From the book Prevailing Trade Winds:
On the average, fourteen funnel clouds are reported in Hawai'i each year. Of these about six are waterspouts with surface water spray observed, and one may strike land as a tornado. ... One Hawaiian tornado has been filmed and analyzed. It moved onshore in Kailua Bay on the Kona Coast of the Big Island at midday on January 28, 1971. Fortunately only one minor injury occurred, although maximum wind speeds as the storm hit shore were estimated at approximately 200 km/hr (120 mph).
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Other than that F2, another noteworthy tornado was the one that struck Pearl City (a suburb of Honolulu) in January of 1980, damaging homes on Oahu. I believe that one was also an F2, though I'm not certain. Hawaii has not yet had an F3.
According to HawaiianWx ... most Hawaiian tornadoes are F0 and briefly touchdown, and even these are quite rare ...
BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE HONOLULU HI
306 PM HST SAT JUN 7 2003
THE NATIONAL WEATHER SERVICE IN HONOLULU HAS ISSUED A
* TORNADO WARNING FOR...CENTRAL OAHU...WAILUA AND PEARL CITY
* UNTIL 330 PM HST
* AT 301 PM HST...THE PUBLIC REPORTED A TORNADO ABOVE MILILANI OVER
THE KOOLAUS MOVING TOWARD PEARL CITY.
SEEK SHELTER FROM THE TORNADO BY GOING TO THE LOWEST FLOOR OF A
STURDY BUILDING IN AN INTERIOR HALLWAY OR CLOSET. USE BLANKETS OR
PILLOWS TO COVER YOUR BODY AND STAY AWAY FROM WINDOWS.
VEHICLES SHOULD BE EVACUATED FOR A SUBSTANTIAL SHELTER. IF NO SHELTER
IS AVAILABLE...LIE FLAT IN THE NEAREST DITCH OR OTHER LOW SPOT AND
COVER YOUR HEAD.
$$
LAT...LON 2175 15779 2162 15765 2245 15654 2277 15688
FARRELL
