Heavy Rain, Hawaii
- When
- August 3, 5:33 PM HST to 8:18 PM HST
- Where
- Hawaii County, 15 mi NNE of Kailua Kona
- Reported by
- OFFICIAL NWS OBS.
- Coordinates
- 19.602, -155.523 (the zone’s center; the record gives no point)
Heavy Rain in Hawaii, August 3, 2004
Heavy showers and isolated thunderstorms, associated with remnants of Hurricane Darby, produced small stream and drainage ditch flooding, and ponding of roadways in the North Kona District on the Big Island of Hawaii, near Puuanahulu. No serious property damage or injuries were reported.
Where it happened
Every event with a place to put it; 1 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.
- Tornadoes
- Tropical storms and surge
- Floods
- Wind
- Hail
- Winter weather
- Heat and drought
- Cold
- Fire, smoke and dust
- Marine and coastal
- Other
The toll
- Deaths
- 0
- Injuries
- 0
- Property damage
- None recorded
- Crop damage
- None recorded
- Events
- 1
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.
What happened
The episode as NWS HFO wrote it up.
Heavy showers and isolated thunderstorms, associated with remnants of Hurricane Darby, produced small stream and drainage ditch flooding, and ponding of roadways in the North Kona District on the Big Island of Hawaii, near Puuanahulu. No serious property damage or injuries were reported.
What forecasters said that day
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 Aug 3, 4:00 PM HST, 1 hour 33 minutes earlier.
Area forecast discussion, Aug 3, 4:00 PM HST, 1 hour 33 minutes before
HAWAIIAN ISLANDS FORECAST DISCUSSION NATIONAL WEATHER SERVICE HONOLULU HI 400 PM HST TUE AUG 3 2004 .SYNOPSIS... THE REMNANTS OF DARBY WILL CONTINUE TO AFFECT THE ISLANDS THROUGH WEDNESDAY AS IT MAKES ITS WESTWARD JOURNEY ACROSS THE ISLANDS. SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS CAN BE EXPECTED. MORE TYPICAL TRADE WIND WEATHER CAN BE EXPECTED THURSDAY AND FRIDAY AS SHOWERS BECOME MORE ISOLATED MAINLY OVER WINDWARD AND MAUKA AREAS. && .DISCUSSION... SHOWERS AND ISOLATED THUNDERSTORMS CONTINUE TO AFFECT THE ISLANDS THIS AFTERNOON AS THE REMNANT MOISTURE OF DARBY INTERACTS WITH AN UNSTABLE ATMOSPHERE IN PLACE OVER THE ISLANDS. THE INSTABILITY IS DUE TO AN UPPER LEVEL TROUGH JUST NORTHWEST OF KAUAI. THE THUNDERSTORMS HAD BEEN AFFECTING MAINLY THE BIG ISLAND THIS MORNING BUT HAVE SHIFTED OVER TO MAUI COUNTY THIS AFTERNOON. THE REST OF THE STATE MAY SEE MORE OF THE ACTIVITY TONIGHT. SHOWERY WEATHER LIKELY LINGER INTO WEDNESDAY ESPECIALLY OVER THE WESTERN END OF THE MAIN ISLAND CHAIN SINCE THE MOISTURE FIELD IS ONLY MOVING GRADUALLY WESTWARD. WINDS ARE BASICALLY LIGHT TRADES ACROSS THE STATE BUT THE REMNANT LOW AND ASSOCIATED THUNDERSTORMS IS CAUSING SOME VARIABILITY IN WIND DIRECTION AND SPEEDS ESPECIALLY AROUND MAUI COUNTY AND THE BIG ISLAND. BY THURSDAY AND FRIDAY MORE TYPICAL TRADE WIND WEATHER IS EXPECTED THANKS TO HIGH PRESSURE FAR NORTH OF THE STATE. TRADE WINDS WILL BE IN THE 10 TO 20 MPH RANGE WITH SHOWERS MAINLY CONFINED TO WINDWARD AND MAUKA AREAS. && .LONG TERM... WE ARE ALSO WATCHING ANOTHER AREA OF SHOWERY WEATHER THAT MAY APPROACH THE ISLANDS OVER THE WEEKEND. TROPICAL DEPRESSION SIX-E IS LOCATED ABOUT 1500 MILES EAST SOUTHEAST OF HONOLULU. THE NATIONAL HURRICANE CENTER IN MIAMI HAS ISSUED ITS LAST ADVISORY ON THIS SYSTEM BUT THE GFS AND NOGAPS MODELS STILL BRING A LARGE AREA OF REMNANT TROPICAL MOISTURE OVER THE STATE LATE FRIDAY INTO SATURDAY BRINGING THE THREAT OF HEAVY RAINFALL ONCE AGAIN TO THE STATE. && .HFO WATCHES/WARNINGS/ADVISORIES... FLASH FLOOD WARNING SOUTHEAST MAUI. HIGH SURF ADVISORY EAST SHORES OF KAUAI OAHU MOLOKAI MAUI AND THE BIG ISLAND. FLASH FLOOD WATCH ALL ISLANDS. && BURKE
In the hours before
Local storm report, Aug 3, 12:12 PM HST, 5 hours 21 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HONOLULU HI
1212 PM HST TUE AUG 03 2004
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION...ST.. ...SOURCE....
..REMARKS..
1127 AM FLASH FLOOD 15 SW HANA 20.62N 156.16W
08/03/2004 MAUI HI EMERGENCY MNGR
MAUI CD REPORTED THE CLOSURE OF PIILANI HWY NEAR KAUPO
DUE TO EXCESSIVE RUNOFF.
&&
KODAMAThe radar
The national radar mosaic for the moment the first event began.
Event by event
1 heavy rain. Local standard time, as filed.
What these are
- Heavy Rain
- Rainfall totals unusual for the place and season that did not produce a flood.
After NWS Directive 10-1605, the rules offices file Storm Data by.
The same day elsewhere
- Tornadoes and Flash Flooding in Iowa, August 3 to 4, 2004
- Flash Flooding and Hail in Wisconsin, August 3, 2004
- Hurricane and Flash Flooding in North Carolina, August 3, 2004
- Damaging Wind in Minnesota, August 3, 2004
- Damaging Wind in South Dakota, August 3, 2004
- Damaging Wind in Minnesota, August 3, 2004
- Damaging Wind in Minnesota, August 3, 2004
- Damaging Winds and Lightning Strike in Iowa, August 3, 2004
- Damaging Wind in South Dakota, August 3, 2004
- Hail and Damaging Winds in Iowa, August 3, 2004
- Lightning Strike in Maine, August 3, 2004
- Damaging Wind in New York, August 3, 2004
More
Every storm in Hawaii in 2004Every state in 2004This day in weather historyWarnings in Hawaii, August 2004
Sources
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 2026-09-24. Each event’s entry at NCEI: 5431596.