Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 73, NWS State College, PA

July 6, 2021Dauphin County, Lebanon County, Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at Jul 6, 2021, 4:05 PM EDT for Dauphin County, Lebanon County, Pennsylvania. It was in force for 40 min. 4 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, 4:05 PM EDT (20:05 UTC)
Expired: Jul 6, 2021, 4:45 PM EDT
In force: 40 min
Issued by: NWS State College, PA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Dauphin County, PA, Lebanon County, PA

The radar

The State College radar (KCCX), 139 km from the middle of the area, began a volume at 20:07 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, 4:39 PM EDT	HAIL 1	Hershey, PA	QUARTER-SIZED HAIL IN HERSHEY.
Jul 6, 4:40 PM EDT	HAIL 1.25	Hershey, PA	CORRECTS PREVIOUS HAIL REPORT FROM HERSHEY. HALF-DOLLAR SIZED HAIL REPORTED.
Jul 6, 4:49 PM EDT	TSTM WND DMG	2 S Campbelltown, PA	MULTIPLE TREES DOWN.
Jul 6, 4:55 PM EDT	TSTM WND DMG	2 Sw Campbelltown, PA	MULTIPLE TREES DOWN OVER ROADS. ONE TREE ON A HOUSE.

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, 1:32 PM EDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 8.1 hours before the alert went out and 153 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: 982 J/kg
Mixed-layer CIN: -161 J/kg
Mixed-layer LCL: 1216 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: 38 m²/s²
0-3 km storm-relative helicity: 39 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

080 
WUUS51 KCTP 062005
SVRCTP
PAC043-075-062045-
/O.NEW.KCTP.SV.W.0073.210706T2005Z-210706T2045Z/

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

The National Weather Service in State College PA has issued a

* Severe Thunderstorm Warning for...
  Southeastern Dauphin County in south central Pennsylvania...
  Southwestern Lebanon County in south central Pennsylvania...

* Until 445 PM EDT.

* At 405 PM EDT, a severe thunderstorm was located over Paxtang,
  moving east at 25 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.

* This severe thunderstorm will be near...
  Rutherford, Highspire and Skyline View around 410 PM EDT.
  Hummelstown, Middletown and Royalton around 420 PM EDT.
  Hershey and Campbelltown around 430 PM EDT.
  Lawn, Mount Gretna Heights and Timber Hills around 440 PM EDT.

Other locations impacted by this severe thunderstorm include Three
Mile Island, Mount Gretna, Penn State Harrisburg, Harrisburg
International Airport, Hershey Park, Harrisburg Area Community
College, Penn State College Of Medicine and Capital City Airport.

This includes the following Interstates...
 The Pennsylvania Turnpike from mile markers 246 to 264.
 Interstate 81 from mile markers 67 to 75.
 Interstate 83 from mile markers 43 to 50.
 Interstate 283 from mile markers 0 to 2.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4013 7674 4017 7675 4023 7686 4028 7691
      4037 7687 4027 7635 4025 7637 4024 7644
      4019 7657 4019 7661 4017 7664 4015 7670
      4012 7672
TIME...MOT...LOC 2005Z 289DEG 21KT 4026 7682 

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 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, 3:36 PM EDT	Severe Thunderstorm Warning	CTP	Columbia, Sullivan	24 min
Jul 6, 3:57 PM EDT	Special Weather Statement	CTP	Dauphin	33 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.