Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 98, NWS State College, PA

July 7, 2021Columbia County, Sullivan County, Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at Jul 7, 2021, 8:47 PM EDT for Columbia County, Sullivan County, Pennsylvania. It was in force for 28 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: Jul 7, 2021, 8:47 PM EDT (00:47 UTC)
Expired: Jul 7, 2021, 9:15 PM EDT
In force: 28 min
Issued by: NWS State College, PA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 70.0 mph

Counties Columbia County, PA, Sullivan County, PA

The radar

The Binghamton radar (KBGM), 111 km from the middle of the area, began a volume at 00:48 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, 8:49 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, 0.8 hours before the alert went out and 262 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.

872 
WUUS51 KCTP 080047
SVRCTP
PAC037-113-080115-
/O.NEW.KCTP.SV.W.0098.210708T0047Z-210708T0115Z/

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

The National Weather Service in State College PA has issued a

* Severe Thunderstorm Warning for...
  Northeastern Columbia County in central Pennsylvania...
  Sullivan County in north central Pennsylvania...

* Until 915 PM EDT.

* At 846 PM EDT, severe thunderstorms were located along a line
  extending from near Shunk to near Lincoln Falls to near Biggertown
  to near Waller to near Eyers Grove, moving east at 45 mph.

  HAZARD...70 mph wind gusts and quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect considerable 
           tree damage. Wind damage is also likely to mobile homes, 
           roofs, and outbuildings.

* Severe thunderstorms will be near...
  Rohrsburg, Jamison City, Central and Waller around 850 PM EDT.
  Ricketts Glen State Park around 900 PM EDT.

Other locations impacted by these severe thunderstorms include
Laporte, Eagles Mere, Orangeville, Dushore, Benton, Stillwater and
Forksville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4102 7654 4118 7643 4126 7648 4127 7645
      4128 7649 4146 7666 4152 7679 4159 7681
      4154 7622 4131 7631 4120 7632 4113 7627
      4114 7623 4107 7623
TIME...MOT...LOC 0046Z 254DEG 54KT 4156 7682 4147 7663 4131 7647 4119
7639 4110 7646

HAIL...1.00IN
WIND...70MPH
 
$$

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, 8:12 PM EDT	Severe Thunderstorm Warning	CTP	Columbia, Lycoming, Montour, Northumberland, Sullivan, Tioga	48 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, 8:49 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.