Hilo

Tonight: Mostly cloudy with numerous showers. Lows 58 to 67 near the shore to 48 to 54 at 4000 feet. Light winds becoming southwest up to 10 mph after midnight. Chance of rain 70 percent.

Thursday: Mostly cloudy. Numerous showers in the morning, then scattered showers in the afternoon. Highs 76 to 81 near the shore to 61 to 67 at 4000 feet. Southwest winds up to 10 mph shifting to the southeast in the afternoon. Chance of rain 70 percent.

Thursday Night: Mostly cloudy with isolated showers. Lows 58 to 67 near the shore to 48 to 54 at 4000 feet. Light winds. Chance of rain 20 percent.

Kona

Tonight: Mostly cloudy. Lows around 69 near the shore to 44 to 50 near 5000 feet. Light winds.

Thursday: Mostly cloudy. Scattered showers in the afternoon. Highs around 82 near the shore to around 64 near 5000 feet. Northeast winds up to 10 mph shifting to the west in the afternoon. Chance of rain 40 percent.

Thursday Night: Mostly cloudy. Lows 67 to 72 near the shore to 44 to 50 near 5000 feet. Light winds.

Waimea

Tonight: Mostly cloudy with scattered showers. Lows 59 to 68 near the shore to 51 to 59 near 3000 feet. Light winds. Chance of rain 50 percent.

Thursday: Mostly cloudy with scattered showers. Highs around 77 near the shore to 66 to 73 near 3000 feet. Light winds becoming north up to 10 mph in the afternoon. Chance of rain 50 percent.

Thursday Night: Mostly cloudy with isolated showers. Lows 58 to 68 near the shore to 51 to 59 near 3000 feet. East winds up to 10 mph. Chance of rain 20 percent.

Kohala

Tonight: Mostly cloudy with scattered showers. Lows 59 to 68 near the shore to 51 to 59 near 3000 feet. Light winds. Chance of rain 50 percent.

Thursday: Mostly cloudy with scattered showers. Highs around 77 near the shore to 66 to 73 near 3000 feet. Light winds becoming north up to 10 mph in the afternoon. Chance of rain 50 percent.

Thursday Night: Mostly cloudy with isolated showers. Lows 58 to 68 near the shore to 51 to 59 near 3000 feet. East winds up to 10 mph. Chance of rain 20 percent.

South Big Island

Tonight: Mostly cloudy with isolated showers. Lows around 71 near the shore to around 51 near 5000 feet. Northeast winds up to 15 mph. Chance of rain 20 percent.

Thursday: Mostly cloudy with isolated showers. Highs around 82 near the shore to around 63 near 5000 feet. East winds up to 15 mph. Chance of rain 20 percent.

Thursday Night: Mostly cloudy. Lows around 71 near the shore to around 51 near 5000 feet. East winds 10 to 15 mph.

Puna

Tonight: Mostly cloudy with numerous showers. Lows 58 to 67 near the shore to 48 to 54 at 4000 feet. Light winds becoming southwest up to 10 mph after midnight. Chance of rain 70 percent.

Thursday: Mostly cloudy. Numerous showers in the morning, then scattered showers in the afternoon. Highs 76 to 81 near the shore to 61 to 67 at 4000 feet. Southwest winds up to 10 mph shifting to the southeast in the afternoon. Chance of rain 70 percent.

Thursday Night: Mostly cloudy with isolated showers. Lows 58 to 67 near the shore to 48 to 54 at 4000 feet. Light winds. Chance of rain 20 percent.

Waikoloa

Tonight: Mostly cloudy. Lows 67 to 73 near the shore to 46 to 52 above 4000 feet. Light winds.

Thursday: Mostly cloudy. Isolated showers in the afternoon. Highs around 81 near the shore to 62 to 67 above 4000 feet. Southeast winds up to 10 mph shifting to the northwest in the afternoon. Chance of rain 20 percent.

Thursday Night: Mostly cloudy. Lows 67 to 72 near the shore to 47 to 52 above 4000 feet. Light winds becoming east around 10 mph after midnight.

Detailed Forecast

Update

Winds were increased around the channels and waters around Maui County to better match current observations, resulting in a short-fuse small craft advisory persisting through 6 AM tomorrow morning. Winds will be re-evaluated with the morning package, but overall trends indicate local winds will be decreasing leading into the overnight hours.

Synopsis

A stationary front will remain parked over Maui County through Thursday. This feature is expected to bring periods to showery weather to mainly Maui County and to a lesser extent windward portions of the Big Island and Oahu. More unsettled weather is possible Friday through the weekend for the western islands as a plume of deep moisture develops ahead of another approaching front. Drier weather and improving conditions are forecast by Tuesday as ridging builds across the region.

Aviation

Scattered showers over portions of the area will persist into the overnight with increasing coverage across windward areas. The weakening front will keep chances for MVFR to IFR conditions on Maui, Lanai, and Molokai with isolated thunderstorms possible Thursday morning.
AIRMET Sierra remains in effect for mountain obscuration for Maui, Lanai, and Molokai.
AIRMET Tango remains in effect.

Marine

Strong post-frontal NE winds have weakened considerably this afternoon, giving way to moderate NE winds along and behind the front and gentle to moderate E to SE winds ahead of the front around the Big Island. Gentle to moderate trades hold into Friday night. Winds then veer to southerly over the weekend as a front approaches the western waters. A disturbance aloft could trigger a few heavier showers and possibly thunderstorms during this time.
New medium period NW (310) swell has arrived at the Hanalei PacIOOS Buoy this afternoon and and will continue building into area waters tonight. This swell will quickly peak just shy of the High Surf Advisory threshold tonight and fade during Thursday. Overlapping this swell will be a smaller NNW (340) swell that is forecast to arrive early Thursday peaking Thursday night into early Friday. A sharp downward trend for N shore surf is anticipated during the weekend followed by a large NW swell late Monday night and Tuesday. E shore surf remains below the seasonal average through the week. Surf along S shores remains very small through the period.

Prev discussion

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.HFO WATCHES/WARNINGS/ADVISORIES… Small Craft Advisory until 6 AM HST Thursday for Maui County Leeward Waters-Maalaea Bay-Pailolo Channel-Alenuihaha Channel- Big Island Leeward Waters.

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Data Courtesy of NOAA.gov