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Multiple weather advisories issued for Hawaii Island

Weather advisory map via National Weather Service/NOAA

Weather advisory map via National Weather Service/NOAA

Flash Flood Watch

The National Weather Service in Honolulu has issued a Flash Flood Watch for Hawaii Island Thursday afternoon through Friday (Dec 1-2).

The combination of an unstable atmosphere and increasing moisture will lead to potentially widespread heavy rain.

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 Advisory

A High Surf Advisory is in effect until 6 p.m. Friday (Dec 2) for Hawaii Island east facing shores along south, north and east coasts.

Surf in the 6-10 foot range is forecast.

Coastal areas can expect strong breaking waves, shore breaks and strong longshore and rip currents making swimming difficult and dangerous.

Beachgoers, swimmers and surfers should heed the advice given by ocean safety officials and be careful. Know your limits and when in doubt, don’t go out.

Boaters should expect recreational surfers and bodyboarders using harbor channels to access surfing areas.

Wind Advisory

A Wind Advisory is in effect for Hawaii Island until 10 p.m. this evening (Nov 30). Areas of strong trade winds will be in Ka‘u, North and East Kohala, interior locations, South Point, Pahala, Hilo, Volcano, Honokaa, Waimea, Waikoloa, Bradshaw Field and the Saddle Road area above 5,000 feet in elevation.

Winds are forecast to be in the 25-35 mph range with gusts to 50 mph.

The strong winds can send trees, branches and other objects into roadways, power lines and/or equipment. Winds this strong can damage roofs and cause flying debris if outdoor items are not properly tied down. These winds can make driving difficult especially for high profile vehicles. The winds can also forcefully swing doors open or shut so use caution when opening or closing vehicle doors.

Hawaii Electric Light Company (HELCO) reminds people that if you see a downed power line you should stay as far away as possible and report any damage or outages to their dispatch center at (808) 969-6666.

Winter Storm Watch

The National Weather Service in Honolulu has issued a Winter Storm Watch for Hawaii Island summits from Thursday afternoon through Friday afternoon.

Heavy snow with accumulations in excess of 6 inches is possible. There is also the potential for sleet and also ice accumulations on summit roadways.

For updated information on summit road conditions visit: mkwc.ifa.hawaii.edu/current/ro…

Gale Warning

A Gale Warning remains in effect until 6 a.m. Thursday (Dec 1) for the Maalaea Bay, the Pailolo and Alenuihaha Channels, Hawaii Island leeward and southeast waters.

Winds and sea are forecast to have east gales 30-35 knots, rough seas 10-15 feet with levels being the highest in the channels and south of Hawaii Island.

Small Craft Advisory

A Small Craft Advisory is in effect for Hawaii Island windward waters until 6 p.m. Thursday (Dec 1). A high pressure system northeast of the island will produce strong trade winds across the state.

Windward waters will experience east to northeast winds 25-30 knots and seas 9-12 feet.

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

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Dec 2, 2016 / 5:15 pm

 

 

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