1 flash flood, as filed by the National Weather Service.
Every event with a place to put it. 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, 4:00 PM HST, 2 hours 28 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE HONOLULU HI 400 PM HST SUN APR 2 2006 .SYNOPSIS... THUNDERSTORMS REMAIN A POSSIBILITY THROUGHOUT THE NIGHT ACROSS THE MAIN HAWAIIAN ISLANDS. EXPECT A RETURN TO MORE TYPICAL TRADE WIND WEATHER STARTING MONDAY. TRADES ARE EXPECTED TO CONTINUE THROUGHOUT THE WORK WEEK. && .DISCUSSION... AROUND 900 AM THIS MORNING...A THUNDERSTORM DEVELOPED AND MOVED ONSHORE BETWEEN KANEOHE AND KAILUA. THE THUNDERSTORMS AND SHOWERS EXPANDED QUICKLY TO COVER MOST OF THE WINDWARD SIDE OF OAHU... PROMPTING THE ISSUANCE OF A FLASH FLOOD WARNING FOR THAT AREA. THE WILSON TUNNEL RAIN GAGE REPORTED A RAINFALL RATE OF 3.12 INCHES PER HOUR AT 1115 WITH THIS STORM. SHORTLY AFTER THE THUNDERSTORMS DEVELOPED OVER WINDWARD OAHU...THUNDERSTORM ACTIVITY DEVELOPED OVER THE SOUTH SHORE OF KAUAI...WITH SHOWERS OVER INTERIOR PARTS OF THE GARDEN ISLE. THUNDERSTORMS OVER THE WINDWARD SIDE OF OAHU CONTINUED TO FORM DURING THE EARLY AFTERNOON. THESE EVENTS...COMBINED WITH THE RECENT RAINS ACROSS THE ISLANDS...SUPPORT THE CONTINUATION OF THE FLASH FLOOD WATCH FOR NIIHAU...KAUAI...AND OAHU. THE RAIN GAGE AT WILSON TUNNEL REPORTED 3.97 INCHES OF RAIN BETWEEN 8 AM THIS MORNING AND 2 PM THIS AFTERNOON. THIS WAS THE MOST RAIN REPORTED BY ANY GAGE ON OAHU TODAY. OTHER SIGNIFICANT REPORTS FOR THE SAME TIME PERIOD ARE 2.66 AT MAUNAWILI...AND 2.18 AT LULUKU. OTHER WINDWARD GAGES REPORTED RAIN TOTALS LESS THAN 1.13 INCHES. AROUND 1 PM...THUNDER WAS HEARD ON THE BIG ISLAND...AND THUNDERSTORMS/HEAVY RAIN DEVELOPED OVER MOLOKAI SHORTLY THEREAFTER. AN AREA OF CONVECTION WAS ABOUT 100 MILES NORTHEAST OF MAUI AT 2 PM...AND THIS AREA WAS MOVING TOWARDS THE ISLANDS AROUND 15 MILES AN HOUR. IF THIS AREA HOLDS TOGETHER...AND IF THE MOVEMENT CONTINUES... IT IS EXPECTED TO ARRIVE IN THE MAUI COUNTY/BIG ISLAND AREA EARLY THIS EVENING. EARLIER IN THE DAY...THIS AREA WAS MOVING TOWARDS THE SOUTHEAST...BUT MORE RECENTLY IT HAS BEEN MOVING TO THE SOUTH. THE WEAK UPPER LEVEL TROUGH OVER THE ISLANDS HAS MOVED DOWN THE ISLAND CHAIN DURING THE DAY TODAY. ACARS SOUNDINGS FROM THE LIHUE AREA SUGGEST MORE STABLE WEATHER IS ALREADY ESTABLISHING ITSELF OVER KAUAI THIS AFTERNOON. EQUIPMENT MALFUNCTION WILL PREVENT A SOUNDING FROM PHLI THIS AFTERNOON. AN ACARS SOUNDING FROM THE KONA AREA SHOWS UNSTABLE CONDITIONS SETTING UP NEAR THE BIG ISLAND. AS A RESULT OF THESE ISSUES...AND THE WEATHER OVER MAUI COUNTY AND THE BIG ISLAND...HAVE EXPANDED THE FLASH FLOOD WATCH TO INCLUDE ALL THE MAIN HAWAIIAN ISLANDS...AND HAVE EXTENDED IT THROUGH 4 AM MONDAY MORNING. THE AREA OF CONVECTION NORTHEAST OF MAUI COUNTY IS OF SPECIAL CONCERN THIS AFTERNOON...AND HAS PROMPTED US TO INCREASE POPS/SKY TONIGHT...AND INCLUDE THE WORDING FOR LOCALLY HEAVY RAINFALL. THE INSTABILITY OF THE SYSTEM HAS ALSO LED US TO PUT THUNDERSTORMS INTO THE FORECAST THROUGH TONIGHT. 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 EXPECTED TO BE NORTH OF THE ISLANDS THROUGH THE WEEK. THERE IS ALSO FAIRLY GOOD AGREEMENT THAT THE WEAK UPPER LEVEL TROUGH OVER THE ISLANDS TODAY WILL CONTINUE IT/S WEAKENING TREND OVERNIGHT. AS IT WEAKENS...THE THREAT FOR THUNDERSTORMS AND HEAVY RAIN WILL DIMINISH. THE MODELS DO SUGGEST AN UPPER LEVEL TROUGH WILL ONCE AGAIN DIG DOWN OVER THE EASTERN END OF THE STATE MID WEEK. WILL HOLD OFF FOR RIGHT NOW ON ENHANCING THE TRADES FOR MID WEEK...BUT WILL BE MONITORING FOR THAT POSSIBILITY. && .HFO WATCHES/WARNINGS/ADVISORIES... FLASH FLOOD WATCH ALL HAWAIIAN ISLANDS THROUGH 4 AM MONDAY MORNING. && M BALLARD
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HONOLULU HI
139 PM HST SUN APR 02 2006
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0115 PM LIGHTNING HAUULA 21.59N 157.92W
04/02/2006 HONOLULU HI EMERGENCY MNGR
LIGHTNING HIT 2 POLES ON KAWAIPUNA STREET. ELECTRICITY IS
OUT IN HAUULA AND THERE ARE LINES ON THE ROADWAY.
&&
HFOPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HONOLULU HI
338 PM HST SUN APR 02 2006
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0337 PM FLASH FLOOD WAIKANE 21.50N 157.88W
04/02/2006 HONOLULU HI EMERGENCY MNGR
WAIKANE STREAM OVERFLOWING.
&&
HFOThe national radar mosaic for the moment the first event began.
1 flash flood. Local standard time, as filed.
The Hanalei Bridge, part of Kuhio Highway in northern Kauai, was closed for a couple of hours as the Hanalei River overflowed its banks. Heavy rain and isolated thunderstorms were impacting the local area, and generated flash flooding conditions. No serious injuries or property damage were reported, however.
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: 5496454.