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Flash flood watch for Hawaii Island

Weather advisory map via National Weather Service/NOAA

Weather advisory map via National Weather Service/NOAA

A flash flood watch is in effect for Hawaii Island through tonight (Sept 27).

Rain from Tropical Storm Niala will spread across Hawaii Island through Monday with the eastern and southern slopes seeing the heaviest rainfall. Rain should reach all parts of the island.

Rainfall in amounts of 1-4 inches are possible with locally higher amounts. Because of already saturated ground conditions quicker and more widespread flooding can occur.

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

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