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Flash Flood Watch, High Surf Warning issued in advance of Hurricane Madeline

Weather advisory map via National Weather Service/NOAA

Weather advisory map via National Weather Service/NOAA

Note that flood, wind and surf advisories are contained in the Hurricane Watch that has been issued for Hawaii.

Flash Flood Watch

The National Weather Service in Honolulu has issued a Flash Flood Watch for Hawaii Island on Wednesday and Thursday.

Although some uncertainty remains regarding the track of madeline, deep moisture associated with the hurricane is expected to impact Hawaii Island by Wednesday morning, bringing the threat of heavy flooding rainfall through late Thursday. Total rain accumulations of 5 to 10 inches are possible, with isolated maximum amounts near 15 inches, especially over windward portions of the Big Island. This rainfall may lead to dangerous flash floods and mudslides.

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.

High Surf Warning

Large and damaging surf is possible along east facing shores. Surf is expected to build to 10 to 18 feet on Tuesday and to 15 to 25 feet on Wednesday and Wednesday night. This may cause significant wave runup or damage to coastal properties and infrastructure, including roadways. Powerful longshore and rip currents will be present at most beaches. Large breaking waves and strong currents may impact harbor entrances and channels causing challenging boat handling.

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

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