Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 151, NWS State College, PA

July 13, 2021Centre County, Huntingdon County, Mifflin County, Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at Jul 13, 2021, 7:16 PM EDT for Centre County, Huntingdon County, Mifflin County, Pennsylvania. It was in force for 44 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 13, 2021, 7:16 PM EDT (23:16 UTC)
Expired: Jul 13, 2021, 8:00 PM EDT
In force: 44 min
Issued by: NWS State College, PA
Area: Storm-based polygon
Hail: 0.75 in
Wind: 70.0 mph

Counties Centre County, PA, Huntingdon County, PA, Mifflin County, PA

The radar

The State College radar (KCCX), 25 km from the middle of the area, began a volume at 23:18 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 13, 7:25 PM EDT	TSTM WND DMG	2 W Rock Springs, PA	MULTIPLE TREES AND WIRES DOWN ON ANACONDA DR.
Jul 13, 7:25 PM EDT	TSTM WND DMG	3 Ene Warriors Mark, PA	MULTIPLE TREES DOWN (BROKEN OR UPROOTED) ALONG DRY HOLLOW RD NEAR THE CENTRE/HUNTINGDON COUNTY BORDER.
Jul 13, 7:53 PM EDT	HAIL 1	State College, PA	MULTIPLE REPORTS OF QUARTER SIZED HAIL IN STATE COLLEGE.

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 13, 1:37 PM EDT	Severe Thunderstorm Watch	SPC	10 hr

The nearest sounding before it

Pittsburgh, PA (KPIT), launched 12:00Z, 11.3 hours before the alert went out and 204 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: 107 J/kg
Mixed-layer CIN: -136 J/kg
Mixed-layer LCL: 980 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 84 m²/s²
0-3 km storm-relative helicity: 158 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

Open this sounding in Storm Lab

The text

As transmitted.

708 
WUUS51 KCTP 132316
SVRCTP
PAC027-061-087-140000-
/O.NEW.KCTP.SV.W.0151.210713T2316Z-210714T0000Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service State College PA
716 PM EDT Tue Jul 13 2021

The National Weather Service in State College PA has issued a

* Severe Thunderstorm Warning for...
  Northeastern Huntingdon County in central Pennsylvania...
  Mifflin County in central Pennsylvania...
  Centre County in central Pennsylvania...

* Until 800 PM EDT.

* At 716 PM EDT, severe thunderstorms were located along a line
  extending from Black Moshannon State Park to near Port Matilda to
  near Franklinville to near Spruce Creek to Huntingdon, moving
  northeast at 25 mph.

  HAZARD...70 mph wind gusts and penny size hail.

  SOURCE...Radar indicated.

  IMPACT...Expect considerable tree damage. Damage is likely to 
           mobile homes, roofs, and outbuildings.

* Severe thunderstorms will be near...
  Black Moshannon State Park, Stormstown and Port Matilda around 720 
  PM EDT.
  Rock Springs, Julian, Ramblewood and Park Forest Village around 
  730 PM EDT.
  Pine Grove Mills, Whipple Dam State Park, Mcalevys Fort, 
  Allensville, Houserville and Snow Shoe around 740 PM EDT.
  Bellefonte, State College, Boalsburg, Milesburg, Pleasant Gap and 
  Lemont around 750 PM EDT.

Other locations impacted by these severe thunderstorms include
Barrville, Orviston, Longfellow, McConnellstown, Siglerville, Mill
Creek, Howard, Petersburg, Maitland and Alexandria.

For those driving on Interstate 80, this includes areas between the
Kylertown and Lamar exits, specifically from mile markers 143 to 170.

This includes Interstate 99 from mile markers 57 to 85.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4039 7810 4065 7814 4079 7810 4091 7821
      4096 7808 4112 7776 4111 7775 4109 7763
      4106 7756 4105 7758 4097 7751 4098 7741
      4089 7743 4066 7740 4062 7748 4058 7750
      4051 7762
TIME...MOT...LOC 2316Z 245DEG 23KT 4088 7808 4082 7802 4068 7806 4059
7806 4049 7804

HAIL...0.75IN
WIND...70MPH
 
$$

Jurewicz

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 12, 8:26 PM EDT	Areal Flood Advisory	CTP	Tioga	2 hr
Jul 12, 8:50 PM EDT	Areal Flood Advisory	CTP	Lycoming, Sullivan	2 hr
Jul 12, 9:47 PM EDT	Areal Flood Advisory	CTP	Sullivan	118 min
Jul 12, 11:21 PM EDT	Special Weather Statement	CTP	York	24 min
Jul 12, 11:52 PM EDT	Special Weather Statement	CTP	Adams, Lancaster, Lebanon, York	23 min
Jul 13, 12:53 AM EDT	Special Weather Statement	CTP	Lebanon	22 min
Jul 13, 1:31 AM EDT	Special Weather Statement	CTP	Schuylkill	29 min
Jul 13, 2:02 AM EDT	Special Weather Statement	CTP	Schuylkill	28 min
Jul 13, 12:39 PM EDT	Flash Flood Watch	CTP	Columbia, Lycoming, Montour, Northumberland, Snyder, Sullivan and 2 more	11 hr
Jul 13, 4:18 PM EDT	Special Weather Statement	CTP	Somerset	42 min
Jul 13, 4:31 PM EDT	Areal Flood Advisory	CTP	Tioga	119 min
Jul 13, 4:34 PM EDT	Severe Thunderstorm Warning	CTP	Somerset	41 min
Jul 13, 4:35 PM EDT	Severe Thunderstorm Warning	CTP	Warren	55 min
Jul 13, 4:38 PM EDT	Areal Flood Advisory	CTP	Somerset	3 hr
Jul 13, 5:14 PM EDT	Special Weather Statement	CTP	Somerset	46 min
Jul 13, 5:23 PM EDT	Severe Thunderstorm Warning	CTP	Elk, McKean, Warren	52 min
Jul 13, 5:35 PM EDT	Special Weather Statement	CTP	Clearfield	40 min
Jul 13, 5:38 PM EDT	Severe Thunderstorm Warning	CTP	Bedford, Somerset	41 min
Jul 13, 5:49 PM EDT	Severe Thunderstorm Warning	CTP	Cameron, Centre, Clearfield, Clinton, Potter	56 min
Jul 13, 5:53 PM EDT	Severe Thunderstorm Warning	CTP	Cameron, Clearfield, Elk	67 min
Jul 13, 5:56 PM EDT	Special Weather Statement	CTP	Clearfield	34 min
Jul 13, 6:01 PM EDT	Severe Thunderstorm Warning	CTP	Bedford, Blair, Cambria, Clearfield	59 min
Jul 13, 6:07 PM EDT	Severe Thunderstorm Warning	CTP	Clearfield, Elk	38 min
Jul 13, 6:19 PM EDT	Severe Thunderstorm Warning	CTP	McKean, Potter	41 min
Jul 13, 6:27 PM EDT	Severe Thunderstorm Warning	CTP	Somerset	37 min
Jul 13, 6:33 PM EDT	Special Weather Statement	CTP	Clearfield	27 min
Jul 13, 6:35 PM EDT	Special Weather Statement	CTP	Huntingdon	40 min
Jul 13, 6:43 PM EDT	Severe Thunderstorm Warning	CTP	Clinton, Potter, Tioga	47 min
Jul 13, 6:46 PM EDT	Severe Thunderstorm Warning	CTP	Blair, Centre, Clearfield	44 min
Jul 13, 6:46 PM EDT	Severe Thunderstorm Warning	CTP	Blair, Huntingdon	44 min
Jul 13, 6:54 PM EDT	Areal Flood Advisory	CTP	Cameron, Clearfield, Clinton	3 hr
Jul 13, 6:59 PM EDT	Severe Thunderstorm Warning	CTP	Potter	61 min
Jul 13, 7:01 PM EDT	Severe Thunderstorm Warning	CTP	Centre, Clinton	44 min
Jul 13, 7:07 PM EDT	Special Weather Statement	CTP	Clinton	23 min
Jul 13, 7:08 PM EDT	Special Weather Statement	CTP	Somerset	37 min
Jul 13, 7:26 PM EDT	Severe Thunderstorm Warning	CTP	Lycoming, Tioga	64 min
Jul 13, 7:29 PM EDT	Areal Flood Advisory	CTP	Centre, Clinton	3 hr
Jul 13, 7:44 PM EDT	Severe Thunderstorm Warning	CTP	Clinton, Lycoming, Tioga	61 min
Jul 13, 7:55 PM EDT	Flash Flood Warning	CTP	Lycoming, Tioga	2 hr
Jul 13, 7:58 PM EDT	Areal Flood Advisory	CTP	Centre, Clinton	2 hr
Jul 13, 7:59 PM EDT	Severe Thunderstorm Warning	CTP	Centre, Clinton, Mifflin, Snyder, Union	46 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.