Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 68, NWS State College, PA

June 12, 20124 counties in Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at Jun 12, 2012, 6:58 PM EDT for 4 counties in Pennsylvania. It was in force for 62 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
Jun 12, 2012, 6:58 PM EDT (22:58 UTC)
Expired
Jun 12, 2012, 8:00 PM EDT
In force
62 min
Issued by
NWS State College, PA
Area
Storm-based polygon

Counties Huntingdon County, PA, Juniata County, PA, Mifflin County, PA, Perry County, PA

The radar

The State College radar (KCCX), 47 km from the middle of the area, began a volume at 22:59 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 nearest sounding before it

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 11.0 hours before the alert went out and 182 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, Phillips Aaf/Abe, MD at 12:00Z on 2012-06-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 21 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Phillips Aaf/Abe, MD at 12:00Z on 2012-06-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 17 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
21 J/kg
Mixed-layer CIN
-1 J/kg
Mixed-layer LCL
470 m above ground
0-6 km bulk shear
21 kt
0-1 km storm-relative helicity
17 m²/s²
0-3 km storm-relative helicity
67 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.

715 
WUUS51 KCTP 122258
SVRCTP
PAC061-067-087-099-130000-
/O.NEW.KCTP.SV.W.0068.120612T2258Z-120613T0000Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE STATE COLLEGE PA
658 PM EDT TUE JUN 12 2012

THE NATIONAL WEATHER SERVICE IN STATE COLLEGE PA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN HUNTINGDON COUNTY IN CENTRAL PENNSYLVANIA...
  JUNIATA COUNTY IN CENTRAL PENNSYLVANIA...
  MIFFLIN COUNTY IN CENTRAL PENNSYLVANIA...
  CENTRAL PERRY COUNTY IN SOUTH CENTRAL PENNSYLVANIA...

* UNTIL 800 PM EDT

* AT 655 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS. THESE SEVERE STORMS EXTENDED FROM
  POTTERS MILLS TO BELLEVILLE TO MCALEVYS FORT TO HUNTINGDON...MOVING
  SOUTHEAST AT 30 MPH. THESE STORMS ARE CAPABLE OF PRODUCING DAMAGING
  WINDS IN EXCESS OF 60 MPH. 

* SEVERE THUNDERSTORMS WILL BE NEAR...
  SEVEN MOUNTAINS AND ALLENSVILLE AROUND 705 PM EDT...
  MILROY AND YEAGERTOWN AROUND 710 PM EDT...
  STRODES MILLS AND LEWISTOWN AROUND 715 PM EDT...
  ALFARATA AROUND 720 PM EDT...
  WALNUT AND BLACKLOG AROUND 730 PM EDT...
  SPRUCE HILL AROUND 735 PM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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 4055 7811 4063 7790 4073 7778 4073 7772
      4072 7771 4076 7761 4061 7718 4045 7725
      4036 7738 4032 7764
TIME...MOT...LOC 2258Z 300DEG 25KT 4074 7767 4065 7771
          4058 7780 4053 7795

$$

FORECASTER: LAMBERT
1 follow-up statement
634 
WWUS51 KCTP 122345
SVSCTP

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
745 PM EDT TUE JUN 12 2012

PAC061-122353-
/O.CAN.KCTP.SV.W.0068.000000T0000Z-120613T0000Z/
HUNTINGDON PA-
745 PM EDT TUE JUN 12 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN HUNTINGDON 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 4041 7782 4049 7759 4056 7748 4069 7742
      4061 7718 4045 7725 4036 7738 4032 7764
TIME...MOT...LOC 2343Z 300DEG 25KT 4058 7731 4049 7736
          4042 7745 4037 7760

$$

PAC067-087-099-130000-
/O.CON.KCTP.SV.W.0068.000000T0000Z-120613T0000Z/
JUNIATA PA-MIFFLIN PA-PERRY PA-
745 PM EDT TUE JUN 12 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 800 PM EDT
FOR CENTRAL PERRY...SOUTH CENTRAL MIFFLIN AND JUNIATA COUNTIES...

AT 742 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING
WINDS IN EXCESS OF 60 MPH. THESE STORMS WERE LOCATED ALONG A LINE
EXTENDING FROM MCALISTERVILLE TO PORT ROYAL TO SPRUCE HILL TO
PERULACK...MOVING SOUTHEAST AT 30 MPH.

SEVERE THUNDERSTORMS WILL BE NEAR...
THOMPSONTOWN AND KISTLER AROUND 750 PM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU ARE IN THE PATH OF THIS STORM...PREPARE FOR DAMAGING WINDS...
DESTRUCTIVE HAIL...AND DEADLY CLOUD TO GROUND LIGHTNING. PEOPLE
OUTSIDE SHOULD MOVE TO A SHELTER...PREFERABLY INSIDE A STRONG
BUILDING...AWAY FROM WINDOWS OR EVEN BELOW GROUND LEVEL.

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 4041 7782 4049 7759 4056 7748 4069 7742
      4061 7718 4045 7725 4036 7738 4032 7764
TIME...MOT...LOC 2343Z 300DEG 25KT 4058 7731 4049 7736
          4042 7745 4037 7760

$$

FORECASTER: LAMBERT

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 12, 2:44 PM EDTSpecial Weather StatementCTPWarren61 min
Jun 12, 3:23 PM EDTSpecial Weather StatementCTPMcKean37 min
Jun 12, 4:32 PM EDTSpecial Weather StatementCTPCameron, Elk58 min
Jun 12, 4:46 PM EDTSpecial Weather StatementCTPClearfield59 min
Jun 12, 5:42 PM EDTSpecial Weather StatementCTPBlair, Cambria, Centre, Clearfield, Clinton63 min
Jun 12, 6:34 PM EDTSpecial Weather StatementCTPBedford, Blair, Cambria, Centre, Clinton, Huntingdon and 3 more71 min
Jun 12, 7:16 PM EDTAreal Flood AdvisoryCTPBedford, Blair, Cambria, Somerset119 min
Jun 12, 7:40 PM EDTSpecial Weather StatementCTPBedford, Cumberland, Dauphin, Franklin, Fulton, Juniata and 1 more80 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.