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Wind advisory posted for Big Isle summits as ‘potent’ weather system nears isles

UPDATE: 7:30 a.m.

A wind advisory is in effect for the summits of Hawaii island through 6 a.m. Friday.

Visitors to Mauna Kea and Mauna Loa can expect westerly winds of 25 to 45 mph with localized gusts over 65 mph over the summits, according to the National Weather Service.

Motorists are advised to use extra caution.

Meanwhile, a “potent” low-pressure system approaching the islands from the north is expected to bring “strong and potentially damaging” winds from the north to northwest starting late Friday and continuing through the weekend, weather officials said.

“While these winds are expected to be strongest over ridges and mountaintops, they will also accelerate downslope, impacting heavily populated areas,” the NWS said in a special weather statement.


Got plans to hike or camp out this weekend?

Weather officials warn of the potential for strong winds and coastal flooding for all Hawaiian isles this weekend as a cold front approaches.

A cold front is expected to move down the island chain Thursday night and Friday, bringing strong winds through the weekend.

Temperatures tonight are expected to range between lows of 59 to 67 degrees on Oahu’s south shore, between 61 to 68 for the Waianae Coast, 58 to 64 in Central Oahu, and 63 to 69 for Windward Oahu.

The National Weather Service issued a special weather statement warning of the potential for strong winds and coastal flooding this weekend covering all the islands — from Niihau to the Big Island interior and summits.

“A powerful low pressure system is expected to move toward islands from the north over the weekend, bringing multiple weather hazards,” said the statement. “While the details and exact timing still remain uncertain, this low will bring the potential for strong and gusty north to northwest winds from Friday into the weekend, with winds especially strong over ridges and mountaintops, and where they accelerate downslope.”

This low is expected to produce large surf along exposed north- and west-facing shores, with a chance for significant coastal flooding.

“If you have outdoor plans for the weekend, be prepared for very windy conditions,” forecasters said. “If your plans include marine activities, you may want to consider postponing them.”

The weather service also issued a high surf advisory for eastern shores of all islands until 6 p.m. Thursday as a northeast swell approaches the state. Waves from 5 to 8 feet are expected.

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