Alert archive / Pennsylvania / Tornado Warnings in 2017

Tornado Warning 5, NWS Pittsburgh, PA

May 1, 2017Clarion County, Forest County, Venango County, Pennsylvania

NWS Pittsburgh, PA issued this tornado warning at May 1, 2017, 3:19 PM EDT for Clarion County, Forest County, Venango County, Pennsylvania. It was in force for 26 min. 11 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: May 1, 2017, 3:19 PM EDT (19:19 UTC)
Expired: May 1, 2017, 3:45 PM EDT
In force: 26 min
Issued by: NWS Pittsburgh, PA
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

Counties Clarion County, PA, Forest County, PA, Venango County, PA

The radar

The State College radar (KCCX), 110 km from the middle of the area, began a volume at 19:19 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
May 1, 3:19 PM EDT	TSTM WND DMG	Fryburg, PA	SEVERAL TREES DOWN
May 1, 3:19 PM EDT	TSTM WND DMG	Shippenville, PA	SEVERAL TREES DOWN
May 1, 3:23 PM EDT	TSTM WND DMG	1 E Snydersburg, PA	LIMBS SNAPPED ALONG ROUTE 66
May 1, 3:26 PM EDT	TORNADO	1 N Turkey Ridge, PA	A BRIEF BUT FOCUSED TORNADIC CIRCULATION CAUSED DAMAGE TO TREES OVER A NARROW PATH FROM WITHIN THE WOODED AREA NORTHEAST OF GRAVEL LICK ROAD AND CONTINUING ACROSS ROUTE 36... WHERE NUMEROUS EVERGREEN TREES AND A FEW HARDWOOD TREES WERE SNAPPED IN A LONG... VER
May 1, 3:27 PM EDT	TORNADO	1 Ne Frills Corners, PA	A FOCUSED SWATH OF CONVERGENT DAMAGE...COMPRISED OF SNAPPED HARDWOOD AND SOFTWOOD TREES...WAS SURVEYED ALONG RED PINE CIRCLE. A DISTINCT TRACK SEEMINGLY ASSOCIATED WITH THE SAME PARENT MESOCYCLONE OCCURRED FARTHER NORTH ALONG PINE HOLLOW ROAD... WHERE A SWATH
May 1, 3:27 PM EDT	TORNADO	Cooksburg, PA	A DISTINCT TORNADIC CIRCULATION DEVELOPED IN THE WOODED AREA BETWEEN ROUTE 36 AND FOREST ROAD IN CLARION COUNTY VERY NEAR THE FOREST COUNTY STATE LINE. A VERY NARROW SWATH OF FOCUSED DAMAGE TO TREES... INCLUDING SNAPS AND UPROOTS WAS DISCOVERED IN THIS AREA. T
May 1, 3:30 PM EDT	TSTM WND DMG	1 Sw Guitonville, PA	SPORADIC TREE SNAPS AND UPROOTS IN WOODS ALONG GUITONVILLE ROAD
May 1, 3:38 PM EDT	TSTM WND DMG	1 Wsw Mayburg, PA	TREES DOWN ACROSS ROUTE 666
May 1, 3:40 PM EDT	TSTM WND DMG	5 E Balltown, PA
May 1, 3:42 PM EDT	TSTM WND DMG	Pigeon, PA	NUMEROUS TREES DOWN
May 1, 3:42 PM EDT	HAIL 1.5	Marienville, PA

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
May 1, 12:32 PM EDT	Tornado Watch	SPC	4 hr

The nearest sounding before it

Pittsburgh, PA (KAGC), launched 12:00Z, 7.3 hours before the alert went out and 136 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: 11 J/kg
Mixed-layer CIN: -114 J/kg
Mixed-layer LCL: 1435 m above ground
0-6 km bulk shear: 55 kt
0-1 km storm-relative helicity: 217 m²/s²
0-3 km storm-relative helicity: 191 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

993 
WFUS51 KPBZ 011919
TORPBZ
PAC031-053-121-011945-
/O.NEW.KPBZ.TO.W.0005.170501T1919Z-170501T1945Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Pittsburgh PA
319 PM EDT MON MAY 1 2017

The National Weather Service in Pittsburgh has issued a

* Tornado Warning for...
  Southeastern Venango County in northwestern Pennsylvania...
  Northeastern Clarion County in west central Pennsylvania...
  Central Forest County in northwestern Pennsylvania...

* Until 345 PM EDT..

* At 319 PM EDT, a severe thunderstorm capable of producing a tornado
  was located near Clarion, moving northeast at 55 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 dangerous storm will be near...
  Marienville around 340 PM EDT. 

Other locations impacted by this tornadic thunderstorm include
Fryburg, Shippenville, Kellettville, Leeper and Cook Forest State
Park.

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 4152 7896 4144 7896 4145 7899 4145 7906
      4142 7907 4142 7909 4136 7910 4133 7916
      4134 7917 4133 7917 4134 7918 4133 7919
      4133 7921 4131 7921 4120 7946 4131 7958
      4163 7917 4163 7911
TIME...MOT...LOC 1919Z 231DEG 48KT 4128 7945 

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

$$

TAX

3 follow-up statements

359 
WWUS51 KPBZ 011925
SVSPBZ

Severe Weather Statement
National Weather Service Pittsburgh PA
325 PM EDT MON MAY 1 2017

PAC121-011934-
/O.CAN.KPBZ.TO.W.0005.000000T0000Z-170501T1945Z/
Venango PA-
325 PM EDT MON MAY 1 2017

...THE TORNADO WARNING FOR SOUTHEASTERN VENANGO COUNTY IS
CANCELLED...
    
The tornadic thunderstorm that prompted the warning has moved out of
the area. Therefore, the warning has been cancelled.

A tornado watch remains in effect until 700 PM EDT for northwestern
and west central Pennsylvania.

LAT...LON 4152 7896 4144 7896 4145 7899 4145 7906
      4142 7907 4142 7909 4136 7910 4133 7916
      4134 7917 4133 7917 4134 7918 4133 7919
      4133 7921 4130 7922 4125 7935 4135 7948
      4140 7947 4163 7917 4163 7911
TIME...MOT...LOC 1924Z 231DEG 48KT 4133 7937 

$$

PAC031-053-011945-
/O.CON.KPBZ.TO.W.0005.000000T0000Z-170501T1945Z/
Clarion PA-Forest PA-
325 PM EDT MON MAY 1 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 345 PM EDT FOR
NORTHEASTERN CLARION AND CENTRAL FOREST COUNTIES...
    
At 324 PM EDT, a severe thunderstorm capable of producing a tornado
was located 7 miles north of Clarion, moving northeast at 55 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 dangerous storm will be near...
  Marienville around 340 PM EDT. 

Other locations impacted by this tornadic thunderstorm include
Fryburg, Kellettville, Leeper and Cook Forest State Park.

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 4152 7896 4144 7896 4145 7899 4145 7906
      4142 7907 4142 7909 4136 7910 4133 7916
      4134 7917 4133 7917 4134 7918 4133 7919
      4133 7921 4130 7922 4125 7935 4135 7948
      4140 7947 4163 7917 4163 7911
TIME...MOT...LOC 1924Z 231DEG 48KT 4133 7937 

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

$$

24

460 
WWUS51 KPBZ 011930
SVSPBZ

Severe Weather Statement
National Weather Service Pittsburgh PA
330 PM EDT MON MAY 1 2017

PAC031-053-011945-
/O.CON.KPBZ.TO.W.0005.000000T0000Z-170501T1945Z/
Clarion PA-Forest PA-
330 PM EDT MON MAY 1 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 345 PM EDT FOR
NORTHEASTERN CLARION AND CENTRAL FOREST COUNTIES...
    
At 329 PM EDT, a severe thunderstorm capable of producing a tornado
was located 10 miles southwest of Marienville, moving northeast at 55
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 dangerous storm will be near...
  Marienville around 340 PM EDT. 

Other locations impacted by this tornadic thunderstorm include
Leeper, Cook Forest State Park and Kellettville.

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 4152 7896 4144 7896 4145 7899 4145 7906
      4142 7907 4142 7909 4136 7910 4133 7916
      4134 7917 4133 7917 4134 7918 4133 7919
      4133 7921 4130 7922 4130 7930 4133 7937
      4137 7944 4141 7945 4163 7917 4163 7911
TIME...MOT...LOC 1929Z 231DEG 48KT 4138 7929 

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

$$

24

723 
WWUS51 KPBZ 011942
SVSPBZ

Severe Weather Statement
National Weather Service Pittsburgh PA
342 PM EDT MON MAY 1 2017

PAC031-053-011951-
/O.EXP.KPBZ.TO.W.0005.000000T0000Z-170501T1945Z/
Clarion PA-Forest PA-
342 PM EDT MON MAY 1 2017

...THE TORNADO WARNING FOR NORTHEASTERN CLARION AND CENTRAL FOREST
COUNTIES WILL EXPIRE AT 345 PM EDT...
    
The tornadic thunderstorm that prompted the warning has weakend. 
Therefore, the warning will be allowed to expire.

A tornado watch remains in effect until 700 PM EDT for northwestern
and west central Pennsylvania.

Remember, a Severe Thunderstorm Warning still remains in effect for
Forest county.

LAT...LON 4152 7896 4144 7896 4145 7899 4145 7906
      4142 7907 4142 7909 4136 7910 4133 7916
      4134 7917 4133 7917 4134 7918 4133 7919
      4133 7921 4130 7922 4130 7930 4133 7937
      4137 7944 4141 7945 4163 7917 4163 7911
TIME...MOT...LOC 1941Z 231DEG 48KT 4147 7913 

$$

24

The office that day

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

Issued	Product	Office	Counties	Lasted
May 1, 1:22 PM EDT	Severe Thunderstorm Warning	PBZ	Beaver, Greene, Washington	53 min
May 1, 1:35 PM EDT	Severe Thunderstorm Warning	PBZ	Beaver, Lawrence, Mercer	55 min
May 1, 1:47 PM EDT	Severe Thunderstorm Warning	PBZ	Mercer, Venango	43 min
May 1, 2:05 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Beaver, Butler, Lawrence, Mercer, Venango and 1 more	55 min
May 1, 2:11 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Greene, Washington	49 min
May 1, 2:26 PM EDT	Severe Thunderstorm Warning	PBZ	Clarion, Forest, Mercer, Venango	49 min
May 1, 2:29 PM EDT	Tornado Warning	PBZ	Beaver, Butler	31 min
May 1, 2:47 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Armstrong, Butler, Clarion, Indiana, Venango and 1 more	58 min
May 1, 2:50 PM EDT	Tornado Warning	PBZ	Armstrong, Butler, Clarion, Venango	25 min
May 1, 2:54 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Fayette, Greene, Washington, Westmoreland	66 min
May 1, 3:03 PM EDT	Areal Flood Advisory	PBZ	Allegheny, Butler, Fayette, Greene, Washington, Westmoreland	3 hr
May 1, 3:10 PM EDT	Severe Thunderstorm Warning	PBZ	Armstrong, Clarion, Forest, Jefferson, Venango	65 min
May 1, 3:34 PM EDT	Severe Thunderstorm Warning	PBZ	Armstrong, Clarion, Indiana, Jefferson, Westmoreland	56 min
May 1, 3:42 PM EDT	Special Weather Statement	PBZ	Fayette	48 min
May 1, 5:03 PM EDT	Severe Thunderstorm Warning	PBZ	Fayette	41 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.