Alert archive / Pennsylvania / Tornado Warnings in 2018

Tornado Warning 4, NWS Pittsburgh, PA

June 13, 2018Armstrong County, Indiana County, Pennsylvania

NWS Pittsburgh, PA issued this tornado warning at Jun 13, 2018, 7:27 PM EDT for Armstrong County, Indiana County, Pennsylvania. It was in force for 22 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jun 13, 2018, 7:27 PM EDT (23:27 UTC)
Expired: Jun 13, 2018, 7:49 PM EDT
In force: 22 min
Issued by: NWS Pittsburgh, PA
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

Counties Armstrong County, PA, Indiana County, PA

The radar

The Pittsburgh radar (KPBZ), 90 km from the middle of the area, began a volume at 23:30 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.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jun 13, 6:33 PM EDT	Severe Thunderstorm Watch	SPC	4 hr

The nearest sounding before it

Pittsburgh, PA (KAGC), launched 12:00Z, 11.5 hours before the alert went out and 86 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: 191 J/kg
Mixed-layer CIN: -9 J/kg
Mixed-layer LCL: 496 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 107 m²/s²
0-3 km storm-relative helicity: 112 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

As transmitted.

287 
WFUS51 KPBZ 132327
TORPBZ
PAC005-063-140000-
/O.NEW.KPBZ.TO.W.0004.180613T2327Z-180614T0000Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Pittsburgh PA
727 PM EDT WED JUN 13 2018

The National Weather Service in Pittsburgh has issued a

* Tornado Warning for...
  Northeastern Indiana County in west central Pennsylvania...
  East central Armstrong County in west central Pennsylvania...

* Until 800 PM EDT..

* At 727 PM EDT, a severe thunderstorm capable of producing a tornado
  was located 9 miles east of Kittanning, moving southeast at 35 mph.

  HAZARD...Tornado.

  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 tornadic thunderstorm will remain over mainly rural areas of
  northeastern Indiana and east central Armstrong Counties, including
  the following locations... Chevy Chase Heights, Creekside, Atwood,
  Dayton, Smicksburg, Plumville, Clymer, Marion Center, Dixonville
  and Rural Valley.

Please report severe weather by calling 412-262-1988, posting to 
the NWS Pittsburgh Facebook page, or using Twitter @NWSPITTSBURGH. 

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 4083 7941 4088 7937 4093 7929 4078 7891
      4066 7895 4060 7909
TIME...MOT...LOC 2327Z 302DEG 30KT 4084 7934 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

TAX

2 follow-up statements

719 
WWUS51 KPBZ 132338
SVSPBZ

Severe Weather Statement
National Weather Service Pittsburgh PA
738 PM EDT WED JUN 13 2018

PAC005-063-140000-
/O.CON.KPBZ.TO.W.0004.000000T0000Z-180614T0000Z/
Indiana PA-Armstrong PA-
738 PM EDT WED JUN 13 2018

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 800 PM EDT FOR
NORTHEASTERN INDIANA AND EAST CENTRAL ARMSTRONG COUNTIES...
    
At 737 PM EDT, a severe thunderstorm capable of producing a tornado
was located 12 miles north of Indiana, moving southeast at 35 mph.

HAZARD...Tornado.

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.

Locations impacted include...
Clymer...                         Chevy Chase Heights...
Ernest...                         Marion Center...
Plumville...                      Atwood...
Dixonville...                     Commodore...
Smicksburg...                     

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.

Please report severe weather by calling 412-262-1988, posting to 
the NWS Pittsburgh Facebook page, or using Twitter @NWSPITTSBURGH. 

&&

LAT...LON 4078 7929 4084 7928 4089 7919 4078 7891
      4066 7895 4060 7909
TIME...MOT...LOC 2337Z 302DEG 30KT 4079 7924 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

TAX

997 
WWUS51 KPBZ 132349
SVSPBZ

Severe Weather Statement
National Weather Service Pittsburgh PA
749 PM EDT WED JUN 13 2018

PAC005-063-132359-
/O.CAN.KPBZ.TO.W.0004.000000T0000Z-180614T0000Z/
Indiana PA-Armstrong PA-
749 PM EDT WED JUN 13 2018

...THE TORNADO WARNING FOR NORTHEASTERN INDIANA AND EAST CENTRAL
ARMSTRONG COUNTIES IS CANCELLED...
                
The storm which prompted the warning has weakened below severe limits
and no longer appears capable of producing a tornado. Therefore, the
warning has been cancelled.  However gusty winds and heavy rain are
still possible with this thunderstorm.

A Severe Thunderstorm Watch remains in effect until 1100 PM EDT for
west central Pennsylvania.

LAT...LON 4078 7929 4084 7928 4089 7919 4078 7891
      4066 7895 4060 7909
TIME...MOT...LOC 2344Z 302DEG 30KT 4073 7912 

$$

TAX

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 13, 5:28 PM EDT	Special Weather Statement	PBZ	Butler	47 min
Jun 13, 5:44 PM EDT	Severe Thunderstorm Warning	PBZ	Armstrong, Butler	46 min
Jun 13, 6:05 PM EDT	Severe Thunderstorm Warning	PBZ	Butler, Mercer, Venango	34 min
Jun 13, 6:12 PM EDT	Tornado Warning	PBZ	Armstrong, Indiana	33 min
Jun 13, 6:48 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Beaver	42 min
Jun 13, 6:53 PM EDT	Severe Thunderstorm Warning	PBZ	Armstrong, Clarion, Indiana, Jefferson	52 min
Jun 13, 7:00 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Beaver, Washington	45 min
Jun 13, 7:06 PM EDT	Tornado Warning	PBZ	Armstrong, Clarion, Indiana	24 min
Jun 13, 7:45 PM EDT	Areal Flood Warning	PBZ	Allegheny, Washington	105 min

Nearby

Tornado Warnings in Pennsylvania, 2018 Every tornado warning in 2018 Tornadoes in 2018

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.