Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 37, NWS State College, PA

June 14, 2021Cameron County, Clearfield County, Elk County, Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at Jun 14, 2021, 12:47 PM EDT for Cameron County, Clearfield County, Elk County, Pennsylvania. It was in force for 73 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: Jun 14, 2021, 12:47 PM EDT (16:47 UTC)
Expired: Jun 14, 2021, 2:00 PM EDT
In force: 73 min
Issued by: NWS State College, PA
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

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

The radar

The State College radar (KCCX), 46 km from the middle of the area, began a volume at 16:49 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
Jun 14, 12:50 PM EDT	TSTM WND DMG	1 Ssw Saint Marys, PA	TREES/WIRES DOWN.
Jun 14, 1:28 PM EDT	TSTM WND DMG	Driftwood, PA	TREES AND WIRES DOWN IN THE VICINITY OF DRIFTWOOD.

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
Jun 14, 11:46 AM EDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Pittsburgh, PA (KPIT), launched 12:00Z, 4.8 hours before the alert went out and 172 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1684 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: 26 m²/s²
0-3 km storm-relative helicity: 72 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

315 
WUUS51 KCTP 141647
SVRCTP
PAC023-033-047-141800-
/O.NEW.KCTP.SV.W.0037.210614T1647Z-210614T1800Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service State College PA
1247 PM EDT Mon Jun 14 2021

The National Weather Service in State College PA has issued a

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

* Until 200 PM EDT.

* At 1247 PM EDT, severe thunderstorms were located along a line
  extending from near Elk River to near St. Marys to Brandy Camp to
  near Brockway, moving east at 40 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  St. Marys, DuBois, Cameron, Penfield, Karthaus, Force, Benezette,
  Stevenson Dam, Brandy Camp, Hicks Run, Brockport, Parker Dam State
  Park, Lecontes Mills, S.B. Elliot State Park, Medix Run, Truman,
  Kersey, Weedville, Driftwood and Treasure Lake.

For those driving on Interstate 80, this includes areas between the
Dubois and Clearfield exits, specifically from mile markers 97 to
111.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4143 7799 4137 7799 4122 7809 4116 7805
      4113 7806 4112 7811 4106 7809 4106 7807
      4103 7808 4114 7880 4120 7876 4120 7871
      4123 7871 4123 7874 4126 7873 4131 7883
      4140 7866 4151 7858
TIME...MOT...LOC 1647Z 282DEG 33KT 4154 7842 4138 7855 4132 7868 4128
7882

HAIL...<.75IN
WIND...60MPH
 
$$

Colbert

2 follow-up statements

230 
WWUS51 KCTP 141710
SVSCTP

Severe Weather Statement
National Weather Service State College PA
110 PM EDT Mon Jun 14 2021

PAC023-033-047-141800-
/O.CON.KCTP.SV.W.0037.000000T0000Z-210614T1800Z/
Elk PA-Clearfield PA-Cameron PA-
110 PM EDT Mon Jun 14 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 200 PM EDT
FOR SOUTHEASTERN ELK...NORTHERN CLEARFIELD AND SOUTHERN CAMERON
COUNTIES...

At 109 PM EDT, severe thunderstorms were located along a line
extending from near Cameron to Medix Run to Force to near Penfield,
moving southeast at 35 mph.

HAZARD...70 mph wind gusts.

SOURCE...Law enforcement.

IMPACT...Expect considerable tree damage. Damage is likely to mobile 
         homes, roofs, and outbuildings.

Locations impacted include...
St. Marys, DuBois, Cameron, Penfield, Karthaus, Force, Benezette,
Stevenson Dam, Hicks Run, Brockport, Parker Dam State Park, Lecontes
Mills, S.B. Elliot State Park, Medix Run, Truman, Kersey, Weedville,
Driftwood, Treasure Lake and Penn State Dubois.

For those driving on Interstate 80, this includes areas between the
Dubois and Clearfield exits, specifically from mile markers 99 to
111.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4113 7875 4117 7878 4120 7876 4120 7871
      4123 7871 4123 7874 4126 7873 4127 7872
      4135 7860 4149 7844 4143 7799 4137 7799
      4122 7809 4116 7805 4113 7806 4112 7811
      4106 7809 4106 7807 4103 7808
TIME...MOT...LOC 1709Z 294DEG 28KT 4145 7825 4129 7838 4123 7851 4119
7865

HAIL...<.75IN
WIND...70MPH
 
$$

Colbert

739 
WWUS51 KCTP 141757
SVSCTP

Severe Weather Statement
National Weather Service State College PA
157 PM EDT Mon Jun 14 2021

PAC023-033-047-141807-
/O.EXP.KCTP.SV.W.0037.000000T0000Z-210614T1800Z/
Elk PA-Clearfield PA-Cameron PA-
157 PM EDT Mon Jun 14 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN ELK...NORTHERN
CLEARFIELD AND SOUTHERN CAMERON COUNTIES WILL EXPIRE AT 200 PM EDT...
    
The storms which prompted the warning have moved out of the area.
Therefore, the warning will be allowed to expire.

A Severe Thunderstorm Watch remains in effect until 600 PM EDT for
central and 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.

LAT...LON 4113 7875 4117 7878 4120 7876 4120 7871
      4123 7871 4123 7874 4126 7873 4127 7872
      4135 7860 4149 7844 4143 7799 4137 7799
      4122 7809 4116 7805 4113 7806 4112 7811
      4106 7809 4106 7807 4103 7808
TIME...MOT...LOC 1757Z 282DEG 33KT 4136 7768 4120 7781 4114 7794 4110
7808

$$

Colbert

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 13, 8:10 PM EDT	Severe Thunderstorm Warning	CTP	McKean	35 min
Jun 13, 8:15 PM EDT	Special Weather Statement	CTP	Centre	45 min
Jun 13, 8:30 PM EDT	Special Weather Statement	CTP	Huntingdon	30 min
Jun 13, 8:41 PM EDT	Severe Thunderstorm Warning	CTP	McKean, Potter	64 min
Jun 13, 9:02 PM EDT	Special Weather Statement	CTP	Huntingdon	43 min
Jun 13, 9:08 PM EDT	Areal Flood Advisory	CTP	McKean	67 min
Jun 13, 9:38 PM EDT	Areal Flood Advisory	CTP	Centre	82 min
Jun 13, 9:47 PM EDT	Areal Flood Advisory	CTP	Potter	73 min
Jun 13, 10:58 PM EDT	Areal Flood Advisory	CTP	Centre	2 hr
Jun 13, 11:04 PM EDT	Areal Flood Advisory	CTP	Huntingdon, Mifflin	116 min
Jun 13, 11:04 PM EDT	Special Weather Statement	CTP	Juniata	56 min
Jun 13, 11:56 PM EDT	Special Weather Statement	CTP	Perry	34 min
Jun 14, 12:29 AM EDT	Special Weather Statement	CTP	Cumberland	31 min
Jun 14, 12:37 AM EDT	Severe Thunderstorm Warning	CTP	Cumberland, Perry	38 min
Jun 14, 1:12 AM EDT	Severe Thunderstorm Warning	CTP	Cumberland, York	48 min
Jun 14, 11:36 AM EDT	Special Weather Statement	CTP	Warren	39 min
Jun 14, 12:02 PM EDT	Special Weather Statement	CTP	Elk	58 min
Jun 14, 1:31 PM EDT	Severe Thunderstorm Warning	CTP	Clinton	74 min
Jun 14, 1:53 PM EDT	Special Weather Statement	CTP	Centre	37 min
Jun 14, 2:33 PM EDT	Severe Thunderstorm Warning	CTP	Clinton, Lycoming, Union	57 min
Jun 14, 3:18 PM EDT	Severe Thunderstorm Warning	CTP	Columbia, Lycoming, Montour, Northumberland, Union	57 min
Jun 14, 4:04 PM EDT	Severe Thunderstorm Warning	CTP	Blair, Cambria	41 min
Jun 14, 4:10 PM EDT	Special Weather Statement	CTP	Centre	20 min
Jun 14, 4:10 PM EDT	Severe Thunderstorm Warning	CTP	Columbia, Schuylkill	50 min
Jun 14, 4:16 PM EDT	Special Weather Statement	CTP	Somerset	14 min
Jun 14, 4:24 PM EDT	Special Weather Statement	CTP	Blair	21 min
Jun 14, 4:43 PM EDT	Special Weather Statement	CTP	Blair	47 min
Jun 14, 4:44 PM EDT	Special Weather Statement	CTP	Somerset	16 min
Jun 14, 5:04 PM EDT	Special Weather Statement	CTP	Somerset	26 min
Jun 14, 5:49 PM EDT	Special Weather Statement	CTP	Somerset	26 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.