Flash Flood, Honolulu
- When
- February 12, 12:15 PM HST to 2:15 PM HST
- Where
- Honolulu County, Waikane
- Reported by
- LAW ENFORCEMENT
- Coordinates
- 21.500, -157.883
Flash Flood in Hawaii, February 12, 2005
Heavy showers generated flash flooding conditions over windward sections of Oahu, between Waikane and Kahaluu. Deep ponding across Kamehameha Highway in Waiahole made the roadway impassable for a time and forced police officers to close it until the waters subsided.
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 generated flash flooding conditions over windward sections of Oahu, between Waikane and Kahaluu. Deep ponding across Kamehameha Highway in Waiahole made the roadway impassable for a time and forced police officers to close it until the waters subsided. However, 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 Feb 12, 10:00 AM HST, 2 hours 15 minutes earlier.
Area forecast discussion, Feb 12, 10:00 AM HST, 2 hours 15 minutes before
HAWAIIAN ISLANDS FORECAST DISCUSSION NATIONAL WEATHER SERVICE HONOLULU HI 1000 AM HST SAT FEB 12 2005 .SYNOPSIS... A SHEAR LINE OVER THE BIG ISLAND IS MOVING SLOWLY TOWARD THE SOUTHEAST...BUT CLOUDS AND SHOWERS ASSOCIATED WITH THIS WEATHER FEATURE WILL LIKELY LINGER OVER THE ISLANDS THROUGHOUT THE DAY. HIGH PRESSURE BUILDING IN NORTH OF THE STATE WILL GIVE THE ISLANDS TYPICAL TRADE WIND WEATHER FOR THE COMING WEEK. SHOWERS IF ANY WILL MOST LIKELY BE CONFINED TO WINDWARD AND MAUKA AREAS. && .DISCUSSION... ZONES HAVE BEEN UPDATED TO LOWER WINDS ACROSS MOST OF THE AREA AS WELL AS REMOVE MENTION OF HEAVY SHOWERS OVER WINDWARD AND MAUKA LOCATIONS ON MAUI AND THE BIG ISLAND. A SHEAR LINE IS DISSIPATING IN THE VICINITY OF THE BIG ISLAND BUT CLOUDS AND SHOWERS LINGER ACROSS MUCH OF THE STATE. THE MOST LIKELY PLACES FOR SHOWERS TO OCCUR WILL BE OVER WINDWARD AND MAUKA SECTIONS. MOISTURE ASSOCIATED WITH THE SHEAR LINE WILL LIKELY KEEP SCATTERED SHOWERS AROUND THROUGH TONIGHT WITH LESS ACTIVITY EXPECTED ON SUNDAY. A BAND OF HIGHER CLOUDS ASSOCIATED WITH AN UPPER LEVEL TROUGH CONTINUE MOVING OVER MOST OF THE STATE BUT THE BACK EDGE IS NOW OVER THE ISLAND OF KAUAI. VERY LIGHT SHOWERS MAY FALL FROM THESE CLOUDS BUT THEY SHOULD BE RATHER ISOLATED AND BRIEF. LEEWARD SECTIONS OF KAUAI AND POSSIBILITY OAHU MAY SEE SOME SUNSHINE THIS AFTERNOON AS THE HIGH CLOUDS CONTINUE MOVING EASTWARD. THE HIGH CLOUDS SHOULD BE MOSTLY GONE BY TOMORROW SO MORE SUNSHINE IS EXPECTED OVER MANY AREAS BY THEN ESPECIALLY LEEWARD LOCATIONS. SOMETHING THAT WE HAVE NOT SEEN IN A WHILE IS A WEEKS WORTH OF TRADE WIND WEATHER. BY TOMORROW AN AREA OF HIGH PRESSURE WILL RESIDE NORTH OF THE STATE GIVING US LIGHT TO MODERATE TRADE WINDS ACROSS THE AREA. THE ONLY EXCEPTIONS WILL BE THE USUAL PLACES THAT SEE LOCAL LAND AND SEA BREEZE CONDITIONS MAINLY OVER PORTIONS OF THE BIG ISLAND. SHOWER ACTIVITY WILL BE RATHER LIMITED WITH MOST OF THEM OCCURRING OVER WINDWARD AND MAUKA AREAS. ANY SHOWERS THAT DO OCCUR ARE EXPECTED TO BE LIGHT AND BRIEF. THE SMALL CRAFT ADVISORY WILL MOST LIKELY BE DROPPED WITH THE NOON PACKAGE. && .HFO WATCHES/WARNINGS/ADVISORIES... SMALL CRAFT ADVISORY...COASTAL WATERS && BURKE
The radar
The national radar mosaic for the moment the first event began.
Event by event
1 flash flood. Local standard time, as filed.
What these are
- 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
- Dense Fog in Utah, February 12, 2005
- Flood in Arizona, February 12 to 14, 2005
- Frost and Freeze in Florida, February 12, 2005
- Blizzard in Alaska, February 12, 2005
- Flash Flooding in Arizona, February 12, 2005
- Frost and Freeze in Florida, February 12, 2005
- High Wind in Texas, February 12 to 13, 2005
- Heavy Snow in New York, February 12, 2005
- Flood in Arizona, February 12 to 14, 2005
- Heavy Snow in New York, February 12, 2005
More
Every storm in Hawaii in 2005Every state in 2005This day in weather historyWarnings in Hawaii, February 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: 5441542.