Alert archive / Pennsylvania / Tornado Warnings in 1993

Tornado Warning 9, NWS Cleveland, OH

July 28, 1993Mercer County, Pennsylvania

NWS Cleveland, OH issued this tornado warning at Jul 28, 1993, 8:07 PM EDT for Mercer County, Pennsylvania. It was in force for 53 min.

The area

The counties it named.

The facts

Issued
Jul 28, 1993, 8:07 PM EDT (00:07 UTC)
Expired
Jul 28, 1993, 9:00 PM EDT
In force
53 min
Issued by
NWS Cleveland, OH
Area
Whole counties

County Mercer County, PA

The nearest sounding before it

Pittsburgh, PA (KPIT), launched 00:00Z, 0.1 hours before the alert went out and 100 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 1993-07-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2503 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, Pittsburgh, PA at 00:00Z on 1993-07-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 100 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
2503 J/kg
Mixed-layer CIN
-5 J/kg
Mixed-layer LCL
1289 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
100 m²/s²
0-3 km storm-relative helicity
150 m²/s²
Significant tornado parameter
1.1
Supercell composite
9.5

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KYNG 290007
TORYNG
PAC085-290100-
 
BULLETIN - EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE YOUNGSTOWN OH
807 PM EDT WED JUL 28 1993
 
THE NATIONAL WEATHER SERVICE IN YOUNGSTOWN HAS ISSUED A
TORNADO WARNING EFFECTIVE UNTIL  900 PM EDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN NORTHWEST PENNSYLVANIA
 
   ...MERCER COUNTY
 
AT 805 PM EDT NATIONAL WEATHER SERVICE RADAR INDICATED A POSSIBLE
TORNADO NEAR THE OHIO AND PENNSYLVANIA BORDER JUST TO THE NORTH OF
SHARON PENNSYLVANIA. THE STORM WAS MOVING TO THE EAST AT 30 MPH.
THIS STORM WILL AFFECT MERCER PENNSYLVANIA BY 815 PM.
 
 
THIS IS A DANGEROUS STORM SITUATION.  ACT QUICKLY.  IF YOU ARE
IN THE PATH OF THIS TORNADO MOVE TO A SHELTER BELOW GROUND IF
AVAILABLE.  OTHERWISE...GO TO A SMALL INTERIOR ROOM ON THE LOWEST
FLOOR POSSIBLE.  AVOID WINDOWS.  ABANDON CARS AND MOBILE HOMES
FOR A REINFORCED BUILDING OR GET INTO A DITCH OR CULVERT.
 
MITCHELL

The office that day

Everything else NWS Cleveland, OH issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 28, 8:11 PM EDTFlash Flood WarningCLECrawford, Erie2 hr
Jul 28, 8:11 PM EDTSevere Thunderstorm WarningCLECrawford, Erie2 hr
Jul 28, 9:15 PM EDTFlash Flood WarningCLEForest2 hr
Jul 28, 9:22 PM EDTSevere Thunderstorm WarningCLEMercer11 min
Jul 28, 10:01 PM EDTSevere Thunderstorm WarningCLELawrence44 min

Nearby

Tornado Warnings in Pennsylvania, 1993Every tornado warning in 1993Tornadoes in 1993

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.