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Weather system likely to bring windy conditions to marathon

    A cold front approaching the islands from the northwest is forecast to move over Oahu Saturday night or early Sunday morning.

National Weather Service forecasters are watching an approaching cold front that could bring windy weather and some showers to the Honolulu Marathon Sunday morning.

"Sunday is going to be quite windy during the day," said Robert Ballard, a meteorologist with the National Weather Service Honolulu office.

The forecast calls for the front to move over Oahu late Saturday night or early Sunday morning.

But the timing could change, Ballard said.

"It doesn’t look like a strong front. We wouldn’t expect a lot of shower activity with it, but there will probably be some clouds and showers. It doesn’t look like anything super heavy," he said.

The forecast for south shores of Oahu Saturday night and Sunday calls for breezy conditions, with the chance of gusts to 45 mph in the late morning and afternoon.  Lows between 66 and 71 and highs of 78 to 83 are expected. 

Another weak cold front that moved over Oahu Wednesday night, stalled over the Maui and the Big Island Thursday and could continue to bring rain to the eastern end of the state through Friday morning.

On Oahu, forecasters expect tradewinds to pick up Thursday afternoon and then weaken Friday morning as the front approaches. Moderate tradewinds should return Saturday and strengthen Sunday.

A big swell on north and west shores of most islands is declining and an earlier high surf warning was changed to an advisory Thursday afternoon.

Thursday morning’s surf of 20 to 25 feet on north shores was still too rough to hold the Billabong Pipe Masters.

"The swell is too big and still out of the north in the 8- to 12-foot range (at Ehukai Beach), so when the big sets come they’re just washing though and just pushing a lot of water around on the reef and it’s not great at all," said Kieren Perrow, Association of Surfing Professionals commissioner. "We’ll come back tomorrow when we’re expecting things to clean up and we’re looking at a pretty good day."

Another near-warning level swell is expected to arrive Friday night and peak Saturday night.

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