Name: Heavy Rain in Hawaii, September 15, 2005
Start: 2005-09-15T00:35
End: 2005-09-15T03:27
Location: Hawaii

Where it happened

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.

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: 1

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.

Heavy showers produced ponding on roadways, and small stream and drainage ditch flooding in coastal and upslope sections of eastern and windward East Maui. No serious injuries or property damage were reported.

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 Sep 14, 8:30 PM HST, 4 hours 5 minutes earlier.

Area forecast discussion, Sep 14, 8:30 PM HST, 4 hours 5 minutes before

HAWAIIAN ISLANDS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HONOLULU HI
830 PM HST WED SEP 14 2005

.SYNOPSIS...TROUGHING ALOFT AND ABUNDANT LOW LEVEL MOISTURE WILL
KEEP THE POSSIBILITY OF HEAVY TRADE WIND SHOWERS ALIVE THROUGH
THURSDAY. DRIER AND MORE STABLE WEATHER IS EXPECTED FRIDAY AND
THEREAFTER. SURF ALONG SOUTHERN SHORES WILL REMAIN ELEVATED THROUGH
FRIDAY.

&&

.DISCUSSION...THE FEATURE AFFECTING HAWAIIAN WEATHER THE MOST THIS
EVENING IS AN UPPER TROUGH WITH AN AXIS 300 TO 400 MILES WEST OF THE
MAIN HAWAIIAN ISLANDS. WE ARE IN THE UNSTABLE UPLIFT PORTION OF THIS
TROUGH...WITH SOUTHWEST WINDS NOTED IN SOUNDINGS ABOVE ABOUT 10000
FEET. A SHORT WAVE TRAVELING THROUGH THE BASE OF THE LONG WAVE
TROUGH IS CURRENTLY TRIGGERING HEAVY SHOWERS OVER KAUAI AND AREAS OF
WINDWARD OAHU. HEAVY SHOWERS AND POSSIBLY THUNDERSTORMS MAY OCCUR
ACROSS THESE ISLANDS TONIGHT BEFORE THE SHORT WAVE MOVES AWAY.

THE 00Z GFS75 SHOWS THE UPPER TROUGH WILL REMAIN OVER THE REGION
THROUGH THURSDAY...ENHANCING TRADE WIND SHOWERS OVER MAINLY WINDWARD
AND MAUKA AREAS. LEEWARD SLOPES OF THE BIG ISLAND MAY SEE SOME
ENHANCEMENT AS WELL IN THE AFTERNOON AND EVENING. ON FRIDAY THE
UPPER TROUGH WILL DRIFT TO THE NORTHWEST AND WEAK RIDGING WILL BUILD
OVER THE STATE FROM THE EAST. THIS WILL BRING A SLIGHT INCREASE IN
STABILITY AND REDUCE THE THREAT OF HEAVY SHOWERS FOR THE REMAINDER
OF THE FORECAST PERIOD. MODERATE TO LOCALLY FRESH TRADE WINDS WILL
PERSIST THROUGH THE WEEKEND AS HIGH PRESSURE PERSISTS NORTH OF THE
STATE. TRADES MAY DECREASE SLIGHTLY EARLY NEXT WEEK AS THE HIGH
MOVES OFF TO THE NORTHEAST.

TROPICAL STORM JOVA...UPGRADED FROM TROPICAL DEPRESSION TEN E...IS
LOCATED ABOUT 1750 MILES EAST SOUTHEAST OF HILO. THE OFFICIAL
FORECAST...ISSUED BY THE NATIONAL HURRICANE CENTER IN MIAMI...HAS
JOVA STRENGTHENING INTO A MINIMAL HURRICANE AND REACHING A POINT 600
MILES EAST SOUTHEAST OF HILO SATURDAY AFTERNOON. GIVEN THE
UNCERTAINTY INVOLVED IN TRACK FORECASTING AT DAY FIVE...WE WILL HOLD
OFF MAKING ANY CHANGES IN THE LOCAL FORECAST AT THIS TIME AND WILL
MAINTAIN A TRADE WIND FORECAST. THIS SYSTEM WILL BE CLOSELY
MONITORED AS IT APPROACHES THE REGION. THE CENTRAL PACIFIC HURRICANE
CENTER WILL ASSUME FORECAST RESPONSIBILITY FOR JOVA WHEN IT CROSSES
140W ON SATURDAY.

&&

.MARINE...SURF ALONG SOUTH FACING SHORES WILL REMAIN ELEVATED AT THE
15 FOOT WARNING LEVEL INTO THURSDAY. CIVIL DEFENSE REPORTED MINOR
INCIDENTS OF SURF WASHING ONTO ROADS NEAR LAWAI BEACH ON KAUAI AND
IN NANAKULI ON OAHU...AS WELL AS WATER SPLASHING OVER THE SEA WALL
AT ALII DRIVE IN KAILUA KONA. SURF IS EXPECTED TO SUBSIDE BELOW THE
WARNING LEVEL ON THURSDAY...YET REMAIN ABOVE THE ADVISORY LEVEL OF
8 FEET INTO EARLY SATURDAY.

&&

.HFO WATCHES/WARNINGS/ADVISORIES...
SMALL CRAFT ADVISORY...LARGE OPEN OCEAN SWELLS
SMALL CRAFT ADVISORY...WINDS IN MAALAEA BAY
HIGH SURF WARNING...SOUTH FACING SHORES
FLOOD WATCH...OAHU AND MOLOKAI

&&

POWELL

The radar

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

Open the radar archive at this moment

Event by event

1 heavy rain. Local standard time, as filed.

Heavy Rain, Maui

When: September 15, 12:35 AM HST to 3:27 AM HST
Where: Maui County, Paia
Reported by: OFFICIAL NWS OBS.
Coordinates: 20.868, -156.617 (the zone’s center; the record gives no point)

What these are

Heavy Rain: Rainfall totals unusual for the place and season that did not produce a flood.

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

The same day elsewhere

More

Every storm in Hawaii in 2005 Every state in 2005 This day in weather history Warnings in Hawaii, September 2005

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: 5475577.