Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 1, NWS State College, PA

January 17, 2012Warren County, Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at Jan 17, 2012, 6:07 PM EST for Warren County, Pennsylvania. It was in force for 53 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: Jan 17, 2012, 6:07 PM EST (23:07 UTC)
Expired: Jan 17, 2012, 7:00 PM EST
In force: 53 min
Issued by: NWS State College, PA
Area: Storm-based polygon

County Warren County, PA

The radar

The Buffalo radar (KBUF), 130 km from the middle of the area, began a volume at 23:09 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
Jan 17, 6:20 PM EST	TSTM WND DMG	Columbus, PA	NUMEROUS TREES DOWN
Jan 17, 6:45 PM EST	TSTM WND DMG	Chapman State Park, PA	TREES DOWN
Jan 17, 6:45 PM EST	TSTM WND DMG	North Warren, PA	TREE DOWN

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 11.1 hours before the alert went out and 129 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 479 m above ground
0-6 km bulk shear: 64 kt
0-1 km storm-relative helicity: 218 m²/s²
0-3 km storm-relative helicity: 321 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.

515 
WUUS51 KCTP 172307
SVRCTP
PAC123-180000-
/O.NEW.KCTP.SV.W.0001.120117T2307Z-120118T0000Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE STATE COLLEGE PA
607 PM EST TUE JAN 17 2012

THE NATIONAL WEATHER SERVICE IN STATE COLLEGE PA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WARREN COUNTY IN NORTH CENTRAL PENNSYLVANIA...

* UNTIL 700 PM EST

* AT 604 PM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS. THESE SEVERE STORMS EXTENDED FROM   
  JAMESTOWN TO HYDETOWN...MOVING NORTHEAST AT 50 MPH. THESE STORMS   
  ARE CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. 

* LOCATIONS IN THE WARNING INCLUDE...
  LOTTSVILLE...
  GRAND VALLEY...
  ENTERPRISE AND GARLAND...
  YOUNGSVILLE...
  RUSSELL...
  WARREN AND SCANDIA...

THIS WILL IMPACT THE FOLLOWING MAJOR ROADS...ROUTE 6...ROUTE 62...
STATE ROAD 59.

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.

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 4200 7892 4184 7891 4183 7892 4183 7895
      4162 7896 4162 7952 4163 7962 4193 7962
      4200 7960
TIME...MOT...LOC 2306Z 269DEG 20KT 4209 7933 4160 7984

$$

FORECASTER: MARTIN

The office that day

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

Issued	Product	Office	Counties	Lasted
Jan 17, 4:10 AM EST	Wind Advisory	CTP	Cambria, Cameron, Clearfield, Elk, McKean, Potter and 2 more	24 hr
Jan 17, 2:17 PM EST	Lake Effect Snow Advisory	CTP	Warren	24 hr
Jan 17, 5:35 PM EST	Special Weather Statement	CTP	Warren	85 min
Jan 17, 6:43 PM EST	Severe Thunderstorm Warning	CTP	Cameron, Elk, McKean, Potter, Warren	92 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.