Alert archive / Pennsylvania / Tornado Warnings in 2017

Tornado Warning 13, NWS Pittsburgh, PA

August 22, 2017Fayette County, Greene County, Pennsylvania; Monongalia County, West Virginia

NWS Pittsburgh, PA issued this tornado warning at Aug 22, 2017, 4:43 PM EDT for Fayette County, Greene County, Pennsylvania; Monongalia County, West Virginia. It was in force for 32 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
Aug 22, 2017, 4:43 PM EDT (20:43 UTC)
Expired
Aug 22, 2017, 5:15 PM EDT
In force
32 min
Issued by
NWS Pittsburgh, PA
Area
Storm-based polygon
Tornado
Radar indicated
Hail
0.75 in

Counties Fayette County, PA, Greene County, PA, Monongalia County, WV

The radar

The Pittsburgh radar (KPBZ), 94 km from the middle of the area, began a volume at 20:45 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.

IssuedProductOfficeLasted
Aug 22, 12:39 PM EDTSevere Thunderstorm WatchSPC8 hr

The nearest sounding before it

Pittsburgh, PA (KAGC), launched 12:00Z, 8.7 hours before the alert went out and 79 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-pSkew-T log-p diagram, Pittsburgh, PA at 12:00Z on 2017-08-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 434 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Pittsburgh, PA at 12:00Z on 2017-08-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 87 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
434 J/kg
Mixed-layer CIN
-61 J/kg
Mixed-layer LCL
1009 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
87 m²/s²
0-3 km storm-relative helicity
112 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.5

Open this sounding in Storm Lab

The text

As transmitted.

300 
WFUS51 KPBZ 222043
TORPBZ
PAC051-059-WVC061-222115-
/O.NEW.KPBZ.TO.W.0013.170822T2043Z-170822T2115Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Pittsburgh PA
443 PM EDT TUE AUG 22 2017

The National Weather Service in Pittsburgh has issued a

* Tornado Warning for...
  Southeastern Greene County in southwestern Pennsylvania...
  Southwestern Fayette County in southwestern Pennsylvania...
  Northeastern Monongalia County in northern West Virginia...

* Until 515 PM EDT..

* At 442 PM EDT, a severe thunderstorm capable of producing a tornado
  was located near Cassville, or near Star City, moving east at 40 
  mph. Recent live social media video from the Mount Morris area 
  showed extremely strong winds in the area. 

  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...
  Point Marion around 455 PM EDT. 

Other locations impacted by this tornadic thunderstorm include Mount
Morris, Bobtown and Cheat Lake.

This includes the following highways...
  Interstate 79 in Pennsylvania between mile markers 0 and 2.
 
  Interstate 79 in West Virginia between mile markers 158 and 160.
 
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 3969 8008 3977 8008 3977 7976 3969 7977
      3968 7977
TIME...MOT...LOC 2042Z 268DEG 35KT 3971 8004 

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

$$

Bookbinder
2 follow-up statements
356 
WWUS51 KPBZ 222056
SVSPBZ

Severe Weather Statement
National Weather Service Pittsburgh PA
456 PM EDT TUE AUG 22 2017

PAC051-059-WVC061-222115-
/O.CON.KPBZ.TO.W.0013.000000T0000Z-170822T2115Z/
Greene PA-Fayette PA-Monongalia WV-
456 PM EDT TUE AUG 22 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 515 PM EDT FOR
SOUTHEASTERN GREENE...SOUTHWESTERN FAYETTE AND NORTHEASTERN
MONONGALIA COUNTIES...
    
At 456 PM EDT, a severe thunderstorm capable of producing a tornado
was located over Point Marion, or 7 miles northeast of Star City,
moving east at 40 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
southeastern Greene...southwestern Fayette and northeastern
Monongalia Counties, including the following locations: Cheat Lake.

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 3969 7995 3977 7992 3977 7976 3969 7977
      3968 7977
TIME...MOT...LOC 2056Z 266DEG 34KT 3972 7988 

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

$$

Bookbinder
092 
WWUS51 KPBZ 222113
SVSPBZ

Severe Weather Statement
National Weather Service Pittsburgh PA
513 PM EDT TUE AUG 22 2017

PAC051-059-WVC061-222121-
/O.EXP.KPBZ.TO.W.0013.000000T0000Z-170822T2115Z/
Greene PA-Fayette PA-Monongalia WV-
513 PM EDT TUE AUG 22 2017

...THE TORNADO WARNING FOR SOUTHEASTERN GREENE...SOUTHWESTERN FAYETTE
AND NORTHEASTERN MONONGALIA COUNTIES WILL EXPIRE AT 515 PM EDT...
                
The storm which prompted the warning has weakened below severe limits
and no longer appears capable of producing a tornado. Therefore, the 
warning will be allowed to expire. Conditions may support additional 
severe weather as this storm tracks along the Pennsylvania and West 
Virginia border...toward Markleyburg north of Interstate 68.

LAT...LON 3969 7995 3977 7992 3977 7976 3969 7977
      3968 7977
TIME...MOT...LOC 2111Z 268DEG 35KT 3972 7972 

$$

Bookbinder

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 22, 1:02 PM EDTSevere Thunderstorm WarningPBZBeaver, Lawrence43 min
Aug 22, 1:10 PM EDTSpecial Weather StatementPBZVenango35 min
Aug 22, 1:20 PM EDTSevere Thunderstorm WarningPBZAllegheny, Washington40 min
Aug 22, 1:23 PM EDTSevere Thunderstorm WarningPBZArmstrong, Butler, Clarion, Forest, Mercer, Venango52 min
Aug 22, 1:33 PM EDTSevere Thunderstorm WarningPBZArmstrong, Butler, Clarion42 min
Aug 22, 1:38 PM EDTSevere Thunderstorm WarningPBZBeaver, Lawrence37 min
Aug 22, 1:41 PM EDTSevere Thunderstorm WarningPBZButler34 min
Aug 22, 1:52 PM EDTSevere Thunderstorm WarningPBZClarion, Forest, Jefferson40 min
Aug 22, 1:55 PM EDTSevere Thunderstorm WarningPBZClarion, Forest, Jefferson50 min
Aug 22, 1:57 PM EDTSevere Thunderstorm WarningPBZAllegheny, Washington, Westmoreland48 min
Aug 22, 2:02 PM EDTSevere Thunderstorm WarningPBZArmstrong, Clarion, Indiana, Jefferson43 min
Aug 22, 2:36 PM EDTSevere Thunderstorm WarningPBZIndiana, Westmoreland39 min
Aug 22, 2:37 PM EDTSevere Thunderstorm WarningPBZIndiana, Jefferson38 min
Aug 22, 2:51 PM EDTSevere Thunderstorm WarningPBZJefferson24 min
Aug 22, 2:54 PM EDTSevere Thunderstorm WarningPBZAllegheny, Washington, Westmoreland36 min
Aug 22, 3:24 PM EDTSevere Thunderstorm WarningPBZWestmoreland36 min
Aug 22, 3:40 PM EDTAreal Flood AdvisoryPBZAllegheny, Washington, Westmoreland3 hr
Aug 22, 3:54 PM EDTSevere Thunderstorm WarningPBZIndiana, Westmoreland36 min
Aug 22, 3:55 PM EDTSevere Thunderstorm WarningPBZGreene, Washington35 min
Aug 22, 4:03 PM EDTSpecial Weather StatementPBZForest, Venango27 min
Aug 22, 4:16 PM EDTTornado WarningPBZGreene29 min
Aug 22, 4:26 PM EDTSevere Thunderstorm WarningPBZAllegheny, Fayette, Washington, Westmoreland49 min
Aug 22, 4:29 PM EDTAreal Flood AdvisoryPBZAllegheny3 hr
Aug 22, 4:34 PM EDTSpecial Weather StatementPBZClarion41 min
Aug 22, 5:05 PM EDTSevere Thunderstorm WarningPBZFayette, Westmoreland25 min
Aug 22, 5:08 PM EDTSevere Thunderstorm WarningPBZClarion, Jefferson52 min
Aug 22, 3:44 PM EDTSevere Thunderstorm WarningPBZOhio16 min

Nearby

Tornado Warnings in Pennsylvania, 2017Tornado Warnings in West Virginia, 2017Every tornado warning in 2017Tornadoes 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.