Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 79, NWS State College, PA

June 29, 2012Franklin County, Huntingdon County, Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at Jun 29, 2012, 7:41 PM EDT for Franklin County, Huntingdon County, Pennsylvania. It was in force for 49 min. 1 report 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, 7:41 PM EDT (23:41 UTC)
Expired: Jun 29, 2012, 8:30 PM EDT
In force: 49 min
Issued by: NWS State College, PA
Area: Storm-based polygon

Counties Franklin County, PA, Huntingdon County, PA

The radar

The State College radar (KCCX), 84 km from the middle of the area, began a volume at 23:43 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
Jun 29, 7:57 PM EDT	TSTM WND DMG	3 Nne Shade Gap, PA	TREES REPROTED DOWN ACROSS ROAD IN TELL TOWNSHIP.

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

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jun 29, 6:34 PM EDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 11.7 hours before the alert went out and 142 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: 1842 J/kg
Mixed-layer CIN: -232 J/kg
Mixed-layer LCL: 1603 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 29 m²/s²
0-3 km storm-relative helicity: 39 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.1

Open this sounding in Storm Lab

The text

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

921 
WUUS51 KCTP 292341
SVRCTP
PAC055-061-300030-
/O.NEW.KCTP.SV.W.0079.120629T2341Z-120630T0030Z/

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

THE NATIONAL WEATHER SERVICE IN STATE COLLEGE PA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTH CENTRAL FRANKLIN COUNTY IN SOUTH CENTRAL PENNSYLVANIA...
  SOUTHERN HUNTINGDON COUNTY IN CENTRAL PENNSYLVANIA...

* UNTIL 830 PM EDT

* AT 738 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM. THE STORM WAS NEAR BROAD TOP CITY...MOVING
  EAST AT 30 MPH. THIS STORM IS CAPABLE OF PRODUCING QUARTER SIZE
  HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. 

* LOCATIONS IN THE WARNING INCLUDE...
  WILLOW HILL...
  DOYLESBURG AND AMBERSON VALLEY...

THIS WILL IMPACT THE PENNSYLVANIA TURNPIKE BETWEEN MILE MARKERS 185
AND 197.

THIS WILL ALSO IMPACT ROUTE 522.

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.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 100 AM EDT
SATURDAY MORNING FOR SOUTH CENTRAL PENNSYLVANIA.

&&

LAT...LON 4007 7789 4010 7792 4012 7802 4019 7815
      4025 7817 4030 7772 4026 7770 4028 7767
      4006 7768
TIME...MOT...LOC 2341Z 271DEG 25KT 4021 7806

$$

FORECASTER: EVANEGO

1 follow-up statement

548 
WWUS51 KCTP 300001
SVSCTP

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
801 PM EDT FRI JUN 29 2012

PAC055-061-300030-
/O.CON.KCTP.SV.W.0079.000000T0000Z-120630T0030Z/
FRANKLIN PA-HUNTINGDON PA-
801 PM EDT FRI JUN 29 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 830 PM EDT
FOR SOUTHEASTERN HUNTINGDON AND NORTH CENTRAL FRANKLIN COUNTIES...

AT 757 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED
NEAR ORBISONIA...OR 21 MILES SOUTH OF HUNTINGDON...MOVING EAST AT 30
MPH.

LOCATIONS IN THE WARNING INCLUDE...
  DOYLESBURG AND AMBERSON VALLEY...

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 100 AM EDT
SATURDAY MORNING FOR SOUTH CENTRAL PENNSYLVANIA.

&&

LAT...LON 4015 7792 4028 7793 4030 7772 4026 7770
      4028 7767 4011 7768
TIME...MOT...LOC 0001Z 271DEG 25KT 4021 7788

$$

FORECASTER: EVANEGO

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 29, 12:19 AM EDT	Severe Thunderstorm Warning	CTP	Warren	41 min
Jun 29, 12:41 AM EDT	Special Weather Statement	CTP	Elk	49 min
Jun 29, 1:02 AM EDT	Severe Thunderstorm Warning	CTP	Warren	58 min
Jun 29, 1:37 AM EDT	Special Weather Statement	CTP	McKean	38 min
Jun 29, 1:46 AM EDT	Special Weather Statement	CTP	Elk	29 min
Jun 29, 1:54 AM EDT	Special Weather Statement	CTP	Potter	36 min
Jun 29, 1:58 AM EDT	Special Weather Statement	CTP	Clearfield	32 min
Jun 29, 2:24 AM EDT	Special Weather Statement	CTP	Centre, Clearfield	51 min
Jun 29, 2:27 AM EDT	Special Weather Statement	CTP	Potter	48 min
Jun 29, 2:31 AM EDT	Special Weather Statement	CTP	Blair	44 min
Jun 29, 2:54 AM EDT	Severe Thunderstorm Warning	CTP	Centre, Clinton, Huntingdon, Juniata, Mifflin, Perry and 2 more	51 min
Jun 29, 3:11 AM EDT	Special Weather Statement	CTP	Blair, Franklin, Huntingdon, Mifflin, Perry	34 min
Jun 29, 3:14 AM EDT	Special Weather Statement	CTP	Sullivan, Tioga	31 min
Jun 29, 3:46 AM EDT	Special Weather Statement	CTP	Adams, Cumberland, Dauphin, Franklin, Lancaster, Perry and 1 more	29 min
Jun 29, 3:48 AM EDT	Special Weather Statement	CTP	Schuylkill	27 min
Jun 29, 4:12 AM EDT	Severe Thunderstorm Warning	CTP	Dauphin, Lancaster, Lebanon, Northumberland, Schuylkill	48 min
Jun 29, 4:14 AM EDT	Severe Thunderstorm Warning	CTP	Adams, Cumberland, Franklin, York	50 min
Jun 29, 4:43 AM EDT	Special Weather Statement	CTP	Lancaster	32 min
Jun 29, 4:49 AM EDT	Severe Thunderstorm Warning	CTP	Lancaster, York	16 min
Jun 29, 6:39 PM EDT	Special Weather Statement	CTP	Bedford	66 min
Jun 29, 6:49 PM EDT	Severe Thunderstorm Warning	CTP	Bedford, Blair, Cambria, Somerset	56 min
Jun 29, 7:28 PM EDT	Special Weather Statement	CTP	Huntingdon	62 min
Jun 29, 7:39 PM EDT	Severe Thunderstorm Warning	CTP	Bedford, Franklin, Fulton	66 min
Jun 29, 7:46 PM EDT	Flash Flood Warning	CTP	Bedford, Somerset	3 hr
Jun 29, 7:54 PM EDT	Special Weather Statement	CTP	Bedford, Somerset	81 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.