056
WGHW60 PHFO 160017
FFAHFO
URGENT - IMMEDIATE BROADCAST REQUESTED
FLOOD WATCH
NATIONAL WEATHER SERVICE HONOLULU HI
217 PM HST FRI MAY 15 2026
..FLOOD WATCH CANCELLED FOR KAUAI AND NIIHAU
..FLOOD WATCH HAS BEEN ISSUED FOR BIG ISLAND THROUGH 6 AM HST
...FLOOD WATCH HAS BEEN EXTENDED FOR OAHU, MOLOKAI, LANAI, AND MAUI
THROUGH 6 AM HST...
HIZ001-003-004-029>031-160130-
/O.CAN.PHFO.FA.A.0008.000000T0000Z-260516T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
NIIHAU-KAUAI SOUTHWEST-KAUAI MOUNTAINS-KAUAI NORTH-KAUAI EAST-
KAUAI SOUTH-
217 PM HST FRI MAY 15 2026
THE FLASH FLOOD WATCH IS CANCELLED FOR THE ISLAND OF KAUAI AND THE
ISLAND OF NIIHAU.
THE FLASH FLOODING THREAT HAS ENDED. THEREFORE, THE FLASH FLOOD
WATCH IS BEING CANCELLED.
HIZ023-026>028-051>054-161600-
/O.EXB.PHFO.FA.A.0008.000000T0000Z-260516T1600Z/
/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-
217 PM HST FRI MAY 15 2026
* WHAT...FLASH FLOODING CAUSED BY EXCESSIVE RAINFALL IS POSSIBLE.
* WHERE...THE BIG ISLAND.
* WHEN...THROUGH 6 AM HST SATURDAY MORNING.
* 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...
- AN UPPER LEVEL LOW AND ASSOCIATED SURFACE BOUNDARY WILL
PROVIDE CONDITIONS FAVORABLE FOR HEAVY RAIN THROUGH TONIGHT.
HEAVY RAIN HAS BEEN OBSERVED ON OAHU AND MOLOKAI, AND THIS
FEATURE IS MOVING TOWARD BIG ISLAND TONIGHT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
YOU SHOULD MONITOR LATER FORECASTS AND BE PREPARED TO TAKE ACTION
SHOULD FLASH FLOOD WARNINGS BE ISSUED.
HIZ006-007-009>011-015>018-022-032>050-161600-
/O.EXT.PHFO.FA.A.0008.000000T0000Z-260516T1600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WAIANAE COAST-OAHU NORTH SHORE-OLOMANA-CENTRAL OAHU-WAIANAE
MOUNTAINS-LANAI MAUKA-KAHOOLAWE-MAUI WINDWARD WEST-MAUI LEEWARD
WEST-HALEAKALA SUMMIT-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-
217 PM HST FRI MAY 15 2026
* WHAT...FLASH FLOODING CAUSED BY EXCESSIVE RAINFALL HAS ALREADY
OCCURRED AND CONTINUES TO BE POSSIBLE THROUGH TONIGHT.
* WHERE...OAHU, MAUI, MOLOKAI, LANAI, AND KAHOOLAWE.
* WHEN...THROUGH 6 AM HST SATURDAY MORNING.
* 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...
- AN UPPER LEVEL LOW AND ASSOCIATED SURFACE BOUNDARY WILL
PROVIDE CONDITIONS FAVORABLE FOR HEAVY RAIN THROUGH TONIGHT.
HEAVY RAIN HAS ALREADY BEEN OBSERVED OVER PORTIONS OF THE
WATCH AREA, AND CONDITIONS WILL NOT CHANGE MUCH OVERNIGHT.
THEREFORE, THE WATCH IS BEING EXTENDED IN TIME.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
YOU SHOULD MONITOR LATER FORECASTS AND BE PREPARED TO TAKE ACTION
SHOULD FLASH FLOOD WARNINGS BE ISSUED.
SP
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