NWS Says: First Confirmed Tornado Ever on Block Island, RI | NECN
Weather New England

Weather New England

Meteorologists' Observations on the Weather

NWS Says: First Confirmed Tornado Ever on Block Island, RI

    processing...

    NEWSLETTERS

    The storms that prompted a Tornado Watch for Southern New England on August 10, and a few Tornado Warnings, also produced a confirmed tornado on Block Island, RI.  The National Weather Service investigated the reported damage on the island, along with witness reports, and says this is the first-ever documented tornado on the Island.  Radar imagery certainly supported rotation present in the storm as it moved over the Island.

    PUBLIC INFORMATION STATEMENT
    NATIONAL WEATHER SERVICE TAUNTON MA
    444 PM EDT MON AUG 20 2012

    ...TORNADO CONFIRMED ON BLOCK ISLAND IN WASHINGTON COUNTY
    RHODE ISLAND ON AUGUST 10 2012...

    LOCATION...NEW SHOREHAM IN WASHINGTON COUNTY
    DATE...AUGUST 10 2012
    ESTIMATED TIME...354 PM - 400 PM EDT
    MAXIMUM EF-SCALE RATING...EF0
    ESTIMATED MAXIMUM WIND SPEED...70 MPH
    MAXIMUM PATH WIDTH...20 YARDS
    PATH LENGTH...4 MILES
    BEGINNING LAT/LON...41.15N / 71.57W
    ENDING LAT/LON...41.20N / 71.56W
    * FATALITIES...0
    * INJURIES...0

    * THE INFORMATION IN THIS STATEMENT IS PRELIMINARY AND SUBJECT TO
    CHANGE PENDING FINAL REVIEW OF THE EVENT(S) AND PUBLICATION IN
    NWS STORM DATA.

    ...SUMMARY...
    THE NATIONAL WEATHER SERVICE IN TAUNTON MA HAS CONFIRMED A
    TORNADO ON BLOCK ISLAND IN WASHINGTON COUNTY RHODE ISLAND FROM
    BACK ON AUGUST 10 2012.

    NOTABLY...THIS IS THE FIRST RECORDED TOUCHDOWN OF A TORNADO ON THE
    RECORD BOOKS FOR BLOCK ISLAND.

    A TORNADIC WATERSPOUT OVER THE WATERS SOUTH OF BLOCK ISLAND MOVED
    NORTHWARD ONTO LAND AS A TORNADO OVER THE SOUTHERN PORTION OF THE
    ISLAND AROUND 354 PM. ON LAKESIDE DRIVE THERE WERE A COUPLE OF
    FELLED TREES. DECK FURNITURE WAS THROWN 100 YARDS AWAY. SCREENS
    WERE BLOWN OFF A HOUSE. DAMAGE TO AN ANEMOMETER OCCURRED AT A HOME
    ON SAND`S POND ROAD. THERE WAS ALSO A REPORT OF 50 TREES BLOWN
    DOWN ON A FARM. LAWN DAMAGE WAS REPORTED ON CHAPEL STREET IN NEW
    SHOREHAM ON THE EAST SIDE OF THE ISLAND. AMATEUR RADIO OPERATORS
    REPORTED SEVERAL TREES DOWN IN NEW SHOREHAM AS WELL.

    FARTHER TO THE NORTHEAST THERE WERE EYEWITNESS REPORTS OF A
    ROTATING COLUMN THAT MOVED STEADILY ACROSS A NARROW REGION JUST TO
    THE WEST OF JERRYS POINT. THERE WAS REPORTEDLY A PATH OF FLATTENED
    BRUSH AT LEAST 50 FEET WIDE THERE. RADAR INDICATED THAT THE STORM
    EXITED THE NORTHEAST PART OF BLOCK ISLAND AT 400 PM.

    WE WOULD LIKE TO THANK THE BLOCK ISLAND TIMES FOR PROVIDING MANY
    OF THESE DETAILS IN AN ARTICLE ON AUGUST 17.

    THIS INFORMATION CAN ALSO BE FOUND ON OUR WEBSITE AT
    WEATHER.GOV/BOX.

    FOR REFERENCE...THE ENHANCED FUJITA SCALE CLASSIFIES TORNADOES
    INTO THE FOLLOWING CATEGORIES:

    EF0...WIND SPEEDS 65 TO 85 MPH.
    EF1...WIND SPEEDS 86 TO 110 MPH.
    EF2...WIND SPEEDS 111 TO 135 MPH.
    EF3...WIND SPEEDS 136 TO 165 MPH.
    EF4...WIND SPEEDS 166 TO 200 MPH.
    EF5...WIND SPEEDS GREATER THAN 200 MPH.

    FIELD