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 15, 4:00 PM HST, 0 minutes earlier.
HAWAIIAN ISLANDS FORECAST DISCUSSION NATIONAL WEATHER SERVICE HONOLULU HI 4 PM HST SAT MAY 15 2004 .SYNOPSIS... A COLD FRONT OVER OAHU WILL MOVE EAST SLOWLY. HEAVY SHOWERS WILL DIMINISH ON OAHU AND SPREAD TO MAUI COUNTY TONIGHT. IMPROVING CONDITIONS WITH COOLER NORTHERLY WINDS WILL CONTINUE ON KAUAI AND SPREAD TO OAHU TONIGHT...WHILE SHOWERS CONTINUE OVER MAUI COUNTY SUNDAY AND SPREAD TO THE BIG ISLAND BY MONDAY. A RATHER WET WEEK IS IN STORE FOR THE ISLANDS AS THE MOISTURE IS FORECAST TO MOVE BACK WESTWARD OVER THE ISLANDS THROUGH THE WEEK. && .DISCUSSION... A VERY MOIST AIRMASS OVER THE STATE IS HAVING ITS MOISTURE SQUEEZED OUT IN THE FORM OF HEAVY SHOWERS AND THUNDERSTORMS. THE FRONT...OVER OAHU THIS EVENING...WILL MOVE SLOWLY EASTWARD TONIGHT AND SUNDAY... REACHING MAUI BY MORNING...THEN THE BIG ISLAND BY MONDAY. AS THE FRONT MOVES EASTWARD...SLIGHTLY DRIER AIR BEHIND THIS FRONT WILL BRING SOME COOLING RELIEF FROM THE HIGH DEW POINTS AND HUMIDITIES OF THE PAST FEW DAYS. WINDS WILL TURN FROM SOUTH AND SOUTHWEST AHEAD OF THE FRONT TO WEST...THEN NORTH AND FINALLY TO NORTHEAST BEHIND THE FRONT. BY MONDAY...THE FRONT IS EXPECTED TO STALL NEAR THE BIG ISLAND...AS THE PARENT LOW PRESSURE CENTER TURNS WESTWARD AND WEAKENS AS IT IS DRAWN INTO ANOTHER...MORE SIGNIGICANT LOW PRESSURE SYSTEM FARTHER WEST...AND FAR OFF TO OUR NORTHWEST. && .LONG TERM... AS WINDS ALL ACROSS THE STATE TURN EAST AND SOUTHEAST BY MIDWEEK... MOISTURE ASSOCIATED WITH THIS FRONTAL SYSTEM WILL BE BLOWN BACK BACK ACROSS THE STATE FROM EAST TO WEST. THE WARM AND HUMID AIR EAST OF THIS FRONT WILL FOLLOW IN ITS WAKE...FOR MORE WARM AND HUMID WEATHER DURING THE SECOND HALF OF THIS WEEK. SOUTHEASTERLY TO EASTERLY TRADES WILL CONTINUE THROUGH NEXT WEEKEND...WITH CONDITIONS REMAINING RATHER WARM AND MUGGY FOR HAWAII. && .WATCHES/WARNINGS/ADVISORIES... FLASH FLOOD WATCH OAHU AND MAUI COUNTY FOR TODAY AND TONIGHT. FARRELL
The national radar mosaic for the moment the first event began.
1 heavy rain. Local standard time, as filed.
Heavy showers over the entire island of Molokai caused drainage ditch and small stream flooding and ponding of roadways. No serious property damage or injuries were reported.
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: 5431474.