Alert archive / Pennsylvania / Tornado Warnings in 2011
Tornado Warning 21, NWS State College, PA
NWS State College, PA issued this tornado warning at May 23, 2011, 11:39 PM EDT for McKean County, Pennsylvania. It was in force for 36 min. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- May 23, 2011, 11:39 PM EDT (03:39 UTC)
- Expired
- May 24, 2011, 12:15 AM EDT
- In force
- 36 min
- Issued by
- NWS State College, PA
- Area
- Storm-based polygon
County McKean County, PA
The radar
The State College radar (KCCX), 115 km from the middle of the area, began a volume at 03:41 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 |
|---|---|---|---|
| May 23, 11:50 PM EDT | HAIL 0.75 | Bradford, PA |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Buffalo Intl Airport, NY (KBUF), launched 00:00Z, 3.7 hours before the alert went out and 116 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
- 191 J/kg
- Mixed-layer CIN
- -15 J/kg
- Mixed-layer LCL
- 1252 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 172 m²/s²
- 0-3 km storm-relative helicity
- 226 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 1.4
The text
As transmitted, in the capitals the NWS used until 2016.
922 WFUS51 KCTP 240339 TORCTP PAC083-240415- /O.NEW.KCTP.TO.W.0021.110524T0339Z-110524T0415Z/ BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE STATE COLLEGE PA 1139 PM EDT MON MAY 23 2011 THE NATIONAL WEATHER SERVICE IN STATE COLLEGE PA HAS ISSUED A * TORNADO WARNING FOR... NORTHERN MCKEAN COUNTY IN NORTH CENTRAL PENNSYLVANIA... * UNTIL 1215 AM EDT * AT 1138 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THE STORM CONTAINING THE POSSIBLE TORNADO WAS NEAR MARSHBURG...MOVING EAST AT 60 MPH. * THE TORNADO WILL BE NEAR... BRADFORD AROUND 1145 PM EDT... REW AROUND 1155 PM EDT... CORYVILLE AROUND MIDNIGHT EDT... 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. THIS WILL IMPACT THE FOLLOWING MAJOR ROADS...ROUTE 219...STATE ROAD 46...STATE ROAD 59...STATE ROAD 446. PRECAUTIONARY/PREPAREDNESS ACTIONS... TORNADOES ARE DIFFICULT TO SEE AND CONFIRM AT NIGHT. IF YOU WAIT TO SEE OR HEAR IT COMING...IT MAY BE TOO LATE TO GET TO A SAFE PLACE. TAKE COVER INSIDE NOW. DO NOT WAIT TO SEE OR HEAR THE TORNADO. MOVE TO AN INTERIOR ROOM ON THE LOWEST LEVEL OF A STURDY BUILDING. PUT AS MANY WALLS BETWEEN YOU AND THE OUTSIDE AS YOU CAN. AVOID WINDOWS. PROTECT YOURSELF FROM FLYING DEBRIS. && LAT...LON 4183 7821 4183 7887 4200 7888 4200 7821 TIME...MOT...LOC 0340Z 272DEG 50KT 4192 7874 $$ FORECASTER: STEINBUGL
2 follow-up statements
483 WWUS51 KCTP 240403 SVSCTP SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE STATE COLLEGE PA 1203 AM EDT TUE MAY 24 2011 PAC083-240415- /O.CON.KCTP.TO.W.0021.000000T0000Z-110524T0415Z/ MCKEAN PA- 1203 AM EDT TUE MAY 24 2011 ...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1215 AM EDT FOR NORTHEASTERN MCKEAN COUNTY... AT 1159 PM EDT...WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A SEVERE THUNDERSTORM WITH STRONG ROTATION THAT MAY BE PRODUCING A TORNADO. THIS STORM THAT MAY BE PRODUCING A TORNADO WAS LOCATED NEAR ELDRED...OR 10 MILES SOUTH OF OLEAN...MOVING EAST AT 55 MPH. THIS WILL IMPACT THE FOLLOWING MAJOR ROADS...STATE ROAD 46...STATE ROAD 446. PRECAUTIONARY/PREPAREDNESS ACTIONS... IN ADDITION TO THE TORNADO...THIS STORM IS CAPABLE OF PRODUCING LARGE HAIL HAIL AND DESTRUCTIVE STRAIGHT LINE WINDS. && LAT...LON 4184 7821 4184 7849 4200 7850 4200 7821 TIME...MOT...LOC 0403Z 271DEG 49KT 4194 7836 $$ FORECASTER: STEINBUGL
720 WWUS51 KCTP 240417 SVSCTP SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE STATE COLLEGE PA 1217 AM EDT TUE MAY 24 2011 PAC083-240426- /O.EXP.KCTP.TO.W.0021.000000T0000Z-110524T0415Z/ MCKEAN PA- 1217 AM EDT TUE MAY 24 2011 ...THE TORNADO WARNING FOR NORTHEASTERN MCKEAN COUNTY HAS EXPIRED... THE TORNADO WARNING WAS ALLOWED TO EXPIRE...AS THE STORM IS MOVING OUT OF THE COUNTY. LAT...LON 4184 7821 4184 7849 4200 7850 4200 7821 TIME...MOT...LOC 0403Z 271DEG 49KT 4194 7836 $$ FORECASTER: STEINBUGL
The office that day
Everything else NWS State College, PA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 23, 8:52 PM EDT | Severe Thunderstorm Warning | CTP | McKean, Warren | 53 min |
| May 23, 9:46 PM EDT | Special Weather Statement | CTP | McKean | 29 min |
| May 23, 10:17 PM EDT | Special Weather Statement | CTP | McKean | 43 min |
| May 23, 10:24 PM EDT | Special Weather Statement | CTP | Warren | 51 min |
| May 23, 11:01 PM EDT | Special Weather Statement | CTP | Warren | 44 min |
| May 23, 11:17 PM EDT | Areal Flood Advisory | CTP | McKean, Potter, Warren | 3 hr |
| May 23, 11:18 PM EDT | Severe Thunderstorm Warning | CTP | McKean, Warren | 42 min |
| May 24, 12:09 AM EDT | Severe Thunderstorm Warning | CTP | McKean, Potter | 51 min |
| May 24, 12:29 AM EDT | Areal Flood Advisory | CTP | Cameron, Elk, McKean, Potter, Warren | 3 hr |
| May 24, 12:43 AM EDT | Severe Thunderstorm Warning | CTP | McKean, Potter | 17 min |
| May 24, 12:53 AM EDT | Special Weather Statement | CTP | Tioga | 37 min |
| May 24, 1:05 AM EDT | Special Weather Statement | CTP | McKean, Potter, Tioga | 55 min |
| May 24, 1:13 AM EDT | Special Weather Statement | CTP | Bedford, Blair, Cambria, Somerset | 92 min |
| May 24, 6:59 PM EDT | Special Weather Statement | CTP | Somerset | 76 min |
| May 24, 7:18 PM EDT | Special Weather Statement | CTP | Clearfield | 57 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.