Alert archive / Pennsylvania / Tornado Warnings in 1994

Tornado Warning 1, NWS Philadelphia/Mount Holly

June 6, 1994Montgomery County, Pennsylvania

NWS Philadelphia/Mount Holly issued this tornado warning at Jun 6, 1994, 11:10 PM EDT for Montgomery County, Pennsylvania. It was in force for 35 min.

The area

The counties it named.

The facts

Issued
Jun 6, 1994, 11:10 PM EDT (03:10 UTC)
Expired
Jun 6, 1994, 11:45 PM EDT
In force
35 min
Issued by
NWS Philadelphia/Mount Holly
Area
Whole counties

County Montgomery County, PA

The nearest sounding before it

Atlantic City In, NJ (KACY), launched 00:00Z, 3.2 hours before the alert went out and 112 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 00:00Z on 1994-06-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 760 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 00:00Z on 1994-06-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 53 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
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 
TTAA00 KPHL 070313
TORPHL
PAC091-070345-
 
BULLETIN - EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE PHILADELPHIA/MOUNT HOLLY NJ
1110 PM EDT MON JUN 6 1994
 
THE NATIONAL WEATHER SERVICE IN PHILADELPHIA/MOUNT HOLLY HAS ISSUED A
TORNADO WARNING EFFECTIVE UNTIL 1145 PM EDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN SOUTHEAST PENNSYLVANIA
 
   ...EASTERN MONTGOMERY COUNTY
 
NATIONAL WEATHER SERRVICE DOPPLER RADAR INDICATED A TORNADO WAS
LOCATED IN NOR0THERN MONTGOMERY COUNTY JUST TO THE EAST OF POTTSTOWN.
MOVEMENT WAS EAST AT 25 MILES AN HOUR.  EVEN IF THE TORNADO LIFTS
THIS STORM HAS THE POTENTIAL TO STILL PRODUCE DAMAGING WIND GUSTS...
HAIL AND HEAVY DOWNPOURS.

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 6, 11:34 PM EDTSevere Thunderstorm WarningPHIBucks41 min

Nearby

Tornado Warnings in Pennsylvania, 1994Every tornado warning in 1994Tornadoes 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.