Alert archive / Pennsylvania / Tornado Warnings in 2016

Tornado Warning 4, NWS State College, PA

September 17, 2016McKean County, Warren County, Pennsylvania

NWS State College, PA issued this tornado warning at Sep 17, 2016, 6:28 PM EDT for McKean County, Warren County, Pennsylvania. It was in force for 32 min. 5 reports 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
Sep 17, 2016, 6:28 PM EDT (22:28 UTC)
Expired
Sep 17, 2016, 7:00 PM EDT
In force
32 min
Issued by
NWS State College, PA
Area
Storm-based polygon
Tornado
Radar indicated
Hail
0.0 in

Counties McKean County, PA, Warren County, PA

The radar

The Buffalo radar (KBUF), 111 km from the middle of the area, began a volume at 22:31 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

TimeReportWhereRemark
Sep 17, 6:35 PM EDTTSTM WND DMGScandia, PASTORAGE BARN DAMAGED IN SCANDIA.
Sep 17, 6:35 PM EDTTSTM WND DMGScandia, PATREES AND WIRES DOWN ON PETERSON ROAD.
Sep 17, 6:35 PM EDTTORNADOScandia, PAUNCONFIRMED TORNADO VICINITY PETERSON ROAD NEAR SCANDIA.
Sep 17, 6:35 PM EDTTORNADOScandia, PAAN EF1 TORNADO WAS CONFIRMED NEAR SCANDIA IN WARREN COUNTY. THE PATH LENGTH WAS APPROXIMATELY 1.25 MILES...WITH A MAX PATH WIDTH OF 40 YARDS. NO INJURIES WERE REPORTED.
Sep 17, 6:35 PM EDTTORNADOScandia, PACONFIRMED EF1 TORNADO

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 12:00Z, 10.5 hours before the alert went out and 109 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.

Skew-T log-pSkew-T log-p diagram, Buffalo Intl Airport, NY at 12:00Z on 2016-09-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 48 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Buffalo Intl Airport, NY at 12:00Z on 2016-09-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 226 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
48 J/kg
Mixed-layer CIN
-304 J/kg
Mixed-layer LCL
980 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
226 m²/s²
0-3 km storm-relative helicity
222 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

729 
WFUS51 KCTP 172228
TORCTP
PAC083-123-172300-
/O.NEW.KCTP.TO.W.0004.160917T2228Z-160917T2300Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE STATE COLLEGE PA
628 PM EDT SAT SEP 17 2016

THE NATIONAL WEATHER SERVICE IN STATE COLLEGE PA HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHWESTERN MCKEAN COUNTY IN NORTH CENTRAL PENNSYLVANIA...
  NORTHEASTERN WARREN COUNTY IN NORTH CENTRAL PENNSYLVANIA...

* UNTIL 700 PM EDT.

* AT 628 PM EDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO WAS LOCATED OVER SCANDIA...MOVING EAST AT 30 MPH.

  HAZARD...TORNADO. 

  SOURCE...RADAR INDICATED ROTATION. 

  IMPACT...FLYING DEBRIS WILL BE DANGEROUS TO THOSE CAUGHT WITHOUT
           SHELTER. MOBILE HOMES WILL BE DAMAGED OR DESTROYED.
           DAMAGE TO ROOFS...WINDOWS...AND VEHICLES WILL OCCUR. TREE
           DAMAGE IS LIKELY. 

* THIS TORNADIC THUNDERSTORM WILL REMAIN OVER MAINLY RURAL AREAS OF
  NORTHWESTERN MCKEAN AND NORTHEASTERN WARREN COUNTIES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! MOVE TO A BASEMENT OR AN INTERIOR ROOM ON THE LOWEST
FLOOR OF A STURDY BUILDING. AVOID WINDOWS. IF YOU ARE OUTDOORS...IN
A MOBILE HOME...OR IN A VEHICLE...MOVE TO THE CLOSEST SUBSTANTIAL
SHELTER AND PROTECT YOURSELF FROM FLYING DEBRIS.

&&

LAT...LON 4200 7866 4186 7912 4193 7914 4200 7893
TIME...MOT...LOC 2228Z 248DEG 28KT 4192 7905 

TORNADO...RADAR INDICATED
HAIL...0.00IN

$$

LA CORTE
2 follow-up statements
968 
WWUS51 KCTP 172249
SVSCTP

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
649 PM EDT SAT SEP 17 2016

PAC123-172258-
/O.CAN.KCTP.TO.W.0004.000000T0000Z-160917T2300Z/
WARREN PA-
649 PM EDT SAT SEP 17 2016

...THE TORNADO WARNING FOR NORTHEASTERN WARREN COUNTY IS CANCELLED...
    
THE TORNADIC THUNDERSTORM WHICH PROMPTED THE WARNING HAS MOVED INTO
WARREN COUNTY.  THEREFORE...THE WARNING HAS BEEN CANCELLED.

LAT...LON 4200 7867 4194 7886 4197 7892 4200 7892
TIME...MOT...LOC 2248Z 248DEG 28KT 4198 7885 

$$

PAC083-172300-
/O.CON.KCTP.TO.W.0004.000000T0000Z-160917T2300Z/
MCKEAN PA-
649 PM EDT SAT SEP 17 2016

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 700 PM EDT FOR
NORTHWESTERN MCKEAN COUNTY...
    
AT 648 PM EDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO
WAS LOCATED NEAR ALLEGANY STATE PARK...MOVING EAST AT 30 MPH.

HAZARD...TORNADO. 

SOURCE...RADAR INDICATED ROTATION. 

IMPACT...FLYING DEBRIS WILL BE DANGEROUS TO THOSE CAUGHT WITHOUT
         SHELTER. MOBILE HOMES WILL BE DAMAGED OR DESTROYED. DAMAGE
         TO ROOFS...WINDOWS...AND VEHICLES WILL OCCUR.  TREE DAMAGE
         IS LIKELY. 

LOCATIONS IMPACTED INCLUDE...
ALLEGANY STATE PARK.

LAT...LON 4200 7867 4194 7886 4197 7892 4200 7892
TIME...MOT...LOC 2248Z 248DEG 28KT 4198 7885 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

LA CORTE
021 
WWUS51 KCTP 172310
SVSCTP

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
710 PM EDT SAT SEP 17 2016

PAC083-172319-
/O.EXP.KCTP.TO.W.0004.000000T0000Z-160917T2300Z/
MCKEAN PA-
710 PM EDT SAT SEP 17 2016

...THE TORNADO WARNING FOR NORTHWESTERN MCKEAN COUNTY HAS EXPIRED...
        
THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE AREA.

LAT...LON 4200 7867 4194 7886 4197 7892 4200 7892
TIME...MOT...LOC 2308Z 248DEG 28KT 4198 7885 

$$

LA CORTE

The office that day

Everything else NWS State College, PA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Sep 17, 5:54 PM EDTSevere Thunderstorm WarningCTPMcKean, Warren57 min

Nearby

Tornado Warnings in Pennsylvania, 2016Every tornado warning in 2016Tornadoes in 2016

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.