Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 72, NWS State College, PA

July 6, 2021Columbia County, Sullivan County, Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at Jul 6, 2021, 3:36 PM EDT for Columbia County, Sullivan County, Pennsylvania. It was in force for 24 min. 2 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 6, 2021, 3:36 PM EDT (19:36 UTC)
Expired: Jul 6, 2021, 4:00 PM EDT
In force: 24 min
Issued by: NWS State College, PA
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Columbia County, PA, Sullivan County, PA

The radar

The Binghamton radar (KBGM), 107 km from the middle of the area, began a volume at 19:39 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 6, 3:48 PM EDT	TSTM WND DMG	2 Nw Central, PA	SEVERAL TREES DOWN AT 1303 ELK GROVE ROAD, SUGARLOAF TWP.
Jul 6, 3:50 PM EDT	TSTM WND DMG	1 N Central, PA	LARGE TREE DOWN ACROSS JAMISON CITY ROAD.

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 6, 1:13 PM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 7.6 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: 997 J/kg
Mixed-layer CIN: -69 J/kg
Mixed-layer LCL: 868 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: 78 m²/s²
0-3 km storm-relative helicity: 64 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.6

Open this sounding in Storm Lab

The text

As transmitted.

038 
WUUS51 KCTP 061936
SVRCTP
PAC037-113-062000-
/O.NEW.KCTP.SV.W.0072.210706T1936Z-210706T2000Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service State College PA
336 PM EDT Tue Jul 6 2021

The National Weather Service in State College PA has issued a

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

* Until 400 PM EDT.

* At 336 PM EDT, a severe thunderstorm was located near Muncy Valley,
  moving southeast at 30 mph.

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

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Jamison City, Central and Muncy Valley. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4131 7631 4126 7631 4126 7632 4121 7632
      4126 7647 4127 7645 4128 7646 4131 7659
      4133 7660 4141 7653 4134 7630
TIME...MOT...LOC 1936Z 294DEG 24KT 4135 7649 

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

Travis

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 6, 11:38 AM EDT	Special Weather Statement	CTP	Warren	52 min
Jul 6, 11:59 AM EDT	Special Weather Statement	CTP	McKean	46 min
Jul 6, 12:45 PM EDT	Special Weather Statement	CTP	Potter	45 min
Jul 6, 1:26 PM EDT	Special Weather Statement	CTP	Tioga	34 min
Jul 6, 1:51 PM EDT	Special Weather Statement	CTP	Warren	24 min
Jul 6, 2:21 PM EDT	Special Weather Statement	CTP	McKean, Warren	54 min
Jul 6, 2:49 PM EDT	Severe Thunderstorm Warning	CTP	McKean, Warren	56 min
Jul 6, 3:01 PM EDT	Special Weather Statement	CTP	Sullivan	44 min
Jul 6, 3:17 PM EDT	Special Weather Statement	CTP	Sullivan	43 min
Jul 6, 3:22 PM EDT	Severe Thunderstorm Warning	CTP	Sullivan	23 min
Jul 6, 3:57 PM EDT	Special Weather Statement	CTP	Dauphin	33 min
Jul 6, 4:05 PM EDT	Severe Thunderstorm Warning	CTP	Dauphin, Lebanon	40 min
Jul 6, 4:31 PM EDT	Special Weather Statement	CTP	Elk	29 min
Jul 6, 4:41 PM EDT	Severe Thunderstorm Warning	CTP	Dauphin, Lancaster, Lebanon	33 min
Jul 6, 4:48 PM EDT	Special Weather Statement	CTP	Schuylkill	27 min
Jul 6, 6:52 PM EDT	Special Weather Statement	CTP	McKean	23 min
Jul 6, 6:59 PM EDT	Heat Advisory	CTP	Adams, Cumberland, Dauphin, Franklin, Lancaster, Lebanon and 2 more	24 hr

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.