289
WGHW60 PHFO 151355
FFAHFO

Flood Watch
National Weather Service Honolulu HI
355 AM HST Sat Aug 15 2026

.Tropical Cyclone Lala will bring heavy rain to the Big Island and
Maui County through late tonight and Oahu, Kauai, and Niihau this
evening through late Sunday night.

HIZ017-018-022-023-026>028-045>054-160400-
/O.CON.PHFO.FA.A.0009.000000T0000Z-260816T1600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Maui Windward West-Maui Leeward West-Haleakala Summit-Kona-Kohala-
Big Island Interior-Big Island Summits-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-
355 AM HST Sat Aug 15 2026

...FLOOD WATCH REMAINS IN EFFECT THROUGH LATE TONIGHT...

* WHAT...Flash flooding caused by excessive rainfall will be
  possible.

* WHERE...The Big Island and Maui.

* WHEN...Through late tonight.

* IMPACTS...Significant flooding may occur due to the overflow of
  streams and drainages. Roads in several areas may be closed, along
  with property damage in urban or low lying spots due to runoff.
  Landslides may also occur in areas with steep terrain.

* ADDITIONAL DETAILS...
  - Tropical Cyclone Lala will bring heavy rain to the Big Island and
    Maui through late tonight. At this time, amounts of 10 to 20
    inches are possible over windward areas of Big Island, with 8 to
    12 inches over windward areas of Maui. Higher localized amounts
    are possible.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.

&&

$$

HIZ015-016-037>044-160400-
/O.CON.PHFO.FA.A.0009.000000T0000Z-260816T1600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Lanai Mauka-Kahoolawe-Molokai Windward-Molokai Southeast-Molokai
North-Molokai West-Molokai Leeward South-Lanai Windward-Lanai
Leeward-Lanai South-
355 AM HST Sat Aug 15 2026

...FLOOD WATCH REMAINS IN EFFECT THROUGH LATE TONIGHT...

* WHAT...Flooding caused by excessive rainfall continues to be
  possible.

* WHERE...Lanai, Molokai, and Kahoolawe.

* 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...
  - Tropical Cyclone Lala will bring heavy rain to Maui County
    through late tonight. Current forecast has rainfall amounts of 4
    to 6 inches with local amounts up to 8 inches.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.

&&

$$

HIZ001-003-004-006-007-009>011-029>036-160400-
/O.CON.PHFO.FA.A.0009.260816T0400Z-260817T1600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Niihau-Kauai Southwest-Kauai Mountains-Waianae Coast-Oahu North
Shore-Olomana-Central Oahu-Waianae Mountains-Kauai North-Kauai
East-Kauai South-East Honolulu-Honolulu Metro-Ewa Plain-Koolau
Windward-Koolau Leeward-
355 AM HST Sat Aug 15 2026

...FLOOD WATCH REMAINS IN EFFECT FROM THIS EVENING THROUGH LATE
SUNDAY NIGHT...

* WHAT...Flash flooding caused by excessive rainfall continues to be
  possible.

* WHERE...Kauai, Niihau, and Oahu.

* WHEN...From this evening through late Sunday 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.

* ADDITIONAL DETAILS...
  - Tropical Cyclone Lala will bring periods of heavy rain to Kauai,
    Niihau, and Oahu this evening through late Sunday night. Current
    forecast has rainfall amounts of 4 to 6 inches with local amounts
    up to 8 inches.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.

&&

$$

JT