Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 45, NWS State College, PA

May 29, 20126 counties in Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at May 29, 2012, 4:30 PM EDT for 6 counties in Pennsylvania. It was in force for 45 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: May 29, 2012, 4:30 PM EDT (20:30 UTC)
Expired: May 29, 2012, 5:15 PM EDT
In force: 45 min
Issued by: NWS State College, PA
Area: Storm-based polygon

Counties Adams County, PA, Cumberland County, PA, Dauphin County, PA, Franklin County, PA, Perry County, PA, York County, PA

The radar

The Sterling radar (KLWX), 113 km from the middle of the area, began a volume at 20:33 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
May 29, 5:05 PM EDT	TSTM WND DMG	2 N Mooredale, PA	NUMEROUS TREES AND WIRES DOWN
May 29, 5:05 PM EDT	TSTM WND DMG	Newville, PA	LARGE TREES DOWN

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
May 29, 1:03 PM EDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 8.5 hours before the alert went out and 109 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: 667 J/kg
Mixed-layer CIN: -217 J/kg
Mixed-layer LCL: 1153 m above ground
0-6 km bulk shear: 6 kt
0-1 km storm-relative helicity: -39 m²/s²
0-3 km storm-relative helicity: -10 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.

442 
WUUS51 KCTP 292030
SVRCTP
PAC001-041-043-055-099-133-292115-
/O.NEW.KCTP.SV.W.0045.120529T2030Z-120529T2115Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE STATE COLLEGE PA
430 PM EDT TUE MAY 29 2012

THE NATIONAL WEATHER SERVICE IN STATE COLLEGE PA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  ADAMS COUNTY IN SOUTH CENTRAL PENNSYLVANIA...
  CUMBERLAND COUNTY IN SOUTH CENTRAL PENNSYLVANIA...
  WEST CENTRAL DAUPHIN COUNTY IN SOUTH CENTRAL PENNSYLVANIA...
  SOUTHEASTERN FRANKLIN COUNTY IN SOUTH CENTRAL PENNSYLVANIA...
  SOUTHERN PERRY COUNTY IN SOUTH CENTRAL PENNSYLVANIA...
  NORTHWESTERN YORK COUNTY IN SOUTH CENTRAL PENNSYLVANIA...

* UNTIL 515 PM EDT

* AT 427 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS. THESE SEVERE STORMS EXTENDED FROM
  COLONEL DENNING STATE PARK TO NEWVILLE TO WAYNESBORO...MOVING EAST
  AT 40 MPH. THESE STORMS ARE CAPABLE OF PRODUCING QUARTER SIZE
  HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. 

* LOCATIONS IN THE WARNING INCLUDE...
  LOYSVILLE AND BLOSERVILLE...
  WALNUT BOTTOM...
  NEW BLOOMFIELD AND SHERMANSDALE...
  CASHTOWN AND CARROLL VALLEY...
  MOUNT HOLLY SPRING AND BOILING SPRINGS...
  SEVEN STARS AND DUNCANNON...

THIS WILL IMPACT THE FOLLOWING CENTRAL PENNSYLVANIA INTERSTATES...THE
PENNSYLVANIA TURNPIKE BETWEEN MILE MARKERS 207 AND 238...I-81 BETWEEN
MILE MARKERS 1 AND 66.

THIS WILL ALSO IMPACT THE FOLLOWING MAJOR ROADS...THE HARRISBURG
EXPRESSWAY...ROUTE 11...ROUTE 11/15...ROUTE 15...ROUTE 30...ROUTE
322/22...STATE ROAD 94...STATE ROAD 97.

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 900 PM EDT
TUESDAY EVENING FOR CENTRAL PENNSYLVANIA.

&&

LAT...LON 3972 7774 4013 7755 4041 7745 4046 7681
      4001 7701 3992 7696 3989 7699 3986 7695
      3983 7700 3972 7700
TIME...MOT...LOC 2030Z 256DEG 33KT 4035 7736 4014 7743
          3977 7762

$$

FORECASTER: GARTNER/CR

The office that day

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

Issued	Product	Office	Counties	Lasted
May 29, 11:38 AM EDT	Special Weather Statement	CTP	Warren	67 min
May 29, 11:47 AM EDT	Severe Thunderstorm Warning	CTP	Warren	58 min
May 29, 12:20 PM EDT	Special Weather Statement	CTP	Warren	25 min
May 29, 12:48 PM EDT	Special Weather Statement	CTP	Warren	27 min
May 29, 1:13 PM EDT	Special Weather Statement	CTP	Potter	47 min
May 29, 1:21 PM EDT	Special Weather Statement	CTP	Clinton	24 min
May 29, 1:22 PM EDT	Severe Thunderstorm Warning	CTP	Cameron, Clearfield, Elk	53 min
May 29, 1:28 PM EDT	Special Weather Statement	CTP	McKean	32 min
May 29, 1:32 PM EDT	Severe Thunderstorm Warning	CTP	Tioga	43 min
May 29, 1:36 PM EDT	Severe Thunderstorm Warning	CTP	McKean, Potter	69 min
May 29, 1:58 PM EDT	Severe Thunderstorm Warning	CTP	Blair, Huntingdon, Mifflin	62 min
May 29, 2:07 PM EDT	Severe Thunderstorm Warning	CTP	Cameron, Clinton, Elk, Potter	38 min
May 29, 2:12 PM EDT	Severe Thunderstorm Warning	CTP	Cambria, Clearfield, Elk	63 min
May 29, 2:17 PM EDT	Severe Thunderstorm Warning	CTP	Tioga	58 min
May 29, 2:29 PM EDT	Special Weather Statement	CTP	Huntingdon	31 min
May 29, 2:43 PM EDT	Severe Thunderstorm Warning	CTP	Clinton, Lycoming, Potter	62 min
May 29, 3:06 PM EDT	Severe Thunderstorm Warning	CTP	Centre, Huntingdon, Juniata, Mifflin, Perry, Snyder and 1 more	39 min
May 29, 3:09 PM EDT	Special Weather Statement	CTP	Sullivan	36 min
May 29, 3:13 PM EDT	Severe Thunderstorm Warning	CTP	Tioga	32 min
May 29, 3:16 PM EDT	Severe Thunderstorm Warning	CTP	Bedford, Blair, Centre, Clinton, Fulton, Huntingdon and 2 more	44 min
May 29, 3:19 PM EDT	Special Weather Statement	CTP	Schuylkill	41 min
May 29, 3:28 PM EDT	Special Weather Statement	CTP	Lycoming	32 min
May 29, 3:36 PM EDT	Severe Thunderstorm Warning	CTP	Columbia, Lycoming, Sullivan, Tioga	54 min
May 29, 3:43 PM EDT	Severe Thunderstorm Warning	CTP	Columbia, Dauphin, Juniata, Montour, Northumberland, Perry and 3 more	77 min
May 29, 3:55 PM EDT	Severe Thunderstorm Warning	CTP	Bedford, Centre, Clinton, Franklin, Fulton, Huntingdon and 5 more	65 min
May 29, 4:26 PM EDT	Severe Thunderstorm Warning	CTP	Columbia, Lycoming, Sullivan	34 min
May 29, 5:03 PM EDT	Severe Thunderstorm Warning	CTP	Adams, Cumberland, Dauphin, Lancaster, Lebanon, Perry and 2 more	72 min
May 29, 5:15 PM EDT	Areal Flood Advisory	CTP	Cumberland, Dauphin, Franklin, Lebanon, Schuylkill	3 hr
May 29, 5:23 PM EDT	Severe Thunderstorm Warning	CTP	Schuylkill	43 min
May 29, 5:37 PM EDT	Flash Flood Warning	CTP	Cumberland, Dauphin, Lebanon, Perry, Schuylkill	3 hr
May 29, 5:48 PM EDT	Severe Thunderstorm Warning	CTP	Adams, Lancaster, Lebanon, York	72 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.