Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 95, NWS State College, PA

July 7, 20216 counties in Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at Jul 7, 2021, 8:12 PM EDT for 6 counties in Pennsylvania. It was in force for 48 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: Jul 7, 2021, 8:12 PM EDT (00:12 UTC)
Expired: Jul 7, 2021, 9:00 PM EDT
In force: 48 min
Issued by: NWS State College, PA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Columbia County, PA, Lycoming County, PA, Montour County, PA, Northumberland County, PA, Sullivan County, PA, Tioga County, PA

The radar

The State College radar (KCCX), 114 km from the middle of the area, began a volume at 00:14 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
Jul 7, 8:17 PM EDT	TSTM WND GST 64	Montoursville, PA	KIPT MEASURED THUNDERSTORM WIND GUST 64 MPH.
Jul 7, 8:31 PM EDT	TSTM WND DMG	1 Ene Leonard Harrison, PA	DEPT/RESCUE
Jul 7, 8:31 PM EDT	TSTM WND DMG	1 Ene Leonard Harrison, PA	TREES ACROSS THE ROAD.
Jul 7, 8:41 PM EDT	TSTM WND DMG	4 E Picture Rocks, PA	TREES DOWN ON WIRES. POLE SNAPPED.
Jul 7, 8:49 PM EDT	TSTM WND DMG	3 Ssw Central, PA	TREES DOWN ON WIRES NORTH OF BENTON.

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
Jul 7, 2:41 PM EDT	Severe Thunderstorm Watch	SPC	10 hr

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 00:00Z, 0.2 hours before the alert went out and 239 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: 105 J/kg
Mixed-layer CIN: -202 J/kg
Mixed-layer LCL: 707 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 130 m²/s²
0-3 km storm-relative helicity: 179 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.9

Open this sounding in Storm Lab

The text

As transmitted.

591 
WUUS51 KCTP 080012
SVRCTP
PAC037-081-093-097-113-117-080100-
/O.NEW.KCTP.SV.W.0095.210708T0012Z-210708T0100Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service State College PA
812 PM EDT Wed Jul 7 2021

The National Weather Service in State College PA has issued a

* Severe Thunderstorm Warning for...
  Northwestern Northumberland County in central Pennsylvania...
  Northwestern Montour County in central Pennsylvania...
  Central Lycoming County in north central Pennsylvania...
  Northern Columbia County in central Pennsylvania...
  Southern Tioga County in north central Pennsylvania...
  Sullivan County in north central Pennsylvania...

* Until 900 PM EDT.

* At 812 PM EDT, severe thunderstorms were located along a line
  extending from near Galeton to near English Center to near
  Loyalsockville to near Montoursville, moving east at 40 mph.

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

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees.

* Locations impacted include...
  Williamsport, Berwick, Montoursville, Morris, Muncy, Hughesville,
  Montgomery, Blossburg, Arnot, Allenwood, Jerseytown, Rohrsburg,
  Iola, Jamison City, Eyers Grove, Waller, Lairdsville, Central,
  Leonard Harrison State Park and Ralston.

This includes Interstate 180 from mile markers 4 to 26.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4160 7687 4156 7649 4144 7626 4131 7631
      4120 7632 4113 7627 4114 7623 4105 7623
      4111 7690 4114 7690 4115 7696 4112 7697
      4112 7701 4129 7700 4162 7760 4170 7761
      4171 7689
TIME...MOT...LOC 0012Z 271DEG 36KT 4166 7761 4148 7728 4130 7694 4120
7694

HAIL...1.00IN
WIND...60MPH
 
$$

Jurewicz

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 7, 8:02 PM EDT	Special Weather Statement	CTP	Tioga	58 min
Jul 7, 8:04 PM EDT	Severe Thunderstorm Warning	CTP	Tioga	56 min
Jul 7, 8:10 PM EDT	Special Weather Statement	CTP	Northumberland	35 min
Jul 7, 8:20 PM EDT	Special Weather Statement	CTP	Fulton	25 min
Jul 7, 8:21 PM EDT	Severe Thunderstorm Warning	CTP	Tioga	39 min
Jul 7, 8:25 PM EDT	Special Weather Statement	CTP	Snyder	35 min
Jul 7, 8:40 PM EDT	Severe Thunderstorm Warning	CTP	Cambria, Somerset	65 min
Jul 7, 8:47 PM EDT	Severe Thunderstorm Warning	CTP	Columbia, Sullivan	28 min
Jul 7, 8:49 PM EDT	Special Weather Statement	CTP	Franklin	26 min
Jul 7, 9:12 PM EDT	Special Weather Statement	CTP	Centre	33 min
Jul 7, 9:16 PM EDT	Severe Thunderstorm Warning	CTP	Blair, Cambria	44 min
Jul 7, 9:24 PM EDT	Areal Flood Advisory	CTP	Columbia, Sullivan	2 hr
Jul 7, 9:36 PM EDT	Special Weather Statement	CTP	Columbia	24 min
Jul 7, 9:43 PM EDT	Special Weather Statement	CTP	Centre	32 min
Jul 7, 10:04 PM EDT	Special Weather Statement	CTP	Centre, Clearfield	26 min
Jul 7, 10:07 PM EDT	Special Weather Statement	CTP	Schuylkill	23 min
Jul 7, 10:14 PM EDT	Special Weather Statement	CTP	Union	46 min
Jul 7, 10:20 PM EDT	Special Weather Statement	CTP	Snyder	25 min
Jul 7, 10:33 PM EDT	Special Weather Statement	CTP	Union	27 min
Jul 7, 11:02 PM EDT	Special Weather Statement	CTP	Montour, Union	28 min
Jul 8, 2:12 PM EDT	Special Weather Statement	CTP	York	48 min
Jul 8, 2:36 PM EDT	Special Weather Statement	CTP	Lancaster	39 min
Jul 8, 3:15 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster, Lebanon	60 min
Jul 8, 3:17 PM EDT	Severe Thunderstorm Warning	CTP	Adams, Cumberland, Dauphin, Franklin, York	73 min
Jul 8, 3:38 PM EDT	Severe Thunderstorm Warning	CTP	Dauphin, Lancaster, Lebanon, York	52 min
Jul 8, 4:25 PM EDT	Areal Flood Advisory	CTP	Adams, Cumberland	112 min
Jul 8, 4:31 PM EDT	Areal Flood Advisory	CTP	Lancaster, York	58 min
Jul 8, 4:36 PM EDT	Special Weather Statement	CTP	Adams, Cumberland, Dauphin, Franklin, Juniata, Lebanon and 3 more	54 min
Jul 8, 4:48 PM EDT	Severe Thunderstorm Warning	CTP	Lebanon	27 min
Jul 8, 4:51 PM EDT	Areal Flood Advisory	CTP	Cumberland, Dauphin, Lebanon, Perry	103 min
Jul 8, 5:31 PM EDT	Special Weather Statement	CTP	Juniata	44 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.