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Flash Flood Watch issued for Hawaii Island

Weather advisory map via National Weather Service/NOAA

Weather advisory map via National Weather Service/NOAA

Flood Advisory

The National Weather Service in Honolulu has issued a flood advisory for Hawaii Island until 9:45 a.m. today (Nov 19).

At 6:48 a.m. weather radar showed heavy rain causing minor flooding in the advisory area. Heavy rain was located over parts of Ka‘u, Puna and south Hilo districts. Rain was falling at 1-2 inches per hour in the heaviest showers.

Locations in the advisory include, but are not limited to, Hilo, Pahoa, Volcano and Pahala.

This advisory may be extended beyond 9:45 a.m. should the heavy rains continue.

Flash Flood Watch

A flash flood watch is also in effect for Hawaii Island through late Friday night (Nov 20). Locally heavy rainfall may lead to flash flooding with the rains moving in from the east and southeast. The main threat of heavy rain will be over the windward side of Hawaii Island mainly in the Ka‘u, Puna and Hilo districts. All of Hawaii Island is included in the watch area.

Campers and hikers should avoid low lying flood prone areas. People should stay away from streams, drainage ditches and low lying areas prone to flooding. The rainfall and runoff will cause hazardous driving conditions due to ponding, reduced visibility and poor braking action. Excessive runoff may cause rockslides and mudslides in steep terrain.

Debris in streams and gulches may clog bridges and culverts resulting in flooding outside normal water channels causing damage.

Do not cross fast flowing or rising water in your vehicle or on foot. Turn around, don’t drown.

For links to the latest weather forecasts, reports, radar and satellite imagery visit our Weather Page at hawaii247.com/weather

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