Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 189, NWS State College, PA

July 29, 2021Bedford County, Blair County, Cambria County, Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at Jul 29, 2021, 6:24 PM EDT for Bedford County, Blair County, Cambria County, Pennsylvania. It was in force for 12 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 29, 2021, 6:24 PM EDT (22:24 UTC)
Expired: Jul 29, 2021, 6:36 PM EDT
In force: 12 min
Issued by: NWS State College, PA
Area: Storm-based polygon
Tornado: Possible
Hail: 0.75 in
Wind: 60.0 mph

Counties Bedford County, PA, Blair County, PA, Cambria County, PA

The radar

The State College radar (KCCX), 80 km from the middle of the area, began a volume at 22:27 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.

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 29, 2:23 PM EDT	Tornado Watch	SPC	8 hr
Jul 29, 3:13 PM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Pittsburgh, PA (KPIT), launched 12:00Z, 10.4 hours before the alert went out and 124 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: 136 J/kg
Mixed-layer CIN: -76 J/kg
Mixed-layer LCL: 1222 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 175 m²/s²
0-3 km storm-relative helicity: 213 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

As transmitted.

828 
WUUS51 KCTP 292224
SVRCTP
PAC009-013-021-292315-
/O.NEW.KCTP.SV.W.0189.210729T2224Z-210729T2315Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service State College PA
624 PM EDT Thu Jul 29 2021

The National Weather Service in State College PA has issued a

* Severe Thunderstorm Warning for...
  North central Bedford County in south central Pennsylvania...
  Southwestern Blair County in central Pennsylvania...
  South central Cambria County in central Pennsylvania...

* Until 715 PM EDT.

* At 623 PM EDT, a severe thunderstorm was located over Ebensburg,
  moving southeast at 30 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Ebensburg, Portage, Roaring Spring, Cresson, Claysburg,
  Duncansville, Lilly, Queen, Ski Gap, East Freedom, Spring Hill,
  Summerhill, Newry, Wilmore, Cassandra, Blue Knob Ski Resort and Mt.
  Aloysius College.

This includes Interstate 99 from mile markers 12 to 26.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 900 PM EDT for south central
and central Pennsylvania.

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

&&

LAT...LON 4041 7883 4051 7877 4039 7830 4019 7845
TIME...MOT...LOC 2223Z 297DEG 27KT 4045 7874 

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

Travis

1 follow-up statement

562 
WWUS51 KCTP 292236
SVSCTP

Severe Weather Statement
National Weather Service State College PA
636 PM EDT Thu Jul 29 2021

PAC009-013-021-292245-
/O.CAN.KCTP.SV.W.0189.000000T0000Z-210729T2315Z/
Bedford PA-Blair PA-Cambria PA-
636 PM EDT Thu Jul 29 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL BEDFORD...
SOUTHWESTERN BLAIR AND SOUTH CENTRAL CAMBRIA COUNTIES IS CANCELLED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been cancelled.

A Tornado Watch remains in effect until 900 PM EDT for south central
and central Pennsylvania.

A Severe Thunderstorm Watch remains in effect until 1000 PM EDT for
central Pennsylvania.

LAT...LON 4041 7883 4051 7877 4039 7830 4019 7845
TIME...MOT...LOC 2234Z 297DEG 27KT 4041 7863 

$$

Travis

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 29, 8:28 AM EDT	Special Weather Statement	CTP	Warren	47 min
Jul 29, 10:05 AM EDT	Special Weather Statement	CTP	Elk	25 min
Jul 29, 10:47 AM EDT	Special Weather Statement	CTP	Warren	43 min
Jul 29, 1:12 PM EDT	Special Weather Statement	CTP	Clearfield	33 min
Jul 29, 1:50 PM EDT	Severe Thunderstorm Warning	CTP	Blair, Cambria, Centre, Clearfield	25 min
Jul 29, 2:13 PM EDT	Tornado Warning	CTP	Somerset	32 min
Jul 29, 2:14 PM EDT	Severe Thunderstorm Warning	CTP	Blair, Centre, Huntingdon	46 min
Jul 29, 2:22 PM EDT	Special Weather Statement	CTP	Centre	23 min
Jul 29, 2:58 PM EDT	Special Weather Statement	CTP	Mifflin	32 min
Jul 29, 3:50 PM EDT	Special Weather Statement	CTP	Juniata, Perry	25 min
Jul 29, 5:26 PM EDT	Special Weather Statement	CTP	Cambria	34 min
Jul 29, 6:08 PM EDT	Special Weather Statement	CTP	Lancaster	52 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.