Weather Alerts For Hawaii National Park, HI

# HEADLINE -------------------- FLOOD WATCH IN EFFECT FROM SUNDAY EVENING THROUGH TUESDAY AFTERNOON # SUMMARY -------------------- .Moisture along the eastern flank of Hurricane Lowell will bring periods of heavy rain to the main Hawaiian Islands late Sunday through Tuesday. # DETAILS -------------------- WHAT Flash flooding caused by excessive rainfall is possible. WHERE All main Hawaiian Islands. WHEN From Sunday evening through Tuesday 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 eastern flank of Hurricane Lowell will bring periods of heavy rain to the main Hawaiian islands late Sunday through Tuesday. Initially, the threat of heavy rain will be highest along windward and mountain areas, then the threat will spread everywhere as the winds become more southerly by Monday. - The entire state. ISSUED AT Saturday, September 5, 2026 at 3:44 PM HST ISSUED BY National Weather Service Honolulu HI HEADER URGENT - IMMEDIATE BROADCAST REQUESTED | Flood Watch # PRECAUTIONARY/PREPAREDNESS ACTIONS -------------------- You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. # AREAS AFFECTED -------------------- Kahoolawe, Kauai East, Kona, Koolau Windward, Lanai Leeward, Molokai North, South Haleakala, Big Island East, Big Island Interior, Big Island North, Big Island South, Big Island Southeast, Big Island Summits, Central Oahu, East Honolulu, Ewa Plain, Haleakala Summit, Honolulu Metro, Kauai Mountains, Kauai North, Kauai South, Kauai Southwest, Kipahulu, Kohala, Koolau Leeward, Lanai Mauka, Lanai South, Lanai Windward, Maui Central Valley North, Maui Central Valley South, Maui Leeward West, Maui Windward West, Molokai Leeward South, Molokai Southeast, Molokai West, Molokai Windward, Niihau, Oahu North Shore, Olomana, South Maui/Upcountry, Waianae Coast, Waianae Mountains, Windward Haleakala

# HEADLINE -------------------- HIGH SURF ADVISORY FOR SOUTH AND EAST FACING SHORES THROUGH MONDAY NIGHT HIGH SURF ADVISORY NOW IN EFFECT UNTIL 6 AM HST TUESDAY # SUMMARY -------------------- South and southwesterly swells from Hurricane Lowell will keep surf elevated above High Surf Advisory conditions across south- and west-facing shores through at least Sunday. A forecasted northward turn will cause an increase in swell, likely bringing surf along these shores rapidly to warning levels by Monday. These swells are then expected to drop off quickly on Tuesday. A large, medium- period east swell from Tropical Storm Karina will also persist through at least Monday, producing advisory level surf along east facing shores. # DETAILS -------------------- WHAT Surf up to 14 feet along east facing shores. Surf up to 12 feet along south facing shores, increasing to 14 feet by Sunday night. Surf up to 10 feet along west facing shores of the Big Island. WHERE South and east facing shores of all Hawaiian Islands... and west facing shores of the Big Island. WHEN Until 6 AM HST Tuesday. IMPACTS Moderate. Strong breaking waves and strong currents will make swimming dangerous. ADDITIONAL DETAILS The High Surf Advisory is expected to be upgraded to a warning for affected south- and west-facing shores Sunday night into Monday as surf heights are expected to rapidly rise to warning levels. ISSUED AT Saturday, September 5, 2026 at 3:57 PM HST ISSUED BY National Weather Service Honolulu HI HEADER Coastal Hazard Message # PRECAUTIONARY/PREPAREDNESS ACTIONS -------------------- Heed all advice from ocean safety officials. When in doubt, don't go out. Large breaking surf, significant shorebreak, and dangerous currents make entering the water very hazardous. # AREAS AFFECTED -------------------- Big Island North, Big Island South, Honolulu Metro, Lanai Leeward, Maui Leeward West, Molokai Southeast, Windward Haleakala, Big Island East, Big Island Southeast, East Honolulu, Ewa Plain, Kahoolawe, Kauai East, Kauai South, Kauai Southwest, Kipahulu, Kona, Koolau Windward, Lanai South, Maui Central Valley South, Molokai Leeward South, Molokai West, Molokai Windward, Niihau, Olomana, South Haleakala, South Maui/Upcountry, Waianae Coast