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 Apr 2, 8:30 PM HST, 3 hours 10 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE HONOLULU HI 830 PM HST SUN APR 2 2006 .SYNOPSIS... THUNDERSTORMS REMAIN A POSSIBILITY FOR ALL ISLANDS THROUGH TONIGHT. TRADE WINDS WEATHER SHOULD RETURN MONDAY...AND CONTINUE THROUGH THE REST OF THE WEEK. && .DISCUSSION... AT THIS WRITING...THE HEAVY RAIN HAS ENDED ON KAUAI AND OAHU. A FLASH FLOOD WARNING FOR KAUAI REMAINS IN EFFECT AS WE WAIT FOR FLOOD WATERS TO RECEDE. A FLASH FLOOD WARNING FOR OAHU WILL BE CANCELLED SHORTLY. A FLASH FLOOD WARNING IS IN EFFECT FOR MAUI...ESPECIALLY EAST MAUI INCLUDING HANA. A FLOOD ADVISORY IS ALSO IN EFFECT FOR EAST HAWAII...ESPECIALLY OVER THE HILO AND PUNA DISTRICTS. A NUMBER OF SPECIAL MARINE WARNINGS ARE IN EFFECT FOR WATERS AROUND MAUI AND THE BIG ISLAND. ALL OF THIS SEVERE WEATHER CAN BE ATTRIBUTED TO A MID AND UPPER LEVEL LOW THAT WAS JUST NORTHWEST OF KAUAI LAST NIGHT...AND HAS SINCE MOVED/REFORMED OVER MAUI COUNTY. THE LOW IS MOVING SLOWLY TO THE SOUTH. THE LOCATION OF THE LOW PUTS MAUI COUNTY AND THE BIG ISLAND AT GREATEST RISK THIS EVENING. THE AIRMASS OVER THE ENTIRE STATE REMAINS WET AND UNSTABLE HOWEVER...SO ALL ISLANDS REMAIN UNDER THE GUN. HENCE THE FLASH FLOOD WATCH FOR ALL ISLANDS UNTIL 4 AM MONDAY. PLEASE NOTE THAT THE WEATHER RADAR AT UPOLU POINT ON THE BIG ISLAND HAS BEEN DOWN SINCE ABOUT 520 PM...SO WE ARE NOT SEEING ALL OF THE HEAVY RAIN NORTH OF THE BIG ISLAND AND MAUI. .PREVIOUS DISCUSSION... THE MODELS ARE IN GOOD AGREEMENT WITH THE DEVELOPMENT OF A SURFACE HIGH NORTH OF THE ISLANDS OVER THE NEXT COUPLE OF DAYS. AS THIS HIGH STRENGTHENS...WE CAN EXPECT THE TRADE WINDS TO STRENGTHEN. THE HIGH IS FORECAST TO BE NORTH OF THE ISLANDS THROUGH THE WEEK. THERE IS ALSO FAIRLY GOOD AGREEMENT THAT THE UPPER LEVEL LOW WILL WEAKEN AND MOVE AWAY FROM THE ISLANDS. AS IT WEAKENS...THE THREAT FOR THUNDERSTORMS AND HEAVY RAIN WILL DIMINISH. MODELS SUGGEST AN UPPER LEVEL TROUGH WILL DIG DOWN OVER THE EASTERN END OF THE STATE MID WEEK. WILL HOLD OFF ON ENHANCING TRADE SHOWERS FOR NOW...BUT WILL BE MONITORING FOR THAT POSSIBILITY. && .HFO WATCHES/WARNINGS/ADVISORIES... FLASH FLOOD WATCH ALL HAWAIIAN ISLANDS THROUGH 4 AM MONDAY MORNING. && CRAIG
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HONOLULU HI
737 PM HST SUN APR 02 2006
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0245 PM FLASH FLOOD 1 E MAUNAWILI 21.37N 157.75W
04/02/2006 OAHU IN HONOLULU HI NWS EMPLOYEE
MUDSLIDE ON THE RIGHT LANE OF THE KALANAIANAOLE HIGHWAY.
0300 PM FLASH FLOOD MAUNAWILI 21.37N 157.77W
04/02/2006 HONOLULU HI NWS EMPLOYEE
MAUNAWILI NEIGHBORHOOD PARK UNDER 3 FT OF WATER DUE TO
MAUNAWILI STREAM OVERFLOWING.
0300 PM FLASH FLOOD MAUNAWILI 21.37N 157.77W
04/02/2006 OAHU IN HONOLULU HI NWS EMPLOYEE
LUANA HILLS ROAD CLOSED. 4-5 FT OF WATER ON THE ROAD DUE
TO OVERFLOWING OF MAUNAWILI STREAM.
0344 PM FLASH FLOOD WAIMANALO 21.35N 157.73W
04/02/2006 OAHU IN HONOLULU HI FIRE DEPT/RESCUE
EVACUATION NEAR RESERVOIR AT WAIKUPANAHA ST.
0712 PM FLASH FLOOD HANALEI 22.21N 159.50W
04/02/2006 KAUAI HI EMERGENCY MNGR
KUHIO HIGHWAY CLOSED AT HANALEI BRIDGE.
&&
HFOThe national radar mosaic for the moment the first event began.
1 heavy rain. Local standard time, as filed.
Heavy showers and isolated thunderstorms over northern parts of Kauai caused ponding on roadways, and small stream and drainage ditch flooding. There were no reports of significant property damage or injuries.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Hawaii in 2006Every state in 2006This day in weather historyWarnings in Hawaii, April 2006
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: 5496456.