Flood Watch Issued for All Main Hawaiian Islands
The National Weather Service in Honolulu has issued a Flood Watch for all main Hawaiian Islands, in effect from Wednesday evening through Friday morning. The watch comes as remnant moisture from former Tropical Storm Norbert is expected to bring periods of moderate to heavy rainfall.
The National Weather Service (NWS) in Honolulu issued the Flood Watch on September 16 at 4:03 PM HST, with the active period beginning on September 16 at 6:00 PM HST and continuing until September 18 at 6:00 AM HST. The watch covers all main Hawaiian Islands, including Niihau, Kauai, Oahu, Lanai, Kahoolawe, Maui, and the Big Island.
Weather officials state that a band of remnant moisture from former Tropical Storm Norbert will move eastward across the islands. This system is expected to bring moderate to locally heavy showers, with a slight chance of thunderstorms on Thursday that could generate briefly higher rainfall rates and increase the risk of flash flooding.
Expected impacts include elevated runoff and overflowing streams, which may close flood-prone roads and low-lying areas. Urban areas are also at risk of experiencing more significant flooding and potential property damage due to rapid runoff.