Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 222, NWS State College, PA

August 12, 20215 counties in Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at Aug 12, 2021, 10:31 PM EDT for 5 counties in Pennsylvania. It was in force for 59 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: Aug 12, 2021, 10:31 PM EDT (02:31 UTC)
Expired: Aug 12, 2021, 11:30 PM EDT
In force: 59 min
Issued by: NWS State College, PA
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Columbia County, PA, Dauphin County, PA, Lebanon County, PA, Northumberland County, PA, Schuylkill County, PA

The radar

The State College radar (KCCX), 160 km from the middle of the area, began a volume at 02:33 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
Aug 12, 10:38 PM EDT	TSTM WND DMG	Beuchler, PA	TREE ACROSS I-81 BLOCKING ROADWAY.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 00:00Z, 2.5 hours before the alert went out and 222 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: 2808 J/kg
Mixed-layer CIN: -24 J/kg
Mixed-layer LCL: 1565 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: 153 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 4.9

Open this sounding in Storm Lab

The text

As transmitted.

166 
WUUS51 KCTP 130231
SVRCTP
PAC037-043-075-097-107-130330-
/O.NEW.KCTP.SV.W.0222.210813T0231Z-210813T0330Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service State College PA
1031 PM EDT Thu Aug 12 2021

The National Weather Service in State College PA has issued a

* Severe Thunderstorm Warning for...
  Schuylkill County in central Pennsylvania...
  Southeastern Northumberland County in central Pennsylvania...
  Northeastern Dauphin County in south central Pennsylvania...
  Southeastern Columbia County in central Pennsylvania...
  Northwestern Lebanon County in south central Pennsylvania...

* Until 1130 PM EDT.

* At 1031 PM EDT, severe thunderstorms were located along a line
  extending from near Aristes to near Fort Indiantown Gap, moving
  northeast at 55 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Pottsville, Colonial Park, Shamokin, Tamaqua, Linglestown, Mount
  Carmel, Schuylkill Haven, Shenandoah, Minersville, Mahanoy City,
  Frackville, St. Clair, Kulpmont, Ashland, Paxtonia, Skyline View,
  Orwigsburg, Valley View, Mcadoo and Pine Grove.

This includes the following Interstates...
 Interstate 78 from mile markers 0 to 8.
 Interstate 81 between mile markers 71 and 72...and from mile markers
75 to 139.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Large hail and damaging winds and continuous cloud to ground
lightning is occurring with these storms. Move indoors immediately.
Lightning is one of nature's leading killers. Remember, if you can
hear thunder, you are close enough to be struck by lightning.

Very heavy rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4070 7581 4064 7598 4057 7602 4058 7607
      4053 7617 4049 7644 4044 7636 4031 7685
      4086 7650 4096 7621 4095 7621 4090 7604
      4091 7600 4081 7589 4073 7576
TIME...MOT...LOC 0231Z 246DEG 47KT 4085 7631 4047 7661 

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

$$

Banghoff

4 follow-up statements

206 
WWUS51 KCTP 130246
SVSCTP

Severe Weather Statement
National Weather Service State College PA
1046 PM EDT Thu Aug 12 2021

PAC037-043-097-130256-
/O.CAN.KCTP.SV.W.0222.000000T0000Z-210813T0330Z/
Northumberland PA-Dauphin PA-Columbia PA-
1046 PM EDT Thu Aug 12 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN NORTHUMBERLAND...
NORTHEASTERN DAUPHIN AND SOUTHEASTERN COLUMBIA COUNTIES IS
CANCELLED...

The storms which prompted the warning have moved out of the warned 
area. Therefore, the warning has been cancelled.

LAT...LON 4064 7598 4057 7602 4058 7607 4053 7617
      4050 7643 4049 7644 4044 7636 4038 7664
      4048 7668 4056 7653 4078 7636 4081 7631
      4090 7627 4092 7611 4090 7604 4091 7600
      4081 7589 4073 7576
TIME...MOT...LOC 0246Z 261DEG 37KT 4083 7617 4045 7647 

$$

PAC075-107-130330-
/O.CON.KCTP.SV.W.0222.000000T0000Z-210813T0330Z/
Schuylkill PA-Lebanon PA-
1046 PM EDT Thu Aug 12 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1130 PM EDT
FOR SCHUYLKILL AND NORTHWESTERN LEBANON COUNTIES...

At 1046 PM EDT, severe thunderstorms were located along a line
extending from Mahanoy City to Lickdale, moving east at 45 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Pottsville, Tamaqua, Schuylkill Haven, Shenandoah, Minersville,
Mahanoy City, Frackville, St. Clair, Ashland, Orwigsburg, Mcadoo,
Pine Grove, Port Carbon, Tremont, Girardville, Fredericksburg,
Hometown, Tuscarora, New Philadelphia and Oneida.

This includes the following Interstates...
 Interstate 78 from mile markers 0 to 8.
 Interstate 81 from mile markers 82 to 139.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

To report severe weather contact your nearest law enforcement agency.
They will send your report to the National Weather Service office in
State College PA.

Continuous cloud to ground lightning is occurring with these storms.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.

Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4064 7598 4057 7602 4058 7607 4053 7617
      4050 7643 4049 7644 4044 7636 4038 7664
      4048 7668 4056 7653 4078 7636 4081 7631
      4090 7627 4092 7611 4090 7604 4091 7600
      4081 7589 4073 7576
TIME...MOT...LOC 0246Z 261DEG 37KT 4083 7617 4045 7647 

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

$$

Banghoff

774 
WWUS51 KCTP 130257
SVSCTP

Severe Weather Statement
National Weather Service State College PA
1057 PM EDT Thu Aug 12 2021

PAC075-130307-
/O.CAN.KCTP.SV.W.0222.000000T0000Z-210813T0330Z/
Lebanon PA-
1057 PM EDT Thu Aug 12 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN LEBANON COUNTY IS
CANCELLED...

The storms which prompted the warning have moved out of the warned 
area. Therefore, the warning has been cancelled.

LAT...LON 4050 7642 4082 7622 4088 7596 4081 7589
      4073 7576 4064 7598 4057 7602 4058 7607
      4053 7617
TIME...MOT...LOC 0257Z 254DEG 45KT 4077 7608 4052 7627 

$$

PAC107-130330-
/O.CON.KCTP.SV.W.0222.000000T0000Z-210813T0330Z/
Schuylkill PA-
1057 PM EDT Thu Aug 12 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1130 PM EDT
FOR CENTRAL SCHUYLKILL COUNTY...

At 1057 PM EDT, severe thunderstorms were located along a line
extending from near Tuscarora to near Strausstown, moving east at 50
mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Pottsville, Tamaqua, Schuylkill Haven, Shenandoah, Minersville,
Mahanoy City, Frackville, St. Clair, Orwigsburg, Pine Grove, Port
Carbon, Hometown, Tuscarora, New Philadelphia, Friedensburg, Grier
City-Park Crest, Marlin, Altamont, Renningers and Englewood.

This includes Interstate 81 from mile markers 123 to 135.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

To report severe weather contact your nearest law enforcement agency.
They will send your report to the National Weather Service office in
State College PA.

Continuous cloud to ground lightning is occurring with these storms.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.

Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4050 7642 4082 7622 4088 7596 4081 7589
      4073 7576 4064 7598 4057 7602 4058 7607
      4053 7617
TIME...MOT...LOC 0257Z 254DEG 45KT 4077 7608 4052 7627 

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

$$

Banghoff

079 
WWUS51 KCTP 130312
SVSCTP

Severe Weather Statement
National Weather Service State College PA
1112 PM EDT Thu Aug 12 2021

PAC107-130330-
/O.CON.KCTP.SV.W.0222.000000T0000Z-210813T0330Z/
Schuylkill PA-
1112 PM EDT Thu Aug 12 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1130 PM EDT
FOR EAST CENTRAL SCHUYLKILL COUNTY...

At 1112 PM EDT, severe thunderstorms were located along a line
extending from near Nesquehoning to Hamburg, moving east at 55 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Snyders.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

To report severe weather contact your nearest law enforcement agency.
They will send your report to the National Weather Service office in
State College PA.

Continuous cloud to ground lightning is occurring with these storms.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.

Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4064 7597 4083 7591 4081 7589 4073 7576
TIME...MOT...LOC 0312Z 249DEG 46KT 4084 7586 4055 7599 

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

$$

Banghoff

303 
WWUS51 KCTP 130320
SVSCTP

Severe Weather Statement
National Weather Service State College PA
1120 PM EDT Thu Aug 12 2021

PAC107-130330-
/O.EXP.KCTP.SV.W.0222.000000T0000Z-210813T0330Z/
Schuylkill PA-
1120 PM EDT Thu Aug 12 2021

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL SCHUYLKILL COUNTY
WILL EXPIRE AT 1130 PM EDT...
    
The storms which prompted the warning have weakened below severe
limits, and have exited the warned area. Therefore, the warning will
be allowed to expire.

LAT...LON 4064 7597 4083 7591 4081 7589 4073 7576
TIME...MOT...LOC 0320Z 246DEG 47KT 4088 7575 4059 7588 

$$

Banghoff

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 12, 8:05 PM EDT	Severe Thunderstorm Warning	CTP	Clinton, Lycoming, Sullivan, Tioga	40 min
Aug 12, 8:16 PM EDT	Special Weather Statement	CTP	Blair, Huntingdon, Mifflin	29 min
Aug 12, 8:28 PM EDT	Severe Thunderstorm Warning	CTP	Lycoming, Sullivan	47 min
Aug 12, 8:33 PM EDT	Special Weather Statement	CTP	Union	12 min
Aug 12, 8:42 PM EDT	Severe Thunderstorm Warning	CTP	Centre, Clinton, Lycoming, Mifflin, Union	48 min
Aug 12, 8:46 PM EDT	Special Weather Statement	CTP	Juniata, Mifflin, Perry, Snyder	29 min
Aug 12, 9:01 PM EDT	Severe Thunderstorm Warning	CTP	Columbia, Lycoming, Montour, Northumberland, Union	44 min
Aug 12, 9:14 PM EDT	Special Weather Statement	CTP	Sullivan	31 min
Aug 12, 9:23 PM EDT	Severe Thunderstorm Warning	CTP	Columbia, Montour, Northumberland, Snyder, Union	67 min
Aug 12, 9:25 PM EDT	Special Weather Statement	CTP	Perry	20 min
Aug 12, 9:44 PM EDT	Special Weather Statement	CTP	Dauphin	31 min
Aug 12, 9:59 PM EDT	Severe Thunderstorm Warning	CTP	Columbia, Dauphin, Lebanon, Northumberland, Perry, Schuylkill	31 min
Aug 12, 10:34 PM EDT	Special Weather Statement	CTP	Lebanon	26 min
Aug 12, 11:03 PM EDT	Special Weather Statement	CTP	Lebanon	27 min
Aug 12, 11:10 PM EDT	Severe Thunderstorm Warning	CTP	Dauphin, Lancaster, Lebanon, York	34 min
Aug 13, 1:49 PM EDT	Special Weather Statement	CTP	Cumberland, Franklin, Perry	41 min
Aug 13, 1:59 PM EDT	Special Weather Statement	CTP	Fulton	31 min
Aug 13, 2:12 PM EDT	Severe Thunderstorm Warning	CTP	Adams, Cumberland, Franklin, Fulton, Huntingdon, Juniata and 2 more	63 min
Aug 13, 2:17 PM EDT	Special Weather Statement	CTP	Cameron	28 min
Aug 13, 2:22 PM EDT	Special Weather Statement	CTP	Potter	38 min
Aug 13, 2:35 PM EDT	Special Weather Statement	CTP	Clinton	25 min
Aug 13, 2:59 PM EDT	Special Weather Statement	CTP	Clinton	31 min
Aug 13, 3:00 PM EDT	Special Weather Statement	CTP	Potter	30 min
Aug 13, 3:04 PM EDT	Special Weather Statement	CTP	Potter	26 min
Aug 13, 3:12 PM EDT	Severe Thunderstorm Warning	CTP	Adams, Franklin	63 min
Aug 13, 3:14 PM EDT	Severe Thunderstorm Warning	CTP	Cumberland, Perry	61 min
Aug 13, 3:22 PM EDT	Severe Thunderstorm Warning	CTP	Clinton, Lycoming	38 min
Aug 13, 3:26 PM EDT	Special Weather Statement	CTP	Dauphin	34 min
Aug 13, 3:35 PM EDT	Severe Thunderstorm Warning	CTP	York	40 min
Aug 13, 3:43 PM EDT	Severe Thunderstorm Warning	CTP	Dauphin, Juniata, Northumberland, Perry, Snyder	29 min
Aug 13, 3:43 PM EDT	Severe Thunderstorm Warning	CTP	Cumberland, Dauphin, Perry	47 min
Aug 13, 3:56 PM EDT	Areal Flood Advisory	CTP	Adams, Cumberland, Dauphin, Perry, York	2 hr
Aug 13, 3:57 PM EDT	Special Weather Statement	CTP	Lycoming	33 min
Aug 13, 4:07 PM EDT	Severe Thunderstorm Warning	CTP	Adams, Dauphin, Lancaster, Lebanon, York	53 min
Aug 13, 4:20 PM EDT	Special Weather Statement	CTP	Sullivan	25 min
Aug 13, 4:30 PM EDT	Severe Thunderstorm Warning	CTP	Columbia, Lycoming, Sullivan	60 min
Aug 13, 4:41 PM EDT	Special Weather Statement	CTP	Clinton	34 min
Aug 13, 4:59 PM EDT	Special Weather Statement	CTP	York	46 min
Aug 13, 5:14 PM EDT	Special Weather Statement	CTP	Montour	16 min
Aug 13, 5:29 PM EDT	Severe Thunderstorm Warning	CTP	Columbia, Lycoming, Sullivan	31 min
Aug 13, 5:38 PM EDT	Special Weather Statement	CTP	Snyder, Union	37 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.