Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 73, NWS State College, PA

June 29, 20128 counties in Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at Jun 29, 2012, 2:54 AM EDT for 8 counties in Pennsylvania. It was in force for 51 min. 13 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
Jun 29, 2012, 2:54 AM EDT (06:54 UTC)
Expired
Jun 29, 2012, 3:45 AM EDT
In force
51 min
Issued by
NWS State College, PA
Area
Storm-based polygon

Counties Centre County, PA, Clinton County, PA, Huntingdon County, PA, Juniata County, PA, Mifflin County, PA, Perry County, PA, Snyder County, PA, Union County, PA

The radar

The State College radar (KCCX), 18 km from the middle of the area, began a volume at 06:57 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
Jun 29, 2:54 AM EDTTSTM WND DMGBellefonte, PATREES AND WIRES DOWN
Jun 29, 2:55 AM EDTTSTM WND DMG1 Sse Bush Addition, PATREES AND WIRES DOWN
Jun 29, 2:55 AM EDTTSTM WND DMGBellefonte, PATREES AND WIRES DOWN
Jun 29, 2:55 AM EDTTSTM WND DMGBig Spring, PATREES AND WIRES DOWN
Jun 29, 2:55 AM EDTTSTM WND GST 50State College, PAROOFTOP GUST AT INNOVATION PARK
Jun 29, 2:56 AM EDTTSTM WND DMG1 Wnw Hunter Park, PATREES AND WIRES DOWN
Jun 29, 2:57 AM EDTTSTM WND DMG1 Ene Axemann, PATREES AND WIRES DOWN
Jun 29, 2:57 AM EDTTSTM WND DMG1 Ssw Houserville, PATREE DAMAGE
Jun 29, 2:57 AM EDTTSTM WND DMGAxemann, PATREES AND WIRES DOWN
Jun 29, 3:01 AM EDTTSTM WND DMG1 Wnw Farmers Mills, PATREES AND WIRES DOWN
Jun 29, 3:03 AM EDTTSTM WND DMG1 Ene Old Fort, PATREES AND WIRES DOWN
Jun 29, 3:12 AM EDTTSTM WND DMGMillheim, PATREES AND WIRES DOWN
Jun 29, 3:29 AM EDTTSTM WND DMGNewport, PATREES DOWN

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

The nearest sounding before it

Pittsburgh, PA (KPIT), launched 00:00Z, 6.9 hours before the alert went out and 202 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, Pittsburgh, PA at 00:00Z on 2012-06-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 624 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Pittsburgh, PA at 00:00Z on 2012-06-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 82 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
624 J/kg
Mixed-layer CIN
-472 J/kg
Mixed-layer LCL
2198 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
82 m²/s²
0-3 km storm-relative helicity
178 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.

742 
WUUS51 KCTP 290654
SVRCTP
PAC027-035-061-067-087-099-109-119-290800-
/O.NEW.KCTP.SV.W.0073.120629T0654Z-120629T0800Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE STATE COLLEGE PA
254 AM EDT FRI JUN 29 2012

THE NATIONAL WEATHER SERVICE IN STATE COLLEGE PA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN HUNTINGDON COUNTY IN CENTRAL PENNSYLVANIA...
  NORTHEASTERN JUNIATA COUNTY IN CENTRAL PENNSYLVANIA...
  NORTHERN MIFFLIN COUNTY IN CENTRAL PENNSYLVANIA...
  NORTH CENTRAL PERRY COUNTY IN SOUTH CENTRAL PENNSYLVANIA...
  SNYDER COUNTY IN CENTRAL PENNSYLVANIA...
  SOUTHERN UNION COUNTY IN CENTRAL PENNSYLVANIA...
  CENTRE COUNTY IN CENTRAL PENNSYLVANIA...
  SOUTHEASTERN CLINTON COUNTY IN NORTH CENTRAL PENNSYLVANIA...

* UNTIL 400 AM EDT

* AT 252 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM. THE STORM WAS NEAR UNIONVILLE...MOVING EAST AT
  45 MPH. THIS STORM IS CAPABLE OF PRODUCING ONE INCH DIAMETER
  HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. 

* LOCATIONS IN THE WARNING INCLUDE...
  PLEASANT GAP AND BELLEFONTE...
  CENTRE HALL AND ZION...
  POTTERS MILLS...
  SEVEN MOUNTAINS AND MILROY...
  POE VALLEY STATE PARK AND MILLHEIM...
  REEDS GAP STATE PARK AND ALFARATA...

THIS WILL IMPACT THE FOLLOWING CENTRAL PENNSYLVANIA INTERSTATES...
I-80 BETWEEN MILE MARKERS 139 AND 177...I-99 BETWEEN MILE MARKERS 58
AND 85.

THIS WILL ALSO IMPACT THE FOLLOWING MAJOR ROADS...ROUTE 15...ROUTE
22/522...ROUTE 220...ALTERNATE ROUTE 220...ROUTE 322...ROUTE
322/22...ROUTE 522...STATE ROAD 26...STATE ROAD 45.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 4079 7819 4095 7811 4096 7808 4098 7810
      4101 7806 4102 7807 4114 7801 4097 7688
      4091 7685 4040 7715
TIME...MOT...LOC 0654Z 284DEG 38KT 4089 7785

$$

FORECASTER: CERU
4 follow-up statements
692 
WWUS51 KCTP 290714
SVSCTP

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
314 AM EDT FRI JUN 29 2012

PAC027-035-061-067-087-099-109-119-290800-
/O.CON.KCTP.SV.W.0073.000000T0000Z-120629T0800Z/
HUNTINGDON PA-JUNIATA PA-MIFFLIN PA-PERRY PA-SNYDER PA-UNION PA-
CENTRE PA-CLINTON PA-
314 AM EDT FRI JUN 29 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 400 AM EDT
FOR SOUTHEASTERN CLINTON...EASTERN CENTRE...SOUTHERN UNION...
SNYDER...NORTH CENTRAL PERRY...NORTHERN MIFFLIN...NORTHEASTERN
JUNIATA AND NORTHEASTERN HUNTINGDON COUNTIES...

AT 311 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN
EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR CENTRE HALL...OR 9
MILES SOUTHEAST OF BELLEFONTE...MOVING EAST AT 45 MPH.

LOCATIONS IN THE WARNING INCLUDE...
  POE VALLEY STATE PARK AND MILLHEIM...
  REEDS GAP STATE PARK AND ALFARATA...
  BELLTOWN AND MIFFLIN...
  SNYDER-MIDDLESWARTH STATE PARK AND MCCLURE...
  BEAVER SPRINGS AND TROXELVILLE...
  BEAVERTOWN AND THOMPSONTOWN...

THIS WILL IMPACT THE FOLLOWING CENTRAL PENNSYLVANIA INTERSTATES...
I-80 BETWEEN MILE MARKERS 155 AND 177...I-99 BETWEEN MILE MARKERS 71
AND 85.

THIS WILL ALSO IMPACT THE FOLLOWING MAJOR ROADS...ROUTE 15...ROUTE
22/522...ROUTE 220...ALTERNATE ROUTE 220...ROUTE 322...ROUTE
322/22...ROUTE 522...STATE ROAD 26...STATE ROAD 45.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DAMAGING WINDS UP TO 50 MPH IN STATE COLLAGE HAVE BEEN REPORTED WITH 
THIS STORM. THIS IS A DANGEROUS STORM... SEEK SAFE SHELTER AND STAY 
AWAY FROM WINDOWS!

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY! LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS.
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE
STRUCK BY LIGHTNING.

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 4071 7796 4110 7776 4097 7688 4091 7685
      4040 7715
TIME...MOT...LOC 0713Z 284DEG 38KT 4084 7759

$$

FORECASTER: CERU
753 
WWUS51 KCTP 290726
SVSCTP

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
326 AM EDT FRI JUN 29 2012

PAC027-035-061-067-087-099-109-119-290800-
/O.CON.KCTP.SV.W.0073.000000T0000Z-120629T0800Z/
HUNTINGDON PA-JUNIATA PA-MIFFLIN PA-PERRY PA-SNYDER PA-UNION PA-
CENTRE PA-CLINTON PA-
326 AM EDT FRI JUN 29 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 400 AM EDT
FOR SOUTHEASTERN CLINTON...SOUTHEASTERN CENTRE...SOUTHERN UNION...
SNYDER...NORTH CENTRAL PERRY...NORTHERN MIFFLIN...NORTHEASTERN
JUNIATA AND NORTHEASTERN HUNTINGDON COUNTIES...

AT 325 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN
EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR SNYDER-MIDDLESWARTH
STATE PARK...OR 18 MILES SOUTHWEST OF MIFFLINBURG...MOVING EAST AT 45
MPH.

LOCATIONS IN THE WARNING INCLUDE...
  TROXELVILLE AND BEAVER SPRINGS...
  BEAVERTOWN AND SAND BRIDGE STATE PARK...
  MIDDLEBURG AND RICHFIELD...
  FREMONT AND NEW BERLIN...
  FREEBURG AND KRATZERVILLE...

THIS WILL IMPACT I-80 BETWEEN MILE MARKERS 172 AND 177.

THIS WILL ALSO IMPACT THE FOLLOWING MAJOR ROADS...ROUTE 15...ROUTE
22/522...ROUTE 220...ROUTE 322...ROUTE 322/22...ROUTE 522...STATE
ROAD 45.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO DAMAGING WINDS...CONTINUOUS CLOUD TO GROUND LIGHTNING 
IS OCCURRING WITH THIS STORM. MOVE INDOORS IMMEDIATELY! LIGHTNING IS 
ONE OF NATURES NUMBER ONE KILLERS. REMEMBER...IF YOU CAN HEAR 
THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING.

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 4065 7780 4107 7751 4097 7688 4091 7685
      4040 7715
TIME...MOT...LOC 0726Z 282DEG 41KT 4081 7734

$$

FORECASTER: CERU
833 
WWUS51 KCTP 290738
SVSCTP

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
338 AM EDT FRI JUN 29 2012

PAC027-035-061-290747-
/O.CAN.KCTP.SV.W.0073.000000T0000Z-120629T0800Z/
HUNTINGDON PA-CENTRE PA-CLINTON PA-
338 AM EDT FRI JUN 29 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN CLINTON...
SOUTHEASTERN CENTRE AND NORTHEASTERN HUNTINGDON COUNTIES 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 4056 7749 4092 7727 4102 7718 4097 7688
      4091 7685 4040 7715
TIME...MOT...LOC 0737Z 281DEG 41KT 4077 7718

$$

PAC067-087-099-109-119-290800-
/O.CON.KCTP.SV.W.0073.000000T0000Z-120629T0800Z/
JUNIATA PA-MIFFLIN PA-PERRY PA-SNYDER PA-UNION PA-
338 AM EDT FRI JUN 29 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 400 AM EDT
FOR SOUTHERN UNION...SNYDER...NORTH CENTRAL PERRY...EAST CENTRAL
MIFFLIN AND NORTHEASTERN JUNIATA COUNTIES...

AT 334 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN
EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR TROXELVILLE...OR 13
MILES SOUTHWEST OF MIFFLINBURG...MOVING EAST AT 45 MPH.

LOCATIONS IN THE WARNING INCLUDE...
  MIDDLEBURG AND PENNS CREEK...
  FREMONT AND NEW BERLIN...
  FREEBURG AND KRATZERVILLE...

THIS WILL IMPACT THE FOLLOWING MAJOR ROADS...ROUTE 15...ROUTE
322/22...ROUTE 522...STATE ROAD 45.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO DAMAGING WINDS...CONTINUOUS CLOUD TO GROUND LIGHTNING 
IS OCCURRING WITH THIS STORM. MOVE INDOORS IMMEDIATELY! LIGHTNING IS 
ONE OF NATURES NUMBER ONE KILLERS. REMEMBER...IF YOU CAN HEAR 
THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING.

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 4056 7749 4092 7727 4102 7718 4097 7688
      4091 7685 4040 7715
TIME...MOT...LOC 0737Z 281DEG 41KT 4077 7718

$$

FORECASTER: CERU
690 
WWUS51 KCTP 290745
SVSCTP

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
345 AM EDT FRI JUN 29 2012

PAC067-087-099-109-119-290755-
/O.CAN.KCTP.SV.W.0073.000000T0000Z-120629T0800Z/
JUNIATA PA-MIFFLIN PA-PERRY PA-SNYDER PA-UNION PA-
345 AM EDT FRI JUN 29 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN UNION...SNYDER...
NORTH CENTRAL PERRY...EAST CENTRAL MIFFLIN AND NORTHEASTERN JUNIATA
COUNTIES IS CANCELLED...

THE STORM HAS WEAKENED TO BELOW SEVERE LIMITS...THEREFORE THE SEVERE
THUNDERSTORM WARNING HAS BEEN CANCELLED.

LAT...LON 4056 7749 4092 7727 4102 7718 4097 7688
      4091 7685 4040 7715
TIME...MOT...LOC 0745Z 281DEG 41KT 4075 7706

$$

FORECASTER: CERU

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 29, 12:19 AM EDTSevere Thunderstorm WarningCTPWarren41 min
Jun 29, 12:41 AM EDTSpecial Weather StatementCTPElk49 min
Jun 29, 1:02 AM EDTSevere Thunderstorm WarningCTPWarren58 min
Jun 29, 1:37 AM EDTSpecial Weather StatementCTPMcKean38 min
Jun 29, 1:46 AM EDTSpecial Weather StatementCTPElk29 min
Jun 29, 1:54 AM EDTSpecial Weather StatementCTPPotter36 min
Jun 29, 1:58 AM EDTSpecial Weather StatementCTPClearfield32 min
Jun 29, 2:24 AM EDTSpecial Weather StatementCTPCentre, Clearfield51 min
Jun 29, 2:27 AM EDTSpecial Weather StatementCTPPotter48 min
Jun 29, 2:31 AM EDTSpecial Weather StatementCTPBlair44 min
Jun 29, 3:11 AM EDTSpecial Weather StatementCTPBlair, Franklin, Huntingdon, Mifflin, Perry34 min
Jun 29, 3:14 AM EDTSpecial Weather StatementCTPSullivan, Tioga31 min
Jun 29, 3:46 AM EDTSpecial Weather StatementCTPAdams, Cumberland, Dauphin, Franklin, Lancaster, Perry and 1 more29 min
Jun 29, 3:48 AM EDTSpecial Weather StatementCTPSchuylkill27 min
Jun 29, 4:12 AM EDTSevere Thunderstorm WarningCTPDauphin, Lancaster, Lebanon, Northumberland, Schuylkill48 min
Jun 29, 4:14 AM EDTSevere Thunderstorm WarningCTPAdams, Cumberland, Franklin, York50 min
Jun 29, 4:43 AM EDTSpecial Weather StatementCTPLancaster32 min
Jun 29, 4:49 AM EDTSevere Thunderstorm WarningCTPLancaster, York16 min
Jun 29, 6:39 PM EDTSpecial Weather StatementCTPBedford66 min
Jun 29, 6:49 PM EDTSevere Thunderstorm WarningCTPBedford, Blair, Cambria, Somerset56 min
Jun 29, 7:28 PM EDTSpecial Weather StatementCTPHuntingdon62 min
Jun 29, 7:39 PM EDTSevere Thunderstorm WarningCTPBedford, Franklin, Fulton66 min
Jun 29, 7:41 PM EDTSevere Thunderstorm WarningCTPFranklin, Huntingdon49 min
Jun 29, 7:46 PM EDTFlash Flood WarningCTPBedford, Somerset3 hr
Jun 29, 7:54 PM EDTSpecial Weather StatementCTPBedford, Somerset81 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2012Every 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.