An upper trough over the eastern part of the island chain helped generate a waterspout just west of the Big Island of Hawaii. No significant injuries or property damage were reported.
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Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS HFO wrote it up.
An upper trough over the eastern part of the island chain helped generate a waterspout just west of the Big Island of Hawaii. No significant injuries or property damage were reported.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Honolulu, HI wrote its last area forecast discussion before the first event at Dec 20, 10:00 AM HST, 9 minutes earlier.
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</html>PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HONOLULU HI
716 AM HST SUN DEC 20 2009
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0647 AM TSTM WND GST 3 NE KAHULUI 20.90N 156.43W
12/20/2009 M58.00 MPH MAUI IN MAUI HI ASOS
PHOG ASOS
0658 AM HAIL KAHULUI 20.87N 156.46W
12/20/2009 E0.75 INCH MAUI HI TRAINED SPOTTER
&&
BRAVENDERThe national radar mosaic for the moment the first event began.
1 waterspout. Local standard time, as filed.
The waterspout dissipated soon after the pilot spotted the feature.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Hawaiian Waters in 2009Every state in 2009This day in weather history
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-10-01. Each event’s entry at NCEI: 202029.