Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 63, NWS Cleveland, OH

July 9, 1990Venango County, Pennsylvania

NWS Cleveland, OH issued this severe thunderstorm warning at Jul 9, 1990, 1:50 PM EDT for Venango County, Pennsylvania. It was in force for 70 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
Jul 9, 1990, 1:50 PM EDT (17:50 UTC)
Expired
Jul 9, 1990, 3:00 PM EDT
In force
70 min
Issued by
NWS Cleveland, OH
Area
Whole counties

County Venango County, PA

The radar

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

What was reported inside it

TimeReportWhereRemark
Jul 9, 2:10 PM EDTThunderstorm Wind 0Venango, PA

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.

The nearest sounding before it

Pittsburgh, PA (KPIT), launched 12:00Z, 5.8 hours before the alert went out and 114 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 1990-07-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1312 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Pittsburgh, PA at 12:00Z on 1990-07-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 143 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
1312 J/kg
Mixed-layer CIN
-49 J/kg
Mixed-layer LCL
1037 m above ground
0-6 km bulk shear
29 kt
0-1 km storm-relative helicity
143 m²/s²
0-3 km storm-relative helicity
130 m²/s²
Significant tornado parameter
0.6
Supercell composite
5.3

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KERI 091750
SVRERI
PAC121-091900-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM AND FLASH FLOOD WARNING 
NATIONAL WEATHER SERVICE ERIE PA
150 PM EDT MON JUL 9 1990

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
AND FLASH FLOOD WARNING EFFECTIVE UNTIL 300 PM EDT FOR PEOPLE 
IN THE FOLLOWING COUNTY

   IN THE NORTHWEST PART OF PENNSYLVANIA
      VENANGO

AT 145 PM EDT RADAR INDICATED A SEVERE THUNDERSTORM OVER NORTHEAST
MERCER COUNTY. THIS STORM WAS MOVING TO THE EAST SOUTHEAST AT 30
MILES AN HOUR AND WILL MOVE INTO VENANGO CO BY 200 PM EDT. THIS
PATH OF MOVEMENT WILL TAKE THE STORM TOWARD FRANKLIN IN VENANGO
CO.

WHEN THUNDERSTORMS ARE OCCURRING...PEOPLE 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..K.VERY HEAVY RAIN AND DANGEROUS
LIGHTNING ARE ALL POSSIBLE IN SEVERE THUNDERSTORMS.

 A FLASH FLOOD WARNING MEANS THAT FLOODING IS OCCURRING NOW OR IS
 IMMINENT.  TAKE COVER ON HIGHER GROUND IF FLOOD WATERS APPROACH
 YOUR AREA.

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

Local storm report, Jul 9, 11:43 AM EDT, 2 hours 7 minutes before
STORM REPORT CORRECTED
NATIONAL WEATHER SERVICE ERIE, PA
1133 AM EDT MON JUL 09 1990

 STORM REPORT FOR JULY 5, 1990  CORRECTED FOR TIMES AND UPDATED

TIME  EDT   EVENT

0025  EDT   DIME SIZE HAIL AND TREES AND LIMBS DOWN NEAR PENNISULA
            RD IN CITY OF ERIE, ERIE CO PA.  BY SKYWARN.

0043  EDT   POWERS LINES DOWN E. 28TH ST AND BURTON IN CITY OF
            ERIE IN ERIE CO PA.  SKYWARN.

0110  EDT   POWER LINES AND TREES DOWN NEAR BUFFALO RD TO PEACH
            ST IN CITY OF ERIE, ERIE CO PA. SKYWARN

0112  EDT   NUMEROUS REPORTS OF DIME SIZE TO 3/4 INCH HAIL NEAR
            RT I90 AND RT 430 NEAR ERIE IN ERIE CO. PA. SKYWARN.

END

[
Special weather statement, Jul 9, 12:28 PM EDT, 1 hour 22 minutes before
OHZ004-PAZ003-071800-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE YOUNGSTOWN OH
1228 PM EDT MON JUL 9 1990

FLASH FLOOD WATCH FOR MERCER AND LAWRENCE COUNTY UNTIL 300 PM EDT.

AT 1215 PM EDT NATIONAL WEATHER RADAR INDICATED A LINE OF THUNDERSTORMS
RUNNING WEST TO EAST FROM NORTH OF WARREN OHIO TO NORTH OF DUBOIS
PENNSYLVANIA.  THE STONGEST CELLS ARE OVER NORTHERN MERCER COUNTY
PENNSYLVANIA.  MOVEMENT OF THESE STORMS WAS EAST SOUTHEAST AT 30O MPH.

THESE STORMS CAN PROUDUCE LOCALLY HEAVY RAIN AND DANGEROUS LIGHTNING.
RAINFALL AMOUNTS OF 1.5 INCHES IN A COUPLE OF HOURS HAVE BEEN REPORTED
WITH THESE STORMS.

SITES
Special weather statement, Jul 9, 12:29 PM EDT, 1 hour 21 minutes before
OHZ006-011-091930-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MANSFIELD OH
1230 PM EDT MON JUL 9 1990

AT 1225 PM NATIONAL WEATHER SERVICE RADAR SHOWED THUNDERSTORMS...SOME
WITH VERY HEAVY RAIN AND FREQUENT CLOUD TO GROUND LIGHTNING...
EXTENDING ACROSS NORTHERN ASHLAND AND NORTHERN RICHLAND COUNTY TO THE
CENTRAL PART OF CRAWFORD COUNTY. THEY THUNDERSTORMS WERE MOVING
SLOWLY TO THE SOUTHEAST AT ABOUT 25 MPH.

THESE THURNDERSTORMS WILL LIKELY POUND THE CENTRAL HIGHLANDS UNTIL
2PM EDT.

STRONG GUSTY WINDS AND PONDING OF WATER IS LIKELY. BE PREPARD TO
MOVE TO A PLACE OF SAFETY IF THREATENING WEATHER APPROACHES.

BANYAS

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 9, 12:48 PM EDTFlash Flood WarningCLEVenango57 min
Jul 9, 12:48 PM EDTSevere Thunderstorm WarningCLEVenango57 min
Jul 9, 1:40 PM EDTSevere Thunderstorm WarningCLELawrence50 min
Jul 9, 1:50 PM EDTFlash Flood WarningCLEVenango70 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 1990Every severe thunderstorm warning in 1990

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.