Storm Events Database

Event Details:

Event Tornado
-- Scale EF0
-- Length 0.05 Miles
-- Width 10 Yards
State PENNSYLVANIA
County/Area INDIANA
WFO PBZ
Report Source NWS Storm Survey
NCEI Data Source CSV
Begin Date 2021-07-29 16:20 EST-5
Begin Location 1SSE INDIANA CO ARPT
Begin Lat/Lon 40.617/-79.096
End Date 2021-07-29 16:21 EST-5
End Location 1SSE INDIANA CO ARPT
End Lat/Lon 40.617/-79.095
Deaths Direct/Indirect 0/0 (fatality details below, when available...)
Injuries Direct/Indirect 0/0
Property Damage 50.00K
Crop Damage 1.00K
Episode Narrative A shortwave passage during the morning of July 29th spread mainly non-severe showers and thunderstorms across the region during the morning and midday hours. However, a discrete cell along the back edge of the morning activity was able to develop an EF1 tornado along the Fayette-Westmoreland County border. This was a preview of what was to follow.
In the wake of this morning activity, instability was able to build as partial clearing occurred. Additional thunderstorms were able to develop in association with a prefrontal trough. These storms were able to take advantage of deep shear, especially in the lower levels. A cross-boundary component to this shear allowed discrete supercells to form during the mid and late afternoon hours. Storm motions were favorable for the ingestion of streamwise vorticity, allowing for rotating storms, and the development of additional tornadoes in southwest Pennsylvania and eastern Ohio. Three additional tornadoes occurred in southwest Pennsylvania, causing generally tree and light structural damage. Thankfully, no injuries were reported. A few other damaging wind reports were received as well.
Event Narrative An EF-0 tornado, that was observed by live video and confirmed via damage survey, began in a cornfield near Geesey Road, crossed a farmers property, and dissipated at the end of the property. Minor crop damage was noted near Geesey Road where the tornado began. The tornado then tracked east-southeast where it struck the side of a barn and tossed portions of the roofing and siding 100 feet away from the structure. Finally, some damage was noted on the side of a open barn shed where a 2x4 struck a metal side of a structure. Maximum wind speed was estimated at 75 MPH.


    

Event Map:

Note: The tornado track is approximate based on the beginning (B) and ending (E) locations. The actual tornado path may differ from a straight line.
Measure
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All events for this episode:

Location County/Zone St. Date Time T.Z. Type Mag Dth Inj PrD CrD
Totals: 0 0 470.00K 6.00K
THORNBURGH VENANGO CO. PA 07/29/2021 11:55 EST-5 Tornado EF0 0 0 15.00K 0.00K
WHITE FAYETTE CO. PA 07/29/2021 12:54 EST-5 Tornado EF1 0 0 250.00K 5.00K
ROARING RUN WESTMORELAND CO. PA 07/29/2021 13:00 EST-5 Tornado EF1 0 0 25.00K 0.00K
INDIANA CO ARPT INDIANA CO. PA 07/29/2021 16:20 EST-5 Tornado EF0 0 0 50.00K 1.00K
ARMAGH INDIANA CO. PA 07/29/2021 16:30 EST-5 Thunderstorm Wind 50 kts. EG 0 0 10.00K 0.00K
CRABAPPLE GREENE CO. PA 07/29/2021 17:00 EST-5 Tornado EF1 0 0 100.00K 0.00K
MORRISVILLE GREENE CO. PA 07/29/2021 18:36 EST-5 Thunderstorm Wind 50 kts. EG 0 0 20.00K 0.00K
Totals: 0 0 470.00K 6.00K