Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 74, NWS State College, PA

July 6, 2021Dauphin County, Lancaster County, Lebanon County, Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at Jul 6, 2021, 4:41 PM EDT for Dauphin County, Lancaster County, Lebanon County, Pennsylvania. It was in force for 33 min. 3 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, 4:41 PM EDT (20:41 UTC)
Expired: Jul 6, 2021, 5:14 PM EDT
In force: 33 min
Issued by: NWS State College, PA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Dauphin County, PA, Lancaster County, PA, Lebanon County, PA

The radar

The State College radar (KCCX), 147 km from the middle of the area, began a volume at 20:42 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, 4:49 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.
Jul 6, 5:00 PM EDT	HAIL 1.25	Hershey, PA	HALF-DOLLAR SIZED HAIL REPORTED.

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, 8.7 hours before the alert went out and 166 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.

907 
WUUS51 KCTP 062041
SVRCTP
PAC043-071-075-062145-
/O.NEW.KCTP.SV.W.0074.210706T2041Z-210706T2145Z/

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

The National Weather Service in State College PA has issued a

* Severe Thunderstorm Warning for...
  Northwestern Lancaster County in south central Pennsylvania...
  Southeastern Dauphin County in south central Pennsylvania...
  Southern Lebanon County in south central Pennsylvania...

* Until 545 PM EDT.

* At 441 PM EDT, a severe thunderstorm was located over Valley View,
  moving east at 20 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...
  Lawn around 450 PM EDT.
  Cornwall, Annville, Quentin, Timber Hills, Mount Gretna Heights, 
  Pleasant Hill and Cleona around 510 PM EDT.
  Lebanon, Lebanon South, Avon and Sand Hill around 520 PM EDT.
  Myerstown, Kleinfeltersville, Schaefferstown, Richland and 
  Brickerville around 540 PM EDT.

Other locations impacted by this severe thunderstorm include Penryn,
Mount Gretna, Avon Heights, Elizabethtown College, Hershey Park and
Penn State College Of Medicine.

This includes The Pennsylvania Turnpike from mile markers 252 to 277.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4015 7670 4034 7674 4042 7632 4039 7627
      4014 7622
TIME...MOT...LOC 2041Z 262DEG 17KT 4027 7663 

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

Jurewicz

2 follow-up statements

620 
WWUS51 KCTP 062101
SVSCTP

Severe Weather Statement
National Weather Service State College PA
501 PM EDT Tue Jul 6 2021

PAC043-062110-
/O.CAN.KCTP.SV.W.0074.000000T0000Z-210706T2145Z/
Dauphin PA-
501 PM EDT Tue Jul 6 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN DAUPHIN COUNTY IS
CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 1000 PM EDT for
south central Pennsylvania.

LAT...LON 4014 7622 4015 7669 4016 7667 4017 7666
      4017 7664 4019 7661 4020 7657 4036 7663
      4042 7632 4039 7627
TIME...MOT...LOC 2100Z 280DEG 36KT 4024 7646 

$$

PAC071-075-062145-
/O.CON.KCTP.SV.W.0074.000000T0000Z-210706T2145Z/
Lancaster PA-Lebanon PA-
501 PM EDT Tue Jul 6 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM EDT
FOR NORTHWESTERN LANCASTER AND SOUTHERN LEBANON COUNTIES...

At 500 PM EDT, a severe thunderstorm was located over Mount Gretna
Heights, 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.

This severe storm will be near...
  Lititz, Schaefferstown and Kleinfeltersville around 510 PM EDT.
  Brickerville and Rothsville around 520 PM EDT.

Other locations impacted by this severe thunderstorm include Penryn,
Mount Gretna, Avon Heights and Elizabethtown College.

This includes The Pennsylvania Turnpike from mile markers 259 to 277.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4014 7622 4015 7669 4016 7667 4017 7666
      4017 7664 4019 7661 4020 7657 4036 7663
      4042 7632 4039 7627
TIME...MOT...LOC 2100Z 280DEG 36KT 4024 7646 

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

Jurewicz

793 
WWUS51 KCTP 062114
SVSCTP

Severe Weather Statement
National Weather Service State College PA
514 PM EDT Tue Jul 6 2021

PAC071-075-062124-
/O.CAN.KCTP.SV.W.0074.000000T0000Z-210706T2145Z/
Lancaster PA-Lebanon PA-
514 PM EDT Tue Jul 6 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN LANCASTER AND
SOUTHERN LEBANON COUNTIES IS CANCELLED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 1000 PM EDT for
south central Pennsylvania.

LAT...LON 4014 7622 4015 7669 4016 7667 4017 7666
      4017 7664 4019 7661 4020 7657 4036 7663
      4042 7632 4039 7627
TIME...MOT...LOC 2113Z 262DEG 17KT 4021 7628 

$$

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, 4:05 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, 4:48 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.