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 Mar 22, 8:30 PM HST, 7 hours 20 minutes earlier.
HAWAIIAN ISLANDS FORECAST DISCUSSION NATIONAL WEATHER SERVICE HONOLULU HI 830 PM HST MON MAR 22 2004 .SYNOPSIS... A COMBINATION OF WET TRADE WINDS AND INSTABILITY WILL KEEP HAWAII IN A SHOWERY PATTERN THROUGH THE WEEK AND INTO THE WEEKEND. SHOWERS WILL FAVOR WINDWARD AND MAUKA AREAS...BUT LEEWARD AREAS WILL GET WET AT TIMES AS WELL. TRADE WINDS WILL CONTINUE AT MODERATE TO FRESH STRENGTH. && .DISCUSSION... A 1029 MB HIGH NORTHWEST OF THE MAIN ISLANDS HAS A RIDGE WHICH EXTENDS EAST ALONG 30N TO ANOTHER HIGH OFF THE US MAINLAND...KEEPING THE ISLANDS FIRMLY WITHIN A BELT OF 15 TO 25 MPH TRADE WINDS. THESE TRADES ARE HEAVILY LADEN WITH MOISTURE...THANKS TO THE REMNANTS OF AN OLD SHEARLINE WHICH CONTINUE TO LINGER OVER THE STATE. HEAVY SHOWERS AND ISOLATED THUNDERSTORMS ARE OCCURRING OVER THE EASTERN ISLANDS THIS EVENING...ACTIVITY THAT ACTUALLY BEGAN 24 HOURS OR SO AGO...DUE TO INSTABILITY ASSOCIATED WITH AN UPPER TROUGH WEST OF KAUAI. SOUTHWEST FLOW AT MID AND UPPER IS DIVERGENT OVER THE ISLANDS...LIKELY ENCOURAGING THE UPWARD VERTICAL MOTION NEEDED FOR CONTINUED DEVELOPMENT OF HEAVY SHOWERS AND THUNDERSTORMS. THE CONCENTRATION OF THIS ACTIVITY ALONG WINDWARD SLOPES SHOWS THERE IS AN OROGRAPHIC COMPONENT TO THE DEVELOPMENT OF THESE SHOWERS AND THUNDERSTORMS AS WELL. MODELS SHOW THE MOISTURE FIELD ASSOCIATED WITH THE OLD SHEARLINE WILL REMAIN OVER THE MAIN HAWAIIAN ISLANDS THROUGH THE WEEK...FINALLY PASSING LEEWARD NEXT SUNDAY. SO...WET TRADES WILL BE WITH US FOR AWHILE. IF WE LINK THE DEVELOPMENT OF THUNDERSTORMS AND THE HEAVIEST SHOWERS TO THE PLACEMENT AND MOVEMENT OF THE UPPER TROUGH...THEN THE THREAT OF THE HEAVIEST RAINFALL AMOUNTS SHOULD DECREASE BY THURSDAY AS THE TROUGH GETS FLATTENED AND SHOVED EASTWARD BY AN UPPER LEVEL RIDGE. HOWEVER...THE PATTERN LOOKS LIKE A WET ONE INTO SATURDAY AS LESS INTENSE BUT NUMEROUS TRADE SHOWERS CONTINUE. TRADE WINDS WILL REMAIN BREEZY...IN THE 15 TO 25 MPH RANGE AND OCCASIONALLY A BIT HIGHER. THIS MEANS THAT LEEWARD AREAS...USUALLY A HAVEN FOR FOLKS SEEKING DRYNESS IN A TRADE WIND PATTERN...WILL GET WET AS SHOWERS GET PUSHED WESTWARD FASTER THAN THEY CAN DISSIPATE. && .WATCHES/WARNINGS/ADVISORIES... HIGH SURF ADVISORY...EAST AND NORTH FACING SHORES THROUGH 4 AM HST FLASH FLOOD WATCH....MAUI AND THE BIG ISLAND THROUGH 4 AM HST POWELL
The national radar mosaic for the moment the first event began.
1 heavy rain. Local standard time, as filed.
Heavy showers caused ponding of roadways, and small stream and drainage ditch flooding in windward parts of East and West Maui. 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, March 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: 5431384.