21°28'北 / 158°12'西 / 高度 18 m / 03:17 2026-03-21, Pacific/Honolulu (UTC-10)
開始于: 2026-03-20, 17:12
到: 2026-03-21, 06:00
...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.
Oahu in Honolulu,Waianae Coast
You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.
NWS Honolulu HI
2026-03-20, 17:12開始于: 2026-03-21, 01:56
到: 2026-03-21, 05:00
FFWHFO
The National Weather Service in Honolulu has extended the
* Flash Flood Warning for... The island of Oahu in Honolulu County
* Until 500 AM HST.
* At 156 AM HST, emergency management reported numerous closed roads due to flooding. While the latest radar shows a significant decrease in shower coverage and intensity, return showers are expected into the early morning hours. 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.
Oahu in Honolulu, HIStay 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.NWS Honolulu HI2026-03-21, 01:56
開始于: 2026-03-21, 06:00
到: 2026-03-21, 12:00
...HIGH SURF ADVISORY FOR NORTH FACING SHORES OF NIIHAU KAUAI AND OAHU...
.A northly swell is building in and will create large surf for north facing shores peaking Saturday afternoon and then slowly declining Saturday night.
* WHAT...Large breaking waves rising to 12 to 16 feet.
* WHERE...North shores of Niihau, Kauai, and Oahu.
* WHEN...From 6 AM Saturday to 6 AM HST Sunday.
* IMPACTS...Moderate. Strong breaking waves and strong currents will make swimming dangerous.
Oahu in HonoluluHeed all advice from ocean safety officials. When in doubt, don't
go out.NWS Honolulu HI2026-03-20, 22:51