Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 79, NWS State College, PA

July 7, 2021McKean County, Warren County, Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at Jul 7, 2021, 5:07 PM EDT for McKean County, Warren County, Pennsylvania. It was in force for 53 min. 2 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 7, 2021, 5:07 PM EDT (21:07 UTC)
Expired: Jul 7, 2021, 6:00 PM EDT
In force: 53 min
Issued by: NWS State College, PA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties McKean County, PA, Warren County, PA

The radar

The Buffalo radar (KBUF), 118 km from the middle of the area, began a volume at 21:06 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 7, 5:54 PM EDT	TSTM WND DMG	1 N Lewis Run, PA	TREES DOWN ON WIRES NORTH OF LEWIS RUN.
Jul 7, 5:54 PM EDT	TSTM WND DMG	1 N Lewis Run, PA

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 7, 3:31 PM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 9.1 hours before the alert went out and 116 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: 161 J/kg
Mixed-layer CIN: -85 J/kg
Mixed-layer LCL: 734 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 81 m²/s²
0-3 km storm-relative helicity: 117 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

As transmitted.

757 
WUUS51 KCTP 072107
SVRCTP
PAC083-123-072200-
/O.NEW.KCTP.SV.W.0079.210707T2107Z-210707T2200Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service State College PA
507 PM EDT Wed Jul 7 2021

The National Weather Service in State College PA has issued a

* Severe Thunderstorm Warning for...
  Northeastern Warren County in north central Pennsylvania...
  Northwestern McKean County in north central Pennsylvania...

* Until 600 PM EDT.

* At 506 PM EDT, a severe thunderstorm was located over Scandia,
  moving east at 15 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.

* Locations impacted include...
  Bradford, Scandia, Marshburg, Kinzua Dam, Lewis Run, University Of
  Pittsburgh - Bradford and Bradford Airport.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4177 7865 4185 7907 4195 7906 4200 7872
      4200 7865
TIME...MOT...LOC 2106Z 271DEG 15KT 4189 7899 

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

Banghoff

2 follow-up statements

073 
WWUS51 KCTP 072130
SVSCTP

Severe Weather Statement
National Weather Service State College PA
530 PM EDT Wed Jul 7 2021

PAC123-072140-
/O.CAN.KCTP.SV.W.0079.000000T0000Z-210707T2200Z/
Warren PA-
530 PM EDT Wed Jul 7 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN WARREN 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 1100 PM EDT for
north central Pennsylvania.

LAT...LON 4200 7865 4177 7865 4183 7895 4183 7892
      4197 7892 4200 7872
TIME...MOT...LOC 2130Z 271DEG 15KT 4189 7886 

$$

PAC083-072200-
/O.CON.KCTP.SV.W.0079.000000T0000Z-210707T2200Z/
McKean PA-
530 PM EDT Wed Jul 7 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM EDT
FOR NORTHWESTERN MCKEAN COUNTY...

At 530 PM EDT, a severe thunderstorm was located near Marshburg,
moving east at 15 mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Law enforcement has reported trees down in eastern Warren 
         County.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
Bradford, Marshburg, Lewis Run, University Of Pittsburgh - Bradford
and Bradford Airport.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4200 7865 4177 7865 4183 7895 4183 7892
      4197 7892 4200 7872
TIME...MOT...LOC 2130Z 271DEG 15KT 4189 7886 

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

Banghoff

089 
WWUS51 KCTP 072156
SVSCTP

Severe Weather Statement
National Weather Service State College PA
556 PM EDT Wed Jul 7 2021

PAC083-072205-
/O.EXP.KCTP.SV.W.0079.000000T0000Z-210707T2200Z/
McKean PA-
556 PM EDT Wed Jul 7 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN MCKEAN COUNTY
WILL EXPIRE AT 600 PM EDT...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire.

A Severe Thunderstorm Watch remains in effect until 1100 PM EDT for
north 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.

Remember, a Severe Thunderstorm Warning still remains in effect for
central and eastern McKean County including Bradford until 7PM.

LAT...LON 4200 7865 4177 7865 4183 7895 4183 7892
      4197 7892 4200 7872
TIME...MOT...LOC 2155Z 271DEG 15KT 4189 7872 

$$

Banghoff

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 7, 3:35 PM EDT	Special Weather Statement	CTP	Fulton	40 min
Jul 7, 4:00 PM EDT	Special Weather Statement	CTP	Warren	45 min
Jul 7, 4:05 PM EDT	Special Weather Statement	CTP	Somerset	25 min
Jul 7, 4:12 PM EDT	Special Weather Statement	CTP	Somerset	33 min
Jul 7, 4:12 PM EDT	Severe Thunderstorm Warning	CTP	Cambria, Somerset	47 min
Jul 7, 4:22 PM EDT	Severe Thunderstorm Warning	CTP	Bedford, Somerset	38 min
Jul 7, 4:44 PM EDT	Severe Thunderstorm Warning	CTP	Cambria	61 min
Jul 7, 4:46 PM EDT	Special Weather Statement	CTP	Warren	29 min
Jul 7, 4:48 PM EDT	Special Weather Statement	CTP	Bedford	27 min
Jul 7, 4:54 PM EDT	Severe Thunderstorm Warning	CTP	Bedford, Somerset	51 min
Jul 7, 4:59 PM EDT	Special Weather Statement	CTP	Warren	31 min
Jul 7, 5:12 PM EDT	Special Weather Statement	CTP	Blair	33 min
Jul 7, 5:19 PM EDT	Severe Thunderstorm Warning	CTP	Blair	41 min
Jul 7, 5:23 PM EDT	Severe Thunderstorm Warning	CTP	Bedford	37 min
Jul 7, 5:27 PM EDT	Special Weather Statement	CTP	Clearfield	33 min
Jul 7, 5:35 PM EDT	Severe Thunderstorm Warning	CTP	Blair	25 min
Jul 7, 5:38 PM EDT	Special Weather Statement	CTP	Warren	37 min
Jul 7, 5:42 PM EDT	Special Weather Statement	CTP	Cumberland	33 min
Jul 7, 5:48 PM EDT	Severe Thunderstorm Warning	CTP	Blair, Huntingdon	57 min
Jul 7, 5:50 PM EDT	Severe Thunderstorm Warning	CTP	Cumberland, Franklin	40 min
Jul 7, 5:55 PM EDT	Severe Thunderstorm Warning	CTP	McKean	65 min
Jul 7, 6:00 PM EDT	Special Weather Statement	CTP	Elk	30 min
Jul 7, 6:12 PM EDT	Severe Thunderstorm Warning	CTP	Centre, Clearfield, Huntingdon	48 min
Jul 7, 6:22 PM EDT	Special Weather Statement	CTP	Mifflin	23 min
Jul 7, 6:29 PM EDT	Severe Thunderstorm Warning	CTP	Warren	61 min
Jul 7, 6:36 PM EDT	Severe Thunderstorm Warning	CTP	Centre, Clearfield, Clinton, Mifflin	39 min
Jul 7, 6:37 PM EDT	Severe Thunderstorm Warning	CTP	Cumberland, Franklin, Perry	37 min
Jul 7, 6:43 PM EDT	Severe Thunderstorm Warning	CTP	McKean, Potter	77 min
Jul 7, 6:56 PM EDT	Severe Thunderstorm Warning	CTP	Centre, Clinton, Mifflin, Snyder, Union	49 min
Jul 7, 7:09 PM EDT	Severe Thunderstorm Warning	CTP	Juniata, Mifflin, Snyder	36 min
Jul 7, 7:19 PM EDT	Areal Flood Advisory	CTP	Warren	116 min
Jul 7, 7:31 PM EDT	Severe Thunderstorm Warning	CTP	Clinton, Lycoming, Montour, Northumberland, Union	44 min
Jul 7, 7:44 PM EDT	Areal Flood Advisory	CTP	McKean, Potter	2 hr
Jul 7, 7:48 PM EDT	Special Weather Statement	CTP	Bedford	27 min
Jul 7, 7:50 PM EDT	Special Weather Statement	CTP	Tioga	10 min
Jul 7, 7:51 PM EDT	Special Weather Statement	CTP	Potter	24 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.