Alert archive / Pennsylvania / Tornado Warnings in 1994

Tornado Warning 5, NWS Philadelphia/Mount Holly

August 14, 1994Montgomery County, Pennsylvania

NWS Philadelphia/Mount Holly issued this tornado warning at Aug 14, 1994, 3:15 PM EDT for Montgomery County, Pennsylvania. It was in force for 30 min.

The area

The counties it named.

The facts

Issued
Aug 14, 1994, 3:15 PM EDT (19:15 UTC)
Expired
Aug 14, 1994, 3:45 PM EDT
In force
30 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 12:00Z, 7.3 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 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 141913
TORPHL
PAC091-141945-
 
BULLETIN - EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE PHILADELPHIA/MOUNT HOLLY NJ
315 PM EDT SUN AUG 14 1994
 
THE NATIONAL WEATHER SERVICE IN PHILADELPHIA/MOUNT HOLLY HAS ISSUED A
TORNADO WARNING EFFECTIVE UNTIL  345 PM EDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN SOUTHEAST PENNSYLVANIA
 
   ...SOUTHERN MONTGOMERY COUNTY
 
AT 315 PM...THE NATIONAL WEATHER SERVICE WAS INFORMED THAT A TORNADO HAD
TOUCHED DOWN IN UPPER MARION TOWNSHIP. THIS STORM IS MOVING TO THE EAST
NORTHEAST AROUND 45 MPH. THIS MOVEMENT SHOULD TAKE THE STORM THROUGH
AREAS ALONG THE PENNSYLVANIA TURNPIKE IN SOUTHERN MONTGOMERY COUNTY
DURING THE NEXT 30 MINUTES OR SO.
 
THIS IS A DANGEROUS STORM.  IF YOU ARE IN THE PATH OF THIS
TORNADO...MOVE TO A BELOW GROUND SHELTER IF AVAILABLE.  OTHERWISE
GO TO A SMALL CENTRAL INTERIOR ROOM ON THE LOWEST FLOOR POSSIBLE.
ABANDON CARS AND MOBILE HOMES FOR A REINFORCED BUILDING.
 
IOVINO
 
$$

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 14, 2:25 PM EDTSevere Thunderstorm WarningPHIChester, Montgomery50 min
Aug 14, 2:55 PM EDTSevere Thunderstorm WarningPHIBucks50 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.