Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 27, NWS Cleveland, OH

June 9, 1990Forest County, Pennsylvania

NWS Cleveland, OH issued this severe thunderstorm warning at Jun 9, 1990, 6:46 AM EDT for Forest County, Pennsylvania. It was in force for 44 min.

The area

The counties it named.

The facts

Issued
Jun 9, 1990, 6:46 AM EDT (10:46 UTC)
Expired
Jun 9, 1990, 7:30 AM EDT
In force
44 min
Issued by
NWS Cleveland, OH
Area
Whole counties

County 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 00:00Z, 10.8 hours before the alert went out and 142 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 1990-06-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1817 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 1990-06-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 192 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
1817 J/kg
Mixed-layer CIN
-11 J/kg
Mixed-layer LCL
1091 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
192 m²/s²
0-3 km storm-relative helicity
233 m²/s²
Significant tornado parameter
1.0
Supercell composite
10.6

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KERI 091046
SVRERI
PAC053-091130-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING 
NATIONAL WEATHER SERVICE ERIE PA
646 AM EDT SAT JUN 9 1990

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
WARNING EFFECTIVE UNTIL 730 AM EDT FOR PEOPLE IN THE FOLLOWING 
COUNTY

   IN THE NORTHWEST PART OF PENNSYLVANIA
      SOUTHEAST FOREST

AT (630AM THIS SATURDAY MORNING WEATHER SERVICE RADAR IN ERIE INDICATED
TRONG THUNDERSTORM OCCURING OVER SOUTHEASTERN FOREST COUNTY. THIS CELL
 LOCATED JUST SOUTH OF MARIENVILLE AND WAS MOVING RAPIDLY EAST AT 35 TO
MILES AN HOUR.

THIS IS A DANGEROUS STORM.  IF YOU ARE IN ITS PATH...PREPARE FOR
DAMAGING WINDS...LARGE HAIL AND DANGEROUS LIGHTNING.  PEOPLE OUTSIDE
SHOULD MOVE TO SHELTER.  STAY AWAY FROM WINDOWS.

WSO ERI

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, Jun 9, 12:50 AM EDT, 5 hours 56 minutes before
OHZALL-090650-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CLEVELAND OH
1250 AM EDT SAT JUN 9 1990

A TORNADO WATCH CONTINUES IN EFFECT FOR THE SOUTH HALF OF OHIO UNTIL 3
AM.

AT 1240 AM WEATHER SERVICE RADAR SHOWED WIDESPREAD SHOWERS AND
THUNDERSTORMS OVER THE PARTS OF OHIO EAST AND SOUTH OF COLUMBUS. OTHER
PORTIONS OF THE BUCKEYE STATE HAD ISOLATED SHOWERS AND THUNDERSTORMS.
THERE WAS ALSO AN AREA OF SHOWERS AND THUNDERSTORMS ABOUT TO ENTER WEST
CENTRAL OHIO FROM INDIANA.

MOST OF THE PRECIPITATION THAT WAS IN OR NEAR OHIO AT 1240 AM WAS
MOVING EAST AT AROUND 40 MPH. SHOWERS AND THUNDERSTORMS SHOULD CONTINUE
TO AFFECT MAINLY THE SOUTHERN PARTS OF THE STATE FOR MUCH OF THE EARLY
MORNING.

NO SEVERE WEATHER WAS REPORTED IN OHIO FROM 1130 PM TO 1240 AM. HOWEVER
THERE IS STILL A POSSIBILITY OF HAIL... DAMAGING WINDS... OR EVEN
TORNADOES IN THE SOUTHERN PART OF THE STATE. RESIDENTS OF THE TORNADO
WATCH AREA SHOULD REMAIN ALERT FOR THREATENING WEATHER AND HAVE A PLACE
OF SHELTER IN MIND.

ANOTHER WEATHER PROBLEM OHIO MIGHT SEE EARLY THIS MORNING IS VERY HEAVY
RAINS. FOR THIS REASON A FLOOD WATCH IS IN EFFECT STATEWIDE FOR THE
REST OF TONIGHT.

KWIATKOWSKI
Special weather statement, Jun 9, 1:49 AM EDT, 4 hours 57 minutes before
OHZALL-090745-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CLEVELAND OH
150 AM EDT SAT JUN 9 1990

A TORNADO WATCH WILL BE IN EFFECT FOR THE SOUTH HALF OF OHIO UNTIL 3
AM.

AT 140 AM WEATHER SERVICE RADAR SHOWED WIDESPREAD SHOWERS AND
THUNDERSTORMS OVER EAST CENTRAL AND WEST CENTRAL OHIO. MOST OF THE REST
OF OHIO WAS RELATIVELY DRY. THE SHOWERS AND THUNDERSTORMS WERE MOVING
EAST AT 35 TO 40 MPH... AND WILL AFFECT MUCH OF THE SOUTHERN HALF OF
THE STATE OVER THE EARLY MORNING HOURS.

AS OF 140 AM... NO SEVERE WEATHER HAD BEEN REPORTED TO THE WEATHER
SERVICE IN OHIO SINCE BEFORE MIDNIGHT. HOWEVER THE SHOWERS AND
THUNDERSTORMS THAT WILL AFFECT THE SOUTHERN PART OF THE STATE EARLY
THIS MORNING STILL HAVE THE POTENTIAL TO PRODUCE TORNADOES... DAMAGING
WINDS...  OR HAIL. PEOPLE IN THE WATCH AREA SHOULD CONTINUE TO LISTEN
FOR LATEST INFORMATION FROM THE WEATHER SERVICE.

IN ADDITION... A FLOOD WATCH IS IN EFFECT FOR ALL OF OHIO FOR THE REST
OF TONIGHT. THIS IS BECAUSE THERE IS A THREAT OF HEAVY RAIN AND SOILS
IN MANY PARTS OF THE STATES ARE ALREADY WATERLOGGED.

KWIATKOWSKI
Special weather statement, Jun 9, 2:50 AM EDT, 3 hours 56 minutes before
OHZALL-090845-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CLEVELAND OH
250 AM EDT SAT JUN 9 1990

THE TORNADO WATCH FOR SOUTHERN OHIO WILL BE ALLOWED TO EXPIRE AT 3 AM.

THE FLOOD WATCH FOR MOST OF NORTHERN OHIO WILL BE CANCELED AT 3 AM...
BUT A FLOOD WATCH WILL REMAIN IN EFFECT FOR THE CENTRAL AND SOUTHERN
COUNTIES THIS MORNING.

AT 240 AM WEATHER SERVICE RADAR SHOWED SHOWERS AND THUNDERSTORMS OVER
MUCH OF THE SOUTHERN HALF OF OHIO. MOVEMENT WAS MOSTLY EAST AT 35 TO 40
MPH. THE STORMS WERE WEAKENING... AND THE THREAT OF SEVERE WEATHER IN
SOUTHERN OHIO WAS DECREASING. AS A RESULT THE TORNADO WATCH THERE WILL
BE DROPPED AFTER 3 AM.

NORTHERN OHIO WAS NOT GETTING MUCH RAIN EARLY THIS MORNING... AND IS
EXPECTED TO RECEIVE ONLY SCATTERED PRECIPITATION DURING THE UPCOMING
DAY. FLOODING IS NO LONGER A MAJOR THREAT THERE AND THE FLOOD WATCH HAS
BEEN CANCELED.

IN CENTRAL AND SOUTHERN OHIO WIDESPREAD HEAVY RAIN COULD STILL OCCUR2
THIS MORNING... AND FLOODING REMAINS A THREAT. RESIDENTS OF THE AREA
SHOULD REMAIN ALERT FOR HIGH WATER AND BE PREPARED TO MOVE PROPERTY OUT
OF LOW LYING AREAS.

KWIATKOWSKI

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; the sounding from the Mesonet's radiosonde archive.