Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 141, NWS State College, PA

July 13, 2021Cameron County, Clearfield County, Elk County, Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at Jul 13, 2021, 5:53 PM EDT for Cameron County, Clearfield County, Elk County, Pennsylvania. It was in force for 67 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 13, 2021, 5:53 PM EDT (21:53 UTC)
Expired: Jul 13, 2021, 7:00 PM EDT
In force: 67 min
Issued by: NWS State College, PA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Cameron County, PA, Clearfield County, PA, Elk County, PA

The radar

The State College radar (KCCX), 61 km from the middle of the area, began a volume at 21:55 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 13, 6:09 PM EDT	TSTM WND DMG	2 Nnw Clearfield, PA	TREES DOWN ACROSS ROAD.
Jul 13, 6:47 PM EDT	TSTM WND DMG	4 E Elk River, PA	4 TREES DOWN ON ROUTE 46 NEAR OLD NORTH CREEK RD.

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 13, 1:37 PM EDT	Severe Thunderstorm Watch	SPC	10 hr

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 9.9 hours before the alert went out and 170 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: 610 J/kg
Mixed-layer CIN: -36 J/kg
Mixed-layer LCL: 907 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 56 m²/s²
0-3 km storm-relative helicity: 90 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.9

Open this sounding in Storm Lab

The text

As transmitted.

103 
WUUS51 KCTP 132153
SVRCTP
PAC023-033-047-132300-
/O.NEW.KCTP.SV.W.0141.210713T2153Z-210713T2300Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service State College PA
553 PM EDT Tue Jul 13 2021

The National Weather Service in State College PA has issued a

* Severe Thunderstorm Warning for...
  Eastern Elk County in north central Pennsylvania...
  North central Clearfield County in central Pennsylvania...
  Cameron County in north central Pennsylvania...

* Until 700 PM EDT.

* At 553 PM EDT, a severe thunderstorm was located over
  Plymptonville, moving northeast at 40 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...
  Clearfield, Cameron, Emporium, Hyde, Plymptonville, Force,
  Benezette, Elk River, Hicks Run, Parker Dam State Park, S.B. Elliot
  State Park, Medix Run, Truman, Sizerville, Weedville, Driftwood and
  Clearfield-Lawrence Airport.

For those driving on Interstate 80, this includes areas between the
Penfield and Woodland exits, specifically from mile markers 111 to
121.

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 this storm. 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 this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4148 7806 4148 7805 4147 7804 4096 7842
      4101 7856 4160 7843 4160 7842 4162 7841
      4162 7820
TIME...MOT...LOC 2153Z 203DEG 37KT 4106 7847 

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

Banghoff

1 follow-up statement

704 
WWUS51 KCTP 132228
SVSCTP

Severe Weather Statement
National Weather Service State College PA
628 PM EDT Tue Jul 13 2021

PAC033-132238-
/O.CAN.KCTP.SV.W.0141.000000T0000Z-210713T2300Z/
Clearfield PA-
628 PM EDT Tue Jul 13 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL CLEARFIELD
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 4127 7819 4125 7850 4160 7843 4160 7842
      4162 7841 4162 7820 4148 7806 4148 7805
      4147 7804 4130 7817
TIME...MOT...LOC 2228Z 217DEG 23KT 4129 7843 

$$

PAC023-047-132300-
/O.CON.KCTP.SV.W.0141.000000T0000Z-210713T2300Z/
Elk PA-Cameron PA-
628 PM EDT Tue Jul 13 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM EDT
FOR EASTERN ELK AND CAMERON COUNTIES...

At 628 PM EDT, a severe thunderstorm was located over Medix Run,
moving northeast at 25 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...
Cameron, Emporium, Benezette, Medix Run, Truman, Elk River, Hicks
Run, Sizerville, Weedville and Driftwood.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Continuous cloud to ground lightning is occurring with this storm.
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 this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4127 7819 4125 7850 4160 7843 4160 7842
      4162 7841 4162 7820 4148 7806 4148 7805
      4147 7804 4130 7817
TIME...MOT...LOC 2228Z 217DEG 23KT 4129 7843 

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

Banghoff

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 12, 8:26 PM EDT	Areal Flood Advisory	CTP	Tioga	2 hr
Jul 12, 8:50 PM EDT	Areal Flood Advisory	CTP	Lycoming, Sullivan	2 hr
Jul 12, 9:47 PM EDT	Areal Flood Advisory	CTP	Sullivan	118 min
Jul 12, 11:21 PM EDT	Special Weather Statement	CTP	York	24 min
Jul 12, 11:52 PM EDT	Special Weather Statement	CTP	Adams, Lancaster, Lebanon, York	23 min
Jul 13, 12:53 AM EDT	Special Weather Statement	CTP	Lebanon	22 min
Jul 13, 1:31 AM EDT	Special Weather Statement	CTP	Schuylkill	29 min
Jul 13, 2:02 AM EDT	Special Weather Statement	CTP	Schuylkill	28 min
Jul 13, 12:39 PM EDT	Flash Flood Watch	CTP	Columbia, Lycoming, Montour, Northumberland, Snyder, Sullivan and 2 more	11 hr
Jul 13, 4:18 PM EDT	Special Weather Statement	CTP	Somerset	42 min
Jul 13, 4:31 PM EDT	Areal Flood Advisory	CTP	Tioga	119 min
Jul 13, 4:34 PM EDT	Severe Thunderstorm Warning	CTP	Somerset	41 min
Jul 13, 4:35 PM EDT	Severe Thunderstorm Warning	CTP	Warren	55 min
Jul 13, 4:38 PM EDT	Areal Flood Advisory	CTP	Somerset	3 hr
Jul 13, 5:14 PM EDT	Special Weather Statement	CTP	Somerset	46 min
Jul 13, 5:23 PM EDT	Severe Thunderstorm Warning	CTP	Elk, McKean, Warren	52 min
Jul 13, 5:35 PM EDT	Special Weather Statement	CTP	Clearfield	40 min
Jul 13, 5:38 PM EDT	Severe Thunderstorm Warning	CTP	Bedford, Somerset	41 min
Jul 13, 5:49 PM EDT	Severe Thunderstorm Warning	CTP	Cameron, Centre, Clearfield, Clinton, Potter	56 min
Jul 13, 5:56 PM EDT	Special Weather Statement	CTP	Clearfield	34 min
Jul 13, 6:01 PM EDT	Severe Thunderstorm Warning	CTP	Bedford, Blair, Cambria, Clearfield	59 min
Jul 13, 6:07 PM EDT	Severe Thunderstorm Warning	CTP	Clearfield, Elk	38 min
Jul 13, 6:19 PM EDT	Severe Thunderstorm Warning	CTP	McKean, Potter	41 min
Jul 13, 6:27 PM EDT	Severe Thunderstorm Warning	CTP	Somerset	37 min
Jul 13, 6:33 PM EDT	Special Weather Statement	CTP	Clearfield	27 min
Jul 13, 6:35 PM EDT	Special Weather Statement	CTP	Huntingdon	40 min
Jul 13, 6:43 PM EDT	Severe Thunderstorm Warning	CTP	Clinton, Potter, Tioga	47 min
Jul 13, 6:46 PM EDT	Severe Thunderstorm Warning	CTP	Blair, Centre, Clearfield	44 min
Jul 13, 6:46 PM EDT	Severe Thunderstorm Warning	CTP	Blair, Huntingdon	44 min
Jul 13, 6:54 PM EDT	Areal Flood Advisory	CTP	Cameron, Clearfield, Clinton	3 hr
Jul 13, 6:59 PM EDT	Severe Thunderstorm Warning	CTP	Potter	61 min
Jul 13, 7:01 PM EDT	Severe Thunderstorm Warning	CTP	Centre, Clinton	44 min
Jul 13, 7:07 PM EDT	Special Weather Statement	CTP	Clinton	23 min
Jul 13, 7:08 PM EDT	Special Weather Statement	CTP	Somerset	37 min
Jul 13, 7:16 PM EDT	Severe Thunderstorm Warning	CTP	Centre, Huntingdon, Mifflin	44 min
Jul 13, 7:26 PM EDT	Severe Thunderstorm Warning	CTP	Lycoming, Tioga	64 min
Jul 13, 7:29 PM EDT	Areal Flood Advisory	CTP	Centre, Clinton	3 hr
Jul 13, 7:44 PM EDT	Severe Thunderstorm Warning	CTP	Clinton, Lycoming, Tioga	61 min
Jul 13, 7:55 PM EDT	Flash Flood Warning	CTP	Lycoming, Tioga	2 hr
Jul 13, 7:58 PM EDT	Areal Flood Advisory	CTP	Centre, Clinton	2 hr
Jul 13, 7:59 PM EDT	Severe Thunderstorm Warning	CTP	Centre, Clinton, Mifflin, Snyder, Union	46 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.