Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 281, NWS State College, PA

September 15, 2021Lebanon County, Schuylkill County, Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at Sep 15, 2021, 6:17 PM EDT for Lebanon County, Schuylkill County, Pennsylvania. It was in force for 43 min. 1 report 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: Sep 15, 2021, 6:17 PM EDT (22:17 UTC)
Expired: Sep 15, 2021, 7:00 PM EDT
In force: 43 min
Issued by: NWS State College, PA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Lebanon County, PA, Schuylkill County, PA

The radar

The State College radar (KCCX), 150 km from the middle of the area, began a volume at 22:20 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
Sep 15, 6:27 PM EDT	TSTM WND DMG	3 E Pine Grove, PA	MULTIPLE REPORTS OF TREES AND WIRES DOWN IN PINE GROVE AND WASHINGTON TOWNSHIPS.

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
Sep 15, 11:55 AM EDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 10.3 hours before the alert went out and 202 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: 13 J/kg
Mixed-layer CIN: -270 J/kg
Mixed-layer LCL: 1457 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 73 m²/s²
0-3 km storm-relative helicity: 106 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

441 
WUUS51 KCTP 152217
SVRCTP
PAC075-107-152300-
/O.NEW.KCTP.SV.W.0281.210915T2217Z-210915T2300Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service State College PA
617 PM EDT Wed Sep 15 2021

The National Weather Service in State College PA has issued a

* Severe Thunderstorm Warning for...
  Southwestern Schuylkill County in central Pennsylvania...
  North central Lebanon County in south central Pennsylvania...

* Until 700 PM EDT.

* At 617 PM EDT, a severe thunderstorm was located near Pine Grove,
  moving east at 35 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...
  Pottsville, Schuylkill Haven, Minersville, St. Clair, Orwigsburg,
  Pine Grove, Port Carbon, Tremont, Fredericksburg, Tower City,
  Tuscarora, New Philadelphia, Friedensburg, Marlin, Renningers,
  Forrestville, Branchdale, Seltzer, Donaldson and McKeansburg.

This includes the following Interstates...
 Interstate 78 from mile markers 4 to 6.
 Interstate 81 from mile markers 90 to 111.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4057 7602 4058 7607 4053 7617 4052 7634
      4050 7643 4049 7644 4046 7638 4043 7655
      4054 7657 4055 7654 4061 7655 4077 7603
      4063 7600
TIME...MOT...LOC 2217Z 255DEG 30KT 4055 7645 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Evanego

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 15, 11:48 AM EDT	Special Weather Statement	CTP	Warren	42 min
Sep 15, 1:11 PM EDT	Special Weather Statement	CTP	Sullivan	49 min
Sep 15, 1:27 PM EDT	Special Weather Statement	CTP	Centre	33 min
Sep 15, 1:44 PM EDT	Severe Thunderstorm Warning	CTP	Centre	31 min
Sep 15, 1:48 PM EDT	Severe Thunderstorm Warning	CTP	Sullivan	42 min
Sep 15, 2:14 PM EDT	Areal Flood Advisory	CTP	Lycoming, Sullivan	2 hr
Sep 15, 2:14 PM EDT	Severe Thunderstorm Warning	CTP	Centre, Clinton	31 min
Sep 15, 2:36 PM EDT	Flash Flood Warning	CTP	Lycoming, Sullivan	66 min
Sep 15, 2:45 PM EDT	Special Weather Statement	CTP	Union	30 min
Sep 15, 2:46 PM EDT	Special Weather Statement	CTP	Sullivan	44 min
Sep 15, 2:54 PM EDT	Severe Thunderstorm Warning	CTP	Clinton, Lycoming, Northumberland, Union	36 min
Sep 15, 3:13 PM EDT	Special Weather Statement	CTP	Union	17 min
Sep 15, 3:20 PM EDT	Severe Thunderstorm Warning	CTP	Juniata, Mifflin	40 min
Sep 15, 3:24 PM EDT	Severe Thunderstorm Warning	CTP	Montour, Northumberland, Union	36 min
Sep 15, 3:30 PM EDT	Special Weather Statement	CTP	Huntingdon	30 min
Sep 15, 3:55 PM EDT	Special Weather Statement	CTP	Snyder	35 min
Sep 15, 3:59 PM EDT	Special Weather Statement	CTP	Columbia, Montour	31 min
Sep 15, 4:03 PM EDT	Areal Flood Advisory	CTP	Lycoming, Sullivan	2 hr
Sep 15, 4:12 PM EDT	Flash Flood Warning	CTP	Columbia, Lycoming, Sullivan	3 hr
Sep 15, 4:18 PM EDT	Severe Thunderstorm Warning	CTP	Columbia	27 min
Sep 15, 4:27 PM EDT	Special Weather Statement	CTP	Perry	33 min
Sep 15, 4:36 PM EDT	Special Weather Statement	CTP	Columbia, Northumberland	24 min
Sep 15, 4:43 PM EDT	Severe Thunderstorm Warning	CTP	Cumberland, Franklin, Perry	32 min
Sep 15, 4:46 PM EDT	Areal Flood Advisory	CTP	Montour, Northumberland	89 min
Sep 15, 4:58 PM EDT	Special Weather Statement	CTP	Northumberland	32 min
Sep 15, 4:59 PM EDT	Special Weather Statement	CTP	Perry	31 min
Sep 15, 5:15 PM EDT	Special Weather Statement	CTP	Perry	30 min
Sep 15, 5:19 PM EDT	Special Weather Statement	CTP	Franklin	26 min
Sep 15, 5:32 PM EDT	Special Weather Statement	CTP	Dauphin	28 min
Sep 15, 5:37 PM EDT	Special Weather Statement	CTP	Schuylkill	23 min
Sep 15, 5:54 PM EDT	Special Weather Statement	CTP	Lebanon	36 min
Sep 15, 6:16 PM EDT	Special Weather Statement	CTP	York	29 min
Sep 15, 6:24 PM EDT	Severe Thunderstorm Warning	CTP	Adams, Franklin	27 min
Sep 15, 6:41 PM EDT	Special Weather Statement	CTP	Dauphin	34 min
Sep 15, 6:54 PM EDT	Special Weather Statement	CTP	Berks	21 min
Sep 15, 7:09 PM EDT	Areal Flood Advisory	CTP	Dauphin, York	96 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.