Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 46, NWS State College, PA

June 21, 2021McKean County, Potter County, Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at Jun 21, 2021, 3:09 PM EDT for McKean County, Potter County, Pennsylvania. It was in force for 21 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: Jun 21, 2021, 3:09 PM EDT (19:09 UTC)
Expired: Jun 21, 2021, 3:30 PM EDT
In force: 21 min
Issued by: NWS State College, PA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties McKean County, PA, Potter County, PA

The radar

The State College radar (KCCX), 116 km from the middle of the area, began a volume at 19:11 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jun 21, 12:31 PM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 7.2 hours before the alert went out and 119 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: 9 J/kg
Mixed-layer CIN: -284 J/kg
Mixed-layer LCL: 1192 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 257 m²/s²
0-3 km storm-relative helicity: 304 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

646 
WUUS51 KCTP 211909
SVRCTP
PAC083-105-211945-
/O.NEW.KCTP.SV.W.0046.210621T1909Z-210621T1945Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service State College PA
309 PM EDT Mon Jun 21 2021

The National Weather Service in State College PA has issued a

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

* Until 345 PM EDT.

* At 309 PM EDT, a severe thunderstorm was located over Shinglehouse,
  moving east at 35 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...
  Shinglehouse and Oswayo. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4200 7790 4193 7791 4191 7830 4200 7833
TIME...MOT...LOC 1909Z 250DEG 31KT 4196 7824 

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

JCG

2 follow-up statements

525 
WWUS51 KCTP 211917
SVSCTP

Severe Weather Statement
National Weather Service State College PA
317 PM EDT Mon Jun 21 2021

PAC083-211926-
/O.CAN.KCTP.SV.W.0046.000000T0000Z-210621T1945Z/
McKean PA-
317 PM EDT Mon Jun 21 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN MCKEAN 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 800 PM EDT for
north central Pennsylvania.

LAT...LON 4200 7790 4193 7791 4191 7821 4199 7821
      4200 7820
TIME...MOT...LOC 1916Z 250DEG 31KT 4198 7815 

$$

PAC105-211945-
/O.CON.KCTP.SV.W.0046.000000T0000Z-210621T1945Z/
Potter PA-
317 PM EDT Mon Jun 21 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 345 PM EDT
FOR NORTHWESTERN POTTER COUNTY...

At 316 PM EDT, a severe thunderstorm was located just east of 
Shinglehouse, moving east at 35 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...
Shinglehouse and Oswayo. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4200 7790 4193 7791 4191 7821 4199 7821
      4200 7820
TIME...MOT...LOC 1916Z 250DEG 31KT 4198 7815 

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

JCG

683 
WWUS51 KCTP 211930
SVSCTP

Severe Weather Statement
National Weather Service State College PA
330 PM EDT Mon Jun 21 2021

PAC105-211940-
/O.CAN.KCTP.SV.W.0046.000000T0000Z-210621T1945Z/
Potter PA-
330 PM EDT Mon Jun 21 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN POTTER COUNTY IS
CANCELLED...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 800 PM EDT for
north central Pennsylvania.

LAT...LON 4200 7790 4193 7791 4191 7821 4199 7821
      4200 7820
TIME...MOT...LOC 1928Z 250DEG 31KT 4202 7799 

$$

JCG

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 20, 8:03 PM EDT	Special Weather Statement	CTP	Juniata	12 min
Jun 20, 8:13 PM EDT	Severe Thunderstorm Warning	CTP	Juniata, Snyder	24 min
Jun 20, 8:29 PM EDT	Special Weather Statement	CTP	Dauphin	16 min
Jun 20, 8:35 PM EDT	Special Weather Statement	CTP	McKean	25 min
Jun 20, 8:47 PM EDT	Special Weather Statement	CTP	Dauphin	13 min
Jun 20, 9:02 PM EDT	Special Weather Statement	CTP	Dauphin	13 min
Jun 20, 9:16 PM EDT	Special Weather Statement	CTP	Schuylkill	14 min
Jun 20, 9:23 PM EDT	Severe Thunderstorm Warning	CTP	Columbia, Northumberland, Schuylkill	50 min
Jun 20, 9:29 PM EDT	Areal Flood Advisory	CTP	Lebanon, Schuylkill	2 hr
Jun 21, 4:18 AM EDT	Special Weather Statement	CTP	Warren	42 min
Jun 21, 2:19 PM EDT	Special Weather Statement	CTP	Warren	41 min
Jun 21, 2:43 PM EDT	Severe Thunderstorm Warning	CTP	McKean, Warren	47 min
Jun 21, 2:55 PM EDT	Special Weather Statement	CTP	McKean	35 min
Jun 21, 3:14 PM EDT	Severe Thunderstorm Warning	CTP	McKean	31 min
Jun 21, 3:20 PM EDT	Special Weather Statement	CTP	Clearfield	25 min
Jun 21, 3:26 PM EDT	Severe Thunderstorm Warning	CTP	Cameron, Elk, McKean, Warren	49 min
Jun 21, 3:35 PM EDT	Special Weather Statement	CTP	Centre	25 min
Jun 21, 3:55 PM EDT	Special Weather Statement	CTP	Tioga	35 min
Jun 21, 3:58 PM EDT	Special Weather Statement	CTP	Snyder	32 min
Jun 21, 4:15 PM EDT	Special Weather Statement	CTP	Cameron, Potter	45 min
Jun 21, 4:17 PM EDT	Special Weather Statement	CTP	Cambria	28 min
Jun 21, 4:18 PM EDT	Special Weather Statement	CTP	Sullivan	27 min
Jun 21, 4:18 PM EDT	Special Weather Statement	CTP	Franklin	27 min
Jun 21, 4:21 PM EDT	Special Weather Statement	CTP	Union	24 min
Jun 21, 4:24 PM EDT	Special Weather Statement	CTP	Centre	21 min
Jun 21, 4:28 PM EDT	Severe Thunderstorm Warning	CTP	Cambria	47 min
Jun 21, 4:31 PM EDT	Special Weather Statement	CTP	Lycoming	44 min
Jun 21, 4:31 PM EDT	Severe Thunderstorm Warning	CTP	Adams, Franklin	59 min
Jun 21, 4:39 PM EDT	Severe Thunderstorm Warning	CTP	Cambria, Somerset	36 min
Jun 21, 4:43 PM EDT	Severe Thunderstorm Warning	CTP	Centre	32 min
Jun 21, 4:45 PM EDT	Severe Thunderstorm Warning	CTP	Lycoming, Sullivan, Tioga	30 min
Jun 21, 4:52 PM EDT	Special Weather Statement	CTP	Clinton	23 min
Jun 21, 4:55 PM EDT	Special Weather Statement	CTP	Blair	20 min
Jun 21, 4:56 PM EDT	Special Weather Statement	CTP	Sullivan	19 min
Jun 21, 5:05 PM EDT	Severe Thunderstorm Warning	CTP	Adams, Cumberland, York	40 min
Jun 21, 5:08 PM EDT	Severe Thunderstorm Warning	CTP	Centre, Clinton, Lycoming	37 min
Jun 21, 5:13 PM EDT	Special Weather Statement	CTP	Bedford, Blair	32 min
Jun 21, 5:31 PM EDT	Severe Thunderstorm Warning	CTP	Lycoming, Sullivan, Tioga	44 min
Jun 21, 5:41 PM EDT	Severe Thunderstorm Warning	CTP	York	34 min
Jun 21, 5:45 PM EDT	Special Weather Statement	CTP	Montour	45 min
Jun 21, 5:52 PM EDT	Special Weather Statement	CTP	Columbia, Northumberland	23 min
Jun 21, 5:58 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster	47 min
Jun 21, 6:02 PM EDT	Special Weather Statement	CTP	Dauphin	28 min
Jun 21, 6:08 PM EDT	Special Weather Statement	CTP	Sullivan	37 min
Jun 21, 6:15 PM EDT	Severe Thunderstorm Warning	CTP	Sullivan	15 min
Jun 21, 6:20 PM EDT	Special Weather Statement	CTP	Schuylkill	25 min
Jun 21, 6:23 PM EDT	Special Weather Statement	CTP	Schuylkill	37 min
Jun 21, 6:49 PM EDT	Special Weather Statement	CTP	Schuylkill	26 min
Jun 21, 7:00 PM EDT	Special Weather Statement	CTP	Somerset	15 min
Jun 21, 7:12 PM EDT	Special Weather Statement	CTP	Carbon	18 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.