Weather Forecast for Honolulu

...FLOOD WATCH IN EFFECT THROUGH SUNDAY AFTERNOON FOR ALL ISLANDS IN THE STATE OF HAWAII... * WHAT...Flash flooding caused by excessive rainfall is possible. * WHERE...The island of Oahu, Molokai, Lanai, Kahoolawe, Maui, and the Big Island. * WHEN...Through Sunday afternoon. * IMPACTS...Significant flooding may occur due to the overflow of streams and drainages. Roads in several areas may be closed, along with property damage in urban or low lying spots due to runoff. Landslides may also occur in areas with steep terrain. * ADDITIONAL DETAILS... - A kona low developing west of the islands will draw abundant moisture northward as it strengthens and eventually departs to north early next week. Several rounds of moderate to heavy rainfall and thunderstorms are expected. The heaviest rain is expected to last through Saturday, except for the Big Island where the heaviest rain is expected on Sunday.

You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued.

FFWHFO The National Weather Service in Honolulu has extended the * Flash Flood Warning for... A Dam Failure on the Kaukonahua Stream below Wahiawa Dam on... The island of Oahu in Honolulu County * Until 115 PM HST Saturday. * At 105 PM HST, emergency management reported the imminent failure of Wahiawa Dam. HAZARD...Flash flooding from the imminent failure of Wahiawa Dam. SOURCE...Emergency management. IMPACT...Flooding of areas downstream from the Wahiawa Dam along the Kaukonahua Stream. * The nearest downstream area from the dam is Waialua, Haleiwa, and Kaukonahua Stream. This includes the following streams and drainages... Poamoho Stm- Dole Fields, Poamoho Stm- Kaukonahua Hwy, Kaukonahua Stm- Schofield, Mohiakea Gul, Waialua Town, Kaukonahua Stm- N Fork Wahiawa, Kaukonahua Stm- Wahiawa, Kiikii Stm- Waialua, Helemano/Opaeula Stm- Haleiwa, Kaukonahua Stm- Waialua and Anahulu R- Haleiwa. Flooding is occurring along the Kaukonahua Stream. This warning may need to be extended beyond 115 PM HST Saturday if flooding persists.

FFWHFO The National Weather Service in Honolulu has extended the * Flash Flood Warning for... The island of Oahu in Honolulu County * Until 1100 PM HST. * At 749 PM HST, emergency management reported numerous closed roads due to flooding from earlier today. Latest radar shows a decrease in shower intensity, but heavy showers will be possible tonight. The Wahiawa Reservoir remains elevated and will continue to be a concern due to additional heavy rain expected over the next few days. HAZARD...Flash flooding caused by heavy rain. SOURCE...Emergency management. IMPACT...Flooding in drainages, streams, rivers, roads, properties, and other low-lying areas. Public road closures possible in some areas. Landslides are possible in steep terrain. * Some locations that will experience flash flooding include... Wahiawa, Schofield Barracks, Wheeler Field, Haleiwa, Waialua, Mililani, Hauula, Laie, Waianae, Punaluu, Kahuku, Nanakuli, Waikane, Kaaawa, Helemano Housing, Whitmore Village, Waimea Valley, Waimea Bay, Mokuleia and Pupukea.

Stay away from streams, rivers, drainage ditches, and culverts, even if they are currently dry. Do not cross fast flowing or rising water in your vehicle, or on foot. Turn around, don't drown. Be especially cautious at night when it is harder to recognize the dangers of flooding.

At 649 PM HST, radar indicated moderate to locally heavy rain over parts of leeward and east Oahu. Rain was falling at a rate of 0.5 to 1.5 inches per hour. Additional bands of moderate to locally heavy showers will be possible through tonight. Flash Flooding is ongoing, or is expected to begin shortly. HAZARD...Flash flooding caused by heavy rain. SOURCE...Radar. IMPACT...Flooding in drainages, streams, rivers, roads, properties, and other low-lying areas. Public road closures possible in some areas. Landslides are possible in steep terrain. Some locations that will experience flash flooding include... Honolulu, Waipio, Moanalua, Halawa, Salt Lake, Aiea, Kalihi, Pearl City, Ahuimanu, Iroquois Point, Manoa, Kahaluu, Kaneohe, Waiahole, Waipahu, Waikele, Palolo, Maunawili, Waikane and Ewa Beach.

Stay away from streams, rivers, drainage ditches, and culverts, even if they are currently dry. Excessive runoff from heavy rainfall will cause flooding of drainage ditches and streams, streets, highways, properties, and other low lying spots.

...FLOOD WATCH IN EFFECT THROUGH SUNDAY AFTERNOON FOR ALL ISLANDS IN THE STATE OF HAWAII... * WHAT...Flash flooding caused by excessive rainfall is possible. * WHERE...The island of Oahu in Honolulu County, Maui, Molokai, Lanai, Kahoolawe, and the Big Island. * WHEN...Through Sunday afternoon. * IMPACTS...Significant flooding may occur due to the overflow of streams and drainages. Roads in several areas may be closed, along with property damage in urban or low lying spots due to runoff. Landslides may also occur in areas with steep terrain. * ADDITIONAL DETAILS... - A kona low developing west of the islands will draw abundant moisture northward as it strengthens and eventually departs to north early next week. Several rounds of moderate to heavy rainfall are anticipated. The heaviest rain is expected from Friday night through Saturday, except for the Big Island where the heaviest rain is expected on Sunday.

You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued.