Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 1987
Severe Thunderstorm Warning 32, NWS Pittsburgh, PA
NWS Pittsburgh, PA issued this severe thunderstorm warning at Jun 29, 1987, 6:29 PM EDT for Washington County, Westmoreland County, Pennsylvania. It was in force for 61 min. 2 reports 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 29, 1987, 6:29 PM EDT (22:29 UTC)
- Expired
- Jun 29, 1987, 7:30 PM EDT
- In force
- 61 min
- Issued by
- NWS Pittsburgh, PA
- Area
- Whole counties
Counties Washington County, PA, Westmoreland 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
| Time | Report | Where | Remark |
|---|---|---|---|
| Jun 29, 6:30 PM EDT | Hail 1.75 | Washington, PA | |
| Jun 29, 7:00 PM EDT | Thunderstorm Wind 0 | Washington, 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, 10.5 hours before the alert went out and 27 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1685 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 122 m²/s²
- 0-3 km storm-relative helicity
- 129 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
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 29, 4:42 PM EDT, 1 hour 47 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PITTSBURGH, PA 440 PM EDT MON JUN 29 1987 ...HUGE THUNDERSTORM HEADED FOR THE AREA JUST NORTH OF PITTSBURGH... A SEVERE THUNDERSTORM WATCH IS IN EFFECT TIL 10 PM FOR MUCH OF WESTERN PENNSYLVANAI...INCLUDING PITTSBURGH AND ERIE. AT 440 PM...RADAR SHOWED A VERY INTENSE THUNDERSTORM OVER MINERVA OHIO. IT IS MOVING EAST AT 40 MPH. THIS STORM WILL REACH THE NORTHERN PANHANDLE OF WEST VIRGINIA BETWEEN 5 AND 530 PM. THEN IT WILL REACH PENNSYLVANIA COUNTIES OF BEAVER...BUTLER...AND POSSIBLY ALLEGHENY BETWEEN 530 AND 6 PM. VERY STRONG WINDS...FREQUENT LIGHTNING...HEAVY RAIN...AND HAIL WILL ACCOMPANY THIS THUNDERSTORM. THIS THUNDERSTORM MAY SPAWN8 A TORNADO. LISTEN FOR POSSIBLE WARNINGS AND OTHER STATEMENTS.
Special weather statement, Jun 29, 5:53 PM EDT, 36 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PITTSBURGH, PA 545 PM EDT MON JUN 29 1987 THESE COUNTIES IN NORTHWESTERN PENNSYLVANIA HAVE BEEN REMOVED FROM SEVERE THUNDERSTORM WATCH NUMBER 282... ERIE...CRAWFORD...MERCER...LAWRENCE...AND VENANGO. A NEW SEVERE THUNDERSTORM WATCH HAS BEEN ISSUED EAST OF PITTSBURGH. COMBINING BOTH WATCHES...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR THESE COUNTIES OF WESTERN PENNSYLVANIA UNTIL 10 PM... ALLEGHENY ARMSTRONG BEAVER BEDFORD BLAIR BUTLER CAMBRIA CLARION CENTRE CLEARFIELD FAYETTE FOREST FULTON GREENE HUNTINGDON INDIANA JEFFERSON JUNIATA MCKEAN MIFFLIN SOMERSET WARREN WASHINGTON AND WESTMORELAND. LARGE HAIL HAS BEEN REPORTED IN WEIRTON WEST VIRGINIA.
Special weather statement, Jun 29, 6:15 PM EDT, 14 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PITTSBURGH, PA 615 PM EDT MON JUN 29 1987 MORE COUNTIES IN NORTH PENNSYLVANIA HAVE BEEN REMOVED FROM SEVERE THUNDERSTORM WATCH NUMBER 282... CLARION...FOREST...JEFFERSON...MCKEAN...AND WARREN. COMBINING BOTH WATCHES...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR THESE COUNTIES OF WESTERN PENNSYLVANIA UNTIL 10 PM... ALLEGHENY ARMSTRONG BEAVER BEDFORD BLAIR BUTLER CAMBRIA CENTRE CLEARFIELD FAYETTE FULTON GREENE HUNTINGDON INDIANA JUNIATA MIFFLIN SOMERSET WASHINGTON AND WESTMORELAND. A SEVERE THUNDERSTORM WARNING CONTINUES UNTIL 7PM FOR THE COUNTIES OF ALLEGHENY..WASHINGTON..WESTMORELAND.
The office that day
Everything else NWS Pittsburgh, PA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 29, 4:49 PM EDT | Severe Thunderstorm Warning | PBZ | Beaver | 61 min |
| Jun 29, 5:09 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Washington | 66 min |
| Jun 29, 6:02 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Washington, Westmoreland | 58 min |
| Jun 29, 7:00 PM EDT | Tornado Warning | PBZ | Fayette | 60 min |
| Jun 29, 7:35 PM EDT | Severe Thunderstorm Warning | PBZ | Greene | 70 min |
| Jun 29, 7:52 PM EDT | Severe Thunderstorm Warning | PBZ | Greene | 68 min |
| Jun 29, 5:31 PM EDT | Severe Thunderstorm Warning | PBZ | Brooke | 59 min |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 1987Every severe thunderstorm warning 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.