Heavy Rain in Hawaii, June 14 to 15, 2015

Name: Heavy Rain in Hawaii, June 14 to 15, 2015
Start: 2015-06-14T14:56
End: 2015-06-15T16:44
Location: Hawaii

June 14 to 15, 2015 · NWS HFO · 3 events in 2 counties and zones

With a weak trade flow and daytime heating, heavy rain drenched leeward areas of Oahu and portions of West Maui. The showers caused small stream and drainage ditch flooding, and ponding on roadways.

Where it happened

Every event with a place to put it. 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

Open the live radar over this ground

The toll

Deaths: 0
Injuries: 0
Property damage: None recorded
Crop damage: None recorded
Events: 3

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.

With a weak trade flow and daytime heating, heavy rain drenched leeward areas of Oahu and portions of West Maui. The showers caused small stream and drainage ditch flooding, and ponding on roadways. No significant property damage or injuries 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 Jun 14, 2:00 PM HST, 56 minutes earlier.

Area forecast discussion, Jun 14, 2:00 PM HST, 56 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HONOLULU HI
200 PM HST SUN JUN 14 2015

.UPDATE...
WINDS HAVE STRENGTHENED AGAIN ON THE SUMMITS OF MAUNA KEA AND MAUNA
LOA SO WE HAVE ISSUED A WIND ADVISORY THROUGH EARLY TUESDAY MORNING.

&&

.SYNOPSIS...
A SURFACE TROUGH NORTH OF THE AREA WILL KEEP TRADE WINDS LIGHTER
THAN NORMAL TODAY. THE TRADES WILL BE LIGHT ENOUGH TO ALLOW DAYTIME
HEATING TO PRODUCE SHOWERS OVER INTERIOR AND LEEWARD AREAS THIS
AFTERNOON. A RIDGE BUILDING NORTH OF THE ISLANDS WILL BRING STRONGER
TRADE WINDS STARTING TONIGHT...AND CONTINUING THROUGH THE REST OF
THE WEEK. THE STRONGER TRADE WINDS WILL KEEP SHOWERS FOCUSED OVER
WINDWARD AREAS EXCEPT FOR AFTERNOON SHOWERS OVER THE KONA SLOPES.

&&

.DISCUSSION...
THE SUBTROPICAL RIDGE NORTH OF THE AREA IS BEING WEAKENED BY A
SURFACE TROUGH BETWEEN THE RIDGE AND THE MAIN HAWAIIAN ISLANDS.
WINDS OVER THE ISLANDS ARE LIKELY TO REMAIN LIGHTER THAN NORMAL
TODAY AS THIS TROUGH MOVES OFF TO THE NORTHWEST. A TROUGH ALOFT IS
HELPING DE-STABILIZE THE ATMOSPHERE A BIT. THE LIGHT WINDS AND
TROUGH ALOFT WILL COMBINE TO BRING AFTERNOON AND EVENING SHOWERS
TODAY WHILE THE TRADE-WIND FLOW WILL CONTINUE TO PRODUCE MAINLY
NIGHT AND MORNING SHOWERS OVER WINDWARD AREAS. THE TROUGH ALOFT HAS
ALSO BEEN PRODUCING STRONG SOUTHWEST WINDS ON THE SUMMITS OF MAUNA
KEA AND MAUNA LOA. A WIND ADVISORY IS NOW IN EFFECT THROUGH EARLY
TUESDAY MORNING.

BY TOMORROW AFTERNOON...AN EAST NORTHEAST TO WEST SOUTHWEST SURFACE
RIDGE WILL BUILD ABOUT 600 MILES NORTH OF THE AREA. THE RIDGE WILL
PRODUCE STRONGER TRADE WINDS OVER THE ISLANDS. MEANWHILE THE TROUGH
ALOFT WILL MOVE OFF TO THE NORTHEAST. THE STRONGER TRADE WINDS AND
MORE STABLE ATMOSPHERE WILL BRING AN END TO THE AFTERNOON SHOWERS
OVER THE SMALLER ISLANDS...ALTHOUGH AFTERNOON SHOWERS WILL CONTINUE
OVER THE LEE SLOPES OF THE BIG ISLAND. TYPICAL SUMMER-LIKE
TRADE-WIND WEATHER WILL PREVAIL THROUGH NEXT WEEKEND.

&&

.AVIATION...
NO AIRMETS ARE EXPECTED FOR THE NEXT 24 HOURS. VFR CONDITIONS WILL
PREVAIL...BUT ISOLATED MVFR CEILINGS AND VSBY ARE POSSIBLE. MVFR
CONDITIONS ARE MOST LIKELY OVER LEEWARD AREAS THIS AFTERNOON
AND EVENING...AND OVER WINDWARD AREAS TONIGHT THROUGH TOMORROW
MORNING.

&&

.MARINE...
WINDS AND SEAS ARE EXPECTED TO REMAIN BELOW THE SMALL CRAFT
ADVISORY...SCA...THRESHOLDS THROUGH THE DAY TOMORROW. THE RIDGE
BUILDING NORTH OF THE AREA WILL LIKELY PRODUCE STRONG ENOUGH WINDS
OVER THE WINDY AREAS AROUND THE BIG ISLAND AND MAUI TO REQUIRE A SCA
BY WEDNESDAY MORNING OR POSSIBLY TOMORROW NIGHT. NO SIGNIFICANT
SWELLS ARE EXPECTED FOR THE NEXT FEW DAYS. A SOUTH SWELL ARRIVING
FRIDAY MAY PRODUCE ADVISORY-LEVEL SURF OVER THE WEEKEND.

&&

.HFO WATCHES/WARNINGS/ADVISORIES...
WIND ADVISORY THROUGH 600 AM TUESDAY FOR THE SUMMITS OF MAUNA KEA
AND MAUNA LOA.

&&

DONALDSON

The radar

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

Open the radar archive at this moment

Event by event

3 heavy rain. Local standard time, as filed.

Heavy Rain, Honolulu

When: June 14, 2:56 PM HST to 5:24 PM HST
Where: Honolulu County, 0.54 mi S of Waianae to 0.81 mi N of Barbers Pt Housing
Reported by: Official NWS Observations
Coordinates: 21.442, -158.180

Heavy Rain, Maui

When: June 14, 9:03 PM HST to June 15, 1:44 AM HST
Where: Maui County, 2.3 mi SE of Napili to 0.62 mi WSW of Wailuku Heights
Reported by: Official NWS Observations
Coordinates: 20.959, -156.642

Heavy Rain, Honolulu

When: June 15, 2:58 PM HST to 4:44 PM HST
Where: Honolulu County, 0.61 mi NE of Makaha Valley to 0.59 mi N of Barbers Pt Housing
Reported by: Official NWS Observations
Coordinates: 21.486, -158.194

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 2015 Every state in 2015 This day in weather history Warnings in Hawaii, June 2015

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: 578490, 578492, 578493.