Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 113, NWS State College, PA

July 18, 20124 counties in Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at Jul 18, 2012, 12:45 PM EDT for 4 counties in Pennsylvania. It was in force for 60 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 18, 2012, 12:45 PM EDT (16:45 UTC)
Expired: Jul 18, 2012, 1:45 PM EDT
In force: 60 min
Issued by: NWS State College, PA
Area: Storm-based polygon

Counties Cumberland County, PA, Juniata County, PA, Mifflin County, PA, Perry County, PA

The radar

The State College radar (KCCX), 55 km from the middle of the area, began a volume at 16:47 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.

The watch it was issued in

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

Issued	Product	Office	Lasted
Jul 18, 12:41 PM EDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 4.8 hours before the alert went out and 174 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: 1864 J/kg
Mixed-layer CIN: -91 J/kg
Mixed-layer LCL: 1438 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 38 m²/s²
0-3 km storm-relative helicity: 13 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.

765 
WUUS51 KCTP 181645
SVRCTP
PAC041-067-087-099-181745-
/O.NEW.KCTP.SV.W.0113.120718T1645Z-120718T1745Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE STATE COLLEGE PA
1245 PM EDT WED JUL 18 2012

THE NATIONAL WEATHER SERVICE IN STATE COLLEGE PA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTH CENTRAL CUMBERLAND COUNTY IN SOUTH CENTRAL PENNSYLVANIA...
  JUNIATA COUNTY IN CENTRAL PENNSYLVANIA...
  CENTRAL MIFFLIN COUNTY IN CENTRAL PENNSYLVANIA...
  WESTERN PERRY COUNTY IN SOUTH CENTRAL PENNSYLVANIA...

* UNTIL 145 PM EDT

* AT 1243 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM. THE STORM WAS NEAR STRODES MILLS...MOVING
  SOUTHEAST AT 20 MPH. THIS STORM IS CAPABLE OF PRODUCING QUARTER
  SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. 

* LOCATIONS IN THE WARNING INCLUDE...
  STRODES MILLS...
  LEWISTOWN AND BLACKLOG...
  HONEY GROVE AND WALNUT...
  SPRUCE HILL...
  LOYSVILLE AND ICKESBURG...

THIS WILL IMPACT THE PENNSYLVANIA TURNPIKE BETWEEN MILE MARKERS 213
AND 214.

THIS WILL ALSO IMPACT THE FOLLOWING MAJOR ROADS...ROUTE 22/522...
ROUTE 322...ROUTE 322/22...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.

&&

LAT...LON 4049 7783 4051 7782 4055 7784 4061 7779
      4066 7771 4053 7713 4017 7739
TIME...MOT...LOC 1645Z 300DEG 17KT 4054 7771

$$

FORECASTER: RHG/MD

1 follow-up statement

304 
WWUS51 KCTP 181731
SVSCTP

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
131 PM EDT WED JUL 18 2012

PAC041-067-087-099-181745-
/O.CON.KCTP.SV.W.0113.000000T0000Z-120718T1745Z/
CUMBERLAND PA-JUNIATA PA-MIFFLIN PA-PERRY PA-
131 PM EDT WED JUL 18 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 145 PM EDT
FOR WESTERN PERRY...CENTRAL MIFFLIN...JUNIATA AND NORTH CENTRAL
CUMBERLAND COUNTIES...

AT 127 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 SPRUCE HILL...OR 12 MILES SOUTHEAST OF LEWISTOWN...MOVING
SOUTHEAST AT 20 MPH.

LOCATIONS IN THE WARNING INCLUDE...
  KISTLER...
  LOYSVILLE AND LANDISBURG...

THIS WILL IMPACT ROUTE 322/22.

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.

&&

LAT...LON 4044 7775 4061 7751 4053 7713 4017 7739
TIME...MOT...LOC 1731Z 300DEG 17KT 4043 7746

$$

FORECASTER: GRUMM

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 18, 12:29 PM EDT	Special Weather Statement	CTP	Mifflin	31 min
Jul 18, 12:32 PM EDT	Special Weather Statement	CTP	Somerset	28 min
Jul 18, 1:01 PM EDT	Special Weather Statement	CTP	Union	44 min
Jul 18, 1:09 PM EDT	Severe Thunderstorm Warning	CTP	Northumberland, Schuylkill	66 min
Jul 18, 1:12 PM EDT	Severe Thunderstorm Warning	CTP	Bedford, Blair, Fulton, Huntingdon	63 min
Jul 18, 1:15 PM EDT	Severe Thunderstorm Warning	CTP	Bedford, Somerset	75 min
Jul 18, 1:20 PM EDT	Severe Thunderstorm Warning	CTP	Centre, Clinton, Lycoming, Northumberland, Snyder, Union	70 min
Jul 18, 1:24 PM EDT	Areal Flood Advisory	CTP	Bedford, Blair, Cambria, Huntingdon, Somerset	3 hr
Jul 18, 1:27 PM EDT	Special Weather Statement	CTP	Huntingdon	48 min
Jul 18, 1:35 PM EDT	Severe Thunderstorm Warning	CTP	Cumberland, Dauphin, Perry, York	70 min
Jul 18, 1:40 PM EDT	Severe Thunderstorm Warning	CTP	Dauphin, Lancaster, Lebanon	80 min
Jul 18, 2:16 PM EDT	Severe Thunderstorm Warning	CTP	Adams, Cumberland, York	74 min
Jul 18, 2:18 PM EDT	Severe Thunderstorm Warning	CTP	Adams, Cumberland, Franklin	72 min
Jul 18, 2:29 PM EDT	Special Weather Statement	CTP	Sullivan	31 min
Jul 18, 2:37 PM EDT	Severe Thunderstorm Warning	CTP	Adams, Cumberland, Dauphin, Lancaster, Lebanon, York	83 min
Jul 18, 2:39 PM EDT	Special Weather Statement	CTP	Sullivan	36 min
Jul 18, 2:56 PM EDT	Special Weather Statement	CTP	Bedford, Somerset	79 min
Jul 18, 3:18 PM EDT	Severe Thunderstorm Warning	CTP	Adams, Lancaster, York	57 min
Jul 18, 3:22 PM EDT	Severe Thunderstorm Warning	CTP	Bedford, Cambria, Somerset	53 min
Jul 18, 3:40 PM EDT	Severe Thunderstorm Warning	CTP	Centre, Clinton, Snyder, Union	51 min
Jul 18, 4:19 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster, York	56 min
Jul 18, 4:28 PM EDT	Special Weather Statement	CTP	Bedford	32 min
Jul 18, 4:29 PM EDT	Special Weather Statement	CTP	Juniata	31 min
Jul 18, 5:06 PM EDT	Special Weather Statement	CTP	Juniata, Mifflin, Perry	54 min
Jul 18, 5:28 PM EDT	Special Weather Statement	CTP	Lycoming	62 min
Jul 18, 7:26 PM EDT	Special Weather Statement	CTP	Union	64 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.