Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 56, NWS State College, PA

June 21, 2021Lycoming County, Sullivan County, Tioga County, Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at Jun 21, 2021, 5:31 PM EDT for Lycoming County, Sullivan County, Tioga County, Pennsylvania. It was in force for 44 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: Jun 21, 2021, 5:31 PM EDT (21:31 UTC)
Expired: Jun 21, 2021, 6:15 PM EDT
In force: 44 min
Issued by: NWS State College, PA
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Lycoming County, PA, Sullivan County, PA, Tioga County, PA

The radar

The Binghamton radar (KBGM), 107 km from the middle of the area, began a volume at 21:35 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 21, 5:55 PM EDT	TSTM WND DMG	3 Nnw Eagles Mere, PA	TREES DOWN ALONG WORLDS END RD.
Jun 21, 6:00 PM EDT	TSTM WND DMG	3 Nw Laporte, PA	TREES DOWN AT ROUTE 154 AND SHANERSBURG RD.
Jun 21, 6:08 PM EDT	TSTM WND DMG	3 Se Forksville, PA	MULTIPLE TREES DOWN ON SR-154 NEAR WORLDS END STATE PARK.

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 21, 2:20 PM EDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 9.5 hours before the alert went out and 219 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: 9 J/kg
Mixed-layer CIN: -284 J/kg
Mixed-layer LCL: 1192 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 257 m²/s²
0-3 km storm-relative helicity: 304 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

104 
WUUS51 KCTP 212131
SVRCTP
PAC081-113-117-212215-
/O.NEW.KCTP.SV.W.0056.210621T2131Z-210621T2215Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service State College PA
531 PM EDT Mon Jun 21 2021

The National Weather Service in State College PA has issued a

* Severe Thunderstorm Warning for...
  Central Lycoming County in north central Pennsylvania...
  Southeastern Tioga County in north central Pennsylvania...
  Northwestern Sullivan County in north central Pennsylvania...

* Until 615 PM EDT.

* At 529 PM EDT, severe thunderstorms were located along a line
  extending from near English Center to Duboistown, moving northeast
  at 50 mph.

  HAZARD...60 mph wind gusts and penny size hail.

  SOURCE...Law enforcement.

  IMPACT...Expect damage to roofs, siding, and trees.

* Locations impacted include...
  Williamsport, Montoursville, Duboistown, Kettle Creek Gorge, Cogan
  Station, Ralston, Ogdensburg, Trout Run, Lincoln Falls, Barbours,
  Shunk, Buttonwood, Loyalsockville, South Williamsport, Garden View,
  Forksville, Eagles Mere, Hillsgrove and Little League World Series
  Complex.

This includes Interstate 180 near mile marker 22...and from mile
markers 25 to 29.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

These storms have a history of producing widespread wind damage 
across Clinton County. SEEK SHELTER NOW inside a sturdy structure 
and stay away from windows!

&&

LAT...LON 4160 7687 4157 7662 4147 7645 4119 7709
      4137 7733 4172 7689
TIME...MOT...LOC 2129Z 227DEG 45KT 4138 7722 4123 7704 

HAIL...0.75IN
WIND...60MPH
 
$$

JCG

1 follow-up statement

537 
WWUS51 KCTP 212203
SVSCTP

Severe Weather Statement
National Weather Service State College PA
603 PM EDT Mon Jun 21 2021

PAC081-113-117-212215-
/O.CON.KCTP.SV.W.0056.000000T0000Z-210621T2215Z/
Lycoming PA-Tioga PA-Sullivan PA-
603 PM EDT Mon Jun 21 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 PM EDT
FOR CENTRAL LYCOMING...SOUTHEASTERN TIOGA AND NORTHWESTERN SULLIVAN
COUNTIES...

At 602 PM EDT, severe thunderstorms were located along a line
extending from Canton to near Lincoln Falls, moving northeast at 50
mph.

HAZARD...60 mph wind gusts and penny size hail.

SOURCE...Law enforcement.

IMPACT...Expect damage to roofs, siding, and trees.

Locations impacted include...
Williamsport, Montoursville, Duboistown, Kettle Creek Gorge, Cogan
Station, Ralston, Ogdensburg, Trout Run, Lincoln Falls, Barbours,
Shunk, Buttonwood, Loyalsockville, South Williamsport, Garden View,
Forksville, Eagles Mere, Hillsgrove and Little League World Series
Complex.

This includes Interstate 180 near mile marker 22...and from mile
markers 25 to 29.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This is a DANGEROUS SITUATION. These storms have a history of 
producing wind damage. SEEK SHELTER NOW inside a sturdy structure 
and stay away from windows.
 
&&

LAT...LON 4160 7687 4157 7662 4147 7645 4119 7709
      4142 7723 4172 7689
TIME...MOT...LOC 2202Z 227DEG 45KT 4164 7685 4149 7667 

HAIL...0.75IN
WIND...60MPH
 
$$

JCG

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 20, 8:03 PM EDT	Special Weather Statement	CTP	Juniata	12 min
Jun 20, 8:13 PM EDT	Severe Thunderstorm Warning	CTP	Juniata, Snyder	24 min
Jun 20, 8:29 PM EDT	Special Weather Statement	CTP	Dauphin	16 min
Jun 20, 8:35 PM EDT	Special Weather Statement	CTP	McKean	25 min
Jun 20, 8:47 PM EDT	Special Weather Statement	CTP	Dauphin	13 min
Jun 20, 9:02 PM EDT	Special Weather Statement	CTP	Dauphin	13 min
Jun 20, 9:16 PM EDT	Special Weather Statement	CTP	Schuylkill	14 min
Jun 20, 9:23 PM EDT	Severe Thunderstorm Warning	CTP	Columbia, Northumberland, Schuylkill	50 min
Jun 20, 9:29 PM EDT	Areal Flood Advisory	CTP	Lebanon, Schuylkill	2 hr
Jun 21, 4:18 AM EDT	Special Weather Statement	CTP	Warren	42 min
Jun 21, 2:19 PM EDT	Special Weather Statement	CTP	Warren	41 min
Jun 21, 2:43 PM EDT	Severe Thunderstorm Warning	CTP	McKean, Warren	47 min
Jun 21, 2:55 PM EDT	Special Weather Statement	CTP	McKean	35 min
Jun 21, 3:09 PM EDT	Severe Thunderstorm Warning	CTP	McKean, Potter	21 min
Jun 21, 3:14 PM EDT	Severe Thunderstorm Warning	CTP	McKean	31 min
Jun 21, 3:20 PM EDT	Special Weather Statement	CTP	Clearfield	25 min
Jun 21, 3:26 PM EDT	Severe Thunderstorm Warning	CTP	Cameron, Elk, McKean, Warren	49 min
Jun 21, 3:35 PM EDT	Special Weather Statement	CTP	Centre	25 min
Jun 21, 3:55 PM EDT	Special Weather Statement	CTP	Tioga	35 min
Jun 21, 3:58 PM EDT	Special Weather Statement	CTP	Snyder	32 min
Jun 21, 4:15 PM EDT	Special Weather Statement	CTP	Cameron, Potter	45 min
Jun 21, 4:17 PM EDT	Special Weather Statement	CTP	Cambria	28 min
Jun 21, 4:18 PM EDT	Special Weather Statement	CTP	Sullivan	27 min
Jun 21, 4:18 PM EDT	Special Weather Statement	CTP	Franklin	27 min
Jun 21, 4:21 PM EDT	Special Weather Statement	CTP	Union	24 min
Jun 21, 4:24 PM EDT	Special Weather Statement	CTP	Centre	21 min
Jun 21, 4:28 PM EDT	Severe Thunderstorm Warning	CTP	Cambria	47 min
Jun 21, 4:31 PM EDT	Special Weather Statement	CTP	Lycoming	44 min
Jun 21, 4:31 PM EDT	Severe Thunderstorm Warning	CTP	Adams, Franklin	59 min
Jun 21, 4:39 PM EDT	Severe Thunderstorm Warning	CTP	Cambria, Somerset	36 min
Jun 21, 4:43 PM EDT	Severe Thunderstorm Warning	CTP	Centre	32 min
Jun 21, 4:45 PM EDT	Severe Thunderstorm Warning	CTP	Lycoming, Sullivan, Tioga	30 min
Jun 21, 4:52 PM EDT	Special Weather Statement	CTP	Clinton	23 min
Jun 21, 4:55 PM EDT	Special Weather Statement	CTP	Blair	20 min
Jun 21, 4:56 PM EDT	Special Weather Statement	CTP	Sullivan	19 min
Jun 21, 5:05 PM EDT	Severe Thunderstorm Warning	CTP	Adams, Cumberland, York	40 min
Jun 21, 5:08 PM EDT	Severe Thunderstorm Warning	CTP	Centre, Clinton, Lycoming	37 min
Jun 21, 5:13 PM EDT	Special Weather Statement	CTP	Bedford, Blair	32 min
Jun 21, 5:41 PM EDT	Severe Thunderstorm Warning	CTP	York	34 min
Jun 21, 5:45 PM EDT	Special Weather Statement	CTP	Montour	45 min
Jun 21, 5:52 PM EDT	Special Weather Statement	CTP	Columbia, Northumberland	23 min
Jun 21, 5:58 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster	47 min
Jun 21, 6:02 PM EDT	Special Weather Statement	CTP	Dauphin	28 min
Jun 21, 6:08 PM EDT	Special Weather Statement	CTP	Sullivan	37 min
Jun 21, 6:15 PM EDT	Severe Thunderstorm Warning	CTP	Sullivan	15 min
Jun 21, 6:20 PM EDT	Special Weather Statement	CTP	Schuylkill	25 min
Jun 21, 6:23 PM EDT	Special Weather Statement	CTP	Schuylkill	37 min
Jun 21, 6:49 PM EDT	Special Weather Statement	CTP	Schuylkill	26 min
Jun 21, 7:00 PM EDT	Special Weather Statement	CTP	Somerset	15 min
Jun 21, 7:12 PM EDT	Special Weather Statement	CTP	Carbon	18 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2021 Every severe thunderstorm warning in 2021

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.