Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 1989

Severe Thunderstorm Warning 45, NWS Cleveland, OH

July 7, 1989Elk County, Forest County, Pennsylvania

NWS Cleveland, OH issued this severe thunderstorm warning at Jul 7, 1989, 4:23 PM EDT for Elk County, Forest County, Pennsylvania. It was in force for 97 min.

The area

The counties it named.

The facts

Issued
Jul 7, 1989, 4:23 PM EDT (20:23 UTC)
Expired
Jul 7, 1989, 6:00 PM EDT
In force
97 min
Issued by
NWS Cleveland, OH
Area
Whole counties

Counties Elk County, PA, Forest County, PA

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

Pittsburgh, PA (KPIT), launched 12:00Z, 8.4 hours before the alert went out and 153 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 1989-07-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 18 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 1989-07-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 48 square meters per square second.1939Sfc1 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
18 J/kg
Mixed-layer CIN
-132 J/kg
Mixed-layer LCL
1092 m above ground
0-6 km bulk shear
15 kt
0-1 km storm-relative helicity
48 m²/s²
0-3 km storm-relative helicity
14 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 KERI 072023
SVRERI
PAC053-047-121-072200-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING 
NATIONAL WEATHER SERVICE ERIE PA
423 PM EDT FRI JUL 7 1989

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
WARNING EFFECTIVE UNTIL 600 PM EDT FOR PEOPLE IN THE FOLLOWING 
COUNTIES

   IN THE NORTHWEST PART OF PENNSYLVANIA
      FOREST...ELK...VENANGO

AT 4 PM EDT ERIE WEATHER RADAR INDICATED A LINE OF SEVERE
THUNDERSTORMS FROM NEAR GREENVILLE PENNSYLVANIA EXTENDING EAST TO
NEAR BRADFORD.  THE LINE WAS MOVING TO THE SOUTHEAST AT 20 MILES
AN HOUR

WHEN THUNDERSTORMS ARE OCCURRING...PEAOPLE SHOULD MOVE INSIDE A
STRONG BUILDING.  DO NOT STAND NEAR WINDOWS.  DO NOT USE TELEPHONES
OR ELECTRICAL APPLIANCES.  MOTORISTS SHOULD AVOID LOW WATER CROSSINGS.

IF YOU ARE CAUGHT OUTSIDE...FIND SHELTER IN A NEARBY REINFORCED
BUILDING.  DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN AND DANGEROUS
LIGHTNING ARE ALL POSSIBLE IN SEVERE THUNDERSTORMS.

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Special weather statement, Jul 7, 4:22 PM EDT, 1 minute before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CLEVELAND OH
422 PM EDT FRI JUL 7 1989

AT 415 PM... CLEVELAND WEATHER RADAR INDICATED A THUNDERSTORM
POSSIBLY PRODUCING HAIL IN NORTHEAST HURON COUNTY... EAST OF NORWALK
OR ABOUT 30 MILES WEST SOUTHWEST OF CLEVELAND HOPKINS AIRPORT.

THIS STORM WAS MOVING SOUTHEAST AT 25 TO 30 MPH AND WILL MOVE
THROUGH SOUTHWEST LORAIN COUNTY INTO EITHER NORTHEAST ASHLAND COUNTY
OR SOUTHWEST MEDINA COUNTY BY 5 PM.

OTHER SHOWERS AND THUNDERSTORMS WERE SCATTERED THROUGH NORTHWEST OHIO
FROM NEAR PAULDING AND FINDLAY TO UPPER SANDUSKY AND JUST WEST OF
MANSFIELD.

THUNDERSTORMS SHOULD AFFECT THE MANSFIELD AREA BETWEEN 430 AND 515 PM.

DRAG
Special weather statement, Jul 7, 4:22 PM EDT, 1 minute before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TOLEDO OH
421 PM EDT FRI JUL 7 1989

SHOWERS AND THUNDERSTORMS WERE DEVELOPING OVER NORTHWEST OHIO.

AT 417 PM EDT WEATHER SERVICE RADAR INDICATED NEWLY DEVELOPED SCATTERED
SHOWERS AN THUNDERSTORMS OVER PUTNAM, HANCOCK, SENECA AND WYANDOT
COUNTIES OF NORTHWEST OHIO.  THE THUNDERSTORMS CONTINUED TO INCREASE IN
STRENGTH AND WERE MOVING SLOWLY SOUTHEAST.  THESE SHOWERS AND
THUNDERSTORMS ARE EXPECTED TO EXIT NORTHWEST OHIO BY 530 PM.

IF THREATENING WEATHER APPROACHES YOUR AREA...SEEK SHELTER.

ELH

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 7, 4:23 PM EDTSevere Thunderstorm WarningCLEVenango97 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 1989Every severe thunderstorm warning in 1989

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.