Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 113, NWS State College, PA

May 27, 2011Tioga County, Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at May 27, 2011, 5:56 PM EDT for Tioga County, Pennsylvania. It was in force for 64 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 27, 2011, 5:56 PM EDT (21:56 UTC)
Expired: May 27, 2011, 7:00 PM EDT
In force: 64 min
Issued by: NWS State College, PA
Area: Storm-based polygon

County Tioga County, PA

The radar

The Binghamton radar (KBGM), 100 km from the middle of the area, began a volume at 22:00 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.

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 27, 12:57 PM EDT	Severe Thunderstorm Watch	SPC	9 hr

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 9.9 hours before the alert went out and 176 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 39 J/kg
Mixed-layer CIN: -16 J/kg
Mixed-layer LCL: 483 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 37 m²/s²
0-3 km storm-relative helicity: 71 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

457 
WUUS51 KCTP 272156
SVRCTP
PAC117-272300-
/O.NEW.KCTP.SV.W.0113.110527T2156Z-110527T2300Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE STATE COLLEGE PA
556 PM EDT FRI MAY 27 2011

THE NATIONAL WEATHER SERVICE IN STATE COLLEGE PA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  TIOGA COUNTY IN NORTH CENTRAL PENNSYLVANIA...

* UNTIL 700 PM EDT

* AT 548 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM. THE STORM WAS NEAR LEONARD HARRISON STATE
  PARK...MOVING NORTHEAST AT 20 MPH. THIS STORM IS CAPABLE OF
  PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60
  MPH. 

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  WELLSBORO AROUND 610 PM EDT...
  KEENEYVILLE AROUND 630 PM EDT...
  COVINGTON AROUND 635 PM EDT...
  MANSFIELD AROUND 640 PM EDT...
  TIOGA JUNCTION AROUND 655 PM EDT...
  MILLERTON AROUND 700 PM EDT...

THIS WILL IMPACT THE FOLLOWING MAJOR ROADS...ROUTE 6...ROUTE 15.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DOPPLER RADAR HAS INDICATED SOME WEAK ROTATION WITHIN THIS STORM.
WHILE NOT IMMEDIATELY LIKELY...A TORNADO MAY STILL DEVELOP. IF A
TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A
STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM ON THE
LOWEST FLOOR.

SEVERE THUNDERSTORMS PRODUCE DAMAGE. MOVE INSIDE A PERMANENT BUILDING
NOW TO BE SAFE FROM STRONG WIND GUSTS AND LARGE HAIL.

PLEASE REPORT HAIL...STRONG WINDS OR WIND DAMAGE TO THE NATIONAL
WEATHER SERVICE BY CALLING TOLL FREE...1 8 7 7 6 3 3 6 7 7 2.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM EDT FRIDAY
EVENING FOR CENTRAL PENNSYLVANIA.

&&

LAT...LON 4199 7692 4179 7689 4159 7740 4172 7756
      4201 7713 4200 7693
TIME...MOT...LOC 2156Z 227DEG 19KT 4171 7739

$$

FORECASTER: RXR/KOZAR

1 follow-up statement

601 
WWUS51 KCTP 272245
SVSCTP

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
645 PM EDT FRI MAY 27 2011

PAC117-272300-
/O.CON.KCTP.SV.W.0113.000000T0000Z-110527T2300Z/
TIOGA PA-
645 PM EDT FRI MAY 27 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM EDT
FOR TIOGA COUNTY...

AT 640 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED TWO 
VERY STRONG THUNDERSTORMS CAPABLE OF PRODUCING GOLF BALL SIZE 
HAIL...AND DESTRUCTIVE WINDS IN EXCESS OF 70 MPH. THESE STORMS WERE 
LOCATED ALONG A LINE EXTENDING FROM LEONARD HARRISON STATE PARK TO 
KEENEYVILLE...MOVING NORTHEAST AT 20 MPH...AND ARE FOLLOWING 
APPROXIMATELY THE SAME TRACK ABOUT 20 MINUTES APART. THE EASTERN 
STORM IS THE STRONGEST AND ALSO HAS A TORNADO WARNING IN EFFECT AS 
IT MOVES INTO THE TOWN OF TIOGA...BUT THE SECOND STORM IS ALSO 
SHOWING WEAK ROTATION NEAR WELLSBORO. 

SEVERE THUNDERSTORMS WILL BE NEAR...
WELLSBORO AND TIOGA AROUND 650 PM EDT...
TIOGA JUNCTION AROUND 655 PM EDT...
LAWRENCEVILLE AND MANSFIELD AROUND 700 PM EDT...

THIS WILL IMPACT THE FOLLOWING MAJOR ROADS...ROUTE 6...ROUTE 15.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

PLEASE REPORT HAIL...STRONG WINDS OR WIND DAMAGE TO THE NATIONAL 
WEATHER SERVICE BY CALLING TOLL FREE...1 8 7 7 6 3 3 6 7 7 2.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM EDT FRIDAY
EVENING FOR CENTRAL PENNSYLVANIA.

&&

LAT...LON 4199 7692 4179 7689 4159 7740 4172 7756
      4201 7713 4200 7693
TIME...MOT...LOC 2240Z 227DEG 19KT 4173 7737 4187 7718

$$

FORECASTER: EVANEGO/KREKELER

The office that day

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

Issued	Product	Office	Counties	Lasted
May 26, 8:01 PM EDT	Severe Thunderstorm Warning	CTP	Columbia, Lycoming, Montour, Northumberland, Sullivan	59 min
May 26, 8:27 PM EDT	Severe Thunderstorm Warning	CTP	Columbia, Lebanon, Schuylkill	44 min
May 26, 8:29 PM EDT	Special Weather Statement	CTP	Lancaster	46 min
May 26, 10:33 PM EDT	Special Weather Statement	CTP	Bedford	27 min
May 26, 10:59 PM EDT	Areal Flood Advisory	CTP	Bedford, Blair, Cambria, Somerset	3 hr
May 26, 11:24 PM EDT	Special Weather Statement	CTP	Fulton, Huntingdon	36 min
May 27, 12:31 AM EDT	Special Weather Statement	CTP	Cumberland, Perry	59 min
May 27, 12:41 AM EDT	Special Weather Statement	CTP	Sullivan	49 min
May 27, 1:14 AM EDT	Special Weather Statement	CTP	Columbia, Dauphin, Lebanon, Montour, Northumberland, Schuylkill and 2 more	61 min
May 27, 1:21 AM EDT	Special Weather Statement	CTP	Cumberland, Franklin	54 min
May 27, 2:02 AM EDT	Special Weather Statement	CTP	Cumberland, Dauphin	58 min
May 27, 2:48 AM EDT	Special Weather Statement	CTP	Lebanon	57 min
May 27, 2:17 PM EDT	Special Weather Statement	CTP	Somerset	28 min
May 27, 2:50 PM EDT	Areal Flood Advisory	CTP	Bedford, Cambria, Somerset	3 hr
May 27, 3:10 PM EDT	Special Weather Statement	CTP	Bedford	95 min
May 27, 3:19 PM EDT	Severe Thunderstorm Warning	CTP	Bedford, Somerset	67 min
May 27, 3:44 PM EDT	Special Weather Statement	CTP	Cameron	76 min
May 27, 3:51 PM EDT	Severe Thunderstorm Warning	CTP	Bedford, Blair, Cambria, Huntingdon, Somerset	54 min
May 27, 3:59 PM EDT	Special Weather Statement	CTP	Juniata, Perry	46 min
May 27, 4:01 PM EDT	Special Weather Statement	CTP	Columbia	29 min
May 27, 4:14 PM EDT	Severe Thunderstorm Warning	CTP	Clinton, Potter	46 min
May 27, 4:46 PM EDT	Severe Thunderstorm Warning	CTP	Bedford, Blair, Huntingdon, Mifflin	59 min
May 27, 5:01 PM EDT	Severe Thunderstorm Warning	CTP	Clinton, Lycoming, Potter, Tioga	44 min
May 27, 5:05 PM EDT	Special Weather Statement	CTP	Union	25 min
May 27, 5:07 PM EDT	Flash Flood Warning	CTP	Bedford, Blair, Cambria, Huntingdon, Somerset	3 hr
May 27, 5:26 PM EDT	Severe Thunderstorm Warning	CTP	Centre, Clinton, Lycoming, Mifflin, Snyder, Union	49 min
May 27, 5:27 PM EDT	Severe Thunderstorm Warning	CTP	Bedford, Fulton, Huntingdon	63 min
May 27, 5:36 PM EDT	Severe Thunderstorm Warning	CTP	Bedford	69 min
May 27, 5:44 PM EDT	Tornado Warning	CTP	Bedford	46 min
May 27, 5:46 PM EDT	Tornado Warning	CTP	Bedford, Fulton, Huntingdon	59 min
May 27, 5:47 PM EDT	Severe Thunderstorm Warning	CTP	Centre, Huntingdon, Juniata, Mifflin	58 min
May 27, 5:50 PM EDT	Special Weather Statement	CTP	Tioga	55 min
May 27, 5:52 PM EDT	Special Weather Statement	CTP	Lycoming	23 min
May 27, 5:53 PM EDT	Special Weather Statement	CTP	Sullivan	52 min
May 27, 5:59 PM EDT	Severe Thunderstorm Warning	CTP	Columbia, Sullivan	61 min
May 27, 6:01 PM EDT	Tornado Warning	CTP	Tioga	59 min
May 27, 6:06 PM EDT	Special Weather Statement	CTP	Adams	54 min
May 27, 6:15 PM EDT	Tornado Warning	CTP	Bedford, Fulton	45 min
May 27, 6:16 PM EDT	Severe Thunderstorm Warning	CTP	Centre, Clinton, Lycoming, Mifflin, Snyder, Tioga and 1 more	59 min
May 27, 6:26 PM EDT	Special Weather Statement	CTP	York	49 min
May 27, 6:40 PM EDT	Severe Thunderstorm Warning	CTP	Bedford, Cumberland, Franklin, Fulton, Huntingdon, Juniata and 2 more	65 min
May 27, 6:49 PM EDT	Severe Thunderstorm Warning	CTP	Adams, Cumberland, Dauphin, Franklin, Perry, York	71 min
May 27, 7:00 PM EDT	Severe Thunderstorm Warning	CTP	Tioga	45 min
May 27, 7:05 PM EDT	Special Weather Statement	CTP	Dauphin	70 min
May 27, 7:29 PM EDT	Severe Thunderstorm Warning	CTP	Dauphin, Lebanon, York	46 min
May 27, 7:39 PM EDT	Severe Thunderstorm Warning	CTP	Dauphin, Juniata, Mifflin, Northumberland, Perry, Snyder and 1 more	81 min
May 27, 7:42 PM EDT	Areal Flood Advisory	CTP	Tioga	3 hr

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2011 Every severe thunderstorm warning 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.