000
NOUS41 KPBZ 042036
PNSPBZ
PAZ013-014-050845-

PUBLIC INFORMATION STATEMENT
NATIONAL WEATHER SERVICE PITTSBURGH PA
436 PM EDT TUE MAY 4 2021

...NWS DAMAGE SURVEY FOR 05/03/21...

.LAWRENCE COUNTY TORNADO...

START LOCATION...5 NW PORTERSVILLE IN LAWRENCE COUNTY PA
END LOCATION...5 NW PORTERSVILLE IN LAWRENCE COUNTY PA
DATE...3 MAY 2021
ESTIMATED TIME...937 PM EDT
MAXIMUM EF-SCALE RATING...EF0
ESTIMATED MAXIMUM WIND SPEED...60-65 MPH
MAXIMUM PATH WIDTH...50 YARDS
PATH LENGTH...0.2 MILES
BEGINNING LAT/LON...40.976N / 80.210W
ENDING LAT/LON...40.976N / 80.207W

...SUMMARY...
BASED ON OBSERVED THRESHOLD DAMAGE TO LARGE LIMBS AND IN LIGHT OF
RADAR DATA, A NWS STORM SURVEY CONCLUDED THAT THE DAMAGE IN
NORTHEASTERN LAWRENCE COUNTY LIKELY WAS THE RESULT OF A VERY BRIEF,
WEAK TORNADO THAT LASTED ONLY A SHORT PERIOD OF TIME.

ALTHOUGH RADAR VELOCITY APPEARED AT ITS STRONGEST SUBSEQUENT TO
THIS TIME, ROTATION-TRACK TRANSECTS DISCOVERED NO DAMAGE
DOWNSTREAM FROM THIS INITIAL SPOT OR INTO BUTLER COUNTY.

PHOTOGRAPHS THAT HAVE BEEN SHARED WITH US APPEAR TO DEPICT A WALL
CLOUD WITH RISING CLOUD DEBRIS EARLIER IN THE STORM'S TRACK NEAR
BESSEMER, BUT NO CIRCULATION CAN BE CONFIRMED AT GROUND LEVEL. 
NWS PITTSBURGH IS UNAWARE OF DAMAGE FROM WESTERN LAWRENCE COUNTY,
AND THEREFORE CANNOT CONFIRM A TORNADO ELSEWHERE ALONG THE 
STORM'S PATH. 

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 EVENT AND PUBLICATION IN NWS
STORM DATA.

$$

KRAMAR

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