Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 84, NWS Cleveland, OH

August 28, 1990Crawford County, Venango County, Pennsylvania

NWS Cleveland, OH issued this severe thunderstorm warning at Aug 28, 1990, 9:31 PM EDT for Crawford County, Venango County, Pennsylvania. It was in force for 59 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
Aug 28, 1990, 9:31 PM EDT (01:31 UTC)
Expired
Aug 28, 1990, 10:30 PM EDT
In force
59 min
Issued by
NWS Cleveland, OH
Area
Whole counties

Counties Crawford County, PA, 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
Aug 28, 9:55 PM EDTThunderstorm Wind 0Crawford, 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 00:00Z, 1.5 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 00:00Z on 1990-08-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2368 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 1990-08-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 121 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
2368 J/kg
Mixed-layer CIN
-56 J/kg
Mixed-layer LCL
1231 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
121 m²/s²
0-3 km storm-relative helicity
168 m²/s²
Significant tornado parameter
1.2
Supercell composite
10.7

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KERI 290131
SVRERI
PAC039-121-290230-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING 
NATIONAL WEATHER SERVICE ERIE PA
931 PM EDT TUE AUG 28 1990

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
WARNING EFFECTIVE UNTIL 1030 PM EDT FOR PEOPLE IN THE FOLLOWING 
COUNTIES

   IN THE NORTHWEST PART OF PENNSYLVANIA
      CRAWFORD...VENANGO

AT 930 PM EDT RADAR INDICATED SEVERE THUNDERSTORMS IN CRAWFORD COUN
TY PA NORTHWEST OF CAMBRIDGE SPRINGS.  ANOTHER SEVERE THUNDERSORM
WAS IN THE EXTREME NORTHWEST CORNER OF VENANGO COUNTY PA. NORTHWEST
OF OIL CITY.

THESE STORMS WERE MOVING EAST SOUTHEAST AT 35 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.

IF THREATENING WEATHER APPROACHES YOU SHOULD GO TO A SAFE PLACE
IMMEDIATELY AND ASK THE NEAREST LAW ENFORCEMENT AGENY TO RELAY YOUR
SEVERE WEATHER REPORTS TO THE LOCAL NATIONAL WEATHER SERVICE OFFICE.

A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA.  REMEMBER...
SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES
WITH LITTLE OR NO ADVANCE WARNING.  REMAIN CALM BUT BE ALERT TO
RAPIDLY CHA9NGING WEATHER CONDITIONS.

 RR

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, Aug 28, 5:02 PM EDT, 4 hours 29 minutes before
OHZ001-002-011-282200-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TOLEDO OH
501 PM EDT TUE AUG 28 1990

THUNDERSTORMS WERE MOVING INTO NORTHWEST OHIO THIS EVENING.

AT 455 PM WEATHER RADAR INDICATED THUNDERSTORMS WITH POSSIBLE HAIL
LOCATED IN WILLIAMS COUNTY OF NORTHWEST OHIO.  THESE STORMS WERE
MOVING EAST AT 35 MPH... AND WILL MOVE INTO FULTON AND HENRY COUNTIES
BY 530 PM.

THIS IS A POTENTIALLY DANGEROUS SITUATION.  IF YOU ARE IN NORTHWEST
OHIO YOU SHOULD PREPARE FOR SEVERE THUNDERSTORMS WITH HAIL AND DAMAGING
WINDS.  STAY TUNED TO NOAA WEATHER RADIO FOR FURTHER UPDATES AND
POSSIBLE WARNINGS.

MURPHY
Special weather statement, Aug 28, 9:12 PM EDT, 19 minutes before
OHZALL-290230-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CLEVELAND OH
915 PM EDT TUE AUG 28 1990

A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR ALL OF OHIO EXCEPT THE
NORTHWEST AND THE EXTREME SOUTH UNTIL 2 AM.

THE WATCH THAT WAS IN EFFECT FOR THE NORTHWEST COUNTIES OF OHIO EARLIER
HAS BEEN CANCELED.

MAJOR CITIES COVERED BY THE WATCH INCLUDE AKRON... CANTON...
CINCINNATI... CLEVELAND... COLUMBUS... DAYTON... AND YOUNGSTOWN. MAJOR
CITIES NO LONGER COVERED BY ANY WATCH INCLUDE FINDLAY... LIMA... AND
TOLEDO.

THUNDERSTORMS CONTINUED TO MOVE ACROSS EXTREME NORTHEAST AND MUCH OF
CENTRAL OHIO AT 905 PM. THE STORMS WERE MOVING SOUTHEAST AT 35 MPH...
AND HAVE THE POTENTIAL TO PRODUCE /DAMAGING WINDS... LARGE HAIL... AND
HEAVY DOWNPOURS. OHIOANS IN THE WATCH AREA SHOULD BE PREPARED FOR SUCH
CONDITIONS UNTIL AT LEAST THE EARLY MORNING HOURS.

KWIATKOWSKI
Special weather statement, Aug 28, 9:17 PM EDT, 14 minutes before
OHZ006-011-290300-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MANSFIELD OH
915 PM EDT TUE AUG 28 1990

...A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 2 AM EDT WEDNESDAY
MORNING...

AT 915 PM EDT WEATHER RADAR SHOWED SCATTERED THUNDERSTORMS OVER
NORTH CENTRAL OHIO. THE HEAVIEST THUNDERSTORM WAS OVER WESTERN MORROW
COUNTY MOVING SOUTHEAST AT 25 MPH.

THESE THUNDERSTORMS ARE CAPABLE OF PRODUCING STRONG GUSTY SURFACE ?
WINDS AND LOCALLY HEAVY DOWNPOURS.

IF SEVERE WEATHER THREATENS BE PREPARED TO MOVE TO A PLACE OF SAFETY.

BANYAS

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 28, 8:20 PM EDTSevere Thunderstorm WarningCLECrawford, Erie, Venango, Warren70 min
Aug 28, 8:20 PM EDTSevere Thunderstorm WarningCLECameron, Elk, Forest, McKean, Potter70 min
Aug 28, 8:26 PM EDTTornado WarningCLEErie64 min
Aug 28, 9:33 PM EDTSevere Thunderstorm WarningCLEMercer57 min
Aug 28, 10:26 PM EDTSevere Thunderstorm WarningCLEMercer34 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.