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Hawaiian Lifeguard Association

on behalf of

National Weather Service

Weather Forecast Office - Honolulu, HI

County of Hawaiʻi

Fire Department - Ocean Safety Division

City and County of Honolulu

Emergency Services Department - Ocean Safety and Lifeguard Services Division

County of Kauaʻi

Fire Department - Ocean Safety Bureau

County of Maui

Parks and Recreation - Aquatics Division

FOR IMMEDIATE RELEASE: Wednesday, September 12, 2018 - 6:01am HST

Flash Flood Watch

*** START NOTIFICATION ***

Effective: Wednesday, September 12, 2018 - 6:01am to Friday, September 14, 2018 - 6:00am

Alert:
...FLASH FLOOD WATCH FOR ALL HAWAIIAN ISLANDS...

...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH LATE THURSDAY NIGHT... The Flash Flood Watch continues for

* All Hawaiian islands.

* Through late Thursday night.

* Moisture from Tropical Storm Olivia is moving west across the islands. Olivia is forecast to produce total rainfall amounts of 5 to 10 inches. Maximum amounts of 15 inches will be possible along east sections and in higher terrain. The heaviest rain is over Maui County this morning. The heaviest rain may shift to Kauai starting Thursday as a low aloft interacts with the moisture from Olivia. Total rainfall amounts of 4 to 6 inches with isolated amounts to 8 inches are possible on Kauai.

* Rain events of this size can cause widespread flooding and can affect areas that do not usually flood. Low spots in roads will become dangerous and impassable due to severe runoff. Debris in streams and gulches may clog bridges and culverts resulting in dangerous flooding. Numerous landslides are expected, especially along the Hana Highway on Maui.
Description:

A Flash Flood Watch means heavy rain leading to flash flooding is possible.

Warning Instruction:
A Flash Flood Watch means that conditions may develop that lead to flash flooding. Flash flooding is LIFE THREATENING. Do not cross fast flowing water in your vehicle or on foot. Monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. If you experience heavy rain or rising water, head to higher ground immediately.

Unmonitored lands and waters in the impact area described in the alert will also be impacted.

If conditions change before expiration or the event needs to be extended, an update or cancellation will be issued from Hawaii Beach Safety Website.

** END NOTIFICATION ***

171
Alert Identifier: 9291
  • kauai
  • oahu
  • maui
  • hawaii