Heavy Rain, Honolulu
- When
- June 12, 12:50 AM HST to 7:25 AM HST
- Where
- Honolulu County, 1.04 mi NW of Kahuku to 0.95 mi SSE of Kaaawa
- Reported by
- Official NWS Observations
- Coordinates
- 21.692, -157.960
Heavy Rain in Hawaii, June 12, 2008
Heavy showers embedded within Molokai plume cloudiness produced small stream and drainage ditch flooding, and ponding on roadways, in windward portions of Oahu, from Turtle Bay to Kaaawa. There were no reports of serious property damage or injuries.
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
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 embedded within Molokai plume cloudiness produced small stream and drainage ditch flooding, and ponding on roadways, in windward portions of Oahu, from Turtle Bay to Kaaawa. There were no reports of serious property damage or 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 Jun 11, 8:30 PM HST, 4 hours 20 minutes earlier.
Area forecast discussion, Jun 11, 8:30 PM HST, 4 hours 20 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE HONOLULU HI 830 PM HST WED JUN 11 2008 .SYNOPSIS... HIGH PRESSURE FAR TO THE NORTHEAST WILL MAINTAIN LIGHT TRADE WINDS THROUGH THE WEEKEND AND INTO NEXT WEEK. MOST SHOWERS WILL REMAIN WINDWARD...THOUGH ISOLATED HEAVIER SHOWERS MAY OCCUR LEEWARD IN THE AFTERNOON. && .DISCUSSION... A COMPLEX PATTERN STILL PREVAILED ALOFT OVER THE MAIN HAWAIIAN ISLANDS. ALTHOUGH A STRONG RIDGE EXTENDED WELL TO THE NORTH... SIGNIFICANT TROUGHING PERSISTED WITHIN AND ERODED THE BASE OF THE RIDGE CLOSER TO THE ISLANDS...A BIT LIKE A CAVE WITHIN A HILL. THUS...THOUGH SUBSIDENCE OVER THE SUBTROPICAL RIDGE AT THE SURFACE TO THE NORTHEAST REMAINED SUFFICIENT TO KEEP THE LOWER FEATURE FROM DISSIPATING...ENOUGH UPLIFT OCCURRED RIGHT NEAR THE ISLANDS TO INTENSIFY SOME TRADE-WIND SHOWERS. OVER THE NEXT 48 TO 72 HOURS...GUIDANCE PREDICTS THE MID-LEVEL TROUGHING TO DEEPEN AND EXPAND OUT TO THE NORTHWEST OVER THE ISLANDS...UNDERCUTTING AND EFFECTIVELY DESTROYING THE SURROUNDING RIDGE. LESS SUBSIDENCE WILL PERMIT THE SUBTROPICAL RIDGE TO WEAKEN...AND THUS THE TRADE WINDS TO DIMINISH FURTHER WITH TIME AS WELL. HOWEVER...RECENT MODEL RUNS HAVE AVOIDED DISSIPATING THE SURFACE RIDGE COMPLETELY...AND THUS THE TRADES WILL PERSIST AS WELL...IF IN A GREATLY WEAKENED STATE. ONCE THE TRADES DIMINISH TO THIS LEVEL...SEA AND LAND BREEZES WILL BECOME LOCALLY SIGNIFICANT. CLOUD COVER AND PRECIPITATION WILL CHANGE IN CHARACTER ALONG WITH THE PREVAILING WINDS...THOUGH CORRESPONDINGLY LESS THAN EXPECTED EARLIER IN THE WEEK. TRADE-WIND SHOWERS STILL WILL PERSIST THROUGH THE FORECAST PERIOD...BUT THE HEAVIEST SHOWERS MAY SHIFT INCREASINGLY TO DIURNAL CUMULUS BUILDUPS INLAND AND LEEWARD. SINCE THE WINDWARD SHOWERS WILL BE MORE WIDESPREAD THAN THE LEEWARD ONES...THE CHANCE OF RAIN WILL REMAIN HIGHER THERE HOWEVER. && .MARINE... SURF ALONG SOUTH-FACING SHORES WILL RISE FRIDAY...POSSIBLY REACHING THE 8-FOOT THRESHOLD FOR A HIGH SURF ADVISORY. ANOTHER LARGER SOUTH SWELL IS EXPECTED LATE ON SATURDAY. && .HFO WATCHES/WARNINGS/ADVISORIES... NONE. && RYSHKO
The radar
The national radar mosaic for the moment the first event began.
Event by event
1 heavy rain. Local standard time, as filed.
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
- Tornadoes and Flash Flooding in Wisconsin, June 12 to 13, 2008
- Flash Flooding and Hail in Wisconsin, June 12, 2008
- Tornadoes and Hail in Minnesota, June 12, 2008
- Tornadoes and Flash Flooding in Kansas, June 12 to 13, 2008
- Flash Flooding and Hail in Michigan, June 12 to 13, 2008
- Flash Flooding and Flood in Wisconsin, June 12 to 13, 2008
- Tornado and Flash Flooding in Iowa, June 12 to 13, 2008
- Tornado and Hail in Illinois, June 12 to 13, 2008
- Tornado and Flash Flooding in Michigan, June 12 to 17, 2008
- Tornado and Flash Flooding in Illinois, June 12 to 13, 2008
- Flood in Minnesota, June 12 to 13, 2008
- Flash Flooding in Iowa, June 12 to 13, 2008
More
Every storm in Hawaii in 2008Every state in 2008This day in weather historyWarnings in Hawaii, June 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: 100042.