Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 1995

Severe Thunderstorm Warning 94, NWS Philadelphia/Mount Holly

October 5, 1995Delaware County, Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Oct 5, 1995, 11:43 PM EDT for Delaware County, Pennsylvania. It was in force for 62 min.

The area

The counties it named.

The facts

Issued
Oct 5, 1995, 11:43 PM EDT (03:43 UTC)
Expired
Oct 6, 1995, 12:45 AM EDT
In force
62 min
Issued by
NWS Philadelphia/Mount Holly
Area
Whole counties

County Delaware County, PA

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 00:00Z, 3.7 hours before the alert went out and 203 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, Washington/Dulle, VA at 00:00Z on 1995-10-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 937 joules per kilogram.LCLEL10008507005003002001001 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, Washington/Dulle, VA at 00:00Z on 1995-10-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 293 square meters per square second.19395878Sfc1 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
937 J/kg
Mixed-layer CIN
0 J/kg
Mixed-layer LCL
608 m above ground
0-6 km bulk shear
42 kt
0-1 km storm-relative helicity
293 m²/s²
0-3 km storm-relative helicity
415 m²/s²
Significant tornado parameter
1.6
Supercell composite
8.6

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KPHL 060345 RRA
SVRPHL
NJC033-PAC045-060445-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PHILADELPHIA/MOUNT HOLLY NJ
1143 PM EDT THU OCT 5 1995
 
THE NATIONAL WEATHER SERVICE IN PHILADELPHIA/MOUNT HOLLY HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1245 AM EDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN  NEW JERSEY
 
   ...SALEM COUNTY
 
IN  PENNSYLVANIA
 
   ...DELAWARE COUNTY
 
AT 1140 PM EDT...WEATHER SERVICE RADAR INDICATED A LINE OF SEVERE
THUNDERSTORMS FROM CHESTER COUNTY IN SOUTHEAST PENNSYLVANIA SOUTH TO
NEW CASTLE COUNTY IN DELAWARE. THIS LINE IS MOVING NORTHEAST AT AROUND
50 MPH AND WILL LIKELY PRODUCE WIND DAMAGE.
 
THESE ARE DANGEROUS STORMS.  PREPARE FOR STRONG DAMAGING WINDS...
LARGE HAIL...HEAVY RAINS AND DEADLY LIGHTNING.  SHOULD A STORM
APPROACH MOVE INSIDE QUICKLY. DO NOT STAND NEAR WINDOWS.  MOBILE
HOMES ARE MOST VULNERABLE TO HIGH WINDS AND SHOULD BE AVOIDED.
 
A vTORNADO WATCH CONTINUES FOR EASTERN PENNSYLVANIA...EASTERN
MARYLAND...DELAWARE AND NEW JERSEY UNTIL 400 AM EDT.  REMEMBER
SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES
WITH LITTLE OR NO ADVANCED WARNING.
 
AMC

The office that day

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

IssuedProductOfficeCountiesLasted
Oct 5, 11:15 PM EDTSevere Thunderstorm WarningPHIChester60 min
Oct 6, 12:06 AM EDTSevere Thunderstorm WarningPHIMontgomery52 min
Oct 6, 12:21 AM EDTSevere Thunderstorm WarningPHIBucks54 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 1995Every severe thunderstorm warning in 1995

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.