Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 191, NWS State College, PA

August 10, 2021Dauphin County, Lebanon County, Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at Aug 10, 2021, 2:32 PM EDT for Dauphin County, Lebanon County, Pennsylvania. It was in force for 43 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Aug 10, 2021, 2:32 PM EDT (18:32 UTC)
Expired: Aug 10, 2021, 3:15 PM EDT
In force: 43 min
Issued by: NWS State College, PA
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Dauphin County, PA, Lebanon County, PA

The radar

The State College radar (KCCX), 134 km from the middle of the area, began a volume at 18:34 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.

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 6.5 hours before the alert went out and 161 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: 529 J/kg
Mixed-layer CIN: -120 J/kg
Mixed-layer LCL: 1096 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 37 m²/s²
0-3 km storm-relative helicity: 65 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

444 
WUUS51 KCTP 101832
SVRCTP
PAC043-075-101915-
/O.NEW.KCTP.SV.W.0191.210810T1832Z-210810T1915Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service State College PA
232 PM EDT Tue Aug 10 2021

The National Weather Service in State College PA has issued a

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

* Until 315 PM EDT.

* At 231 PM EDT, severe thunderstorms were located along a line
  extending from near Lykens to Enola, moving east at 25 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Harrisburg, Lebanon, Hershey, Colonial Park, Progress, Middletown,
  Palmyra, Linglestown, Steelton, Annville, Hummelstown, Cornwall,
  Myerstown, Paxtonia, Rutherford, Skyline View, Lawnton,
  Campbelltown, Bressler-Enhaut-Oberlin and Penbrook.

This includes the following Interstates...
 The Pennsylvania Turnpike from mile markers 246 to 263.
 Interstate 78 from mile markers 0 to 8.
 Interstate 81 from mile markers 66 to 96.
 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 4026 7629 4024 7644 4019 7661 4014 7670
      4016 7675 4017 7675 4020 7680 4020 7682
      4026 7690 4029 7692 4032 7691 4036 7695
      4058 7667 4056 7655 4034 7618
TIME...MOT...LOC 1831Z 287DEG 23KT 4052 7667 4031 7694 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Dangelo

1 follow-up statement

362 
WWUS51 KCTP 101856
SVSCTP

Severe Weather Statement
National Weather Service State College PA
256 PM EDT Tue Aug 10 2021

PAC043-075-101915-
/O.CON.KCTP.SV.W.0191.000000T0000Z-210810T1915Z/
Dauphin PA-Lebanon PA-
256 PM EDT Tue Aug 10 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 315 PM EDT
FOR SOUTHEASTERN DAUPHIN AND LEBANON COUNTIES...

At 256 PM EDT, severe thunderstorms were located along a line
extending from Lickdale to Rutherford, moving east at 25 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Harrisburg, Lebanon, Hershey, Colonial Park, Progress, Middletown,
Palmyra, Linglestown, Steelton, Annville, Hummelstown, Cornwall,
Myerstown, Paxtonia, Rutherford, Skyline View, Lawnton, Campbelltown,
Bressler-Enhaut-Oberlin and Penbrook.

This includes the following Interstates...
 The Pennsylvania Turnpike from mile markers 247 to 263.
 Interstate 78 from mile markers 0 to 8.
 Interstate 81 from mile markers 72 to 96.
 Interstate 83 from mile markers 43 to 49.
 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 4014 7670 4015 7672 4016 7672 4019 7677
      4019 7678 4020 7680 4021 7681 4025 7687
      4057 7661 4056 7655 4034 7618 4026 7629
      4024 7644 4019 7661
TIME...MOT...LOC 1856Z 287DEG 23KT 4048 7650 4027 7677 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Dangelo

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 10, 12:55 PM EDT	Heat Advisory	CTP	Adams, Columbia, Cumberland, Dauphin, Franklin, Juniata and 10 more	30 hr
Aug 10, 12:55 PM EDT	Heat Advisory	CTP	Adams, Bedford, Blair, Centre, Clinton, Columbia and 19 more	54 hr
Aug 10, 2:21 PM EDT	Special Weather Statement	CTP	Dauphin, Lebanon	24 min
Aug 10, 3:12 PM EDT	Special Weather Statement	CTP	Bedford, Blair, Cambria, Somerset	33 min
Aug 10, 3:23 PM EDT	Special Weather Statement	CTP	Berks	37 min
Aug 10, 3:25 PM EDT	Special Weather Statement	CTP	Huntingdon, Juniata	50 min
Aug 10, 3:28 PM EDT	Special Weather Statement	CTP	Schuylkill	47 min
Aug 10, 4:14 PM EDT	Special Weather Statement	CTP	Juniata	31 min
Aug 10, 4:31 PM EDT	Special Weather Statement	CTP	Centre	29 min
Aug 10, 4:48 PM EDT	Special Weather Statement	CTP	Perry	27 min
Aug 10, 5:18 PM EDT	Special Weather Statement	CTP	Dauphin	42 min
Aug 10, 5:50 PM EDT	Special Weather Statement	CTP	Adams	40 min
Aug 10, 5:52 PM EDT	Special Weather Statement	CTP	Lebanon	38 min
Aug 10, 6:12 PM EDT	Special Weather Statement	CTP	Lancaster	63 min
Aug 10, 6:17 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster, Lebanon	73 min
Aug 10, 6:29 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster, York	58 min
Aug 10, 7:00 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster, York	75 min
Aug 10, 7:33 PM EDT	Areal Flood Advisory	CTP	Lancaster	2 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.