1 heavy rain, as filed by the National Weather Service.
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.
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 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 May 19, 10:00 AM HST, 2 hours 32 minutes earlier.
HAWAIIAN ISLANDS FORECAST DISCUSSION NATIONAL WEATHER SERVICE HONOLULU HI 10 AM HST WED MAY 19 2004 .SYNOPSIS... LIGHT WINDS WILL LINGER SOUTH OF A WEAK HIGH PRESSURE RIDGE UNTIL THIS WEEKEND WHEN THE TRADE WINDS RETURN. SHOWERS OVER THE BIG ISLAND WILL SPREAD TO MAUI...LANAI AND MOLOKAI TODAY AND TONIGHT. && .DISCUSSION... A STATIONARY LOW ON THE DATELINE NEAR 40N WILL KEEP THE RIDGE TO OUR NORTH WEAK AND THE WINDS LIGHT THROUGH TOMORROW. THE LOW WILL LIFT SLOWLY NORTH FRIDAY ALLOWING THE RIDGE TO STRENGTHEN AND THE TRADES TO GRADUALLY FILL IN FROM THE EAST. BY SATURDAY...THE LOW WILL HAVE MOVED TO THE ALEUTIAN ISLANDS NEAR 50N...THE RIDGE WILL BE EVEN STRONGER...AND THE TRADES WILL BE BACK. ONCE ESTABLISHED...THE TRADES WILL PERSIST INTO JUNE. OF MORE IMMEDIATE CONCERN...AN OLD FRONTAL BOUNDARY CONSISTING OF SHOWERS AND ISOLATED THUNDERSTORMS WILL WORK ITS WAY FROM THE BIG ISLAND TO MAUI COUNTY TODAY AND TONIGHT. MODELS INDICATE THAT THE SHOWERS...THOUGH FEWER IN NUMBER AND WEAKER IN INTENSITY...WILL REACH OAHU AND KAUAI THURSDAY NIGHT THEN PLAY OUT AS THE TRADES RETURN FRIDAY. && .HFO WATCHES/WARNINGS/ADVISORIES... NONE. CRAIG
The national radar mosaic for the moment the first event began.
1 heavy rain. Local standard time, as filed.
Heavy showers over leeward parts of the Big Island of Hawaii produced ponding of roadways, and small stream and drainage ditch flooding. There were no reports of serious property damage or injuries.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Hawaii in 2004Every state in 2004This day in weather historyWarnings in Hawaii, May 2004
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: 5431475.