Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 80, NWS State College, PA

July 7, 2021Blair County, Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at Jul 7, 2021, 5:19 PM EDT for Blair County, Pennsylvania. It was in force for 41 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: Jul 7, 2021, 5:19 PM EDT (21:19 UTC)
Expired: Jul 7, 2021, 6:00 PM EDT
In force: 41 min
Issued by: NWS State College, PA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Blair County, PA

The radar

The State College radar (KCCX), 72 km from the middle of the area, began a volume at 21:20 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, 5:39 PM EDT	TSTM WND DMG	1 Nnw Hollidaysburg, PA	TREES DOWN ON WIRES.
Jul 7, 5:39 PM EDT	TSTM WND DMG	1 Nnw Hollidaysburg, PA

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, 9.3 hours before the alert went out and 144 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.

653 
WUUS51 KCTP 072119
SVRCTP
PAC013-072200-
/O.NEW.KCTP.SV.W.0080.210707T2119Z-210707T2200Z/

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

The National Weather Service in State College PA has issued a

* Severe Thunderstorm Warning for...
  Southern Blair County in central Pennsylvania...

* Until 600 PM EDT.

* At 518 PM EDT, a severe thunderstorm was located near Ski Gap,
  moving east 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.

* This severe thunderstorm will be near...
  Claysburg around 520 PM EDT.
  Roaring Spring around 530 PM EDT.
  Hollidaysburg, Duncansville and Lakemont around 540 PM EDT.
  Martinsburg around 550 PM EDT.

Other locations impacted by this severe thunderstorm include East
Freedom, Newry, Altoona-Blair County Airport, Peoples Natural Gas
Field, Lakemont Park And Island Waterpark and Blue Knob Ski Resort.

This includes Interstate 99 from mile markers 15 to 32.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4029 7850 4030 7856 4036 7858 4037 7856
      4044 7855 4054 7818 4053 7817 4045 7815
      4026 7828 4026 7834 4030 7843 4026 7844
      4025 7846
TIME...MOT...LOC 2118Z 259DEG 14KT 4036 7849 

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

Jurewicz

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, 4:12 PM EDT	Severe Thunderstorm Warning	CTP	Cambria, Somerset	47 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, 5:23 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.