Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 48, NWS State College, PA

May 29, 20124 counties in Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at May 29, 2012, 5:48 PM EDT for 4 counties in Pennsylvania. It was in force for 72 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: May 29, 2012, 5:48 PM EDT (21:48 UTC)
Expired: May 29, 2012, 7:00 PM EDT
In force: 72 min
Issued by: NWS State College, PA
Area: Storm-based polygon

Counties Adams County, PA, Lancaster County, PA, Lebanon County, PA, York County, PA

The radar

The Sterling radar (KLWX), 140 km from the middle of the area, began a volume at 21:50 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, 6:25 PM EDT	TSTM WND DMG	Millersville, PA	LARGE TREE LIMBS DOWN.
May 29, 6:45 PM EDT	TSTM WND DMG	Millersville, PA	TREES DOWN ON THE ROAD AND ON A CAR. 1.50 INCHES OF RAIN SINCE STORM BEGAN AND STILL RAINING HARD
May 29, 6:45 PM EDT	HAIL 1	Millersville, PA	TREES DOWN ON THE ROAD AND ON A CAR. 1.50 INCHES OF RAIN SINCE STORM BEGAN AND STILL RAINING HARD

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, 9.8 hours before the alert went out and 61 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.

960 
WUUS51 KCTP 292148
SVRCTP
PAC001-071-075-133-292300-
/O.NEW.KCTP.SV.W.0048.120529T2148Z-120529T2300Z/

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

THE NATIONAL WEATHER SERVICE IN STATE COLLEGE PA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN ADAMS COUNTY IN SOUTH CENTRAL PENNSYLVANIA...
  LANCASTER COUNTY IN SOUTH CENTRAL PENNSYLVANIA...
  SOUTHEASTERN LEBANON COUNTY IN SOUTH CENTRAL PENNSYLVANIA...
  YORK COUNTY IN SOUTH CENTRAL PENNSYLVANIA...

* UNTIL 700 PM EDT

* AT 546 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS. THESE SEVERE STORMS EXTENDED FROM
  ANNVILLE TO LITTLESTOWN...MOVING EAST AT 20 MPH. THESE STORMS ARE
  CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS IN
  EXCESS OF 60 MPH. 

* LOCATIONS IN THE WARNING INCLUDE...
  SPRING GROVE...
  EMIGSVILLE...
  YORK...
  MAYTOWN AND CODORUS...
  STONYBROOK AND SPRY...
  MOUNT JOY AND MARIETTA...

THIS WILL IMPACT THE FOLLOWING CENTRAL PENNSYLVANIA INTERSTATES...THE
PENNSYLVANIA TURNPIKE BETWEEN MILE MARKERS 270 AND 295...I-83 BETWEEN
MILE MARKERS 1 AND 24.

THIS WILL ALSO IMPACT THE FOLLOWING MAJOR ROADS...STATE HIGHWAY
283...ROUTE 15...ROUTE 30...ROUTE 222...ROUTE 322...STATE ROAD 41...
STATE ROAD 94...STATE ROAD 97...STATE ROAD 501.

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 3973 7746 4008 7662 4035 7618 4014 7587
      4011 7593 4004 7593 3996 7599 3987 7598
      3972 7610 3972 7746
TIME...MOT...LOC 2147Z 254DEG 18KT 4034 7652 3970 7707

$$

FORECASTER: GARTNER/JUNG

1 follow-up statement

318 
WWUS51 KCTP 292304
SVSCTP

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
704 PM EDT TUE MAY 29 2012

PAC001-071-075-133-292314-
/O.EXP.KCTP.SV.W.0048.000000T0000Z-120529T2300Z/
ADAMS PA-LANCASTER PA-LEBANON PA-YORK PA-
704 PM EDT TUE MAY 29 2012

...THE SEVERE THUNDERSTORM WARNING FOR YORK...SOUTHEASTERN LEBANON...
LANCASTER AND SOUTHERN ADAMS COUNTIES HAS EXPIRED...

SEVERE STORMS HAVE MOVED EAST OF THE AREA...THE SEVERE THUNDERSTORM 
WARNING WAS ALLOWED TO EXPIRE.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM EDT
TUESDAY EVENING FOR SOUTH CENTRAL PENNSYLVANIA.

LAT...LON 3973 7746 4008 7662 4035 7618 4014 7587
      4011 7593 4004 7593 3996 7599 3987 7598
      3972 7610 3972 7746
TIME...MOT...LOC 2148Z 254DEG 18KT 4000 7614 3953 7664

$$

FORECASTER: LA CORTE

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, 4:30 PM EDT	Severe Thunderstorm Warning	CTP	Adams, Cumberland, Dauphin, Franklin, Perry, York	45 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

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.