Alert archive / Pennsylvania / Tornado Warnings in 2017

Tornado Warning 10, NWS State College, PA

July 24, 2017Columbia County, Montour County, Northumberland County, Pennsylvania

NWS State College, PA issued this tornado warning at Jul 24, 2017, 3:29 PM EDT for Columbia County, Montour County, Northumberland County, Pennsylvania. It was in force for 46 min. 4 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 24, 2017, 3:29 PM EDT (19:29 UTC)
Expired: Jul 24, 2017, 4:15 PM EDT
In force: 46 min
Issued by: NWS State College, PA
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.0 in

Counties Columbia County, PA, Montour County, PA, Northumberland County, PA

The radar

The State College radar (KCCX), 112 km from the middle of the area, began a volume at 19:30 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 24, 3:40 PM EDT	TSTM WND DMG	Mooresburg, PA	WIDESPREAD TREES AND WIRES DOWN ACROSS MONTOUR COUNTY
Jul 24, 3:57 PM EDT	TORNADO	1 Ne Klines Grove, PA	BRIEF EF0 TOUCHED DOWN NEAR KLINES GROVE.
Jul 24, 4:10 PM EDT	TSTM WND DMG	Danville, PA	TREES AND WIRES DOWN ALONG ROUTE 11
Jul 24, 4:14 PM EDT	TSTM WND DMG	Rupert, PA	TREES AND WIRES DOWN ACROSS RUPERT ROAD AT TRAIN STREET

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, 7.5 hours before the alert went out and 233 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: 57 J/kg
Mixed-layer CIN: -164 J/kg
Mixed-layer LCL: 1219 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: -82 m²/s²
0-3 km storm-relative helicity: 17 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.0

Open this sounding in Storm Lab

The text

As transmitted.

679 
WFUS51 KCTP 241929
TORCTP
PAC037-093-097-242015-
/O.NEW.KCTP.TO.W.0010.170724T1929Z-170724T2015Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service State College PA
329 PM EDT MON JUL 24 2017

The National Weather Service in State College PA has issued a

* Tornado Warning for...
  Central Northumberland County in central Pennsylvania...
  Montour County in central Pennsylvania...
  Central Columbia County in central Pennsylvania...

* Until 415 PM EDT
    
* At 328 PM EDT, a severe thunderstorm capable of producing a tornado
  was located over Montandon, moving east at 20 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. 

* This dangerous storm will be near...
  Riverside and Mooresburg around 350 PM EDT. 
  Danville around 400 PM EDT. 
  Bloomsburg, Buckhorn, Rupert, Fernville, Catawissa, Eyers Grove, 
  Knoebels Grove and Lightstreet around 410 PM EDT. 

Other locations impacted by this tornadic thunderstorm include
Orangeville, Espy, Bloomsburg University and Lime Ridge.

For those driving on Interstate 80, this includes areas between the
Limestoneville and Berwick-Lime Ridge exits, specifically from mile
markers 216 to 238.

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 4095 7687 4100 7687 4112 7638 4085 7636
TIME...MOT...LOC 1928Z 266DEG 19KT 4097 7682 

TORNADO...RADAR INDICATED
HAIL...1.00IN

$$

Dangelo

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 23, 8:07 PM EDT	Areal Flood Advisory	CTP	Columbia, Lycoming, Montour, Northumberland	3 hr
Jul 23, 8:35 PM EDT	Areal Flood Advisory	CTP	Elk	3 hr
Jul 23, 9:15 PM EDT	Areal Flood Advisory	CTP	Snyder, Union	3 hr
Jul 23, 9:24 PM EDT	Areal Flood Warning	CTP	Dauphin	6 hr
Jul 23, 9:30 PM EDT	Areal Flood Advisory	CTP	Cameron, Potter, Tioga	3 hr
Jul 23, 10:09 PM EDT	Flash Flood Warning	CTP	Cameron, Potter, Tioga	4 hr
Jul 23, 10:36 PM EDT	Areal Flood Advisory	CTP	Somerset	3 hr
Jul 23, 10:49 PM EDT	Areal Flood Advisory	CTP	Columbia, Lycoming, Montour, Northumberland	4 hr
Jul 23, 10:58 PM EDT	Areal Flood Warning	CTP	Dauphin, Northumberland	6 hr
Jul 23, 11:33 PM EDT	Areal Flood Advisory	CTP	McKean	4 hr
Jul 23, 11:38 PM EDT	Areal Flood Advisory	CTP	Clinton, Lycoming	3 hr
Jul 24, 12:50 AM EDT	Areal Flood Advisory	CTP	York	115 min
Jul 24, 2:32 AM EDT	Areal Flood Advisory	CTP	Columbia, Lycoming, Montour, Northumberland, Sullivan, Tioga and 1 more	3 hr
Jul 24, 2:43 AM EDT	Areal Flood Advisory	CTP	Clinton	5 hr
Jul 24, 5:28 AM EDT	Areal Flood Advisory	CTP	Columbia, Lycoming, Montour, Northumberland, Sullivan, Union	2 hr
Jul 24, 2:11 PM EDT	Special Weather Statement	CTP	Centre	34 min
Jul 24, 2:15 PM EDT	Special Weather Statement	CTP	Blair	45 min
Jul 24, 2:40 PM EDT	Areal Flood Advisory	CTP	Clinton, Lycoming	3 hr
Jul 24, 2:56 PM EDT	Special Weather Statement	CTP	Blair	49 min
Jul 24, 3:14 PM EDT	Special Weather Statement	CTP	Montour	46 min
Jul 24, 3:17 PM EDT	Special Weather Statement	CTP	Montour	58 min
Jul 24, 3:58 PM EDT	Severe Thunderstorm Warning	CTP	Columbia, Montour, Northumberland, Union	62 min
Jul 24, 4:15 PM EDT	Areal Flood Advisory	CTP	Columbia, Montour, Northumberland, Union	3 hr
Jul 24, 4:42 PM EDT	Flash Flood Warning	CTP	Columbia, Montour, Northumberland, Union	3 hr
Jul 24, 4:56 PM EDT	Severe Thunderstorm Warning	CTP	Columbia, Northumberland, Schuylkill	64 min
Jul 24, 5:37 PM EDT	Special Weather Statement	CTP	Schuylkill	23 min
Jul 24, 6:52 PM EDT	Special Weather Statement	CTP	York	38 min

Nearby

Tornado Warnings in Pennsylvania, 2017 Every tornado warning in 2017 Tornadoes in 2017

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.