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NOUS41 KBOX 241959
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MAZ022-252000-

PUBLIC INFORMATION STATEMENT
NATIONAL WEATHER SERVICE BOSTON/NORTON MA
359 PM EDT WED JUL 24 2019

...NWS DAMAGE SURVEY FOR 07/23/19 TORNADO EVENTS...

...OVERVIEW...

A NATIONAL WEATHER SERVICE DAMAGE SURVEY CONCLUDED THAT TWO
TORNADOES TOUCHED DOWN ON CAPE COD ON TUESDAY, JULY 23.

A LONG-LIVED SUPERCELL THUNDERSTORM PRODUCED WATERSPOUTS ON 
BOTH VINEYARD SOUND AND NANTUCKET SOUND. ONE OF THESE MOVED
ONSHORE AS A TORNADO JUST WEST OF KALMUS IN BARNSTABLE, MA.
IT HAD A DISCONTINUOUS PATH AND LIFTED IN SOUTH YARMOUTH, MA.
THE SAME STORM PRODUCED A SECOND TORNADO IN HARWICH, MA A 
FEW MINUTES LATER. STRAIGHT-LINE WIND DAMAGE WAS OBSERVED IN
DENNIS, MA AND IN CHATHAM, MA. 

.BARNSTABLE AND YARMOUTH TORNADO                                                                 ...

START LOCATION...JUST WEST OF KALMUS IN BARNSTABLE COUNTY MA
END LOCATION...SOUTH YARMOUTH IN BARNSTABLE COUNTY MA
DATE...07/23/2019
ESTIMATED TIME...11:57 AM EDT TO 12:07 PM EDT
MAXIMUM EF-SCALE RATING...EF1
ESTIMATED MAXIMUM WIND SPEED...110 MPH
MAXIMUM PATH WIDTH...250.0 YARDS
PATH LENGTH...5.52 MILES DISCONTINUOUS
BEGINNING LAT/LON...41.6354 / -70.2841
ENDING LAT/LON...41.6769 / -70.1961
* FATALITIES...0
* INJURIES...0

...SUMMARY...
A WATERSPOUT MOVED ONSHORE JUST WEST OF KALMUS, MA AT 1157 AM.
WINDS GUSTED TO 91 MPH AT A MESONET OBSERVATION SITE. THEY 
HAD SHIFTED FROM SOUTHEAST TO WEST-NORTHWEST WITH THE PASSAGE 
OF THE TORNADO. THE TORNADO CONTINUED MOVING NORTHEASTWARD AT 
ABOUT 35 MPH. THE DAMAGE WAS DISCONTINUOUS BUT WHERE THE 
TORNADO TOUCHED DOWN, THE DAMAGE WAS QUITE SIGNIFICANT, 
WITH WINDS ESTIMATED AS HIGH AS 110 MPH, WHICH IS ON THE 
HIGH END OF THE ENHANCED FUJITA SCALE EF-1 RANKING.

THE ROOF OF A MOTEL ON THE SOUTH SIDE OF MAIN STREET IN WEST
YARMOUTH WAS COMPLETELY PEELED OFF. ADDITIONAL SIGNIFICANT 
TORNADO DAMAGE OCCURRED JUST SOUTHWEST OF THE DENNIS-YARMOUTH
REGIONAL HIGH SCHOOL, PARTICULARLY ALONG HAZELMOOR ROAD 
FROM VIOLET GLEN ROAD TO VINE BROOK ROAD. DOZENS OF LARGE 
TREES WERE UPROOTED AND A FEW WERE SNAPPED OFF. A HOUSE HAD
SHINGLES BLOWN OFF. ANOTHER HOUSE HAD A HOLE IN THE ROOF FROM
A FALLEN TREE. 

THE TORNADO THEN LIFTED, HOWEVER SEVERE STRAIGHT-LINE WIND 
DAMAGE WAS OBSERVED FROM WEST DENNIS EASTWARD TO WEST HARWICH.
NUMEROUS LARGE TREES WERE UPROOTED, CONSISTENT WITH 90 MPH
GUSTS OR GREATER. 

NO INJURIES WERE REPORTED WITH THIS STORM.


.HARWICH TORNADO...

START LOCATION...1 SSW HARWICH IN BARNSTABLE COUNTY MA
END LOCATION...2 ENE HARWICH IN BARNSTABLE COUNTY MA
DATE...07/23/2019
ESTIMATED TIME...12:10 PM EDT TO 12:15 PM EDT
MAXIMUM EF-SCALE RATING...EF1
ESTIMATED MAXIMUM WIND SPEED...110 MPH
MAXIMUM PATH WIDTH...250.0 YARDS
PATH LENGTH...2.77 MILES
BEGINNING LAT/LON...41.6851 / -70.0789
ENDING LAT/LON...41.7005 / -70.0299
* FATALITIES...0
* INJURIES...0

...SUMMARY...
THE SAME SUPERCELL STORM THAT PRODUCED THE BARNSTABLE-YARMOUTH
TORNADO WENT ON TO TOUCH DOWN AGAIN NEAR THE CENTER OF 
HARWICH, MA AT 1210 PM. THE INITIAL TOUCHDOWN WAS JUST EAST OF
HARWICH ELEMENTARY SCHOOL, JUST SOUTH OF PARALLEL STREET.
IT MOVED NORTHEAST THROUGH HARWICH CENTER, PASSING JUST SOUTH 
OF A GOLF COURSE, AND LIFTED IN EAST HARWICH IN THE VICINITY
OF QUEEN ANNE ROAD. AT LEAST 150 HARDWOOD TREES WERE EITHER 
UPROOTED OR SNAPPED. A FEW HOMES ALSO HAD SHINGLES THAT WERE
RIPPED OFF. WIND GUSTS WERE ESTIMATED AS HIGH AS 110 MPH,
WHICH IS ON THE HIGH END OF THE ENHANCED FUJITA SCALE EF-1
RANKING.

THE TORNADO THEN LIFTED, HOWEVER SEVERE STRAIGHT-LINE WIND 
DAMAGE WAS OBSERVED IN CHATHAM. NUMEROUS LARGE TREES WERE
UPROOTED, CONSISTENT WITH 90 MPH GUSTS OR GREATER. 

NO INJURIES WERE REPORTED WITH THIS 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.

THE NATIONAL WEATHER SERVICE WOULD LIKE TO EXTEND ITS 
APPRECIATION TO THE MASSACHUSETTS EMERGENCY MANAGEMENT AGENCY,
LOCAL EMERGENCY MANAGEMENT, POLICE AND FIRE DEPARTMENTS, 
SKYWARN AMATEUR RADIO AND TRAINED SPOTTERS, AND THE GENERAL 
PUBLIC FOR HELP IN COMPLETING THIS SURVEY.

$$
AED/BW/WS/GAF/JWD

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