478  
NOUS41 KPBZ 051756  
PNSPBZ  
MDZ001-OHZ039>041-048>050-057>059-068-069-PAZ007>009-013>016-  
020>023-029-031-073>076-WVZ001>004-012-021-509>514-060600-  
 
PUBLIC INFORMATION STATEMENT  
NATIONAL WEATHER SERVICE PITTSBURGH PA  
156 PM EDT FRI OCT 5 2018  
   
..UPDATED NWS DAMAGE SURVEYS FOR 10/02/18 TORNADO EVENT
 
 
BELOW ARE SUMMARIES OF STORM SURVEYS CONDUCTED TO DATE FOR THE  
TORNADIC STORMS ON TUESDAY 10/02/2018. ADDITIONAL SURVEYS WILL BE  
CONDUCTED NEXT WEEK IN FOREST AND VENANGO COUNTIES, AND  
INFORMATION BELOW MAY BE UPDATED FURTHER AFTER CIVIL AIR PATROL  
FLYOVERS ARE CONDUCTED.  
 
SURVEYS IN ARMSTRONG COUNTY (EAST BRADY/BRADY'S BEND AREA) AND  
PRESTON COUNTY (BRANDONVILLE AREA) UNCOVERED NO DAMAGE, AND COULD  
NOT CORROBORATE ANY TORNADO REPORTS RECEIVED BY NWS PITTSBURGH.  
 
   
BROOKVILLE TORNADO #1 (JEFFERSON COUNTY PA)
 
 
START LOCATION...WEST OF BROOKVILLE  
END LOCATION...JUST NORTHEAST OF EXIT 81 ON INTERSTATE 80  
DATE...10/02/18  
ESTIMATED TIME...TO BE DETERMINED. TWO TORNADIC THUNDERSTORMS  
TRACKED OVER ROUGHLY THE SAME AREAS BETWEEN 5 AND 6 PM. WE ARE  
CURRENTLY CORROBORATING VIDEO, PHOTO AND EYE-WITNESS ACCOUNTS TO  
DETERMINE WHICH TORNADO WAS ASSOCIATED WITH WHICH STORM.  
MAXIMUM EF-SCALE RATING...EF0  
BEGINNING LAT/LON...41.166N / 79.121W  
ENDING LAT/LON...41.173N / 79.029W  
* FATALITIES...0  
* INJURIES...0  
   
..SUMMARY
 
 
EYEWITNESS ACCOUNTS AND SEVERAL VIDEOS CONFIRM THAT A TORNADO  
INITIALLY TOUCHED DOWN JUST WEST OF THE MOONLIGHT DRIVE-IN THEATRE  
ALONG US322 JUST WEST OF BROOKVILLE. SPORADIC MINOR TO MODERATE  
TREE DAMAGE WAS OBSERVED ALONG A 4 MILE TRACK TO THE EAST, LAST  
OBSERVED ALONG KIRKMAN RD JUST NORTH OF THE 82 MILE MARKER OF  
INTERSTATE 80. THE TRACK IS PRESUMED TO HAVE CROSSED INTERSTATE 80  
ROUGHLY AT THE NORTH FORK CREEK BRIDGE. TRACK CONTINUATION TO  
THE EAST IS NOT YET ABLE TO BE DETERMINED AT THIS TIME DUE TO THE  
LACK OF ROADS SOUTH AND WEST OF HAZEN. PATH LENGTH AND WIDTH  
DETAILS WILL BE MADE AVAILABLE ONCE FLIGHTS ARE COMPLETED BY CIVIL  
AIR PATROL.  
 
   
BROOKVILLE TORNADO #2 (JEFFERSON COUNTY PA)
 
 
START LOCATION...BAXTER IN JEFFERSON PA  
END LOCATION...SOUTH OF BROOKVILLE IN JEFFERSON PA  
DATE...10/02/18  
ESTIMATED TIME...TO BE DETERMINED. TWO TORNADIC THUNDERSTORMS  
TRACKED OVER ROUGHLY THE SAME AREAS BETWEEN 5 AND 6 PM. WE ARE  
CURRENTLY CORROBORATING VIDEO, PHOTO AND EYE-WITNESS ACCOUNTS TO  
DETERMINE WHICH TORNADO WAS ASSOCIATED WITH WHICH STORM.  
MAXIMUM EF-SCALE RATING...EF2  
ESTIMATED MAXIMUM WIND SPEED...110 MPH  
MAXIMUM PATH WIDTH...AT LEAST 200 YARDS  
PATH LENGTH...AT LEAST 4.0 MILES  
BEGINNING LAT/LON...41.142N / 79.168W  
ENDING LAT/LON...41.135N / 79.090W  
* FATALITIES...0  
* INJURIES...0  
   
..SUMMARY
 
 
EYEWITNESS ACCOUNTS AND SEVERAL VIDEOS CONFIRMED THAT A TORNADO  
TRACKED FROM BAXTER TO JUST SOUTH OF BROOKVILLE. DRONE FOOTAGE  
CONFIRMS THE BEGINNING OF THE TRACK JUST WEST OF MONREAN RD  
APPROXIMATELY 1/4 MILE NORTH OF ROUTE 28. WIDESPREAD AND  
SIGNIFICANT TREE DAMAGE, INCLUDING NUMEROUS SNAPPED AND UPROOTED  
MATURE TREES, WAS OBSERVED IN THIS LOCATION. TWO RESIDENTIAL  
STRUCTURES LOST ROOFS AND FASCIA. THE TORNADO CONTINUED EASTWARD  
ACROSS ROUTE 28 AND THE JEFFERSON CEMETERY. NEARLY COMPLETE TREE  
LOSS WAS OBSERVED ADJACENT TO AND WITHIN THE CEMETERY, INCLUDING  
THE SNAPPING OF NUMEROUS MATURE SOFTWOOD PINES. IN ADDITION,  
APPROXIMATELY 100 GRANITE GRAVESTONES, AVERAGING ONE FOOT BY TWO  
FOOT BY 4 INCHES IN SIZE, WERE OVERTURNED, WITH ONE OBSERVED  
HAVING ROLLED 5 TIMES AND DISPLACED APPROXIMATELY 15 FEET. DRONE  
FOOTAGE AND GROUND SURVEYS INDICATE TREE DAMAGE CONTINUED EAST  
ACROSS RED BANK CREEK ENDING PRIOR TO FIVE MILE RUN RD. THIS IS  
COINCIDENT WITH TORNADO VIDEO PROVIDED VIA SOCIAL MEDIA. TOTAL  
PATH LENGTH FOR THIS TORNADO WAS APPROXIMATELY 4 MILES, WITH A  
PATH WIDTH OF AT LEAST 200 YARDS. ADDITIONAL TORNADO PATH TRACKS  
TO THE WEST OR EAST WERE NOT AVAILABLE DUE TO THE LACK OF ROADS,  
AND ADDITIONAL INFORMATION WILL BE PROVIDED AFTER FLIGHTS ARE  
COMPLETED BY CIVIL AIR PATROL.  
 
NWS PITTSBURGH IS GRATEFUL TO JEFFERSON COUNTY EMA AND THE  
VOLUNTEERS FROM BROOKVILLE AND FALLS CREEK FOR THEIR ASSISTANCE  
IN THIS SURVEY. WE ALSO EXTEND OUR GRATITUDE TO THE PUBLIC WHO  
SUBMITTED DAMAGE REPORTS AND VIDEOS OF THE TORNADOES TO AID IN  
OUR SURVEY EFFORT.  
 
   
GRAYSVILLE TORNADO (GREENE COUNTY PA)
 
 
   
..DETAILS HAVE BEEN UPDATED WITH ADDITIONAL INFORMATION
 
 
START LOCATION...NEAR MARTIN RD IN GRAYSVILLE PA  
END LOCATION...ALONG GRANGE RD IN GRAYSVILLE PA  
DATE...10/02/18  
ESTIMATED TIME...526 PM - 528 PM EDT  
MAXIMUM EF-SCALE RATING...EF1  
ESTIMATED MAXIMUM WIND SPEED...90 MPH  
MAXIMUM PATH WIDTH...200 YARDS  
PATH LENGTH...1.7 MILES  
BEGINNING LAT/LON...39.945N / 80.396W  
ENDING LAT/LON...39.941N / 80.365W  
* FATALITIES...0  
* INJURIES...0  
   
..SUMMARY
 
 
VISIBLE TREE DAMAGE BEGAN ALONG A HILLTOP NEAR MARTIN RD, BUT  
BECAME CONCENTRATED IN THE VALLEY ALONG STRINGTOWN ROAD NORTHEAST  
OF GRAYSVILLE PA, WHERE NUMEROUS HARDWOOD AND SOFTWOOD TREES WERE  
SNAPPED OR UPROOTED. A HOME IN THIS LOCATION LOST ITS DECK ROOF  
AND FASCIA.  
 
SEVERAL OUTBUILDINGS WERE DESTROYED, INCLUDING A SHED THAT WAS  
FOUND MANGLED UPWIND FROM ITS PRIOR LOCATION, AND AN OPEN METAL  
CANOPY THAT WAS REMOVED, MANGLED AND DEPOSITED IN A FIELD  
DOWNSTREAM. ANOTHER OUTBUILDING EXHIBITED METAL ROOF PANEL  
PEELING.  
 
THE DAMAGE CONTINUED SPORADICALLY UNTIL GRANGE ROAD, WHERE  
THRESHOLD TREE DAMAGE WAS NOTED.  
 
MUCH OF THE PATH OF THIS STORM WAS IN SPARSELY ACCESSIBLE AREAS,  
AND ADDITIONAL INFORMATION FROM CIVIL AIR PATROL FLYOVERS MAY  
FURTHER ENHANCE THIS PRELIMINARY INFORMATION.  
 
NWS PITTSBURGH IS GRATEFUL TO GREENE COUNTY EMA FOR ITS ASSISTANCE  
IN THIS SURVEY, AND TO THE PUBLIC WHO SUBMITTED DAMAGE REPORTS AND  
VIDEO OF THE TORNADO TO AID IN OUR SURVEY EFFORT.  
 
   
DONEGAL LAKE AREA TORNADO (WESTMORELAND COUNTY PA)
 
 
   
..UPDATE TO MAXIMUM WIND SPEED/RATING BASED ON DRONE SURVEY
 
 
START LOCATION...NEAR STAIRS RD IN DONEGAL TOWNSHIP PA  
END LOCATION...NEAR DONEGAL LAKE RD AND HARR RD  
DATE...10/02/18  
ESTIMATED TIME...555 PM - 559 PM EDT  
MAXIMUM EF-SCALE RATING...EF2  
ESTIMATED MAXIMUM WIND SPEED...110-120 MPH  
MAXIMUM PATH WIDTH...250 YARDS  
PATH LENGTH...~1.6 MILES  
BEGINNING LAT/LON...40.143N / 79.399W  
ENDING LAT/LON...40.136N / 79.371W  
* FATALITIES...0  
* INJURIES...0  
   
..SUMMARY
 
 
VISIBLE TREE DAMAGE BEGAN ON A HILLTOP WEST OF STAIRS ROAD IN  
DONEGAL TOWNSHIP. THE TORNADO INTENSIFIED RAPIDLY AS IT DESCENDED  
INTO THE VALLEY, WITH WIDESPREAD BLOWDOWN OF HARDWOOD AND SOFTWOOD  
TREES CUTTING A SHARP PATH THROUGH THE FOREST. DRONE FOOTAGE  
OBTAINED TODAY SHOWS REMARKABLE TREE DAMAGE IN THIS AREA WITH  
CLEAR CONVERGENCE IN THE DEBRIS FIELD.  
 
CONTINUOUS, BUT WEAKER TREE DAMAGE WAS FOUND THROUGH THE VALLEY TO  
NEAR THE INTERSECTION OF HARR ROAD AND DONEGAL LAKE ROAD, WHERE  
THE CIRCULATION SHRANK AND WEAKENED.  
 
THE BLOWDOWN ADJACENT TO STAIRS ROAD WAS CONSISTENT WITH WIND OF  
110-120 MPH, WHICH SUGGESTS A PEAK RATING OF EF2 FOR THIS TORNADO.  
 
NWS PITTSBURGH IS GRATEFUL TO THE WESTMORELAND COUNTY EMA FOR  
THEIR ASSISTANCE WITH THE STORM SURVEYS AND FOR DRONE FOOTAGE, AND  
TO THE PUBLIC FOR ALERTING US OF DAMAGE AND PROVIDING VIDEO AND  
PHOTOS.  
 
   
VALLEY GREEN ROAD AREA TORNADO (WESTMORELAND COUNTY PA)
 
 
START LOCATION...ALONG IVY LANE/BRINKERTON ROAD IN UNITY TOWNSHIP PA  
END LOCATION...ALONG PATTERN SHOP ROAD IN HEMPFIELD TOWNSHIP PA  
DATE...10/02/18  
ESTIMATED TIME...537 PM - 539 PM EDT  
MAXIMUM EF-SCALE RATING...EF1  
ESTIMATED MAXIMUM WIND SPEED...85-90 MPH  
MAXIMUM PATH WIDTH...150 YARDS  
PATH LENGTH...~1.0 MILES  
BEGINNING LAT/LON...40.244N / 79.530W  
ENDING LAT/LON...40.257N / 79.525W  
* FATALITIES...0  
* INJURIES...0  
   
..SUMMARY
 
 
A BRIEF EF1 TORNADO WITH MAX WIND OF 85-90 MPH WAS DOCUMENTED  
FROM NEAR IVY LANE AND BRINKERTON ROAD TO NEAR PATTERN SHOP ROAD  
AND VALLEY GREEN ROAD.  
 
ALONG IVY LANE, SEVERAL SOFTWOOD TREE TRUNKS WERE SNAPPED, AND A  
FEW HARDWOOD TREES WERE UPROOTED. FARTHER NORTH ALONG BRINKERTON  
ROAD, THE TORNADO STRENGTHENED TO ITS PEAK WIND SPEED AS IT  
DESCENDED INTO A VALLEY AND CARVED A SHORT, FOCUSED PATH OF  
SNAPPED AND UPROOTED TREES.  
 
TREE DAMAGE CONTINUED AFTER THE TORNADO CROSSED BRINKERTON ROAD,  
BUT WIND SPEED WEAKENED AT THIS TIME. THE LAST OBSERVED DAMAGE WAS  
NOTED NEAR PATTERN SHOP ROAD AND VALLEY GREEN ROAD AS THE TORNADO  
ENCOUNTERED A HILLSIDE. A FEW SNAPPED LIMBS WERE NOTED AT THE END  
OF ITS PATH.  
 
THIS TORNADO WAS UNUSUAL NOT ONLY FOR ITS NORTHWARD MOVEMENT IN  
AN EASTWARD-MOVING STORM, BUT ESPECIALLY BECAUSE IT FORMED ON THE  
NORTHERN SIDE OF THE PARENT THUNDERSTORM, REMOVED FROM THE  
TYPICAL HOOK ECHO REGION.  
 
NWS PITTSBURGH EXTENDS THANKS TO THE WESTMORELAND COUNTY EMA FOR  
ITS ASSISTANCE AND DRONE VIDEO PROVIDED DURING THE SURVEY, AND TO  
THE PUBLIC FOR THEIR EYEWITNESS ACCOUNTS.  
 
   
BRINKER ROAD AREA TORNADO (WESTMORELAND COUNTY PA)
 
 
START LOCATION...ALONG BRINKER ROAD IN HEMPFIELD TOWNSHIP PA  
END LOCATION...ALONG ARMBRUST-HECLA ROAD IN MT. PLEASANT TOWNSHIP PA  
DATE...10/02/18  
ESTIMATED TIME...538 PM - 540 PM EDT  
MAXIMUM EF-SCALE RATING...EF0  
ESTIMATED MAXIMUM WIND SPEED...65-75 MPH  
MAXIMUM PATH WIDTH...250 YARDS  
PATH LENGTH...~0.8 MILES  
BEGINNING LAT/LON...40.211N / 79.560W  
ENDING LAT/LON...40.219N / 79.550W  
* FATALITIES...0  
* INJURIES...0  
   
..SUMMARY
 
 
FROM EYEWITNESS REPORTS AND VISIBLE DAMAGE, A BRIEF TORNADO BEGAN  
NEAR A HILLTOP ALONG BRINKER ROAD AND CONTINUED NORTHEASTWARD  
TOWARD RT 819.  
 
SEVERAL TREES, BOTH SOFTWOOD AND HARDWOOD, IN THE AREA OF GOLD  
LEAF LANE WERE SNAPPED AND MANY OTHERS WERE UPROOTED. THE TORNADO  
GREW SMALLER RAPIDLY AS IT CROSSED RT 819 AND LEVELED TREES IN THE  
WOODS BEHIND HOMES ALONG ARMBRUST-HECLA ROAD BEFORE IT WEAKENED  
QUICKLY. NO ADDITIONAL DAMAGE POINTS WERE FOUND BY THE SURVEY TEAM  
AFTER THIS POINT.  
 
TREE DAMAGE WAS FOUND ALONG STONE CHURCH ROAD, BUT APPEARS TO HAVE  
BEEN PRODUCED BY STRONG WIND OUTSIDE OF THE TORNADIC CIRCULATION,  
PERHAPS ASSOCIATED WITH THE REAR-FLANK DOWNDRAFT OR A CORE  
COLLAPSE IN THE FORWARD FLANK OF THE STORM.  
 
EF SCALE: THE ENHANCED FUJITA SCALE CLASSIFIES TORNADOES INTO THE  
FOLLOWING CATEGORIES:  
 
EF0...WEAK......65 TO 85 MPH  
EF1...WEAK......86 TO 110 MPH  
EF2...STRONG....111 TO 135 MPH  
EF3...STRONG....136 TO 165 MPH  
EF4...VIOLENT...166 TO 200 MPH  
EF5...VIOLENT...>200 MPH  
 
* THE INFORMATION IN THIS STATEMENT IS PRELIMINARY AND SUBJECT TO  
CHANGE PENDING FINAL REVIEW OF THE EVENTS AND PUBLICATION IN NWS  
STORM DATA.  
 

 
 
KRAMAR/BOOKBINDER/MCMULLEN/BROWN/AAM  
 
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