Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 1994

Severe Thunderstorm Warning 32, NWS Philadelphia/Mount Holly

June 6, 1994Bucks County, Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 6, 1994, 11:34 PM EDT for Bucks County, Pennsylvania. It was in force for 41 min. 1 report 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 6, 1994, 11:34 PM EDT (03:34 UTC)
Expired: Jun 7, 1994, 12:15 AM EDT
In force: 41 min
Issued by: NWS Philadelphia/Mount Holly
Area: Whole counties

County Bucks County, PA

What was reported inside it

Time	Report	Where	Remark
Jun 6, 11:47 PM EDT	Tornado F1	Hilltown, PA	A tornado struck a farm in Hilltown Township about half a mile southeast of the Blooming Glen Post Office. It completely demolished a 40 by 50 foot concrete block building. The building was located between a stone farmhouse and barn, neither of which sustain

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, 3.6 hours before the alert went out and 111 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: 760 J/kg
Mixed-layer CIN: -65 J/kg
Mixed-layer LCL: 754 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 53 m²/s²
0-3 km storm-relative helicity: 15 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -1.9

Open this sounding in Storm Lab

The text

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

000 
WUUS1 KPHL 070336 RRA
SVRPHL
PAC017-070415-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PHILADELPHIA/MOUNT HOLLY NJ
1134 PM EDT MON JUN 6 1994
 
THE NATIONAL WEATHER SERVICE IN PHILADELPHIA/MOUNT HOLLY HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1215 AM EDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN SOUTHEAST PENNSYLVANIA
   ...BUCKS COUNTY
 
DOPPLER RADAR WAS FOLLOWING A SEVERE THUNDERSTORM WAS ABOUT TO ENTER
BUCKS COUNTY NEAR HILLTOWN.  MOVEMENT WAS EAST AT 25 MILES AN HOUR AND
SHOULD PASS CLOSE TO DOYLESTOWN BEFORE MIDNIGHT.  REPORTS HAVE BEEN
RECEIVED OF MARBLE SIZED HAIL AND FREQUENT CLOUD TO GROUND LIGHTNING.
THIS SEVERE THUNDERSTORM STILL SHOWS THE POTENTIAL TO ALSO PRODUCE
DAMAGING WIND GUSTS AND TORNADOES SOMETIMES FORM FROM THESE STORMS WITH
LITTLE OR NO ADVANCE WARNING.
 
THE SAFEST PLACE TO BE DURING A SEVERE THUNDERSTORM IS INDOORS AWAY
FROM WINDOWS.
 
 
&

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 6, 11:10 PM EDT	Tornado Warning	PHI	Montgomery	35 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 1994 Every 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.