Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 111, NWS State College, PA

July 11, 2021Elk County, Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at Jul 11, 2021, 5:18 PM EDT for Elk County, Pennsylvania. It was in force for 46 min. 1 report 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 11, 2021, 5:18 PM EDT (21:18 UTC)
Expired: Jul 11, 2021, 6:04 PM EDT
In force: 46 min
Issued by: NWS State College, PA
Area: Storm-based polygon
Tornado: Possible
Hail: 0.75 in
Wind: 60.0 mph

County Elk County, PA

The radar

The State College radar (KCCX), 55 km from the middle of the area, began a volume at 21:18 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 11, 5:43 PM EDT	TSTM WND DMG	2 Nnw Medix Run, PA	TREE ON WIRES IN BENEZETTE TOWNSHIP.

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 11, 2:40 PM EDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Pittsburgh, PA (KPIT), launched 12:00Z, 9.3 hours before the alert went out and 167 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: 5 J/kg
Mixed-layer CIN: -180 J/kg
Mixed-layer LCL: 979 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 90 m²/s²
0-3 km storm-relative helicity: 135 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

088 
WUUS51 KCTP 112118
SVRCTP
PAC047-112215-
/O.NEW.KCTP.SV.W.0111.210711T2118Z-210711T2215Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service State College PA
518 PM EDT Sun Jul 11 2021

The National Weather Service in State College PA has issued a

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

* Until 615 PM EDT.

* At 517 PM EDT, a severe thunderstorm was located over Force, moving
  northeast at 25 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* This severe thunderstorm will be near...
  Force around 520 PM EDT.
  Medix Run around 540 PM EDT.

Other locations impacted by this severe thunderstorm include
Weedville.

This includes State Road 255 from north of Penfield to near Force.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

This thunderstorm is capable of producing all types of severe weather
including extremely large hail, destructive straight line winds and
tornadoes. Move quickly to a safe shelter such as an interior room, a
bathroom, closet or basement.

&&

LAT...LON 4128 7829 4124 7848 4125 7860 4125 7861
      4127 7860 4135 7843
TIME...MOT...LOC 2117Z 244DEG 20KT 4127 7854 

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

Lambert

1 follow-up statement

408 
WWUS51 KCTP 112204
SVSCTP

Severe Weather Statement
National Weather Service State College PA
604 PM EDT Sun Jul 11 2021

PAC047-112213-
/O.CAN.KCTP.SV.W.0111.000000T0000Z-210711T2215Z/
Elk PA-
604 PM EDT Sun Jul 11 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN ELK 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 900 PM EDT for
central and north central Pennsylvania.

LAT...LON 4128 7829 4124 7848 4125 7860 4125 7861
      4127 7860 4135 7843
TIME...MOT...LOC 2159Z 244DEG 20KT 4138 7823 

$$

Evanego/Gutierrez

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 11, 3:29 PM EDT	Special Weather Statement	CTP	Cameron	31 min
Jul 11, 3:51 PM EDT	Special Weather Statement	CTP	Cambria	39 min
Jul 11, 4:42 PM EDT	Flash Flood Watch	CTP	Columbia, Lycoming, Sullivan, Tioga	9 hr
Jul 11, 4:48 PM EDT	Severe Thunderstorm Warning	CTP	Cameron, Elk	42 min
Jul 11, 4:51 PM EDT	Severe Thunderstorm Warning	CTP	Clearfield, Elk	39 min
Jul 11, 4:59 PM EDT	Special Weather Statement	CTP	Blair	46 min
Jul 11, 5:06 PM EDT	Special Weather Statement	CTP	Snyder	39 min
Jul 11, 5:06 PM EDT	Severe Thunderstorm Warning	CTP	Blair, Huntingdon	24 min
Jul 11, 5:10 PM EDT	Tornado Warning	CTP	Cameron, Elk	24 min
Jul 11, 5:19 PM EDT	Severe Thunderstorm Warning	CTP	Cameron, Clearfield, Elk	41 min
Jul 11, 5:25 PM EDT	Severe Thunderstorm Warning	CTP	Cambria, Somerset	65 min
Jul 11, 5:30 PM EDT	Severe Thunderstorm Warning	CTP	Blair, Centre, Clearfield, Huntingdon	45 min
Jul 11, 5:37 PM EDT	Areal Flood Advisory	CTP	Cameron, Clearfield, Clinton, Elk, Potter	2 hr
Jul 11, 5:52 PM EDT	Special Weather Statement	CTP	Bedford	23 min
Jul 11, 5:55 PM EDT	Severe Thunderstorm Warning	CTP	Cameron, Centre, Clearfield, Clinton, Potter	35 min
Jul 11, 6:03 PM EDT	Severe Thunderstorm Warning	CTP	Bedford, Blair, Cambria, Centre, Clearfield, Huntingdon and 1 more	57 min
Jul 11, 6:16 PM EDT	Tornado Warning	CTP	Centre, Clinton	29 min
Jul 11, 6:23 PM EDT	Severe Thunderstorm Warning	CTP	Centre, Clinton	52 min
Jul 11, 6:35 PM EDT	Special Weather Statement	CTP	Sullivan	25 min
Jul 11, 6:39 PM EDT	Severe Thunderstorm Warning	CTP	Centre, Clinton	51 min
Jul 11, 6:48 PM EDT	Tornado Warning	CTP	Centre, Clinton	27 min
Jul 11, 6:57 PM EDT	Severe Thunderstorm Warning	CTP	Bedford, Centre, Cumberland, Franklin, Fulton, Huntingdon and 3 more	63 min
Jul 11, 7:02 PM EDT	Severe Thunderstorm Warning	CTP	Columbia, Sullivan	43 min
Jul 11, 7:25 PM EDT	Severe Thunderstorm Warning	CTP	Clinton	50 min
Jul 11, 7:31 PM EDT	Severe Thunderstorm Warning	CTP	Centre, Clinton, Juniata, Mifflin, Snyder, Union	44 min
Jul 11, 7:39 PM EDT	Tornado Warning	CTP	Clinton, Lycoming	36 min
Jul 11, 7:48 PM EDT	Special Weather Statement	CTP	Sullivan	27 min
Jul 11, 7:58 PM EDT	Severe Thunderstorm Warning	CTP	Bedford, Cumberland, Franklin, Fulton, Huntingdon, Juniata and 2 more	62 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.