Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 113, NWS State College, PA

October 2, 20186 counties in Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at Oct 2, 2018, 5:27 PM EDT for 6 counties in Pennsylvania. It was in force for 93 min. 5 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: Oct 2, 2018, 5:27 PM EDT (21:27 UTC)
Expired: Oct 2, 2018, 7:00 PM EDT
In force: 93 min
Issued by: NWS State College, PA
Area: Storm-based polygon
Hail: 1.5 in
Wind: 60.0 mph

Counties Cameron County, PA, Centre County, PA, Clearfield County, PA, Clinton County, PA, Elk County, PA, Potter County, PA

The radar

The State College radar (KCCX), 60 km from the middle of the area, began a volume at 21:26 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
Oct 2, 5:31 PM EDT	TSTM WND DMG	Falls Creek, PA	MULTIPLE TREES DOWN
Oct 2, 5:45 PM EDT	TSTM WND DMG	3 E Dubois, PA	TREES DOWN ALONG SHER DE LIN ROAD NEAR I-80.
Oct 2, 5:51 PM EDT	HAIL 0.75	Rockton, PA	DIME-SIZED HAIL NEAR ROCKTON MOUNTAIN.
Oct 2, 6:00 PM EDT	HAIL 1.75	Falls Creek, PA	GOLF BALL SIZED HAIL REPORTED AT 3RD ST. AND OSBORNE.
Oct 2, 6:05 PM EDT	HAIL 0.75	1 E Dubois, PA

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
Oct 2, 2:55 PM EDT	Tornado Watch	SPC	8 hr

The nearest sounding before it

Pittsburgh, PA (KAGC), launched 12:00Z, 9.5 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: 779 J/kg
Mixed-layer CIN: -35 J/kg
Mixed-layer LCL: 821 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 120 m²/s²
0-3 km storm-relative helicity: 133 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 2.7

Open this sounding in Storm Lab

The text

As transmitted.

713 
WUUS51 KCTP 022127
SVRCTP
PAC023-027-033-035-047-105-022300-
/O.NEW.KCTP.SV.W.0113.181002T2127Z-181002T2300Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service State College PA
527 PM EDT TUE OCT 2 2018

The National Weather Service in State College PA has issued a

* Severe Thunderstorm Warning for...
  Elk County in north central Pennsylvania...
  Clearfield County in central Pennsylvania...
  Northwestern Centre County in central Pennsylvania...
  Southern Potter County in north central Pennsylvania...
  Cameron County in north central Pennsylvania...
  Northwestern Clinton County in north central Pennsylvania...

* Until 700 PM EDT.

* At 526 PM EDT, severe thunderstorms were located along a line
  extending from 6 miles northeast of East Branch Dam to 6 miles
  north of Portland Mills to Reynoldsville, moving east at 45 mph.

  HAZARD...Ping pong ball size hail and 60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...People and animals outdoors will be injured. Expect hail 
           damage to roofs, siding, windows, and vehicles. Expect 
           wind damage to roofs, siding, and trees.

* Locations impacted include...
  St. Marys, DuBois, Clearfield, Ridgway, Johnsonburg, Sandy,
  Cameron, Wharton, Keating, Woodland, Curwensville, Emporium,
  Penfield, Hyde, Renovo, Plymptonville, Rockton, Karthaus, Clarence
  and South Renovo.

For those driving on Interstate 80, this includes areas between the
Dubois and Snow Shoe exits, specifically from mile markers 97 to 142.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

These storms are producing destructive winds and large damaging hail.
SEEK SHELTER NOW inside a sturdy structure and stay away from
windows!
 
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

A Tornado Watch remains in effect until 1100 PM EDT for central and
north central Pennsylvania.

LAT...LON 4162 7850 4160 7848 4160 7817 4154 7763
      4143 7758 4127 7776 4091 7809 4096 7881
      4114 7880 4120 7877 4120 7871 4123 7871
      4123 7874 4126 7874 4136 7894 4162 7895
TIME...MOT...LOC 2126Z 286DEG 37KT 4160 7849 4147 7886 4112 7889 

HAIL...1.50IN
WIND...60MPH
 
$$

Lambert

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 2, 11:07 AM EDT	Special Weather Statement	CTP	McKean	38 min
Oct 2, 1:12 PM EDT	Flash Flood Watch	CTP	Centre, Clearfield, Clinton, Columbia, Lycoming, McKean and 7 more	9 hr
Oct 2, 1:20 PM EDT	Areal Flood Advisory	CTP	Potter	3 hr
Oct 2, 1:59 PM EDT	Special Weather Statement	CTP	Tioga	61 min
Oct 2, 2:48 PM EDT	Special Weather Statement	CTP	Tioga	42 min
Oct 2, 3:03 PM EDT	Severe Thunderstorm Warning	CTP	Tioga	42 min
Oct 2, 3:11 PM EDT	Severe Thunderstorm Warning	CTP	Warren	79 min
Oct 2, 3:24 PM EDT	Severe Thunderstorm Warning	CTP	Potter, Tioga	96 min
Oct 2, 3:27 PM EDT	Special Weather Statement	CTP	Lycoming	33 min
Oct 2, 3:38 PM EDT	Tornado Warning	CTP	Warren	67 min
Oct 2, 3:48 PM EDT	Severe Thunderstorm Warning	CTP	Columbia, Lycoming, Montour, Northumberland, Sullivan	57 min
Oct 2, 3:51 PM EDT	Tornado Warning	CTP	Columbia, Lycoming, Montour, Northumberland	54 min
Oct 2, 3:59 PM EDT	Areal Flood Advisory	CTP	Potter, Tioga	3 hr
Oct 2, 4:05 PM EDT	Special Weather Statement	CTP	McKean	55 min
Oct 2, 4:06 PM EDT	Areal Flood Advisory	CTP	Warren	3 hr
Oct 2, 4:15 PM EDT	Tornado Warning	CTP	Potter, Tioga	45 min
Oct 2, 4:19 PM EDT	Severe Thunderstorm Warning	CTP	Franklin, Huntingdon	56 min
Oct 2, 4:26 PM EDT	Severe Thunderstorm Warning	CTP	Cameron, Clearfield, Elk	64 min
Oct 2, 4:26 PM EDT	Severe Thunderstorm Warning	CTP	Elk	49 min
Oct 2, 4:26 PM EDT	Tornado Warning	CTP	Columbia, Lycoming, Montour	49 min
Oct 2, 4:42 PM EDT	Tornado Warning	CTP	Clearfield	63 min
Oct 2, 4:48 PM EDT	Tornado Warning Tornado observed	CTP	Lycoming, Tioga	42 min
Oct 2, 4:49 PM EDT	Special Weather Statement	CTP	Sullivan	26 min
Oct 2, 4:54 PM EDT	Special Weather Statement	CTP	Tioga	36 min
Oct 2, 5:02 PM EDT	Tornado Warning	CTP	Clearfield, Elk	43 min
Oct 2, 5:17 PM EDT	Severe Thunderstorm Warning	CTP	Cumberland	58 min
Oct 2, 5:24 PM EDT	Severe Thunderstorm Warning	CTP	Lycoming, Tioga	36 min
Oct 2, 5:28 PM EDT	Severe Thunderstorm Warning	CTP	Lycoming, Sullivan	34 min
Oct 2, 5:32 PM EDT	Tornado Warning	CTP	Clearfield	58 min
Oct 2, 5:33 PM EDT	Tornado Warning	CTP	Lycoming, Tioga	42 min
Oct 2, 5:39 PM EDT	Tornado Warning	CTP	Lycoming, Sullivan	66 min
Oct 2, 5:56 PM EDT	Areal Flood Advisory	CTP	Lycoming, Tioga	3 hr
Oct 2, 6:06 PM EDT	Severe Thunderstorm Warning	CTP	Somerset	32 min
Oct 2, 6:19 PM EDT	Areal Flood Advisory	CTP	Clearfield, Elk	3 hr
Oct 2, 6:25 PM EDT	Areal Flood Advisory	CTP	Lycoming, Sullivan	3 hr
Oct 2, 6:37 PM EDT	Severe Thunderstorm Warning	CTP	Centre, Clinton, Union	53 min
Oct 2, 6:39 PM EDT	Severe Thunderstorm Warning	CTP	Columbia, Sullivan	21 min
Oct 2, 7:00 PM EDT	Severe Thunderstorm Warning	CTP	Centre, Clearfield	90 min
Oct 2, 7:13 PM EDT	Areal Flood Advisory	CTP	Cameron, Centre, Clinton	3 hr
Oct 2, 7:44 PM EDT	Special Weather Statement	CTP	Northumberland	31 min
Oct 2, 7:53 PM EDT	Flash Flood Warning	CTP	Columbia, Lycoming, Sullivan	3 hr
Oct 2, 7:57 PM EDT	Special Weather Statement	CTP	Snyder	33 min
Oct 2, 7:59 PM EDT	Flash Flood Warning	CTP	Centre, Clearfield	3 hr

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2018 Every severe thunderstorm warning in 2018

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.