WGHW60 PHFO 240122 FFAHFO Flood Watch National Weather Service Honolulu HI 322 PM HST Sun Aug 23 2026 .Moisture on the northern periphery of Tropical Storm Moke expected to bring areas of heavy rain to portions of the Big Island through Monday afternoon. HIZ023-026>028-051>054-241530- /O.CON.PHFO.FA.A.0010.000000T0000Z-260825T0400Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Kona-Kohala-Big Island Interior-Big Island Summits-Big Island South-Big Island Southeast-Big Island East-Big Island North- 322 PM HST Sun Aug 23 2026 ...FLOOD WATCH REMAINS IN EFFECT THROUGH MONDAY AFTERNOON... * WHAT...Flash flooding caused by excessive rainfall is possible, mainly for windward and southeast Big Island. * WHERE...The Big Island. * WHEN...Through Monday afternoon. * 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... - Moisture along the northern periphery of Tropical Storm Moke is expected to bring periods of heavy rain to the Big Island through Monday afternoon. Additional rainfall of 3 to 6 inches is possible over the windward and southeast slopes of the Big Island. It will not take a significant amount of rain to cause flash flooding due to saturated grounds from recent heavy rain. PRECAUTIONARY/PREPAREDNESS ACTIONS... You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$ DW