Alert archive / Pennsylvania / Tornado Warnings in 2011
Tornado Warning 6, NWS Pittsburgh, PA
NWS Pittsburgh, PA issued this tornado warning at May 23, 2011, 9:07 PM EDT for Mercer County, Pennsylvania. It was in force for 38 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- May 23, 2011, 9:07 PM EDT (01:07 UTC)
- Expired
- May 23, 2011, 9:45 PM EDT
- In force
- 38 min
- Issued by
- NWS Pittsburgh, PA
- Area
- Storm-based polygon
County Mercer County, PA
The radar
The Pittsburgh radar (KPBZ), 81 km from the middle of the area, began a volume at 01:10 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.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| May 23, 8:31 PM EDT | Severe Thunderstorm Watch | SPC | 3 hr |
The nearest sounding before it
Pittsburgh, PA (KPIT), launched 00:00Z, 1.1 hours before the alert went out and 96 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
- 369 J/kg
- Mixed-layer CIN
- -48 J/kg
- Mixed-layer LCL
- 1384 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 191 m²/s²
- 0-3 km storm-relative helicity
- 340 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 4.2
The text
As transmitted, in the capitals the NWS used until 2016.
749 WFUS51 KPBZ 240107 TORPBZ PAC085-240145- /O.NEW.KPBZ.TO.W.0006.110524T0107Z-110524T0145Z/ BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE PITTSBURGH PA 907 PM EDT MON MAY 23 2011 THE NATIONAL WEATHER SERVICE IN PITTSBURGH HAS ISSUED A * TORNADO WARNING FOR... SOUTHERN MERCER COUNTY IN NORTHWEST PENNSYLVANIA... * UNTIL 945 PM EDT * AT 906 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR SHARON... MOVING EAST AT 35 MPH. * OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO FARRELL... SHARON... HERMITAGE... FREDONIA... MERCER... STONEBORO... GROVE CITY... PRECAUTIONARY/PREPAREDNESS ACTIONS... WHEN A TORNADO WARNING IS ISSUED BASED ON DOPPLER RADAR...IT MEANS THAT STRONG ROTATION HAS BEEN DETECTED IN THE STORM. A TORNADO MAY ALREADY BE ON THE GROUND...OR IS EXPECTED TO DEVELOP SHORTLY. IF YOU ARE IN THE PATH OF THIS DANGEROUS STORM...MOVE INDOORS AND TO THE LOWEST LEVEL OF THE BUILDING. STAY AWAY FROM WINDOWS. IF DRIVING...DO NOT SEEK SHELTER UNDER A HIGHWAY OVERPASS. PLEASE REPORT SEVERE WEATHER TO THE NATIONAL WEATHER SERVICE BY CALLING TOLL FREE. 1-877-633-6772. WHEN YOU CAN DO SO SAFELY. && LAT...LON 4136 8006 4111 8008 4118 8052 4131 8052 TIME...MOT...LOC 0107Z 268DEG 32KT 4126 8053 $$ 15
2 follow-up statements
850 WWUS51 KPBZ 240115 SVSPBZ SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE PITTSBURGH PA 915 PM EDT MON MAY 23 2011 PAC085-240145- /O.CON.KPBZ.TO.W.0006.000000T0000Z-110524T0145Z/ MERCER PA- 915 PM EDT MON MAY 23 2011 ...A TORNADO WARNING REMAINS IN EFFECT UNTIL 945 PM EDT FOR MERCER COUNTY... AT 910 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A TORNADO. THIS TORNADO WAS LOCATED NEAR PRITCHARDS CORNER...MOVING EAST AT 35 MPH. * OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO SHARON... HERMITAGE... FARRELL... FREDONIA... MERCER... GROVE CITY... STONEBORO... IN ADDITION TO THE TORNADO...THIS STORM IS CAPABLE OF PRODUCING LARGE HAIL AND DESTRUCTIVE STRAIGHT LINE WINDS. TAKE COVER IN AN INTERIOR ROOM OF THE LOWEST FLOOR WHEN THIS STORM APPROACHES. PLEASE REPORT SEVERE WEATHER TO THE NATIONAL WEATHER SERVICE BY CALLING TOLL FREE. 1-877-633-6772. WHEN YOU CAN DO SO SAFELY. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 200 AM EDT TUESDAY MORNING FOR EAST CENTRAL OHIO AND WESTERN PENNSYLVANIA AND NORTHERN WEST VIRGINIA. LAT...LON 4136 8006 4111 8008 4118 8052 4131 8052 TIME...MOT...LOC 0114Z 265DEG 32KT 4127 8045 $$ 15
623 WWUS51 KPBZ 240139 SVSPBZ SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE PITTSBURGH PA 939 PM EDT MON MAY 23 2011 PAC085-240149- /O.EXP.KPBZ.TO.W.0006.000000T0000Z-110524T0145Z/ MERCER PA- 939 PM EDT MON MAY 23 2011 ...THE TORNADO WARNING FOR MERCER COUNTY EXPIRES AT 945 PM EDT... THE STORM THAT PROMPTED THE WARNING HAS WEAKENED. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 200 AM EDT TUESDAY MORNING FOR EAST CENTRAL OHIO AND WESTERN PENNSYLVANIA AND NORTHERN WEST VIRGINIA. LAT...LON 4136 8006 4111 8008 4118 8052 4131 8052 TIME...MOT...LOC 0139Z 265DEG 32KT 4129 8015 $$ 15
The office that day
Everything else NWS Pittsburgh, PA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 23, 8:15 PM EDT | Special Weather Statement | PBZ | Lawrence, Mercer | 30 min |
| May 23, 8:51 PM EDT | Severe Thunderstorm Warning | PBZ | Mercer | 39 min |
| May 23, 9:38 PM EDT | Special Weather Statement | PBZ | Venango | 37 min |
| May 23, 11:15 PM EDT | Special Weather Statement | PBZ | Venango | 60 min |
| May 24, 12:10 AM EDT | Special Weather Statement | PBZ | Armstrong, Clarion, Indiana, Jefferson, Westmoreland | 35 min |
| May 24, 7:11 PM EDT | Special Weather Statement | PBZ | Beaver | 49 min |
Nearby
Tornado Warnings in Pennsylvania, 2011Every tornado warning in 2011Tornadoes in 2011
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; radar from the NEXRAD Level II archive.