595  
NOUS41 KPBZ 171924  
PNSPBZ  
PAZ014-180730-  
 
PUBLIC INFORMATION STATEMENT  
NATIONAL WEATHER SERVICE PITTSBURGH PA  
324 PM EDT SUN OCT 17 2021  
   
..NWS DAMAGE SURVEY FOR BUTLER COUNTY THUNDERSTORM WIND EVENT
 
 
   
CRANBERRY TOWNSHIP
 
 
LOCATION...CRANBERRY TOWNSHIP IN BUTLER COUNTY, PENNSYLVANIA.  
DATE...OCTOBER 16, 2021  
ESTIMATED TIME...625 THROUGH 630 AM EDT.  
ESTIMATED MAXIMUM WIND SPEED...70 TO 80 MPH.  
MAXIMUM PATH LENGTH...APPROXIMATELY 4 MILES.  
* FATALITIES...0  
* INJURIES...0  
   
..SUMMARY
 
 
WIDELY SCATTERED DAMAGE, RANGING FROM DOWNED BRANCHES, TO A FEW  
SNAPPED AND UPROOTED MATURE TREES, WAS OBSERVED ALONG A ROUGHLY 4  
MILE TRACK EXTENDING ACROSS NORTHERN CRANBERRY TOWNSHIP IN BUTLER  
COUNTY. NO DIRECT STRUCTURAL DAMAGE WAS REPORTED OR OBSERVED  
DURING THE SURVEY.  
 
DAMAGE WAS FIRST NOTED TO THE SOUTHEAST OF THE CRANBERRY  
HIGHLANDS GOLF COURSE, EXTENDING NORTHEAST THROUGH SEVERAL  
NEIGHBORHOODS ADJACENT TO GLEN EDEN ROAD. ACROSS US 19 FROM THE  
MANHEIM AUTO AUCTION FACILITY, ISOLATED TREE DAMAGE WAS NOTED IN  
SEVERAL NEIGHBORHOODS OFF EHRMAN ROAD, FRANKLIN ROAD, AND T320  
BETWEEN EVANS CITY AND CALLERY. ALL EXPOSED DAMAGE WAS OBSERVED TO  
BE LAID TO THE NORTHEAST, AND THE LACK OF CONCENTRATED OR  
CONVERGENT DAMAGE IS CONSISTENT WITH A STRAIGHT LINE WIND EVENT  
DRIVEN BY BRIEF DOWNDRAFT PULSES WITHIN THE COLD FRONTAL SURGE.  
 
* THE INFORMATION IN THIS STATEMENT IS PRELIMINARY AND SUBJECT TO  
CHANGE PENDING FINAL REVIEW OF THE EVENT AND PUBLICATION IN NWS  
STORM DATA.  
 

 
   
SUMMIT TOWNSHIP
 
 
LOCATION...EAST BUTLER IN BUTLER COUNTY, PENNSYLVANIA.  
DATE...OCTOBER 16, 2021 ESTIMATED TIME...651 THROUGH 653 AM EDT.  
ESTIMATED MAXIMUM WIND SPEED...70 TO 80 MPH.  
MAXIMUM PATH LENGTH...APPROXIMATELY 1 MILE.  
* FATALITIES...0  
* INJURIES...0  
   
..SUMMARY
 
 
SCATTERED TREE DAMAGE, RANGING FROM DOWNED BRANCHES, TO A FEW  
PARTIALLY SNAPPED AND UPROOTED SMALLER TREES, WAS OBSERVED JUST  
NORTH OF US422 ALONG EAST BUTLER ROAD AND ALONG GRANT AVE. IT WAS  
ALSO NOTED THAT NO DAMAGE WAS FOUND TO VEGETATION OR STRUCTURES AT  
THE RUSTIC RIDGE MOBILE HOME PARK IMMEDIATELY SOUTHWEST OF THE  
TREE DAMAGE DISCOVERED ALONG EAST BUTLER ROAD. SIMILARLY, NO  
STRUCTURAL OR VEGETATION DAMAGE WAS OBSERVED SURROUNDING THE  
ISOLATED TREE DAMAGE DISCOVERED AT A COUPLE RESIDENCES ALONG  
GRANT AVE. THE DAMAGE OBSERVED IS CONSISTENT WITH A BRIEF SURGE IN  
OUTBOUND RADAR VELOCITY DATA FROM THE PITTSBURGH RADAR ALONG THE  
ADVANCING COLD FRONT. WHILE A BRIEF TORNADO MAY HAVE OCCURRED, THE  
SUPPORTING EVIDENCE AND LACK OF A CONCENTRATED OR CONVERGENT  
DAMAGE CANNOT BE CONCLUDED AS A TORNADO.  
 
* THE INFORMATION IN THIS STATEMENT IS PRELIMINARY AND SUBJECT TO  
CHANGE PENDING FINAL REVIEW OF THE EVENT AND PUBLICATION IN NWS  
STORM DATA.  
 

 
 
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