Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 69, NWS State College, PA

June 22, 2012Columbia County, Montour County, Northumberland County, Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at Jun 22, 2012, 2:04 PM EDT for Columbia County, Montour County, Northumberland County, Pennsylvania. It was in force for 56 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 22, 2012, 2:04 PM EDT (18:04 UTC)
Expired: Jun 22, 2012, 3:00 PM EDT
In force: 56 min
Issued by: NWS State College, PA
Area: Storm-based polygon

Counties Columbia County, PA, Montour County, PA, Northumberland County, PA

The radar

The State College radar (KCCX), 136 km from the middle of the area, began a volume at 18:06 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 22, 2:10 PM EDT	TSTM WND DMG	Danville, PA	SIDING OFF HOUSES... STRONG WIND GUSTS... BRANCHES 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
Jun 22, 1:41 PM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 6.1 hours before the alert went out and 172 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: 1129 J/kg
Mixed-layer CIN: -93 J/kg
Mixed-layer LCL: 1361 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: -2 m²/s²
0-3 km storm-relative helicity: 53 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.6

Open this sounding in Storm Lab

The text

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

200 
WUUS51 KCTP 221804
SVRCTP
PAC037-093-097-221900-
/O.NEW.KCTP.SV.W.0069.120622T1804Z-120622T1900Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE STATE COLLEGE PA
204 PM EDT FRI JUN 22 2012

THE NATIONAL WEATHER SERVICE IN STATE COLLEGE PA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL COLUMBIA COUNTY IN CENTRAL PENNSYLVANIA...
  MONTOUR COUNTY IN CENTRAL PENNSYLVANIA...
  CENTRAL NORTHUMBERLAND COUNTY IN CENTRAL PENNSYLVANIA...

* UNTIL 300 PM EDT

* AT 158 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM. THE STORM WAS NEAR MECHANICSVILLE...MOVING
  EAST AT 35 MPH. THIS STORM IS CAPABLE OF PRODUCING ONE INCH   
  DIAMETER HAIL...AND DAMAGING DOWNBURST WIND GUSTS IN EXCESS OF 60
  MPH. 

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  BLOOMSBURG AND CATAWISSA AROUND 210 PM EDT...
  ALMEDIA AND MAINVILLE AROUND 220 PM EDT...
  MIFFLINVILLE AROUND 225 PM EDT...
  BERWICK AND SHUMANS AROUND 230 PM EDT...
  SCOTCH VALLEY AROUND 235 PM EDT...

THIS WILL IMPACT I-80 BETWEEN MILE MARKERS 218 AND 247.

THIS WILL ALSO IMPACT ROUTE 11.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS CREATE WINDS OF MORE THAN 57 MPH...OR HAIL ONE
INCH OR LARGER.

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.

&&

LAT...LON 4089 7628 4091 7672 4102 7676 4111 7673
      4114 7623 4114 7622 4103 7622 4098 7620
      4095 7621
TIME...MOT...LOC 1804Z 267DEG 29KT 4102 7654

$$

FORECASTER: LAMBERT/DEVOIR

1 follow-up statement

865 
WWUS51 KCTP 221837
SVSCTP

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
237 PM EDT FRI JUN 22 2012

PAC093-097-221843-
/O.CAN.KCTP.SV.W.0069.000000T0000Z-120622T1900Z/
MONTOUR PA-NORTHUMBERLAND PA-
237 PM EDT FRI JUN 22 2012

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL NORTHUMBERLAND AND
MONTOUR COUNTIES 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 4094 7622 4089 7628 4090 7653 4094 7653
      4096 7650 4102 7646 4112 7642 4114 7622
      4104 7622 4098 7620
TIME...MOT...LOC 1833Z 267DEG 29KT 4103 7623

$$

PAC037-221900-
/O.CON.KCTP.SV.W.0069.000000T0000Z-120622T1900Z/
COLUMBIA PA-
237 PM EDT FRI JUN 22 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 300 PM EDT
FOR SOUTHERN COLUMBIA COUNTY...

AT 232 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN
EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR BERWICK...MOVING EAST
AT 35 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
ORANGEVILLE

THIS WILL IMPACT I-80 BETWEEN MILE MARKERS 234 AND 247.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DAMAGING WIND GUSTS FROM THIS STORM TORE SIDING OFF A HOME AND 
DOWNED LARGE TREE BRANCHES IN DANVILLE AROUND 210 PM. THIS IS A 
DANGEROUS STORM... SEEK SAFE SHELTER AND STAY AWAY FROM WINDOWS!

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 4094 7622 4089 7628 4090 7653 4094 7653
      4096 7650 4102 7646 4112 7642 4114 7622
      4104 7622 4098 7620
TIME...MOT...LOC 1833Z 267DEG 29KT 4103 7623

$$

FORECASTER: LAMBERT

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 21, 10:21 PM EDT	Special Weather Statement	CTP	Bedford	39 min
Jun 22, 12:43 PM EDT	Special Weather Statement	CTP	Union	62 min
Jun 22, 1:16 PM EDT	Special Weather Statement	CTP	Montour, Sullivan, Union	59 min
Jun 22, 1:59 PM EDT	Special Weather Statement	CTP	York	46 min
Jun 22, 2:34 PM EDT	Special Weather Statement	CTP	Northumberland, Snyder	56 min
Jun 22, 4:08 PM EDT	Special Weather Statement	CTP	York	37 min
Jun 22, 4:24 PM EDT	Areal Flood Advisory	CTP	Adams, York	111 min
Jun 22, 4:28 PM EDT	Special Weather Statement	CTP	Lancaster	32 min
Jun 22, 4:33 PM EDT	Severe Thunderstorm Warning	CTP	York	57 min
Jun 22, 5:03 PM EDT	Special Weather Statement	CTP	Lancaster	42 min
Jun 22, 5:05 PM EDT	Special Weather Statement	CTP	Lancaster	40 min
Jun 22, 7:59 PM EDT	Special Weather Statement	CTP	York	31 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.