Active Weather Alerts
Special Marine Warning
Issued: 7:34 PM Sep. 17, 2026 – National Weather Service
The National Weather Service in Honolulu has issued a * Special Marine Warning for... Alenuihaha Channel... Big Island Leeward Waters... Big Island Windward Waters... * Until 1030 AM HST. * At 933 AM HST, strong thunderstorms were located along a line extending from 10 nm north of Upolu Point to 8 nm north of FAD Buoy HK. The strong thunderstorms were nearly stationary. HAZARD...Wind gusts 34 knots or greater and small hail. SOURCE...Radar. IMPACT...Small craft could be damaged in briefly higher winds and suddenly higher waves. * Locations impacted include... FAD Buoy HK and Upolu Point. PRECAUTIONARY/PREPAREDNESS ACTIONS... Prepare for gusty winds, steep and fast-building seas, and blinding downpours. Stay low or go below, and make sure all on board are wearing life jackets. && HAIL...<.75IN; WIND...>34KTS
Small Craft Advisory
Issued: 1:21 PM Sep. 17, 2026 – National Weather Service
...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 6 AM HST SATURDAY... * WHAT...East winds 15 to 25 kt with gusts up to 35 kt and seas 4 to 6 feet. * WHERE...Maalaea Bay, Pailolo Channel, Alenuihaha Channel, Big Island Leeward Waters and Big Island Southeast Waters. * WHEN...Until 6 AM HST Saturday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in these conditions. &&
Flood Watch
Issued: 1:15 PM Sep. 17, 2026 – National Weather Service
...FLOOD WATCH REMAINS IN EFFECT THROUGH LATE TONIGHT... * WHAT...Flash flooding caused by excessive rainfall continues to be possible. * WHERE...All main Hawaiian Islands. * WHEN...Through late tonight. * IMPACTS...Flood prone roads and other low lying areas may be closed due to elevated runoff and overflowing streams. Urban areas may receive more significant flooding and property damage due to rapid runoff. * ADDITIONAL DETAILS... - A band of remnant moisture from Norbert will move west across the islands through Friday, bringing moderate to locally heavy showers to mainly windward sides of the islands. There is a slight chance of thunderstorms as well, which could produce briefly higher rain rates, increasing the risk of flash flooding. PRECAUTIONARY/PREPAREDNESS ACTIONS... You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. &&
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