Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 63, NWS State College, PA

June 30, 2021Clinton County, Lycoming County, Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at Jun 30, 2021, 2:14 PM EDT for Clinton County, Lycoming County, Pennsylvania. It was in force for 50 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 30, 2021, 2:14 PM EDT (18:14 UTC)
Expired: Jun 30, 2021, 3:04 PM EDT
In force: 50 min
Issued by: NWS State College, PA
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Clinton County, PA, Lycoming County, PA

The radar

The State College radar (KCCX), 92 km from the middle of the area, began a volume at 18:18 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 30, 2:40 PM EDT	TSTM WND DMG	2 Sw Montoursville, PA	TREES ON WIRES.

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 30, 12:46 PM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 6.2 hours before the alert went out and 236 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: 366 J/kg
Mixed-layer CIN: -80 J/kg
Mixed-layer LCL: 876 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 73 m²/s²
0-3 km storm-relative helicity: 109 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 1.2

Open this sounding in Storm Lab

The text

As transmitted.

122 
WUUS51 KCTP 301814
SVRCTP
PAC035-081-301915-
/O.NEW.KCTP.SV.W.0063.210630T1814Z-210630T1915Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service State College PA
214 PM EDT Wed Jun 30 2021

The National Weather Service in State College PA has issued a

* Severe Thunderstorm Warning for...
  Central Lycoming County in north central Pennsylvania...
  East central Clinton County in north central Pennsylvania...

* Until 315 PM EDT.

* At 214 PM EDT, a severe thunderstorm was located near Jersey Shore,
  moving east at 30 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Williamsport, Montoursville, Jersey Shore, Muncy, Montgomery, Avis,
  Duboistown, McElhattan, Elimsport, Waterville, Cogan Station,
  Collomsville, Trout Run, Loyalsockville, South Williamsport, Garden
  View, Oval, Salladasburg, Williamsport Airport and Little League
  World Series Complex.

This includes Interstate 180 from mile markers 9 to 29.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4125 7675 4117 7678 4116 7687 4114 7690
      4115 7696 4112 7697 4116 7744 4129 7745
      4139 7711 4144 7685
TIME...MOT...LOC 1814Z 249DEG 26KT 4125 7729 

HAIL...<.75IN
WIND...60MPH
 
$$

Colbert

2 follow-up statements

796 
WWUS51 KCTP 301844
SVSCTP

Severe Weather Statement
National Weather Service State College PA
244 PM EDT Wed Jun 30 2021

PAC035-301853-
/O.CAN.KCTP.SV.W.0063.000000T0000Z-210630T1915Z/
Clinton PA-
244 PM EDT Wed Jun 30 2021

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL CLINTON COUNTY IS
CANCELLED...

The storms which prompted the warning have moved out of the warned 
area. Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 800 PM EDT for
central and north central Pennsylvania.

LAT...LON 4125 7675 4117 7678 4116 7687 4115 7689
      4115 7696 4114 7696 4113 7712 4114 7717
      4114 7724 4117 7724 4126 7725 4133 7712
      4139 7696 4141 7683
TIME...MOT...LOC 1843Z 257DEG 25KT 4134 7688 4128 7700 4121 7718 

$$

PAC081-301915-
/O.CON.KCTP.SV.W.0063.000000T0000Z-210630T1915Z/
Lycoming PA-
244 PM EDT Wed Jun 30 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 315 PM EDT
FOR SOUTH CENTRAL LYCOMING COUNTY...

At 243 PM EDT, severe thunderstorms were located along a line
extending from Loyalsockville to near Williamsport to near Jersey
Shore, moving east at 30 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Williamsport, Montoursville, Muncy, Montgomery, Duboistown, Cogan
Station, Collomsville, Loyalsockville, South Williamsport, Garden
View, Oval, Salladasburg, Williamsport Airport and Little League
World Series Complex.

This includes Interstate 180 from mile markers 9 to 29.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4125 7675 4117 7678 4116 7687 4115 7689
      4115 7696 4114 7696 4113 7712 4114 7717
      4114 7724 4117 7724 4126 7725 4133 7712
      4139 7696 4141 7683
TIME...MOT...LOC 1843Z 257DEG 25KT 4134 7688 4128 7700 4121 7718 

HAIL...<.75IN
WIND...60MPH
 
$$

Colbert

578 
WWUS51 KCTP 301904
SVSCTP

Severe Weather Statement
National Weather Service State College PA
304 PM EDT Wed Jun 30 2021

PAC081-301913-
/O.CAN.KCTP.SV.W.0063.000000T0000Z-210630T1915Z/
Lycoming PA-
304 PM EDT Wed Jun 30 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL LYCOMING COUNTY
IS CANCELLED...
            
The storms which prompted the warning have weakened below severe
limits, and no longer pose an immediate threat to life or property.
Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 800 PM EDT for
central and north central Pennsylvania.

LAT...LON 4125 7675 4117 7678 4116 7687 4115 7689
      4115 7696 4114 7696 4113 7712 4114 7717
      4114 7724 4117 7724 4126 7725 4133 7712
      4139 7696 4141 7683
TIME...MOT...LOC 1901Z 249DEG 26KT 4139 7671 4133 7683 4126 7701 

$$

Colbert

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 29, 8:56 PM EDT	Heat Advisory	CTP	Columbia, Dauphin, Lancaster, Lebanon, Lycoming, Montour and 5 more	22 hr
Jun 29, 9:10 PM EDT	Special Weather Statement	CTP	Centre	20 min
Jun 29, 9:16 PM EDT	Severe Thunderstorm Warning	CTP	McKean, Warren	89 min
Jun 29, 9:27 PM EDT	Special Weather Statement	CTP	Centre	18 min
Jun 29, 9:30 PM EDT	Severe Thunderstorm Warning	CTP	Centre	45 min
Jun 29, 10:17 PM EDT	Special Weather Statement	CTP	Sullivan	28 min
Jun 29, 10:27 PM EDT	Special Weather Statement	CTP	Potter	33 min
Jun 29, 10:42 PM EDT	Severe Thunderstorm Warning	CTP	Potter, Tioga	63 min
Jun 29, 10:59 PM EDT	Special Weather Statement	CTP	Lycoming	31 min
Jun 29, 11:23 PM EDT	Special Weather Statement	CTP	Sullivan	22 min
Jun 29, 11:38 PM EDT	Special Weather Statement	CTP	Tioga	67 min
Jun 29, 11:39 PM EDT	Special Weather Statement	CTP	Sullivan	66 min
Jun 30, 6:59 AM EDT	Special Weather Statement	CTP	McKean	46 min
Jun 30, 1:13 PM EDT	Special Weather Statement	CTP	Warren	47 min
Jun 30, 1:46 PM EDT	Special Weather Statement	CTP	Clinton	29 min
Jun 30, 1:59 PM EDT	Special Weather Statement	CTP	McKean	46 min
Jun 30, 2:25 PM EDT	Severe Thunderstorm Warning	CTP	Cambria	28 min
Jun 30, 3:15 PM EDT	Special Weather Statement	CTP	Cambria	45 min
Jun 30, 3:24 PM EDT	Special Weather Statement	CTP	Centre	36 min
Jun 30, 3:46 PM EDT	Severe Thunderstorm Warning	CTP	Centre, Montour, Northumberland, Snyder, Union	44 min
Jun 30, 3:59 PM EDT	Special Weather Statement	CTP	Somerset	46 min
Jun 30, 4:22 PM EDT	Special Weather Statement	CTP	Juniata	38 min
Jun 30, 4:42 PM EDT	Special Weather Statement	CTP	Columbia, Montour	48 min
Jun 30, 5:05 PM EDT	Special Weather Statement	CTP	Fulton	40 min
Jun 30, 5:24 PM EDT	Severe Thunderstorm Warning	CTP	Franklin, Fulton	48 min
Jun 30, 6:10 PM EDT	Special Weather Statement	CTP	Cumberland	35 min
Jun 30, 6:27 PM EDT	Severe Thunderstorm Warning	CTP	Cumberland	48 min
Jun 30, 7:00 PM EDT	Special Weather Statement	CTP	Dauphin	15 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.