Alert archive / Pennsylvania / Tornado Warnings in 1987

Tornado Warning 1, NWS Pittsburgh, PA

June 8, 1987Beaver County, Pennsylvania

NWS Pittsburgh, PA issued this tornado warning at Jun 8, 1987, 6:25 PM EDT for Beaver County, Pennsylvania. It was in force for 65 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
Jun 8, 1987, 6:25 PM EDT (22:25 UTC)
Expired
Jun 8, 1987, 7:30 PM EDT
In force
65 min
Issued by
NWS Pittsburgh, PA
Area
Whole counties

County Beaver 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
Jun 8, 6:30 PM EDTHail 0.75Beaver, 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, 10.4 hours before the alert went out and 37 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 1987-06-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 20 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 1987-06-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 111 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
20 J/kg
Mixed-layer CIN
-383 J/kg
Mixed-layer LCL
1483 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
111 m²/s²
0-3 km storm-relative helicity
107 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 KPIT 082300
TORPIT
PAC007-082330-
 
BULLETIN - EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE PITTSBURGH PA
625 PM EDT MON JUN 8 1987
 
THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING
EFFECTIVE UNTIL 730 PM EDT FOR THE FOLLOWING COUNTY OF
 
WESTERN PENNSYLVANIA... BEAVER
 
AT 615 PM A SKYWARN SPOTTER SIGHTED A FUNNEL CLOUD NEAR EAST
PALESTINEE
OHIO. THIS STORM IS MOVING EAST AT 25 MPH INTO BEAVER COUNTY
PENNSYLVANIA.
 
IF YOU ARE CAUGHT OUTDOORS...ABANDON YOUR CAR AND GO TO A LOW LYING
AREA
LIKE A DITCH OR RAVINE.  GET AS LOW AS POSSIBLE AND PROTECT YOUR HEAD
AND CHEST.  IF YOU ARE IN A MOBILE HOME ABANDON IT...MOBILE HOME OFFER
NO PROTECTION IN TORNADO-STRENGTH WINDS.
 
WJD/BC

What forecasters said that day

The local office's own words before this tornado 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 8, 3:13 PM EDT, 3 hours 12 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PITTSBURGH, PA
312 PM EDT MON JUN 08 1987

...VERY HEAVY THUNDERSTORMS DEVELOPING ACROSS THE NORTHERN SECTIONS
OF WESTERN PENNSYLVANIA...

AT 310 PM NATIONAL WEATHER SERVICE RADAR SHOWED VERY HEAVY
THUNDERSTORMS DEVELOPING FROM MERCER COUNTY NORTHEASTWARD TO NEAR
EMPORIUM IN CAMERON COUNTY. THE HEAVIEST STORMS WERE LOCATED OVER
FOREST AND ELK COUNTIES AND WERE HEADED TOWARDS CLARION...JEFFERSON
AND CLEARFIELD COUNTIES. ALL THUNDERSTORMS WERE MOVING SOUTHEAST AT
40 MPH.

THESE STORMS WILL CONTAIN STRONG GUSTY WINDS...DANGEROUS LIGHTNING...
HAIL AND HEAVY DOWNPOURS. IF THREATENING WEATHER APPROACHES...GO TO
A SAFE PLACE IMMEDIATELY.

END/COgMEAUX
Special weather statement, Jun 8, 4:36 PM EDT, 1 hour 49 minutes before
SPECIAL WEATHER STATEMENT FOR WESTERN PENNSYLVANIA AND THE NORTHERN
PANHANDLE OF WEST VIRGINIA...
NATIONAL WEATHER SERVICE PITTSBURGH, PA
435 PM EDT MON JUN 08 1987

...SEVERE THUNDERSTORM WATCH NOW IN EFFECT FOR A LARGE PORTION OF
WESTERN PENNSYLVANIA AND THE NORTHERN PANHANDLE OF WEST VIRGINIA...
AND A PORTION OF EASTERN OHIO.

THE NATIONAL SEVERE STORM FORECAST CENTER IN KANSAS CITY HAS ISSUED A
SEVERE THUNDERSTORM WATCH UNTIL 10 PM THIS EVENING FOR A LARGE PORTION
OF WESTERN PENNSYLVNIA...EXCLUDING   THE FOLLOWING COUNTIES IN
WESTERN PENNSYLVANIA...THEY ARE

GREENE...FAYETTE...SOMERSET...BEDFORD AND FULTON. ONLY MARSHALL COUNTY
IN THE NORTHERN PANHANDLE OF WEST VIRGINIA IS EXCLUDED FROM THIS WATCH.

A SEVERE THUNDERSTORM WATCH MEANS SEVERE THUNDERSTORMS ARE POSSIBLE
IN AND CLOSE TO THE WATCH AREA...SO BE ON THE LOOKOUT FOR THREATENING
WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE
WARNINGS.
<
END/COMEAUX
Special weather statement, Jun 8, 5:50 PM EDT, 35 minutes before
COMBINED RADAR AND SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PITTSBURGH, PA
547 PM EDT MON JUN 08 1987

AT 530 PM, PITTSBURGH WEATHER RADAR SHOWED A BAND OF VERY HEAVY
THUNDERSTORMS STRETCHING FROM ELK COUNTY WESTWARD ACROSS FOREST..
CLARION..SOUTHERN VENANGO..MERCER AND LAWRENCE COUNTIES IN PENNSYLVANIA
INTO TRUNBULL..MAHONING AND PORTAGE COUNTIES IN OHIO. THE BAND
CONTINUES WESTWARD TO SOUTH OF CLEVELAND. THESE STORMS ARE MOVING
SOUTHEAST AT 50 MPH AND WILL MOVE INTO BEAVER..BUTLER..JEFFERSON AND
CLEARFIELD COUNTIES DURING THE NEXT HOUR.

A SEVERE THUNDERSTORM WATCH CONTINUES IN EFFECT UNTIL 10 PM FOR
ALMOST ALL OF WESTERN PENNSYLVANIA ..THE NORTHERN PANHANDLE OF
WEST VIRGINIA AND MUCH OF NORTHERN OHIO.

STAY TUNED FOR FURTHER STATEMENTS AND POSSIBLE WARNINGS.
FH/CHH

The office that day

Everything else NWS Pittsburgh, PA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 8, 6:41 PM EDTSevere Thunderstorm WarningPBZArmstrong, Butler59 min
Jun 8, 7:01 PM EDTSevere Thunderstorm WarningPBZAllegheny, Westmoreland59 min

Nearby

Tornado Warnings in Pennsylvania, 1987Every tornado warning in 1987Tornadoes in 1987

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.