Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 91, NWS State College, PA

July 4, 2012Bedford County, Fulton County, Somerset County, Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at Jul 4, 2012, 7:33 PM EDT for Bedford County, Fulton County, Somerset County, Pennsylvania. It was in force for 42 min. 2 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: Jul 4, 2012, 7:33 PM EDT (23:33 UTC)
Expired: Jul 4, 2012, 8:15 PM EDT
In force: 42 min
Issued by: NWS State College, PA
Area: Storm-based polygon

Counties Bedford County, PA, Fulton County, PA, Somerset County, PA

The radar

The Sterling radar (KLWX), 130 km from the middle of the area, began a volume at 23:34 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
Jul 4, 7:47 PM EDT	HAIL 1	Hyndman, PA
Jul 4, 8:00 PM EDT	TSTM WND DMG	Buffalo Mills, PA	TREES AND POWERLINES DOWN

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 11.6 hours before the alert went out and 137 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: 31 J/kg
Mixed-layer CIN: -358 J/kg
Mixed-layer LCL: 1643 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: -89 m²/s²
0-3 km storm-relative helicity: -173 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.

176 
WUUS51 KCTP 042333
SVRCTP
PAC009-057-111-050015-
/O.NEW.KCTP.SV.W.0091.120704T2333Z-120705T0015Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE STATE COLLEGE PA
733 PM EDT WED JUL 4 2012

THE NATIONAL WEATHER SERVICE IN STATE COLLEGE PA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN BEDFORD COUNTY IN SOUTH CENTRAL PENNSYLVANIA...
  SOUTHWESTERN FULTON COUNTY IN SOUTH CENTRAL PENNSYLVANIA...
  SOUTHEASTERN SOMERSET COUNTY IN SOUTH CENTRAL PENNSYLVANIA...

* UNTIL 815 PM EDT

* AT 730 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM. THE STORM WAS NEAR NEW BALTIMORE...MOVING
  SOUTHEAST AT 20 MPH. THIS STORM IS CAPABLE OF PRODUCING QUARTER
  SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. 

* LOCATIONS IN THE WARNING INCLUDE...
  LAKE GORDON...
  INGLESMITH AND BARNES GAP...
  COVE MILLS...

THIS WILL IMPACT THE FOLLOWING CENTRAL PENNSYLVANIA INTERSTATES...THE
PENNSYLVANIA TURNPIKE BETWEEN MILE MARKERS 126 AND 137...I-70 BETWEEN
MILE MARKERS 160 AND 170.

THIS WILL ALSO IMPACT THE FOLLOWING MAJOR ROADS...ROUTE 30...ROUTE
220...ROUTE 522.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS CREATE WINDS OF MORE THAN 57 MPH...OR HAIL ONE
INCH OR LARGER.

THIS SEVERE THUNDERSTORM PRODUCED GOLF BALL SIZED HAIL JUST NORTH OF 
BOSWELL. STAY AWAY FROM WINDOWS! IF TIME ALLOWS...PUT AUTOMOBILES 
INTO A CARPORT OR GARAGE.

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.

&&

LAT...LON 3972 7874 3980 7894 4007 7873 3973 7809
      3971 7817
TIME...MOT...LOC 2333Z 308DEG 42KT 3989 7875

$$

FORECASTER: LA CORTE

2 follow-up statements

385 
WWUS51 KCTP 050002
SVSCTP

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
802 PM EDT WED JUL 4 2012

PAC111-050012-
/O.CAN.KCTP.SV.W.0091.000000T0000Z-120705T0015Z/
SOMERSET PA-
802 PM EDT WED JUL 4 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN SOMERSET COUNTY
IS CANCELLED...

THE STORM THAT PROMPTED THE SEVERE THUNDERSTORM WARNING HAS MOVED OUT
OF THE AREA...THEREFORE THE SEVERE THUNDERSTORM WARNING HAS BEEN
CANCELLED.

LAT...LON 3971 7819 3972 7866 3978 7867 3985 7865
      3988 7858 3973 7809 3971 7817
TIME...MOT...LOC 0002Z 319DEG 32KT 3978 7855

$$

PAC009-057-050015-
/O.CON.KCTP.SV.W.0091.000000T0000Z-120705T0015Z/
BEDFORD PA-FULTON PA-
802 PM EDT WED JUL 4 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 815 PM EDT
FOR SOUTHWESTERN FULTON AND SOUTH CENTRAL BEDFORD COUNTIES...

AT 800 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING GOLF BALL SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED
8 MILES WEST OF INGLESMITH...OR 14 MILES NORTHEAST OF CUMBERLAND...
MOVING SOUTHEAST AT 35 MPH.

LOCATIONS IN THE WARNING INCLUDE...
  INGLESMITH AND BARNES GAP...

THIS WILL IMPACT I-70 BETWEEN MILE MARKERS 168 AND 170.

THIS WILL ALSO IMPACT THE FOLLOWING MAJOR ROADS...ROUTE 220...ROUTE
522.

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.

&&

LAT...LON 3971 7819 3972 7866 3978 7867 3985 7865
      3988 7858 3973 7809 3971 7817
TIME...MOT...LOC 0002Z 319DEG 32KT 3978 7855

$$

FORECASTER: DEVOIR

705 
WWUS51 KCTP 050016
SVSCTP

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
816 PM EDT WED JUL 4 2012

PAC009-057-050025-
/O.EXP.KCTP.SV.W.0091.000000T0000Z-120705T0015Z/
BEDFORD PA-FULTON PA-
816 PM EDT WED JUL 4 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN FULTON AND SOUTH
CENTRAL BEDFORD COUNTIES HAS EXPIRED...

THE SEVERE THUNDERSTORM WARNING WAS ALLOWED TO EXPIRE AS THE STORM 
PUSHED SOUTHEASTWARD INTO ALLEGANY COUNTY IN NORTHERN MARYLAND.

LAT...LON 3971 7819 3972 7866 3978 7867 3985 7865
      3988 7858 3973 7809 3971 7817
TIME...MOT...LOC 0002Z 319DEG 32KT 3978 7855

$$

FORECASTER: DEVOIR

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 3, 8:03 PM EDT	Special Weather Statement	CTP	Warren	72 min
Jul 3, 8:37 PM EDT	Severe Thunderstorm Warning	CTP	Warren	38 min
Jul 3, 9:50 PM EDT	Special Weather Statement	CTP	Clearfield, Elk	55 min
Jul 3, 10:36 PM EDT	Special Weather Statement	CTP	Cambria, Centre, Clearfield	54 min
Jul 3, 11:36 PM EDT	Special Weather Statement	CTP	Blair, Cambria, Centre, Huntingdon, Mifflin	29 min
Jul 4, 12:07 AM EDT	Special Weather Statement	CTP	Bedford, Franklin, Fulton, Somerset	53 min
Jul 4, 2:27 AM EDT	Special Weather Statement	CTP	Somerset	63 min
Jul 4, 11:06 AM EDT	Special Weather Statement	CTP	McKean, Warren	69 min
Jul 4, 11:27 AM EDT	Severe Thunderstorm Warning	CTP	Warren	48 min
Jul 4, 11:53 AM EDT	Special Weather Statement	CTP	McKean	37 min
Jul 4, 5:34 PM EDT	Severe Thunderstorm Warning	CTP	Bedford, Cambria, Somerset	41 min
Jul 4, 6:06 PM EDT	Severe Thunderstorm Warning	CTP	Bedford, Somerset	54 min
Jul 4, 6:16 PM EDT	Special Weather Statement	CTP	Centre	44 min
Jul 4, 6:58 PM EDT	Severe Thunderstorm Warning	CTP	Bedford, Somerset	50 min
Jul 4, 7:15 PM EDT	Severe Thunderstorm Warning	CTP	Bedford, Somerset	45 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2012 Every severe thunderstorm warning in 2012

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.