Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 339, NWS Pittsburgh, PA
NWS Pittsburgh, PA issued this severe thunderstorm warning at Sep 7, 1998, 9:01 AM EDT for Fayette County, Westmoreland County, Pennsylvania. It was in force for 59 min. 3 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
- Sep 7, 1998, 9:01 AM EDT (13:01 UTC)
- Expired
- Sep 7, 1998, 10:00 AM EDT
- In force
- 59 min
- Issued by
- NWS Pittsburgh, PA
- Area
- Whole counties
Counties Fayette County, PA, Westmoreland County, PA
The radar
The Pittsburgh radar (KPBZ), 73 km from the middle of the area, began a volume at 13:00 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Sep 7, 9:35 AM EDT | Thunderstorm Wind 52 | Greensburg, PA | A spotter reported a thunderstorm gust to 60 MPH. |
| Sep 7, 9:45 AM EDT | Thunderstorm Wind | Connellsville, PA | Thunderstorm winds downed several large tree limbs. |
| Sep 7, 9:55 AM EDT | Thunderstorm Wind | Ligonier, PA | Thunderstorm winds blew a large tree down onto several power lines. |
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.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Sep 7, 8:15 AM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Pittsburgh, PA (KPIT), launched 12:00Z, 1.0 hours before the alert went out and 57 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
- 1483 J/kg
- Mixed-layer CIN
- -94 J/kg
- Mixed-layer LCL
- 932 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 16 m²/s²
- 0-3 km storm-relative helicity
- 29 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.1
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, Sep 7, 5:10 AM EDT, 3 hours 51 minutes before
OHZ039>041-048>050-057>059-068-069-PAZ029-031-WVZ001>004-012-021-022- 071600- SEVERE WEATHER POTENTIAL NATIONAL WEATHER SERVICE PITTSBURGH PA 510 AM EDT MON SEP 7 1998 ...STRONG OR SEVERE THUNDERSTORMS ARE POSSIBLE TODAY ACROSS WESTERN PENNSYLVANIA...EAST CENTRAL OHIO...NORTHERN WEST VIRGINIA AND GARRETT COUNTY MARYLAND... THUNDERSTORMS WITH STRONG GUSTY WINDS...HAIL AND HEAVY DOWNPOURS ARE EXPECTED TODAY AS A COLD FRONT MOVES SOUTHEAST THROUGH THE AREA. THE MAIN THREAT FROM THESE STORMS SHOULD BE DUE TO STRONG GUSTY THUNDERSTORM WINDS EXCEEDING 40 MPH AND HAIL. IN ADDITION...FREQUENT LIGHTNING CAN ALSO BE EXPECTED. A SEVERE THUNDERSTORM WATCH HAS ALREADY BEEN ISSUED FOR CARROLL... COLUMBIANA AND TUSCARAWAS COUNTIES IN EAST CENTRAL OHIO UNTIL 10 AM THIS MORNING. THERE IS A GOOD POSSIBILITY THAT FUTURE WATCHES MAY BE ISSUED FOR OTHER PORTIONS OF THE FORECAST AREA. A SLOWLY MOVING COLD FRONT APPROACHING FROM THE GREAT LAKES WILL SAG SOUTHWARD INTO OUR AREA THIS MORNING. LATE THIS AFTERNOON OR EVENING THE COLD FRONT WILL MOVE SOUTH INTO NORTHERN WEST VIRGINIA. SKYWARN ACTIVATION IS LIKELY THROUGHOUT THE DAY. TUNE TO NOAA WEATHER RADIO FOR FURTHER WEATHER $UPDATES. THESE ARE ALSO AVAILABLE ON OUR WEB SITE AT WWW.NWS.NOAA.GOV/ER/PIT DE MARIS/GIORDANO
Special weather statement, Sep 7, 5:10 AM EDT, 3 hours 51 minutes before
OHZ039>041-048>050-057>059-068-069-PAZ029-031-WVZ001>004-012-021-022- 071600- SEVERE WEATHER POTENTIAL NATIONAL WEATHER SERVICE PITTSBURGH PA 510 AM EDT MON SEP 7 1998 ...STRONG OR SEVERE THUNDERSTORMS ARE POSSIBLE TODAY ACROSS WESTERN PENNSYLVANIA...EAST CENTRAL OHIO...NORTHERN WEST VIRGINIA AND GARRETT COUNTY MARYLAND... THUNDERSTORMS WITH STRONG GUSTY WINDS...HAIL AND HEAVY DOWNPOURS ARE EXPECTED TODAY AS A COLD FRONT MOVES SOUTHEAST THROUGH THE AREA. THE MAIN THREAT FROM THESE STORMS SHOULD BE DUE TO STRONG GUSTY THUNDERSTORM WINDS EXCEEDING 40 MPH AND HAIL. IN ADDITION...FREQUENT LIGHTNING CAN ALSO BE EXPECTED. A SEVERE THUNDERSTORM WATCH HAS ALREADY BEEN ISSUED FOR CARROLL... COLUMBIANA AND TUSCARAWAS COUNTIES IN EAST CENTRAL OHIO UNTIL 10 AM THIS MORNING. THERE IS A GOOD POSSIBILITY THAT FUTURE WATCHES MAY BE ISSUED FOR OTHER PORTIONS OF THE FORECAST AREA. A SLOWLY MOVING COLD FRONT APPROACHING FROM THE GREAT LAKES WILL SAG SOUTHWARD INTO OUR AREA THIS MORNING. LATE THIS AFTERNOON OR EVENING THE COLD FRONT WILL MOVE SOUTH INTO NORTHERN WEST VIRGINIA. SKYWARN ACTIVATION IS LIKELY THROUGHOUT THE DAY. TUNE TO NOAA WEATHER RADIO FOR FURTHER WEATHER $UPDATES. THESE ARE ALSO AVAILABLE ON OUR WEB SITE AT WWW.NWS.NOAA.GOV/ER/PIT DE MARIS/GIORDANO
Local storm report, Sep 7, 8:39 AM EDT, 22 minutes before
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</html>The office that day
Everything else NWS Pittsburgh, PA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 7, 7:35 AM EDT | Severe Thunderstorm Warning | PBZ | Belmont, Guernsey, Noble | 42 min |
| Sep 7, 7:43 AM EDT | Severe Thunderstorm Warning | PBZ | Columbiana | 43 min |
| Sep 7, 8:14 AM EDT | Severe Thunderstorm Warning | PBZ | Belmont, Jefferson | 46 min |
| Sep 7, 4:23 PM EDT | Severe Thunderstorm Warning | PBZ | Noble | 57 min |
| Sep 7, 5:04 PM EDT | Severe Thunderstorm Warning | PBZ | Monroe | 46 min |
| Sep 7, 8:12 AM EDT | Severe Thunderstorm Warning | PBZ | Butler, Venango | 56 min |
| Sep 7, 8:20 AM EDT | Severe Thunderstorm Warning | PBZ | Lawrence | 40 min |
| Sep 7, 8:38 AM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Beaver, Washington | 57 min |
| Sep 7, 8:46 AM EDT | Severe Thunderstorm Warning | PBZ | Clarion, Forest | 59 min |
| Sep 7, 8:20 AM EDT | Severe Thunderstorm Warning | PBZ | Brooke, Hancock | 60 min |
| Sep 7, 8:20 AM EDT | Severe Thunderstorm Warning | PBZ | Marshall, Ohio | 60 min |
| Sep 7, 5:15 PM EDT | Severe Thunderstorm Warning | PBZ | Wetzel | 45 min |
| Sep 7, 5:51 PM EDT | Tornado Warning | PBZ | Wetzel | 30 min |
| Sep 7, 6:58 PM EDT | Severe Thunderstorm Warning | PBZ | Tucker | 52 min |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 1998Every severe thunderstorm warning in 1998
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; radar from the NEXRAD Level II archive.