CURRENT WEATHER ADVISORIES FOR HAWAI’I

Flood Advisory

5/10/2024 02:12 HST through 5/10/2024 05:00 HST

Flood Advisory issued May 10 at 2:12AM HST until May 10 at 5:00AM HST by NWS Honolulu HI

* WHAT…Flooding caused by excessive rainfall. * WHERE…The island of Oahu in Honolulu County. * WHEN…Until 500 AM HST. * IMPACTS…Minor flooding on roads, poor drainage areas, and in streams. * ADDITIONAL DETAILS… – At 211 AM HST, radar indicated heavy rain over windward Oahu between Kaaawa and Turtle Bay. Rain was falling at a rate of 1 to 2 inches per hour. Area streams are also rising rapidly.

Instructions

Stay away from streams, drainage ditches and low lying areas prone to flooding. A Flood Watch is also in effect until 6 AM HST Saturday.

Sender

NWS Honolulu HI

Sent

5/10/2024 02:12 HST

Oahu in Honolulu, HI

Special Weather Statement

5/9/2024 16:51 HST through 5/10/2024 05:00 HST

Special Weather Statement issued May 9 at 4:51PM HST by NWS Honolulu HI

An unusually strong upper level disturbance moving over the state will bring the possibility strong to severe thunderstorms, which could produce damaging winds and large hail. The greatest chance for severe thunderstorms will occur during the day Friday through Friday evening. Listen for later statements, as well as possible watches and warnings, as this event becomes more clear. For details on the potential for flash flooding, please see the Flood Watch (FFAHFO) that is currently in effect for the entire State of Hawaii through 6 AM Saturday.

Sender

NWS Honolulu HI

Sent

5/9/2024 16:51 HST

Niihau; Kauai Southwest; Kauai Mountains; Waianae Coast; Oahu North Shore; Olomana; Central Oahu; Waianae Mountains; Lanai Mauka; Kahoolawe; Maui Windward West; Maui Leeward West; Haleakala Summit; Kona; Kohala; Big Island Interior; Big Island Summit; Kauai North; Kauai East; Kauai South; East Honolulu; Honolulu Metro; Ewa Plain; Koolau Windward; Koolau Leeward; Molokai Windward; Molokai Southeast; Molokai North; Molokai West; Molokai Leeward South; Lanai Windward; Lanai Leeward; Lanai South; Maui Central Valley North; Maui Central Valley South; Windward Haleakala; Kipahulu; South Maui/Upcountry; South Haleakala; Big Island South; Big Island Southeast; Big Island East; Big Island North

Winter Storm Warning

5/9/2024 15:51 HST through 5/11/2024 06:00 HST

Winter Storm Warning issued May 9 at 3:51PM HST until May 11 at 6:00AM HST by NWS Honolulu HI

…WINTER STORM WARNING IN EFFECT FROM NOON FRIDAY TO 6 AM HST SATURDAY FOR THE BIG ISLAND SUMMITS… * WHAT…Heavy snow and very strong winds expected. Total snow accumulations of up to 6 inches. Winds gusting over 70 mph. * WHERE…Big Island Summits. * WHEN…From noon Friday to 6 AM HST Saturday. * IMPACTS…Travel could be very difficult to impossible. Blowing snow will significantly reduce visibility at times, with periods of zero visibility.

Instructions

A Winter Storm Warning means significant amounts of snow, sleet, and ice are expected or occurring. Strong winds are also possible. This will make travel very hazardous or impossible. Any travel plans to the summits should be postponed until the threat diminishes.

Sender

NWS Honolulu HI

Sent

5/9/2024 15:51 HST

Big Island Summit

High Wind Warning

5/9/2024 15:46 HST through 5/11/2024 06:00 HST

High Wind Warning issued May 9 at 3:46PM HST until May 11 at 6:00AM HST by NWS Honolulu HI

…HIGH WIND WARNING IN EFFECT FROM 6 AM FRIDAY TO 6 AM HST SATURDAY FOR BIG ISLAND SUMMITS… * WHAT…Southwest winds 40 to 60 mph with localized gusts over 70 mph expected. * WHERE…Big Island Summits. * WHEN…From 6 AM Friday to 6 AM HST Saturday. * IMPACTS…Winds this strong can make driving and walking dangerous. The winds can forcefully open doors and damage hinges or slam doors shut, possibly causing injuries.

Instructions

Be prepared for road-closures. Postpone travel to the summits until conditions improve.

Sender

NWS Honolulu HI

Sent

5/9/2024 15:46 HST

Big Island Summit

Flood Watch

5/9/2024 15:42 HST through 5/11/2024 06:00 HST

Flood Watch issued May 9 at 3:42PM HST until May 11 at 6:00AM HST by NWS Honolulu HI

…FLOOD WATCH FOR THE STATE OF HAWAII THROUGH 6 AM SATURDAY… * WHAT…Flash flooding caused by excessive rainfall continues to be possible. * WHERE…All the main Hawaiian islands. * WHEN…Through late Friday night. * 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. Remember, flash flooding can occur well downstream. * ADDITIONAL DETAILS… – A strong upper level disturbance will bring heavy showers and isolated thunderstorms tonight through Friday and Friday night. The heaviest downpours will be hit or miss, but where they do occur, they will be capable of producing rainfall rates in excess of 3 inches per hour. The threat for flash flooding is expected to be the greatest Friday through Friday evening. Conditions should steadily improve from west to east late Friday into Saturday.

Instructions

Remember that it does not have to be raining at your location for flash flooding to occur. If you notice signs of heavy rain or thunderstorms upslope, move quickly away from flood prone areas. You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued.

Sender

NWS Honolulu HI

Sent

5/9/2024 15:42 HST

Updates

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Niihau; Kauai Southwest; Kauai Mountains; Waianae Coast; Oahu North Shore; Olomana; Central Oahu; Waianae Mountains; Lanai Mauka; Kahoolawe; Maui Windward West; Maui Leeward West; Haleakala Summit; Kona; Kohala; Big Island Interior; Kauai North; Kauai East; Kauai South; East Honolulu; Honolulu Metro; Ewa Plain; Koolau Windward; Koolau Leeward; Molokai Windward; Molokai Southeast; Molokai North; Molokai West; Molokai Leeward South; Lanai Windward; Lanai Leeward; Lanai South; Maui Central Valley North; Maui Central Valley South; Windward Haleakala; Kipahulu; South Maui/Upcountry; South Haleakala; Big Island South; Big Island Southeast; Big Island East; Big Island North

High Surf Advisory

5/9/2024 15:35 HST through 5/10/2024 18:00 HST

High Surf Advisory issued May 9 at 3:35PM HST until May 10 at 6:00PM HST by NWS Honolulu HI

…HIGH SURF ADVISORY FOR SOUTH FACING SHORES OF ALL HAWAIIAN ISLANDS UNTIL 6 PM HST FRIDAY… .A long-lived south swell will affect the islands during the next several days, keeping south shore surf at the High Surf Advisory threshold of 10 feet through Friday. * WHAT…Large breaking waves of 7 to 10 feet along south-facing shores. * WHERE…South-facing shores of all Hawaiian Islands. * WHEN…Until 6 PM HST Friday. * IMPACTS…Moderate. Strong breaking waves and strong currents will make swimming dangerous.

Instructions

Heed all advice from ocean safety officials. When in doubt, don’t go out.

Sender

NWS Honolulu HI

Sent

5/9/2024 15:35 HST

Updates

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Niihau; Kauai Southwest; Waianae Coast; Kahoolawe; Maui Leeward West; Kona; Kauai South; East Honolulu; Honolulu Metro; Ewa Plain; Molokai Leeward South; Lanai Leeward; Lanai South; Maui Central Valley South; South Maui/Upcountry; South Haleakala; Big Island South; Big Island Southeast