Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 97, NWS State College, PA

July 7, 2021Cambria County, Somerset County, Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at Jul 7, 2021, 8:40 PM EDT for Cambria County, Somerset County, Pennsylvania. It was in force for 65 min. 3 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, 8:40 PM EDT (00:40 UTC)
Expired: Jul 7, 2021, 9:45 PM EDT
In force: 65 min
Issued by: NWS State College, PA
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Cambria County, PA, Somerset County, PA

The radar

The State College radar (KCCX), 87 km from the middle of the area, began a volume at 00:41 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, 8:52 PM EDT	TSTM WND DMG	3 Nw Jennerstown, PA	TREES DOWN ON WIRES ALONG THE LAUREL HIGHLANDS TRAIL.
Jul 7, 9:13 PM EDT	TSTM WND DMG	1 Nnw Jerome, PA	TRESS BROUGHT DOWN WIRES.
Jul 7, 9:20 PM EDT	TSTM WND DMG	3 Ssw Loretto, PA	TREES AND WIRES DOWN IN MUNSTER.

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

Pittsburgh, PA (KPIT), launched 00:00Z, 0.7 hours before the alert went out and 112 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: 213 J/kg
Mixed-layer CIN: -97 J/kg
Mixed-layer LCL: 1250 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 50 m²/s²
0-3 km storm-relative helicity: 63 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

As transmitted.

757 
WUUS51 KCTP 080040
SVRCTP
PAC021-111-080145-
/O.NEW.KCTP.SV.W.0097.210708T0040Z-210708T0145Z/

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

The National Weather Service in State College PA has issued a

* Severe Thunderstorm Warning for...
  North central Somerset County in south central Pennsylvania...
  Cambria County in central Pennsylvania...

* Until 945 PM EDT.

* At 839 PM EDT, severe thunderstorms were located along a line
  extending from near Blairsville to near Ligonier, moving northeast
  at 30 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Johnstown, Westmont, Ebensburg, Belmont, Nanty-Glo, Portage,
  Northern Cambria, Geistown, Southmont, Cresson, Vinco, Loretto,
  Dale, East Conemaugh, Salix-Beauty Line Park, Beaverdale-Lloydell,
  Lilly, South Fork, Carrolltown and Sankertown.

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 these storms. 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.

&&

LAT...LON 4041 7897 4072 7880 4043 7855 4037 7856
      4035 7861 4033 7862 4019 7912
TIME...MOT...LOC 0039Z 245DEG 27KT 4043 7932 4022 7914 

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

Banghoff

2 follow-up statements

808 
WWUS51 KCTP 080121
SVSCTP

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

PAC111-080130-
/O.CAN.KCTP.SV.W.0097.000000T0000Z-210708T0145Z/
Somerset PA-
921 PM EDT Wed Jul 7 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL SOMERSET COUNTY
IS CANCELLED...

The storms which prompted the warning have moved out of the warned 
area. Therefore, the warning has been cancelled.

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

LAT...LON 4048 7892 4072 7880 4043 7855 4037 7856
      4035 7861 4033 7862 4025 7889 4027 7889
      4028 7893 4029 7905
TIME...MOT...LOC 0120Z 245DEG 27KT 4055 7897 4034 7879 

$$

PAC021-080145-
/O.CON.KCTP.SV.W.0097.000000T0000Z-210708T0145Z/
Cambria PA-
921 PM EDT Wed Jul 7 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 945 PM EDT
FOR CAMBRIA COUNTY...

At 920 PM EDT, severe thunderstorms were located along a line
extending from near Belsano to South Fork, moving northeast at 30
mph.

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

SOURCE...Law enforcement reported numerous downed trees in the 
         warned area.

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

Locations impacted include...
Johnstown, Westmont, Ebensburg, Belmont, Nanty-Glo, Portage, Northern
Cambria, Geistown, Southmont, Cresson, Vinco, Loretto, Dale, East
Conemaugh, Salix-Beauty Line Park, Beaverdale-Lloydell, Lilly, South
Fork, Carrolltown and Sankertown.

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 these storms.
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.

&&

LAT...LON 4048 7892 4072 7880 4043 7855 4037 7856
      4035 7861 4033 7862 4025 7889 4027 7889
      4028 7893 4029 7905
TIME...MOT...LOC 0120Z 245DEG 27KT 4055 7897 4034 7879 

HAIL...0.88IN
WIND...60MPH
 
$$

Banghoff

035 
WWUS51 KCTP 080137
SVSCTP

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

PAC021-080146-
/O.EXP.KCTP.SV.W.0097.000000T0000Z-210708T0145Z/
Cambria PA-
937 PM EDT Wed Jul 7 2021

...THE SEVERE THUNDERSTORM WARNING FOR CAMBRIA COUNTY WILL EXPIRE AT
945 PM EDT...
    
The storms which prompted the warning have weakened below severe
limits, and have exited the warned area. Therefore, the warning will
be allowed to expire.  However heavy rain is still possible with
these thunderstorms.

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

Remember, a Severe Thunderstorm Warning still remains in effect for
northeast Cambria and northern Blair Counties until 1000 PM EDT.

LAT...LON 4048 7892 4072 7880 4043 7855 4037 7856
      4035 7861 4033 7862 4025 7889 4027 7889
      4028 7893 4029 7905
TIME...MOT...LOC 0136Z 245DEG 27KT 4055 7897 4034 7879 

$$

Banghoff

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 7, 8:02 PM EDT	Special Weather Statement	CTP	Tioga	58 min
Jul 7, 8:04 PM EDT	Severe Thunderstorm Warning	CTP	Tioga	56 min
Jul 7, 8:10 PM EDT	Special Weather Statement	CTP	Northumberland	35 min
Jul 7, 8:12 PM EDT	Severe Thunderstorm Warning	CTP	Columbia, Lycoming, Montour, Northumberland, Sullivan, Tioga	48 min
Jul 7, 8:20 PM EDT	Special Weather Statement	CTP	Fulton	25 min
Jul 7, 8:21 PM EDT	Severe Thunderstorm Warning	CTP	Tioga	39 min
Jul 7, 8:25 PM EDT	Special Weather Statement	CTP	Snyder	35 min
Jul 7, 8:47 PM EDT	Severe Thunderstorm Warning	CTP	Columbia, Sullivan	28 min
Jul 7, 8:49 PM EDT	Special Weather Statement	CTP	Franklin	26 min
Jul 7, 9:12 PM EDT	Special Weather Statement	CTP	Centre	33 min
Jul 7, 9:16 PM EDT	Severe Thunderstorm Warning	CTP	Blair, Cambria	44 min
Jul 7, 9:24 PM EDT	Areal Flood Advisory	CTP	Columbia, Sullivan	2 hr
Jul 7, 9:36 PM EDT	Special Weather Statement	CTP	Columbia	24 min
Jul 7, 9:43 PM EDT	Special Weather Statement	CTP	Centre	32 min
Jul 7, 10:04 PM EDT	Special Weather Statement	CTP	Centre, Clearfield	26 min
Jul 7, 10:07 PM EDT	Special Weather Statement	CTP	Schuylkill	23 min
Jul 7, 10:14 PM EDT	Special Weather Statement	CTP	Union	46 min
Jul 7, 10:20 PM EDT	Special Weather Statement	CTP	Snyder	25 min
Jul 7, 10:33 PM EDT	Special Weather Statement	CTP	Union	27 min
Jul 7, 11:02 PM EDT	Special Weather Statement	CTP	Montour, Union	28 min
Jul 8, 2:12 PM EDT	Special Weather Statement	CTP	York	48 min
Jul 8, 2:36 PM EDT	Special Weather Statement	CTP	Lancaster	39 min
Jul 8, 3:15 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster, Lebanon	60 min
Jul 8, 3:17 PM EDT	Severe Thunderstorm Warning	CTP	Adams, Cumberland, Dauphin, Franklin, York	73 min
Jul 8, 3:38 PM EDT	Severe Thunderstorm Warning	CTP	Dauphin, Lancaster, Lebanon, York	52 min
Jul 8, 4:25 PM EDT	Areal Flood Advisory	CTP	Adams, Cumberland	112 min
Jul 8, 4:31 PM EDT	Areal Flood Advisory	CTP	Lancaster, York	58 min
Jul 8, 4:36 PM EDT	Special Weather Statement	CTP	Adams, Cumberland, Dauphin, Franklin, Juniata, Lebanon and 3 more	54 min
Jul 8, 4:48 PM EDT	Severe Thunderstorm Warning	CTP	Lebanon	27 min
Jul 8, 4:51 PM EDT	Areal Flood Advisory	CTP	Cumberland, Dauphin, Lebanon, Perry	103 min
Jul 8, 5:31 PM EDT	Special Weather Statement	CTP	Juniata	44 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.