Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 13, NWS State College, PA

April 10, 201310 counties in Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at Apr 10, 2013, 7:17 PM EDT for 10 counties in Pennsylvania. It was in force for 58 min. 3 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: Apr 10, 2013, 7:17 PM EDT (23:17 UTC)
Expired: Apr 10, 2013, 8:15 PM EDT
In force: 58 min
Issued by: NWS State College, PA
Area: Storm-based polygon

Counties Blair County, PA, Cambria County, PA, Cameron County, PA, Centre County, PA, Clearfield County, PA, Clinton County, PA, Elk County, PA, Huntingdon County, PA, Mifflin County, PA, Somerset County, PA

The radar

The State College radar (KCCX), 52 km from the middle of the area, began a volume at 23:18 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
Apr 10, 7:40 PM EDT	TSTM WND DMG	Houtzdale, PA	NUMEROUS TREES DOWN
Apr 10, 7:50 PM EDT	TSTM WND GST 64	State College, PA	SEVERAL GUSTS OVER 60 MPH OVER ABOUT A 10 MINUTE PERIOD AS THE STORM MOVED THROUGH
Apr 10, 7:53 PM EDT	TSTM WND GST 67	University Park, PA

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
Apr 10, 6:13 PM EDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Pittsburgh, PA (KPIT), launched 12:00Z, 11.3 hours before the alert went out and 138 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: 147 J/kg
Mixed-layer CIN: -81 J/kg
Mixed-layer LCL: 1105 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 190 m²/s²
0-3 km storm-relative helicity: 196 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.

738 
WUUS51 KCTP 102317
SVRCTP
PAC013-021-023-027-033-035-047-061-087-111-110015-
/O.NEW.KCTP.SV.W.0013.130410T2317Z-130411T0015Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE STATE COLLEGE PA
717 PM EDT WED APR 10 2013

THE NATIONAL WEATHER SERVICE IN STATE COLLEGE PA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  BLAIR COUNTY IN CENTRAL PENNSYLVANIA...
  CAMBRIA COUNTY IN CENTRAL PENNSYLVANIA...
  CAMERON COUNTY IN NORTH CENTRAL PENNSYLVANIA...
  CLEARFIELD COUNTY IN CENTRAL PENNSYLVANIA...
  SOUTHEASTERN ELK COUNTY IN NORTH CENTRAL PENNSYLVANIA...
  NORTHERN HUNTINGDON COUNTY IN CENTRAL PENNSYLVANIA...
  CENTRAL MIFFLIN COUNTY IN CENTRAL PENNSYLVANIA...
  NORTH CENTRAL SOMERSET COUNTY IN SOUTH CENTRAL PENNSYLVANIA...
  CENTRE COUNTY IN CENTRAL PENNSYLVANIA...
  CLINTON COUNTY IN NORTH CENTRAL PENNSYLVANIA...

* UNTIL 815 PM EDT

* AT 713 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS. THESE SEVERE STORMS EXTENDED FROM 
  TRUMAN TO JEFFRIES TO CLYMER TO APOLLO...MOVING EAST AT 60 MPH. 
  THESE STORMS ARE CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF
  60 MPH. 

* LOCATIONS IN THE WARNING INCLUDE...
  CAMERON AND HICKS RUN...
  STEVENSON DAM AND PHILIPSBURG...
  SANDY RIDGE AND PINE GLEN...
  PORT MATILDA AND MOSHANNON...
  SAINT FRANCIS UNIVERSITY AND DELGROSSO'S AMUSEMENT PARK...
  RENOVO AND PENN STATE ALTOONA...

THIS WILL IMPACT THE FOLLOWING CENTRAL PENNSYLVANIA INTERSTATES...
I-80 BETWEEN MILE MARKERS 110 AND 179...I-99 BETWEEN MILE MARKERS 21
AND 85.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS LINE OF SEVERE THUNDERSTORMS HAS A HISTORY OF PRODUCING WIND 
DAMAGE OVER MUCH OF WESTERN PENNSYLVANIA.

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 IN STATE COLLEGE THROUGH TWITTER OR FACEBOOK.

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

&&

LAT...LON 4038 7899 4072 7881 4088 7881 4096 7859
      4160 7841 4118 7735 4070 7760 4044 7801
      4030 7856 4033 7862 4028 7866 4022 7910
TIME...MOT...LOC 2315Z 291DEG 54KT 4147 7829 4092 7843
          4068 7900 4055 7954

$$

FORECASTER: DEVOIR

1 follow-up statement

408 
WWUS51 KCTP 110011
SVSCTP

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
811 PM EDT WED APR 10 2013

PAC013-021-023-027-033-035-047-061-087-111-110020-
/O.EXP.KCTP.SV.W.0013.000000T0000Z-130411T0015Z/
BLAIR PA-CAMBRIA PA-CAMERON PA-CLEARFIELD PA-ELK PA-HUNTINGDON PA-
MIFFLIN PA-SOMERSET PA-CENTRE PA-CLINTON PA-
811 PM EDT WED APR 10 2013

...THE SEVERE THUNDERSTORM WARNING FOR CLINTON...CENTRE...SOMERSET...
MIFFLIN...HUNTINGDON...ELK...CLEARFIELD...CAMERON...CAMBRIA AND BLAIR
COUNTIES WILL EXPIRE AT 815 PM EDT...

THE SEVERE THUNDERSTORM WARNING WILL BE ALLOWED TO EXPIRE AS THE 
STORMS EXIT THE WARNING AREA. 

PLEASE REPORT HAIL...STRONG WINDS OR WIND DAMAGE TO THE NATIONAL 
WEATHER SERVICE IN STATE COLLEGE THROUGH TWITTER OR FACEBOOK.

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

LAT...LON 4038 7899 4072 7881 4088 7881 4096 7859
      4160 7841 4118 7735 4070 7760 4044 7801
      4030 7856 4033 7862 4028 7866 4022 7910
TIME...MOT...LOC 0010Z 291DEG 54KT 4117 7727 4062 7742
          4038 7799 4026 7853

$$

FORECASTER: LA CORTE

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 10, 2:17 PM EDT	Severe Thunderstorm Warning	CTP	Cameron, Clearfield, Elk	58 min
Apr 10, 2:36 PM EDT	Severe Thunderstorm Warning	CTP	McKean, Potter	39 min
Apr 10, 3:07 PM EDT	Severe Thunderstorm Warning	CTP	Cameron, Centre, Clearfield, Clinton, Elk, Potter	53 min
Apr 10, 3:41 PM EDT	Special Weather Statement	CTP	Clinton, Lycoming	34 min
Apr 10, 4:02 PM EDT	Severe Thunderstorm Warning	CTP	Clinton, Lycoming, Montour, Northumberland, Sullivan, Union	58 min
Apr 10, 4:11 PM EDT	Special Weather Statement	CTP	Cambria	49 min
Apr 10, 4:29 PM EDT	Severe Thunderstorm Warning	CTP	Bedford, Blair, Cambria, Somerset	61 min
Apr 10, 4:33 PM EDT	Special Weather Statement	CTP	Centre	27 min
Apr 10, 4:38 PM EDT	Severe Thunderstorm Warning	CTP	Columbia, Lycoming, Montour, Northumberland, Sullivan, Union	52 min
Apr 10, 4:57 PM EDT	Special Weather Statement	CTP	Juniata, Mifflin, Perry	48 min
Apr 10, 5:10 PM EDT	Severe Thunderstorm Warning	CTP	Juniata, Mifflin, Snyder	65 min
Apr 10, 6:02 PM EDT	Severe Thunderstorm Warning	CTP	Cameron, Clinton, Elk, Lycoming, McKean, Potter and 1 more	58 min
Apr 10, 6:32 PM EDT	Special Weather Statement	CTP	Dauphin, Lebanon	43 min
Apr 10, 6:44 PM EDT	Severe Thunderstorm Warning	CTP	Cameron, Centre, Clearfield, Clinton, Elk	61 min
Apr 10, 7:05 PM EDT	Severe Thunderstorm Warning	CTP	Clinton, Columbia, Lycoming, Sullivan, Tioga	55 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2013 Every severe thunderstorm warning in 2013

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.