Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 1994

Severe Thunderstorm Warning 113, NWS Pittsburgh, PA

August 25, 1994Forest County, Venango County, Pennsylvania

NWS Pittsburgh, PA issued this severe thunderstorm warning at Aug 25, 1994, 4:43 PM EDT for Forest County, Venango County, Pennsylvania. It was in force for 47 min.

The area

The counties it named.

The facts

Issued
Aug 25, 1994, 4:43 PM EDT (20:43 UTC)
Expired
Aug 25, 1994, 5:30 PM EDT
In force
47 min
Issued by
NWS Pittsburgh, PA
Area
Whole counties

Counties Forest County, PA, Venango County, PA

The nearest sounding before it

Pittsburgh, PA (KPIT), launched 12:00Z, 8.7 hours before the alert went out and 127 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 12:00Z on 1994-08-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 209 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 12:00Z on 1994-08-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 81 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
209 J/kg
Mixed-layer CIN
-45 J/kg
Mixed-layer LCL
1087 m above ground
0-6 km bulk shear
22 kt
0-1 km storm-relative helicity
81 m²/s²
0-3 km storm-relative helicity
81 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KPIT 252045 RRA
SVRPIT
PAC053-121-252130-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PITTSBURGH PA
443 PM EDT THU AUG 25 1994
 
THE NATIONAL WEATHER SERVICE IN PITTSBURGH HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  530 PM EDT
FOR THE FOLLOWING LOCATIONS...
 
IN NORTHWEST PENNSYLVANIA
 
   ...FOREST COUNTY...VENANGO COUNTY
 
AT 445 PM PITTSBURGH DOPPLER WEATHER RADAR INDICATED A SEVERE
THUNDERSTORM IN NORTHEASTERN VENANGO COUNTY. THE STORM IS MOVING
SOUTHEAST INTO FOREST COUNTY AT 20 MPH.
 
IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER FROM THE WEATHER IN A
STRONG BUILDING.  DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN...
AND DEADLY LIGHTNING ARE ALL POSSIBLE IN SEVERE THUNDERSTORMS.
STAY INSIDE AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 25, 3:28 PM EDTSevere Thunderstorm WarningPBZVenango62 min
Aug 25, 3:54 PM EDTSevere Thunderstorm WarningPBZButler66 min
Aug 25, 5:40 PM EDTSevere Thunderstorm WarningPBZWashington65 min
Aug 25, 6:04 PM EDTSevere Thunderstorm WarningPBZClarion56 min
Aug 25, 6:42 PM EDTSevere Thunderstorm WarningPBZAllegheny, Westmoreland48 min

Nearby

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