Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 1995

Severe Thunderstorm Warning 13, NWS Pittsburgh, PA

April 18, 1995Butler County, Pennsylvania

NWS Pittsburgh, PA issued this severe thunderstorm warning at Apr 18, 1995, 9:42 PM EDT for Butler County, Pennsylvania. It was in force for 63 min.

The area

The counties it named.

The facts

Issued
Apr 18, 1995, 9:42 PM EDT (01:42 UTC)
Expired
Apr 18, 1995, 10:45 PM EDT
In force
63 min
Issued by
NWS Pittsburgh, PA
Area
Whole counties

County Butler County, PA

The nearest sounding before it

Pittsburgh, PA (KPIT), launched 00:00Z, 1.7 hours before the alert went out and 58 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, Pittsburgh, PA at 00:00Z on 1995-04-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 236 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, Pittsburgh, PA at 00:00Z on 1995-04-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 233 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
236 J/kg
Mixed-layer CIN
-134 J/kg
Mixed-layer LCL
1118 m above ground
0-6 km bulk shear
46 kt
0-1 km storm-relative helicity
233 m²/s²
0-3 km storm-relative helicity
288 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.1

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KPIT 190146 COR
SVRPIT
PAC007-019-190245-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING...CORRECTED TO ADD BEAVER COUNTY.
NATIONAL WEATHER SERVICE PITTSBURGH PA
945 PM EDT TUE APR 18 1995

THE NATIONAL WEATHER SERVICE IN PITTSBURGH HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1045 PM EDT
FOR THE FOLLOWING LOCATIONS...

IN WESTERN PENNSYLVANIA

   ...BEAVER AND BUTLER COUNTY.

AT 935 PM RADAR SHOWED A PAIR OF SEVERE THUNDERSTORMS. ONE WAS 10 MILES
NORTHWEST OF EAST LIVERPOOL OHIO AND THE OTHER WAS IN NORTHWEST BUTLER
COUNTY PENNSYLVANIA. BOTH STORMS ARE MOVING NORTHEAST AT 50 MPH.

EARLIER THIS EVENING...LAWRENCE COUNTY PA REPORTED GOLF BALL SIZE HAIL
AND TREES BLOWN DOWN BY WIND.

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55
MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN.
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR
OF YOUR HOME OR BUSINESS.  HEAVY RAINS FLOOD ROADS QUICKLY SO
DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.

&

The office that day

Everything else NWS Pittsburgh, PA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 18, 9:45 PM EDTSevere Thunderstorm WarningPBZBeaver60 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.