Alert archive / Pennsylvania / Tornado Warnings in 2023

Tornado Warning 2, NWS State College, PA

June 16, 2023Lancaster County, Pennsylvania

NWS State College, PA issued this tornado warning at Jun 16, 2023, 10:50 AM EDT for Lancaster County, Pennsylvania. It was in force for 25 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: Jun 16, 2023, 10:50 AM EDT (14:50 UTC)
Expired: Jun 16, 2023, 11:15 AM EDT
In force: 25 min
Issued by: NWS State College, PA
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.0 in

County Lancaster County, PA

The radar

The Dover AFB radar (KDOX), 130 km from the middle of the area, began a volume at 14:52 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
Jun 16, 10:52 AM EDT	TSTM WND DMG	2 Nw Quarryville, PA	Trees and wires down on a mobile home. Time estimated by radar.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 2.8 hours before the alert went out and 158 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: 119 J/kg
Mixed-layer CIN: -101 J/kg
Mixed-layer LCL: 910 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 40 m²/s²
0-3 km storm-relative helicity: 101 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted.

397 
WFUS51 KCTP 161450
TORCTP
PAC071-161515-
/O.NEW.KCTP.TO.W.0002.230616T1450Z-230616T1515Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service State College PA
1050 AM EDT Fri Jun 16 2023

The National Weather Service in State College PA has issued a

* Tornado Warning for...
  Southeastern Lancaster County in south central Pennsylvania...

* Until 1115 AM EDT.

* At 1049 AM EDT, severe thunderstorms capable of producing both
  tornadoes and extensive straight line wind damage were located over
  Quarryville, moving east at 30 mph.

  HAZARD...Tornado and quarter size hail.

  SOURCE...Radar indicated rotation.

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be damaged or destroyed. 
           Damage to roofs, windows, and vehicles will occur.  Tree 
           damage is likely.

* These dangerous storms will be near...
  Gap around 1110 AM EDT.

Other locations impacted by this tornadic thunderstorm include Little
Britain, Christiana, White Horse, Kirkwood and Georgetown.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 3974 7616 3991 7624 4016 7590 4014 7587
      4010 7594 4004 7594 3996 7599 3987 7599
      3987 7600 3985 7602 3983 7602 3982 7604
      3981 7603 3980 7605 3976 7606
TIME...MOT...LOC 1449Z 251DEG 25KT 3985 7611 

TORNADO...RADAR INDICATED
MAX HAIL SIZE...1.00 IN

$$

Jurewicz

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 16, 7:02 AM EDT	Areal Flood Advisory	CTP	Bedford, Cambria, Somerset	75 min
Jun 16, 9:50 AM EDT	Special Weather Statement	CTP	York	25 min
Jun 16, 10:21 AM EDT	Special Weather Statement	CTP	Lancaster	39 min
Jun 16, 10:33 AM EDT	Severe Thunderstorm Warning	CTP	Lancaster, York	42 min
Jun 16, 12:55 PM EDT	Special Weather Statement	CTP	Cameron	35 min
Jun 16, 2:38 PM EDT	Special Weather Statement	CTP	Blair	37 min
Jun 16, 3:11 PM EDT	Special Weather Statement	CTP	Blair	34 min
Jun 16, 3:49 PM EDT	Special Weather Statement	CTP	Mifflin	26 min
Jun 16, 3:59 PM EDT	Special Weather Statement	CTP	Mifflin	16 min
Jun 16, 4:35 PM EDT	Special Weather Statement	CTP	Fulton	25 min

Nearby

Tornado Warnings in Pennsylvania, 2023 Every tornado warning in 2023 Tornadoes in 2023

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.