Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 75, NWS State College, PA

July 7, 2021Cambria County, Somerset County, Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at Jul 7, 2021, 4:12 PM EDT for Cambria County, Somerset County, Pennsylvania. It was in force for 47 min. 5 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, 4:12 PM EDT (20:12 UTC)
Expired: Jul 7, 2021, 4:59 PM EDT
In force: 47 min
Issued by: NWS State College, PA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Cambria County, PA, Somerset County, PA

The radar

The State College radar (KCCX), 106 km from the middle of the area, began a volume at 20:14 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, 4:28 PM EDT	TSTM WND DMG	1 Se Westmont, PA	WIDESPREAD TREES AND WIRES DOWN AROUND WESTMONT AND ELIM.
Jul 7, 4:28 PM EDT	TSTM WND DMG	1 Se Westmont, PA
Jul 7, 4:30 PM EDT	TSTM WND DMG	Lorain, PA	CORRECTS PREVIOUS TSTM WND DMG REPORT FROM LORAIN. MULTIPLE TREES DOWN.
Jul 7, 4:30 PM EDT	TSTM WND DMG	Lorain, PA
Jul 7, 4:40 PM EDT	TSTM WND DMG	Lorain, PA	MULTIPLE TREES DOWN.

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 12:00Z, 8.2 hours before the alert went out and 99 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: 505 J/kg
Mixed-layer CIN: -47 J/kg
Mixed-layer LCL: 1230 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 36 m²/s²
0-3 km storm-relative helicity: 53 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

940 
WUUS51 KCTP 072012
SVRCTP
PAC021-111-072115-
/O.NEW.KCTP.SV.W.0075.210707T2012Z-210707T2115Z/

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

The National Weather Service in State College PA has issued a

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

* Until 515 PM EDT.

* At 411 PM EDT, a severe thunderstorm was located near Jerome,
  moving east at 10 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...
  Johnstown, Westmont, Windber, Belmont, Geistown, Southmont, Dale,
  East Conemaugh, Davidsville, Paint, Jerome, Scalp Level, Daisytown,
  Tire Hill, Elim, Lorain, Brownstown, Benson, University Of
  Pittsburgh - Johnstown and Johnstown Flood National Memorial
  Historic Site.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4035 7900 4040 7880 4013 7881 4021 7911
TIME...MOT...LOC 2011Z 266DEG 9KT 4026 7904 

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

Banghoff

2 follow-up statements

042 
WWUS51 KCTP 072033
SVSCTP

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

PAC111-072042-
/O.CAN.KCTP.SV.W.0075.000000T0000Z-210707T2115Z/
Somerset PA-
433 PM EDT Wed Jul 7 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN SOMERSET 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
central Pennsylvania.

LAT...LON 4035 7900 4040 7880 4024 7881 4025 7888
      4027 7889 4028 7892 4028 7893 4029 7905
TIME...MOT...LOC 2032Z 238DEG 15KT 4032 7893 

$$

PAC021-072115-
/O.CON.KCTP.SV.W.0075.000000T0000Z-210707T2115Z/
Cambria PA-
433 PM EDT Wed Jul 7 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM EDT
FOR SOUTHWESTERN CAMBRIA COUNTY...

At 432 PM EDT, a severe thunderstorm was located over Southmont,
moving northeast at 15 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...
Johnstown, Westmont, Windber, Belmont, Geistown, Southmont, Dale,
East Conemaugh, Paint, Scalp Level, Daisytown, Elim, Lorain,
Brownstown, University Of Pittsburgh - Johnstown, Johnstown Flood
National Memorial Historic Site and John Murtha Johnstown-Cambria
County Airport.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4035 7900 4040 7880 4024 7881 4025 7888
      4027 7889 4028 7892 4028 7893 4029 7905
TIME...MOT...LOC 2032Z 238DEG 15KT 4032 7893 

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

Banghoff

523 
WWUS51 KCTP 072059
SVSCTP

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

PAC021-072109-
/O.CAN.KCTP.SV.W.0075.000000T0000Z-210707T2115Z/
Cambria PA-
459 PM EDT Wed Jul 7 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN CAMBRIA 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 1100 PM EDT for
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 4035 7900 4040 7880 4024 7881 4025 7888
      4027 7889 4028 7892 4028 7893 4029 7905
TIME...MOT...LOC 2056Z 266DEG 9KT 4032 7884 

$$

Banghoff

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 7, 3:35 PM EDT	Special Weather Statement	CTP	Fulton	40 min
Jul 7, 4:00 PM EDT	Special Weather Statement	CTP	Warren	45 min
Jul 7, 4:05 PM EDT	Special Weather Statement	CTP	Somerset	25 min
Jul 7, 4:12 PM EDT	Special Weather Statement	CTP	Somerset	33 min
Jul 7, 4:22 PM EDT	Severe Thunderstorm Warning	CTP	Bedford, Somerset	38 min
Jul 7, 4:44 PM EDT	Severe Thunderstorm Warning	CTP	Cambria	61 min
Jul 7, 4:46 PM EDT	Special Weather Statement	CTP	Warren	29 min
Jul 7, 4:48 PM EDT	Special Weather Statement	CTP	Bedford	27 min
Jul 7, 4:54 PM EDT	Severe Thunderstorm Warning	CTP	Bedford, Somerset	51 min
Jul 7, 4:59 PM EDT	Special Weather Statement	CTP	Warren	31 min
Jul 7, 5:07 PM EDT	Severe Thunderstorm Warning	CTP	McKean, Warren	53 min
Jul 7, 5:12 PM EDT	Special Weather Statement	CTP	Blair	33 min
Jul 7, 5:19 PM EDT	Severe Thunderstorm Warning	CTP	Blair	41 min
Jul 7, 5:23 PM EDT	Severe Thunderstorm Warning	CTP	Bedford	37 min
Jul 7, 5:27 PM EDT	Special Weather Statement	CTP	Clearfield	33 min
Jul 7, 5:35 PM EDT	Severe Thunderstorm Warning	CTP	Blair	25 min
Jul 7, 5:38 PM EDT	Special Weather Statement	CTP	Warren	37 min
Jul 7, 5:42 PM EDT	Special Weather Statement	CTP	Cumberland	33 min
Jul 7, 5:48 PM EDT	Severe Thunderstorm Warning	CTP	Blair, Huntingdon	57 min
Jul 7, 5:50 PM EDT	Severe Thunderstorm Warning	CTP	Cumberland, Franklin	40 min
Jul 7, 5:55 PM EDT	Severe Thunderstorm Warning	CTP	McKean	65 min
Jul 7, 6:00 PM EDT	Special Weather Statement	CTP	Elk	30 min
Jul 7, 6:12 PM EDT	Severe Thunderstorm Warning	CTP	Centre, Clearfield, Huntingdon	48 min
Jul 7, 6:22 PM EDT	Special Weather Statement	CTP	Mifflin	23 min
Jul 7, 6:29 PM EDT	Severe Thunderstorm Warning	CTP	Warren	61 min
Jul 7, 6:36 PM EDT	Severe Thunderstorm Warning	CTP	Centre, Clearfield, Clinton, Mifflin	39 min
Jul 7, 6:37 PM EDT	Severe Thunderstorm Warning	CTP	Cumberland, Franklin, Perry	37 min
Jul 7, 6:43 PM EDT	Severe Thunderstorm Warning	CTP	McKean, Potter	77 min
Jul 7, 6:56 PM EDT	Severe Thunderstorm Warning	CTP	Centre, Clinton, Mifflin, Snyder, Union	49 min
Jul 7, 7:09 PM EDT	Severe Thunderstorm Warning	CTP	Juniata, Mifflin, Snyder	36 min
Jul 7, 7:19 PM EDT	Areal Flood Advisory	CTP	Warren	116 min
Jul 7, 7:31 PM EDT	Severe Thunderstorm Warning	CTP	Clinton, Lycoming, Montour, Northumberland, Union	44 min
Jul 7, 7:44 PM EDT	Areal Flood Advisory	CTP	McKean, Potter	2 hr
Jul 7, 7:48 PM EDT	Special Weather Statement	CTP	Bedford	27 min
Jul 7, 7:50 PM EDT	Special Weather Statement	CTP	Tioga	10 min
Jul 7, 7:51 PM EDT	Special Weather Statement	CTP	Potter	24 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.