Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 214, NWS State College, PA

August 12, 2021Clearfield County, Elk County, Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at Aug 12, 2021, 7:07 PM EDT for Clearfield County, Elk County, Pennsylvania. It was in force for 53 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 12, 2021, 7:07 PM EDT (23:07 UTC)
Expired: Aug 12, 2021, 8:00 PM EDT
In force: 53 min
Issued by: NWS State College, PA
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Clearfield County, PA, Elk County, PA

The radar

The State College radar (KCCX), 53 km from the middle of the area, began a volume at 23:08 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, 7:32 PM EDT	TSTM WND DMG	1 Wsw Hepburnia, PA	TREES ACROSS ROAD
Aug 12, 7:40 PM EDT	TSTM WND DMG	1 N New Millport, PA	TREES AND WIRES DOWN
Aug 12, 7:45 PM EDT	TSTM WND DMG	2 W Plymptonville, PA	TREES 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 12, 1:11 PM EDT	Severe Thunderstorm Watch	SPC	9 hr

The nearest sounding before it

Pittsburgh, PA (KPIT), launched 12:00Z, 11.1 hours before the alert went out and 156 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: 1075 J/kg
Mixed-layer CIN: -107 J/kg
Mixed-layer LCL: 890 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 163 m²/s²
0-3 km storm-relative helicity: 129 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.8

Open this sounding in Storm Lab

The text

As transmitted.

390 
WUUS51 KCTP 122307
SVRCTP
PAC033-047-130000-
/O.NEW.KCTP.SV.W.0214.210812T2307Z-210813T0000Z/

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

The National Weather Service in State College PA has issued a

* Severe Thunderstorm Warning for...
  Southern Elk County in north central Pennsylvania...
  Clearfield County in central Pennsylvania...

* Until 800 PM EDT.

* At 707 PM EDT, severe thunderstorms were located along a line
  extending from 7 miles west of Portland Mills to Reynoldsville to
  Punxsutawney, moving east at 45 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  St. Marys, DuBois, Clearfield, Ridgway, Sandy, Woodland,
  Curwensville, Penfield, Hyde, Plymptonville, Rockton, Houtzdale,
  Force, Benezette, Jeffries, Lecontes Mills, S.B. Elliot State Park,
  Medix Run, Portland Mills and Brandy Camp.

For those driving on Interstate 80, this includes areas between the
Dubois and Kylertown exits, specifically from mile markers 97 to 128.

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.

&&

LAT...LON 4154 7842 4141 7842 4140 7826 4123 7824
      4122 7817 4081 7832 4076 7837 4073 7837
      4073 7880 4114 7880 4120 7877 4120 7871
      4123 7871 4123 7874 4126 7874 4137 7896
TIME...MOT...LOC 2307Z 251DEG 38KT 4137 7897 4111 7888 4095 7896 

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

$$

Banghoff

2 follow-up statements

981 
WWUS51 KCTP 122335
SVSCTP

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

PAC047-122345-
/O.CAN.KCTP.SV.W.0214.000000T0000Z-210813T0000Z/
Elk PA-
735 PM EDT Thu Aug 12 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN ELK COUNTY 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 1000 PM EDT for
central Pennsylvania.

LAT...LON 4075 7880 4097 7865 4117 7873 4121 7817
      4081 7832 4076 7837 4073 7837 4073 7880
TIME...MOT...LOC 2335Z 273DEG 44KT 4114 7857 4097 7841 4078 7862 

$$

PAC033-130000-
/O.CON.KCTP.SV.W.0214.000000T0000Z-210813T0000Z/
Clearfield PA-
735 PM EDT Thu Aug 12 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 800 PM EDT
FOR CLEARFIELD COUNTY...

At 735 PM EDT, severe thunderstorms were located along a line
extending from near S.B. Elliot State Park to near Hyde to 8 miles
northwest of Prince Gallitzin State Park, moving east at 50 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Clearfield, Woodland, Curwensville, Hyde, Plymptonville, Rockton,
Houtzdale, Jeffries, Lecontes Mills, S.B. Elliot State Park, Irvona,
West Decatur, Coalport, Ramey, Brisbin, Westover, Mahaffey, Grampian,
Wallaceton and Glen Hope.

For those driving on Interstate 80, this includes areas between the
Dubois Route 255 and Kylertown exits, specifically from mile markers
101 to 128.

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.

&&

LAT...LON 4075 7880 4097 7865 4117 7873 4121 7817
      4081 7832 4076 7837 4073 7837 4073 7880
TIME...MOT...LOC 2335Z 273DEG 44KT 4114 7857 4097 7841 4078 7862 

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

$$

Banghoff

357 
WWUS51 KCTP 122359
SVSCTP

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

PAC033-130009-
/O.EXP.KCTP.SV.W.0214.000000T0000Z-210813T0000Z/
Clearfield PA-
759 PM EDT Thu Aug 12 2021

...THE SEVERE THUNDERSTORM WARNING FOR CLEARFIELD COUNTY WILL EXPIRE
AT 800 PM EDT...
    
The storms which prompted the warning have moved out of the area.
Therefore, the warning will be allowed to expire.  However gusty
winds and heavy rain are still possible with these thunderstorms.

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

Remember, a Severe Thunderstorm Warning still remains in effect for 
far eastern Clearfield County.

LAT...LON 4075 7880 4097 7865 4117 7873 4121 7817
      4081 7832 4076 7837 4073 7837 4073 7880
TIME...MOT...LOC 2359Z 251DEG 38KT 4122 7827 4105 7811 4086 7832 

$$

Banghoff

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 12, 3:33 AM EDT	Excessive Heat Warning	CTP	Adams, Dauphin, Lancaster, Lebanon, York	39 hr
Aug 12, 3:33 AM EDT	Heat Advisory	CTP	Columbia, Cumberland, Franklin, Fulton, Huntingdon, Juniata and 8 more	39 hr
Aug 12, 12:38 PM EDT	Special Weather Statement	CTP	Tioga	52 min
Aug 12, 12:51 PM EDT	Severe Thunderstorm Warning	CTP	Clinton, Lycoming, Potter, Tioga	54 min
Aug 12, 1:27 PM EDT	Severe Thunderstorm Warning	CTP	Lycoming, Sullivan	63 min
Aug 12, 1:43 PM EDT	Severe Thunderstorm Warning	CTP	Clearfield	49 min
Aug 12, 1:47 PM EDT	Severe Thunderstorm Warning	CTP	Clinton, Lycoming	58 min
Aug 12, 2:15 PM EDT	Special Weather Statement	CTP	Columbia	30 min
Aug 12, 2:25 PM EDT	Special Weather Statement	CTP	Lycoming	20 min
Aug 12, 2:50 PM EDT	Special Weather Statement	CTP	Columbia, Montour	25 min
Aug 12, 3:19 PM EDT	Special Weather Statement	CTP	Schuylkill	41 min
Aug 12, 5:12 PM EDT	Severe Thunderstorm Warning	CTP	Warren	48 min
Aug 12, 5:27 PM EDT	Special Weather Statement	CTP	Tioga	33 min
Aug 12, 5:46 PM EDT	Severe Thunderstorm Warning	CTP	Clearfield, Elk	44 min
Aug 12, 6:25 PM EDT	Areal Flood Advisory	CTP	Clearfield, Elk	2 hr
Aug 12, 6:25 PM EDT	Severe Thunderstorm Warning	CTP	Clearfield	65 min
Aug 12, 7:33 PM EDT	Special Weather Statement	CTP	Blair, Cambria	27 min
Aug 12, 7:47 PM EDT	Special Weather Statement	CTP	Centre	28 min
Aug 12, 7:56 PM EDT	Severe Thunderstorm Warning	CTP	Centre, Clearfield	49 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.