	36 min
Apr 30, 5:24 PM EDT	Severe Thunderstorm Warning	PHI	Morris, Somerset	36 min
Apr 30, 5:33 PM EDT	Severe Thunderstorm Warning	PHI	Cumberland	27 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 1996 Severe Thunderstorm Warnings in New Jersey, 1996 Every severe thunderstorm warning in 1996

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.