April 17, 2026

Wind advisory and Hydrologic Outlook

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Wind Advisory issued January 23 at 3:35AM HST until January 24 at 6:00AM HST by NWS Honolulu

…WIND ADVISORY FOR PORTIONS OF ALL ISLANDS…
…WIND ADVISORY REMAINS IN EFFECT UNTIL 6 AM HST SUNDAY…
* WHAT…East winds 20 to 30 mph, with gusts to 50 mph expected.
Winds will be strongest over and immediately downwind of the
mountains.
* WHERE…Portions of all islands.
* WHEN…Until 6 AM HST Sunday.
* IMPACTS…Winds this strong are capable of downing tents or
other temporary structures, as well as downing trees and causing
power outages.

Instructions:
Motorists, especially those in high profile vehicles, are urged
to drive with extreme caution.

Counties:
Big Island Interior; Big Island North and East; Kahoolawe; Kauai Leeward; Kauai Mountains; Kohala; Lanai Makai; Leeward Haleakala; Maui Leeward West; Maui Windward West; Molokai Windward; Oahu Koolau; Oahu South Shore; Olomana; South Big Island; Waianae Mountains; Windward Haleakala


Hydrologic Outlook issued January 23 at 4:48AM HST by NWS Honolulu

…POTENTIAL FOR WIDESPREAD HEAVY RAIN BEGINNING SUNDAY AND MONDAY…
Strong trade winds are expected to bring brief and passing windward
showers through most of the weekend, but the strong winds are
expected to shift to the southeast late Sunday and Monday, bringing
deep moisture over the islands.
A slow-moving convergence band is expected to develop, bringing the
threat of several days of rainfall, with locally heavy showers
possible. This band could lead to the development of training
rainfall over the islands, where showers repeatedly form and move
over the same area, potentially leading to flash flooding.
While it is too early to provide specifics as to where and when the
heaviest rain will occur, there is the potential for heavy rain to
affect at least portions of the islands from late Sunday into the
middle of next week.
Keep up to date with the latest forecast information through the
Internet (weather.gov/hawaii), local media, social media, or NOAA
Weather Radio broadcasts. An updated Hydrologic Outlook will be
issued by 6 PM HST this evening.

Counties:
Big Island Interior; Big Island North and East; Big Island Summit; Central Oahu; Haleakala Summit; Kahoolawe; Kauai Leeward; Kauai Mountains; Kauai Windward; Kohala; Kona; Lanai Makai; Lanai Mauka; Leeward Haleakala; Maui Central Valley; Maui Leeward West; Maui Windward West; Molokai Leeward; Molokai Windward; Niihau; Oahu Koolau; Oahu North Shore; Oahu South Shore; Olomana; South Big Island; Waianae Coast; Waianae Mountains; Windward Haleakala

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