Flood Advisory issued March 11 at 3:29AM HST until March 11 at 5:45AM HST by NWS Honolulu HI
Issue date: 2026-03-11T13:29+00:00
* WHAT...Flooding caused by excessive rainfall continues. * WHERE...The island of Oahu. * WHEN...Until 545 AM HST. * IMPACTS...Minor flooding on roads, poor drainage areas, and in streams. River or stream flows are elevated. Ponding of water in urban or other areas is occurring or is imminent. * ADDITIONAL DETAILS... - At 325 AM HST, radar indicated a band of heavy rain falling over Waianae and Nanakuli. Rain was falling at a rate of 1 to 2 inches per hour. Stream levels remain elevated and are rising. - Some locations that will experience flooding include...the entire island of Oahu.
Flood Watch issued March 11 at 3:06AM HST until March 14 at 6:00PM HST by NWS Honolulu HI
Issue date: 2026-03-11T13:06+00:00
...FLOOD WATCH IN EFFECT FOR NIIHAU KAUAI OAHU AND MAUI COUNTY THROUGH SATURDAY AFTERNOON... ...FLOOD WATCH IN EFFECT FOR THE BIG ISLAND FROM THIS EVENING THROUGH SATURDAY AFTERNOON... * WHAT...Flash flooding caused by excessive rainfall is possible. * WHERE...Oahu. * WHEN...Through Saturday 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... - Considerable flash flooding remains possible as a large and powerful kona storm northwest of the state draws deep tropical moisture northward across the islands. Persistent bands of heavy rain and thunderstorms may produce intense rainfall rates, leading to rapid rises in streams and flooding of roads and low-lying areas.
Special Weather Statement issued March 10 at 4:53PM HST by NWS Honolulu HI
Issue date: 2026-03-11T02:53+00:00
A powerful kona storm will impact the western end of the state tonight, then spread across the remainder of the smaller islands by midweek and the Big Island towards the end of the week. While flash flooding remains a major concern (see the Flood Watch for additional details), confidence is increasing that strong to severe thunderstorms may develop Wednesday into the weekend. Damaging winds will likely be the primary hazard with these storms, though large hail cannot be ruled out. In addition to the heavy rainfall and severe thunderstorm threat, strong and potentially damaging kona winds are possible late in the week and into the weekend.
