Alert archive / Pennsylvania / Tornado Warnings in 2011
Tornado Warning 2, NWS State College, PA
NWS State College, PA issued this tornado warning at Apr 16, 2011, 8:05 PM EDT for Adams County, York County, Pennsylvania. It was in force for 25 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
- Apr 16, 2011, 8:05 PM EDT (00:05 UTC)
- Expired
- Apr 16, 2011, 8:30 PM EDT
- In force
- 25 min
- Issued by
- NWS State College, PA
- Area
- Storm-based polygon
Counties Adams County, PA, York County, PA
The radar
The Sterling radar (KLWX), 107 km from the middle of the area, began a volume at 00:06 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 |
|---|---|---|---|
| Apr 16, 8:20 PM EDT | TORNADO | 1 Nw Holly Heights, PA | *** 2 INJ *** EF0. PATH BEGIN 39.967703 -76.779524...PATH END 39.970876 -76.771306 |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Apr 16, 4:41 PM EDT | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 00:00Z, 0.1 hours before the alert went out and 106 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
- 132 J/kg
- Mixed-layer CIN
- -18 J/kg
- Mixed-layer LCL
- 547 m above ground
- 0-6 km bulk shear
- 77 kt
- 0-1 km storm-relative helicity
- 574 m²/s²
- 0-3 km storm-relative helicity
- 593 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.5
The text
As transmitted, in the capitals the NWS used until 2016.
272 WFUS51 KCTP 170005 TORCTP PAC001-133-170030- /O.NEW.KCTP.TO.W.0002.110417T0005Z-110417T0030Z/ BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE STATE COLLEGE PA 805 PM EDT SAT APR 16 2011 THE NATIONAL WEATHER SERVICE IN STATE COLLEGE PA HAS ISSUED A * TORNADO WARNING FOR... SOUTHEASTERN ADAMS COUNTY IN SOUTH CENTRAL PENNSYLVANIA... WESTERN YORK COUNTY IN SOUTH CENTRAL PENNSYLVANIA... * UNTIL 830 PM EDT * AT 802 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THE STORM CONTAINING THE POSSIBLE TORNADO WAS NEAR MCSHERRYSTOWN AND HANOVER AND MOVING NORTHEAST AT 30 MPH. * LOCATIONS IMPACTED INCLUDE... SPRING GROVE... THOMASVILLE... JACOBUS... 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 I-83 BETWEEN MILE MARKERS 1 AND 8. THIS WILL ALSO IMPACT THE FOLLOWING MAJOR ROADS...ROUTE 30...STATE ROAD 94. PRECAUTIONARY/PREPAREDNESS ACTIONS... IN ADDITION TO THE TORNADO...THIS STORM IS CAPABLE OF PRODUCING DESTRUCTIVE STRAIGHT LINE WINDS. 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 3983 7707 4005 7681 3972 7662 3972 7700 TIME...MOT...LOC 0005Z 245DEG 25KT 3981 7698 $$ FORECASTER: DANGELO
1 follow-up statement
137 WWUS51 KCTP 170016 SVSCTP SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE STATE COLLEGE PA 816 PM EDT SAT APR 16 2011 PAC001-170025- /O.CAN.KCTP.TO.W.0002.000000T0000Z-110417T0030Z/ ADAMS PA- 816 PM EDT SAT APR 16 2011 ...THE TORNADO WARNING FOR SOUTHEASTERN ADAMS COUNTY IS CANCELLED... THE STORM HAS MOVED TO THE EAST...THEREFORE THE TORNADO WARNING HAS BEEN CANCELLED. A TORNADO WATCH REMAINS IN EFFECT UNTIL 1100 PM EDT SATURDAY EVENING FOR SOUTH CENTRAL PENNSYLVANIA. LAT...LON 3972 7691 3990 7695 4005 7681 3972 7662 TIME...MOT...LOC 0015Z 242DEG 33KT 3986 7683 $$ PAC133-170030- /O.CON.KCTP.TO.W.0002.000000T0000Z-110417T0030Z/ YORK PA- 816 PM EDT SAT APR 16 2011 ...A TORNADO WARNING REMAINS IN EFFECT UNTIL 830 PM EDT FOR WESTERN YORK COUNTY... AT 811 PM EDT...WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THE STORM WAS LOCATED NEAR SPRING GROVE...OR 6 MILES EAST OF HANOVER...MOVING NORTHEAST AT 40 MPH. * LOCATIONS IMPACTED INCLUDE... NEW SALEM... JACOBUS... GLEN ROCK... THIS WILL IMPACT ROUTE 30 FROM THOMASVILLE TO JUST WEST OF YORK CITY. PRECAUTIONARY/PREPAREDNESS ACTIONS... IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A STURDY SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE NEAREST DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS. A TORNADO WATCH REMAINS IN EFFECT UNTIL 1100 PM EDT SATURDAY EVENING FOR SOUTH CENTRAL PENNSYLVANIA. && LAT...LON 3972 7691 3990 7695 4005 7681 3972 7662 TIME...MOT...LOC 0015Z 242DEG 33KT 3986 7683 $$ FORECASTER: DANGELO
The office that day
Everything else NWS State College, PA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 16, 8:02 PM EDT | Special Weather Statement | CTP | Columbia, Lebanon, Schuylkill | 58 min |
| Apr 16, 8:25 PM EDT | Severe Thunderstorm Warning | CTP | Dauphin, Lancaster, Lebanon, York | 65 min |
| Apr 16, 8:29 PM EDT | Tornado Warning | CTP | Lancaster, York | 31 min |
| Apr 16, 8:51 PM EDT | Severe Thunderstorm Warning | CTP | Schuylkill | 44 min |
| Apr 16, 9:40 PM EDT | Wind Advisory | CTP | Adams, Bedford, Blair, Cambria, Cameron, Centre and 27 more | 22 hr |
| Apr 16, 10:02 PM EDT | River Flood Warning | CTP | Blair, Huntingdon | 12 hr |
| Apr 16, 10:02 PM EDT | River Flood Warning | CTP | Blair, Huntingdon | 3 hr |
| Apr 16, 10:02 PM EDT | River Flood Warning | CTP | Dauphin, Lebanon, Schuylkill | 28 hr |
| Apr 16, 10:02 PM EDT | River Flood Warning | CTP | Dauphin, Lebanon | 33 hr |
| Apr 16, 10:13 PM EDT | Flash Flood Warning | CTP | Adams | 2 hr |
| Apr 17, 12:24 AM EDT | River Flood Warning | CTP | Dauphin | 38 hr |
| Apr 17, 12:28 PM EDT | River Flood Warning | CTP | Lancaster, York | 19 hr |
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.