Flood Watch Extended for Niihau, Kauai, and All Main Hawaiian Islands Through Tuesday Afternoon
The Flood Watch for all main Hawaiian Islands now runs from Sunday evening through Tuesday afternoon, longer than initially issued.
4 reports on this incident · first at Sep 5, 2026, 9:50 p.m. ET
Earlier reports
Sep 5, 2026, 10:24 p.m. ET
Flood Watch Extended Through Late Monday Night for Niihau, Kauai, and Other Hawaiian Islands
A Flood Watch remains in effect for Niihau, Kauai Southwest, Kauai Mountains, and other areas across the main Hawaiian Islands through late Monday night, September 7, 2026. The watch was issued by the National Weather Service Honolulu HI on September 5, 2026, at 3:44 p.m. HST, according to the official record.
The watch is in effect from 6:00 p.m. HST on September 6 through 6:00 p.m. HST on September 8. Flash flooding caused by excessive rainfall is possible. 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.
The watch applies to 43 zones across the islands, including Niihau, Kauai, Oahu, Maui, Molokai, Lanai, and the Big Island. Residents are advised to monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued.
Sep 5, 2026, 9:53 p.m. ET
National Weather Service Extends Flood Watch for Niihau, Kauai Southwest, Kauai Mountains Through Late Monday Night
The National Weather Service in Honolulu has issued a Flood Watch for Niihau, Kauai Southwest, and Kauai Mountains, effective from 6:00 p.m. Sunday, September 6, through 6:00 p.m. Tuesday, September 8. The watch is in effect through late Monday night, September 7, 2026, and covers 43 zones across the state, including these areas.
Flash flooding caused by excessive rainfall is possible. Flood-prone roads and other low-lying areas may be closed due to elevated runoff and overflowing streams. Urban areas may experience more significant flooding and property damage due to rapid runoff.
The watch was issued at 3:44 p.m. on September 5. Residents are advised to monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued.
Sep 5, 2026, 9:50 p.m. ETFirst report
National Weather Service Extends Flood Watch for Niihau, Kauai and Other Hawaiian Islands Through Late Monday Night
The National Weather Service in Honolulu has issued a Flood Watch for all main Hawaiian Islands, effective from 6:00 p.m. HST Sunday, September 6, 2026, through 6:00 p.m. HST Tuesday, September 8, 2026. The watch was issued at 3:44 p.m. HST on September 5, 2026.
As of Monday, September 7, 2026, the watch remains in effect. The watch covers 43 zones across the islands, including Niihau, Kauai Southwest, Kauai Mountains, and other areas on Oahu, Molokai, Lanai, Maui, and the Big Island. Flash flooding caused by excessive rainfall is possible. 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.
Residents are advised to monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued.
Was this report accurate and useful?
Sources
Revision history
- Version 16 Sept 2026, 02:25current
First published.
- Version 16 Sept 2026, 01:53current
First published.
- Version 16 Sept 2026, 01:50current
First published.
- Version 16 Sept 2026, 02:24current
First published.
How we work
This site models an investigative reporter rather than a wire desk. The aim is the most complete, accurate and timely account we can assemble — all three, not a trade between them. Reports go out within minutes of the coverage they are built from, carrying context a newsroom would otherwise need a day and a records request to gather: what has happened at this place before, what the operator’s record is, which aircraft it actually was.
Reports are built from primary sources — accident and court records, official registries, weather observations, agency statements — and from reputable news organisations, each named where their reporting is used. Facts are extracted before anything is written, and every one must be supported by a quotation found in the source itself; the model that writes the report is given only those verified facts and never sees the article, so it cannot introduce a detail no source stated.
Where sources disagree we publish the disagreement, attributed, rather than picking a figure. Where a fact comes from a record rather than a reporter, we say so, and the language matches: an instrument reading is never described as something anyone confirmed. Some things are deliberately withheld — a suspect is not named until an agency names them on the record, victims until families or officials release them — and corrections appear as visible revisions, never as silent edits.
None of that makes a report true. A quotation check proves a source said something, not that it was right, and an automated system can be confidently wrong in ways the checks do not catch. If something here is wrong, the feedback above is how it gets found. The full methodology, including what we refuse to publish.