Heavy Rain in Hawaii, July 12, 2005

Name: Heavy Rain in Hawaii, July 12, 2005
Start: 2005-07-12T08:04
End: 2005-07-12T10:13
Location: Hawaii

July 12, 2005 · NWS HFO · 1 event in 1 county or zone

Heavy showers produced ponding of roadways, and small stream and drainage ditch flooding in windward sections of Oahu. No serious injuries or property damage were reported.

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.

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Tropical storms and surge
Floods
Wind
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Winter weather
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Marine and coastal
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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 of roadways, and small stream and drainage ditch flooding in windward sections of Oahu. 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 Jul 12, 4:00 AM HST, 4 hours 4 minutes earlier.

Area forecast discussion, Jul 12, 4:00 AM HST, 4 hours 4 minutes before

HAWAIIAN ISLANDS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HONOLULU HI
400 AM HST TUE JUL 12 2005

.SYNOPSIS...
SHOWER CLOUDS LINED UP ALONG WINDWARD COASTS OF ALL ISLANDS WILL
MAKE FOR A RATHER DAMP MORNING ALONG THESE COASTS. ISOLATED SHOWERS
MAY MAKE IT TO LEEWARD SECTIONS BRIEFLY. HIGH PRESSURE NORTH OF THE
ISLANDS WILL KEEP TRADE WINDS BLOWING FOR THE FORESEEABLE FUTURE.
DISTURBANCES IN THE UPPER ATMOSPHERE MAY ENHANCE INCOMING MOISTURE
ON THIS TRADE WIND FLOW AT TIMES FOR SOME MODERATELY HEAVY TRADE
SHOWERS. OCCASIONAL HEAVIER AFTERNOON SHOWERS MAY OCCUR IN KONA.

&&

.DISCUSSION...
PLENTY OF SHOWER CLOUDS SEEN UPWIND OF THE MAIN HAWAIIAN ISLANDS MY
BE PRODDED ON BY AN UPPER AIR DISTURBANCE NORTHWEST OF KAUAI OVER
THE NEXT SEVERAL DAYS TO PRODUCE SOME HEAVIER THAN USUAL TRADE
SHOWERS OVER WINDWARD AND MAUKA SECTIONS. A FEW OF THESE MAY ALSO
BLOW OVER TO SECTIONS LEEWARD OF THE MOUNTAINS ON THE SMALLER
ISLANDS. KONA DISTRICTS ON THE BIG ISLAND MAY ALSO SEE SOME RATHER
HEAVY AFTERNOON CONVECTIVE SHOWERS DUE TO THE UPPER AIR DISTURBANCE.

CONTINUED RIDGING ACROSS THE CENTRAL PACIFIC NORTH OF THE ISLANDS
WILL KEEP OUR TRADE WINDS IN THE FORECAST THROUGH THE PERIOD IN THE
MODERATE TO OCCASIONALLY FRESH RANGE...WITH LIGHTER WINDS OVER THE
ISLANDS AT NIGHT. WITH PLENTY OF SHOWER-BEARING CLOUDS OVER THE
WATERS FAR UPWIND OF THE ISLANDS AND THE CONTINUING RATHER
UNCERTAIN STABILITY CREATED BY A MID-LEVEL LOW ALOFT JUST NORTHWEST
OF KAUAI...EXPECT TRADE WIND SHOWERS TO PREDOMINATE AT TIMES OVER
WINDWARD AND MAUKA SECTIONS THROUGH THE WEEK...WITH SOME HEAVIER
AFTERNOON CONVECTION POSSIBLE ON THE LEEWARD SLOPES OF THE BIG
ISLAND OF HAWAII AS WELL. THE WEATHER MAY DRY OUT JUST A BIT BY
SUNDAY AS SOME RIDGING IS FORECAST ALOFT BY THE GFS FOR EARLY NEXT
WEEK.

&&

.HFO WATCHES/WARNINGS/ADVISORIES...
NONE.

&&

FARRELL

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, Honolulu

When: July 12, 8:04 AM HST to 10:13 AM HST
Where: Honolulu County, Hauula
Reported by: OFFICIAL NWS OBS.
Coordinates: 21.455, -157.961 (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

Every storm in Hawaii in 2005 Every state in 2005 This day in weather history Warnings in Hawaii, July 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 2026-09-30. Each event’s entry at NCEI: 5465186.