Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 196, NWS State College, PA

August 11, 2021Bedford County, Blair County, Huntingdon County, Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at Aug 11, 2021, 3:13 PM EDT for Bedford County, Blair County, Huntingdon County, Pennsylvania. It was in force for 46 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: Aug 11, 2021, 3:13 PM EDT (19:13 UTC)
Expired: Aug 11, 2021, 3:59 PM EDT
In force: 46 min
Issued by: NWS State College, PA
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Bedford County, PA, Blair County, PA, Huntingdon County, PA

The radar

The State College radar (KCCX), 54 km from the middle of the area, began a volume at 19:13 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 11, 3:22 PM EDT	TSTM WND DMG	3 Ne Marklesburg, PA	TREES AND WIRES DOWN.
Aug 11, 3:24 PM EDT	TSTM WND DMG	4 S Alexandria, PA	MULTIPLE TREES AND WIRES DOWN IN THE AREA.
Aug 11, 3:40 PM EDT	TSTM WND DMG	1 S Mill Creek, PA	TREES AND WIRES DOWN.

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
Aug 11, 3:02 PM EDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 7.2 hours before the alert went out and 173 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: 553 J/kg
Mixed-layer CIN: -190 J/kg
Mixed-layer LCL: 1301 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: 20 m²/s²
0-3 km storm-relative helicity: 77 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

572 
WUUS51 KCTP 111913
SVRCTP
PAC009-013-061-112015-
/O.NEW.KCTP.SV.W.0196.210811T1913Z-210811T2015Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service State College PA
313 PM EDT Wed Aug 11 2021

The National Weather Service in State College PA has issued a

* Severe Thunderstorm Warning for...
  Northeastern Bedford County in south central Pennsylvania...
  Huntingdon County in central Pennsylvania...
  Southeastern Blair County in central Pennsylvania...

* Until 415 PM EDT.

* At 313 PM EDT, severe thunderstorms were located along a line
  extending from near Rock Springs to near New Enterprise, moving
  east at 25 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Huntingdon, Martinsburg, Warriors Mark, Williamsburg, Spruce Creek,
  Dudley, Franklinville, Whipple Dam State Park, Raystown Dam,
  Entriken, Royer, Mcalevys Fort, Shy Beaver, Trough Creek State
  Park, McConnellstown, Saxton, Petersburg, Broad Top City, Three
  Springs and Mapleton.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

If on or near Raystown Lake, get away from the water and move 
indoors or inside a vehicle. Remember, lightning can strike out to 
15 miles from the parent thunderstorm. If you can hear thunder, you 
are close enough to be struck by lightning. Move to safe shelter 
now!  Do not be caught on the water in a thunderstorm.

&&

LAT...LON 4016 7813 4016 7814 4022 7841 4074 7811
      4069 7794 4072 7789 4070 7774 4061 7778
      4055 7784 4052 7783 4045 7786 4041 7791
      4040 7789 4013 7802
TIME...MOT...LOC 1913Z 290DEG 20KT 4071 7803 4021 7834 

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

$$

Colbert

3 follow-up statements

957 
WUUS51 KCTP 111921 CCA
SVRCTP
PAC009-013-061-112030-
/O.COR.KCTP.SV.W.0196.210811T1913Z-210811T2015Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service State College PA
321 PM EDT Wed Aug 11 2021

The National Weather Service in State College PA has issued a

* Severe Thunderstorm Warning for...
  Northeastern Bedford County in south central Pennsylvania...
  Huntingdon County in central Pennsylvania...
  Southeastern Blair County in central Pennsylvania...

* Until 415 PM EDT.

* At 320 PM EDT, severe thunderstorms were located along a line
  extending from near Rock Springs to near New Enterprise, moving
  east at 25 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Huntingdon, Martinsburg, Warriors Mark, Williamsburg, Spruce Creek,
  Dudley, Franklinville, Whipple Dam State Park, Raystown Dam,
  Entriken, Royer, Mcalevys Fort, Shy Beaver, Trough Creek State
  Park, McConnellstown, Saxton, Petersburg, Broad Top City, Three
  Springs and Mapleton.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Wind damage with these storms may occur before any rain or 
lightning. Do not wait for the sound of thunder before taking cover.
SEEK SHELTER IMMEDIATELY inside a sturdy structure and stay away from
windows.

If on or near Raystown Lake, get away from the water and move 
indoors or inside a vehicle. Remember, lightning can strike out to 
15 miles from the parent thunderstorm. If you can hear thunder, you 
are close enough to be struck by lightning. Move to safe shelter 
now!  Do not be caught on the water in a thunderstorm.

&&

LAT...LON 4016 7813 4016 7814 4022 7841 4074 7811
      4069 7794 4072 7789 4070 7774 4061 7778
      4055 7784 4052 7783 4045 7786 4041 7791
      4040 7789 4013 7802
TIME...MOT...LOC 1920Z 290DEG 20KT 4071 7803 4021 7834 

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

$$

Colbert

493 
WWUS51 KCTP 111943
SVSCTP

Severe Weather Statement
National Weather Service State College PA
343 PM EDT Wed Aug 11 2021

PAC009-013-111953-
/O.CAN.KCTP.SV.W.0196.000000T0000Z-210811T2015Z/
Bedford PA-Blair PA-
343 PM EDT Wed Aug 11 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN BEDFORD AND
SOUTHEASTERN BLAIR COUNTIES IS CANCELLED...

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

A Severe Thunderstorm Watch remains in effect until 900 PM EDT for
central Pennsylvania.

LAT...LON 4016 7812 4020 7819 4070 7797 4066 7776
      4065 7776 4055 7784 4051 7783 4046 7785
      4041 7791 4040 7791 4040 7789 4015 7801
      4013 7803
TIME...MOT...LOC 1943Z 284DEG 23KT 4067 7788 4018 7812 

$$

PAC061-112015-
/O.CON.KCTP.SV.W.0196.000000T0000Z-210811T2015Z/
Huntingdon PA-
343 PM EDT Wed Aug 11 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 415 PM EDT
FOR CENTRAL HUNTINGDON COUNTY...

At 343 PM EDT, severe thunderstorms were located along a line
extending from Whipple Dam State Park to near Dudley, moving east at
25 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Huntingdon, Dudley, Mcalevys Fort, Raystown Dam, Trough Creek State
Park, McConnellstown, Broad Top City, Three Springs, Mapleton,
Saltillo, Mill Creek, Cassville and Juniata College.

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.

If on or near Raystown Lake, get away from the water and move 
indoors or inside a vehicle. remember, lightning can strike out to 
15 miles from the parent thunderstorm. If you can hear thunder, you 
are close enough to be struck by lightning. Move to safe shelter 
now!  Do not be caught on the water in a thunderstorm.

&&

LAT...LON 4016 7812 4020 7819 4070 7797 4066 7776
      4065 7776 4055 7784 4051 7783 4046 7785
      4041 7791 4040 7791 4040 7789 4015 7801
      4013 7803
TIME...MOT...LOC 1943Z 284DEG 23KT 4067 7788 4018 7812 

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

$$

Banghoff

608 
WWUS51 KCTP 111959
SVSCTP

Severe Weather Statement
National Weather Service State College PA
359 PM EDT Wed Aug 11 2021

PAC061-112009-
/O.CAN.KCTP.SV.W.0196.000000T0000Z-210811T2015Z/
Huntingdon PA-
359 PM EDT Wed Aug 11 2021

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL HUNTINGDON COUNTY IS
CANCELLED...
    
The storms which prompted the warning have moved out of the area.
Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 900 PM EDT for
central Pennsylvania.

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

LAT...LON 4016 7812 4020 7819 4070 7797 4066 7776
      4065 7776 4055 7784 4051 7783 4046 7785
      4041 7791 4040 7791 4040 7789 4015 7801
      4013 7803
TIME...MOT...LOC 1957Z 290DEG 20KT 4064 7778 4015 7802 

$$

Banghoff

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 11, 12:18 AM EDT	Special Weather Statement	CTP	Union	27 min
Aug 11, 3:38 AM EDT	Excessive Heat Warning	CTP	Adams, Columbia, Cumberland, Dauphin, Franklin, Juniata and 10 more	39 hr
Aug 11, 5:03 AM EDT	Special Weather Statement	CTP	Warren	27 min
Aug 11, 6:40 AM EDT	Special Weather Statement	CTP	McKean	50 min
Aug 11, 2:11 PM EDT	Special Weather Statement	CTP	Cambria	49 min
Aug 11, 2:32 PM EDT	Severe Thunderstorm Warning	CTP	Dauphin, Lancaster, Lebanon, York	58 min
Aug 11, 2:59 PM EDT	Special Weather Statement	CTP	Somerset	61 min
Aug 11, 3:02 PM EDT	Special Weather Statement	CTP	Blair	28 min
Aug 11, 3:28 PM EDT	Severe Thunderstorm Warning	CTP	Centre, Huntingdon, Mifflin	62 min
Aug 11, 3:34 PM EDT	Severe Thunderstorm Warning	CTP	Mifflin	41 min
Aug 11, 3:35 PM EDT	Special Weather Statement	CTP	Huntingdon	25 min
Aug 11, 3:49 PM EDT	Special Weather Statement	CTP	Juniata	26 min
Aug 11, 3:55 PM EDT	Special Weather Statement	CTP	Dauphin	35 min
Aug 11, 4:07 PM EDT	Special Weather Statement	CTP	York	38 min
Aug 11, 4:08 PM EDT	Special Weather Statement	CTP	Franklin	37 min
Aug 11, 4:13 PM EDT	Special Weather Statement	CTP	Juniata, Perry, Snyder, Union	32 min
Aug 11, 4:23 PM EDT	Severe Thunderstorm Warning	CTP	Centre, Snyder, Union	59 min
Aug 11, 4:37 PM EDT	Severe Thunderstorm Warning	CTP	Dauphin	53 min
Aug 11, 4:42 PM EDT	Special Weather Statement	CTP	York	33 min
Aug 11, 4:43 PM EDT	Special Weather Statement	CTP	Cumberland	32 min
Aug 11, 4:47 PM EDT	Severe Thunderstorm Warning	CTP	Dauphin, Juniata, Northumberland, Perry, Snyder	53 min
Aug 11, 4:52 PM EDT	Areal Flood Advisory	CTP	Dauphin	2 hr
Aug 11, 4:54 PM EDT	Special Weather Statement	CTP	Lebanon	36 min
Aug 11, 5:00 PM EDT	Flash Flood Warning Considerable damage threat	CTP	Cumberland, Dauphin, York	85 min
Aug 11, 5:00 PM EDT	Special Weather Statement	CTP	York	30 min
Aug 11, 5:08 PM EDT	Severe Thunderstorm Warning	CTP	Columbia, Montour, Northumberland	52 min
Aug 11, 5:14 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster	46 min
Aug 11, 5:35 PM EDT	Severe Thunderstorm Warning	CTP	Columbia, Northumberland	48 min
Aug 11, 5:44 PM EDT	Areal Flood Advisory	CTP	Lancaster, Lebanon	2 hr
Aug 11, 5:47 PM EDT	Special Weather Statement	CTP	Lancaster, York	58 min
Aug 11, 5:54 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster, York	51 min
Aug 11, 5:58 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster	47 min
Aug 11, 6:25 PM EDT	Areal Flood Advisory	CTP	Cumberland, Dauphin, York	95 min
Aug 11, 7:14 PM EDT	Special Weather Statement	CTP	Warren	31 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.