Hawaii, 2008

Flash Flooding and Heavy Rain in Hawaii, February 1 to 4, 2008

February 1 to 4, 2008 · NWS HFO · 9 events in 5 counties and zones

An upper trough over the Hawaiian Islands enhanced trade wind showers, which resulted in wintry conditions in the higher elevations, and heavy rain, thunderstorms, and flash flooding over much of the state at lower elevations. More than 200 homes, most of them on the Big Island of Hawaii and in Kauai, were damaged by the high water.

Where it happened

Every event with a place to put it; 2 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.

  • Tornadoes
  • Tropical storms and surge
  • Floods
  • Wind
  • Hail
  • Winter weather
  • Heat and drought
  • Cold
  • Fire, smoke and dust
  • Marine and coastal
  • Other

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The toll

Deaths
0
Injuries
0
Property damage
None recorded
Crop damage
None recorded
Events
9

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.

What happened

The episode as NWS HFO wrote it up.

An upper trough over the Hawaiian Islands enhanced trade wind showers, which resulted in wintry conditions in the higher elevations, and heavy rain, thunderstorms, and flash flooding over much of the state at lower elevations. More than 200 homes, most of them on the Big Island of Hawaii and in Kauai, were damaged by the high water. Because of high water and landslides, the flooding closed many roadways from time to time. At least two cars and a 40-foot shipping container were swept into a stream and river in Kauai on the 3rd of February, with the container hitting two bridges as it moved down the Hanapepe River to the ocean. No dollar cost estimate on damages was available. There were no serious injuries.

What forecasters said that day

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 Jan 31, 8:30 PM HST, 3 hours 30 minutes earlier.

Area forecast discussion, Jan 31, 8:30 PM HST, 3 hours 30 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HONOLULU HI
830 PM HST THU JAN 31 2008

.SYNOPSIS...
HIGH PRESSURE NORTH OF THE ISLANDS WILL STRENGTHEN...CAUSING THE
TRADE WINDS TO INCREASE FRIDAY AND SATURDAY. AN UPPER LEVEL TROUGH
OVER THE ISLANDS WILL WEAKEN...BUT WILL KEEP THE ATMOSPHERE UNSTABLE
OVER THE EASTERN HALF OF THE STATE THROUGH THE NIGHT. LOCALLY HEAVY
SHOWERS AND ISOLATED THUNDERSTORMS ARE POSSIBLE OVER THE BIG ISLAND
AND MAUI THIS EVENING.

&&

.DISCUSSION...
WATER VAPOR IMAGERY SHOWS THE CORE OF THE UPPER LOW MOVING AWAY TO
THE NORTHEAST OF THE BIG ISLAND...WITH A TROUGH LINGERING BACK
ACROSS THE STATE. 00Z PHLI/PHTO SOUNDINGS SHOW AN ADDITIONAL 2-4C OF
MID-LEVEL WARMING OVER THE PAST 24 HOURS...WITH A WEAK INVERSION AT
PHLI BUT PHTO STILL INVERSION FREE. PRECIPITABLE WATER AT PHTO HAS
RISEN TO 1.4 INCHES...WITH A NEARLY SATURATED COLUMN BELOW 550MB.
04Z POES AMSU TOTAL PRECIPITABLE WATER PASS SHOWS A NARROW RIBBON OF
HIGHER PRECIPITABLE WATER NEAR WINDWARD MAUI/BIG ISLAND.

THE COMBINATION OF GREATER MOISTURE AND LINGERING INSTABILITY
CONTINUE TO SUPPORT HEAVY RAINFALL POTENTIAL ACROSS THE EASTERN END
OF THE STATE. DEEP CONVECTION HAS DIMINISHED OVER THE COASTAL
WATERS...WITH ANY LINGERING THUNDERSTORMS FAR OUT OVER THE NORTHEAST
OFFSHORE WATERS NEAR THE CORE OF THE UPPER LOW. A WINTER WEATHER
ADVISORY IS IN EFFECT THROUGH TONIGHT FOR THE BIG ISLAND SUMMITS.
LATE AFTERNOON WEB CAMS ON MAUNA KEA SHOW CLOUDS AT SUMMIT
LEVEL...WHICH IS ALSO SUPPORTED BY THE MOISTURE DEPTH ON THE PHTO
SOUNDING. CONVECTION ALONG THE SLOPES HAS DIMINISHED...WITH THE
CURRENT WARM-TOPPED RAIN SHOWERS MAINLY AFFECTING THE WINDWARD
COAST. WITH THE SLOWLY STABILIZING ATMOSPHERE...THE SHOWERS MAY HAVE
A DIFFICULT TIME MAKING IT TO SUMMIT LEVELS TONIGHT...AS WAS THE
CASE LAST NIGHT. HOWEVER...GIVEN THE CLOUDS AND THE SATURATED
PROFILE THROUGH 550MB...ICING MAY BE MORE OF AN ISSUE TONIGHT
INSTEAD OF SNOW. MOISTURE ONLY EXTENDS THROUGH ABOUT -9C...LIMITING
ICE NUCLEATION OUTSIDE OF DEEPER CONVECTIVE SHOWERS. WILL UPDATE THE
WINTER WEATHER ADVISORY STATEMENT TO HIGHLIGHT THE POTENTIAL FOR
ICING AS WELL AS SNOW.

00Z NAM/GFS SHOW THE SURFACE HIGH BUILDING NORTH OF THE STATE
THROUGH SATURDAY...WITH PRESSURES ALREADY BEGINNING TO RISE ACROSS
THE ISLANDS. TRADES DROPPED OFF A BIT TODAY...BUT WILL PICK UP AGAIN
AS THE GRADIENT TIGHTENS AND REMAIN BREEZY AND GUSTY INTO THE
WEEKEND. THE UPPER TROUGH WILL LINGER OVER THE STATE. FORECAST
SOUNDINGS SHOW THE TEMPERATURE PROFILE STABILIZING SOME...BUT
SATURATING AND REMAINING INVERSION FREE THROUGH THE FORECAST PERIOD.
THE GREATER MOISTURE DEPTH WITH THE LACK OF AN INVERSION WILL HELP
TO MAINTAIN THE CURRENT WET TRADE PATTERN. SHOWERS WILL FAVOR
WINDWARD AND MAUKA AREAS...BUT WILL BE MORE WIDESPREAD AND HEAVIER
THAN TYPICAL TRADE WIND SHOWERS. THE STRONG WINDS WILL ALSO BLOW
SHOWERS ACROSS WINDWARD SECTIONS OF THE SMALLER ISLANDS MORE
FREQUENTLY.

THE 12Z/31 ECMWF BACKED AWAY FROM ITS EARLIER SOLUTION FEATURING A
STRONGER INVERTED TROUGH DEVELOPING WEST OF THE STATE...BUT NOW
HINTS AT A SHEAR LINE ASSOCIATED WITH A STRONGER MID-LATITUDE SYSTEM
BRUSHING THE STATE BY THE END OF THE FORECAST PERIOD. THE 18Z GFS
STILL SHOWS THE INVERTED TROUGH DEVELOPING OVER THE STATE...BUT HAS
TRENDED FARTHER WEST TOWARD THE ENSEMBLE MEAN. THE CURRENT FORECAST
LOOKS REASONABLE WITH WINDS SLOWLY VEERING TO THE EAST/SOUTHEAST
EARLY NEXT WEEK...WITH CONTINUED HIGHER THAN NORMAL RAINFALL CHANCES.

&&

.MARINE...
COMBINED SEAS AT THE KAILUA BAY BUOY HAVE RISEN TO 9FT/8-9SEC THIS
EVENING. THE 00Z WAVEWATCH III GUIDANCE IS ACTUALLY PRETTY CLOSE TO
THE BUOY READINGS...AFTER RUNNING A FOOT OR SO TOO HIGH OVER THE
PAST COUPLE RUNS. WINDS AND THE EASTERLY TRADE WIND SWELL WILL
INCREASE AS THE HIGH STRENGTHENS NORTH OF THE STATE...AND WE WILL
LIKELY NEED ANOTHER HIGH SURF ADVISORY FOR EAST FACING SHORES THIS
WEEKEND.

&&

.HFO WATCHES/WARNINGS/ADVISORIES...
WINTER WEATHER ADVISORY UNTIL 6 AM HST FRIDAY FOR BIG ISLAND SUMMITS.

SMALL CRAFT ADVISORY UNTIL 6 PM HST FRIDAY FOR ALL HAWAIIAN WATERS.

&&

BRAVENDER

The radar

The national radar mosaic for the moment the first event began.

Open the radar archive at this moment

Event by event

4 heavy rain, 3 flash flood, 2 winter weather. Local standard time, as filed.

Winter Weather, Big Island Summit

When
February 1, 12:00 AM HST to February 4, 2:00 PM HST
Where
Big Island Summit forecast zone
Reported by
Newspaper
Coordinates
19.602, -155.523 (the zone’s center; the record gives no point)

Icy conditions and gusty winds at the summits of Mauna Kea and Mauna Loa caused travel problems for those heading to the highest elevations on the Big Island of Hawaii.

Winter Weather, Haleakala Summit

When
February 1, 12:00 AM HST to February 4, 2:00 PM HST
Where
Haleakala Summit forecast zone
Reported by
Newspaper
Coordinates
21.027, -156.788 (the zone’s center; the record gives no point)

Icy conditions and gusty winds at the summit of Haleakala caused travel problems for those heading to the highest elevations on the Valley Isle of Maui.

Heavy Rain, Hawaii

When
February 1, 6:34 PM HST to 9:27 PM HST
Where
Hawaii County, 1.54 mi S of Hakalau to 2.52 mi S of Volcano
Reported by
Official NWS Observations
Coordinates
19.878, -155.132

Flash Flood, Hawaii

When
February 2, 2:00 AM HST to February 3, 1:20 AM HST
Where
Hawaii County, 2.75 mi N of Laupahoehoe to 2.07 mi S of Paauilo
Cause
Heavy Rain
Reported by
County Official
Coordinates
20.020, -155.231

Road closures caused by flash flooding in the Hilo area of the Big Island of Hawaii included Kamehameha Avenue from Manono to Ponahawai, Pauahi Street from Kamehameha to Aupuni, East Kawailani from Awapuhi to Ahuna, and Akolea Road. Also, Highway 11 in the Kawa Flats area of the Kau District was closed because of flooding.

Heavy Rain, Maui

When
February 2, 6:38 AM HST to 4:02 PM HST
Where
Maui County, 1.44 mi NNE of Koali to 2.91 mi SSE of Kanaha Bp
Reported by
Official NWS Observations
Coordinates
20.700, -156.022

Heavy Rain, Hawaii

When
February 3, 10:19 AM HST to 4:00 PM HST
Where
Hawaii County, 0.59 mi WSW of Hakalau to 3.3 mi SW of Naalehu
Reported by
Official NWS Observations
Coordinates
19.896, -155.138

Flash Flood, Kauai

When
February 3, 11:05 AM HST to 12:32 PM HST
Where
Kauai County, 2.94 mi WNW of Hanalei to 2.87 mi WNW of Hanalei
Cause
Heavy Rain
Reported by
Law Enforcement
Coordinates
22.213, -159.543

Flooding closed the Wainiha Bridge in the northern part of Kauai.

Flash Flood, Kauai

When
February 3, 2:41 PM HST to 11:27 PM HST
Where
Kauai County, 0.61 mi SSE of Princeville to 0.7 mi SSE of Princeville
Cause
Heavy Rain
Reported by
Law Enforcement
Coordinates
22.212, -159.476

Portion of Kuhio Highway closed because of flooding at the Hanalei Bridge in the northern section of Kauai.

Heavy Rain, Hawaii

When
February 3, 4:30 PM HST to February 4, 1:15 AM HST
Where
Hawaii County, 1.48 mi SSE of Papaikou to 2.51 mi SW of Naalehu
Reported by
Official NWS Observations
Coordinates
19.762, -155.089

What these are

Winter Weather
Snow, sleet or freezing rain below warning levels that still caused disruption, damage or casualties.
Heavy Rain
Rainfall totals unusual for the place and season that did not produce a flood.
Flash Flood
Flooding that begins within six hours of the rain that causes it, or of a dam or levee failure or ice jam release, often with deadly speed.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

More

Every storm in Hawaii in 2008Every state in 2008This day in weather historyWarnings in Hawaii, February 2008

Sources

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: 76441, 76443, 76448, 76450, 76647, 76649, 76648, 76650, 76651.