Hilo

Tonight: Mostly cloudy in the evening then becoming partly cloudy. Scattered showers. Lows 60 to 66 near the shore to 46 to 54 at 4000 feet. Southeast winds up to 10 mph shifting to the north after midnight. Chance of rain 40 percent.

Friday: Mostly sunny with isolated showers. Highs 77 to 82 near the shore to 64 to 70 at 4000 feet. East winds up to 10 mph. Chance of rain 20 percent.

Friday Night: Haze in the evening. Partly cloudy with scattered showers. Lows 60 to 67 near the shore to 47 to 55 at 4000 feet. Light winds. Chance of rain 40 percent.

Kona

Tonight: Partly cloudy. Isolated showers in the evening. Haze through the night. Lows around 68 near the shore to 42 to 49 near 5000 feet. Light winds. Chance of rain 20 percent.

Friday: Mostly sunny. Haze through the day. Isolated showers in the afternoon. Highs around 83 near the shore to around 66 near 5000 feet. Light winds. Chance of rain 20 percent.

Friday Night: Mostly clear. Haze in the evening. Lows around 69 near the shore to 42 to 50 near 5000 feet. Light winds.

Waimea

Tonight: Partly cloudy with isolated showers. Lows 59 to 68 near the shore to 50 to 57 near 3000 feet. East winds 10 to 15 mph. Chance of rain 20 percent.

Friday: Mostly sunny with isolated showers. Highs around 78 near the shore to 69 to 75 near 3000 feet. East winds up to 15 mph. Chance of rain 20 percent.

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

Kohala

Tonight: Partly cloudy with isolated showers. Lows 59 to 68 near the shore to 50 to 57 near 3000 feet. East winds 10 to 15 mph. Chance of rain 20 percent.

Friday: Mostly sunny with isolated showers. Highs around 78 near the shore to 69 to 75 near 3000 feet. East winds up to 15 mph. Chance of rain 20 percent.

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

South Big Island

Tonight: Mostly clear. Isolated showers in the evening. Haze through the night. Lows around 70 near the shore to around 48 near 5000 feet. Northeast winds 10 to 15 mph. Chance of rain 20 percent.

Friday: Sunny. Haze through the day. Isolated showers in the afternoon. Highs around 83 near the shore to around 66 near 5000 feet. East winds 10 to 15 mph. Chance of rain 20 percent.

Friday Night: Mostly clear. Haze. Lows around 70 near the shore to around 49 near 5000 feet. East winds 10 to 15 mph.

Puna

Tonight: Mostly cloudy in the evening then becoming partly cloudy. Scattered showers. Lows 60 to 66 near the shore to 46 to 54 at 4000 feet. Southeast winds up to 10 mph shifting to the north after midnight. Chance of rain 40 percent.

Friday: Mostly sunny with isolated showers. Highs 77 to 82 near the shore to 64 to 70 at 4000 feet. East winds up to 10 mph. Chance of rain 20 percent.

Friday Night: Haze in the evening. Partly cloudy with scattered showers. Lows 60 to 67 near the shore to 47 to 55 at 4000 feet. Light winds. Chance of rain 40 percent.

Waikoloa

Tonight: Mostly clear. Lows 66 to 71 near the shore to 45 to 51 above 4000 feet. Light winds.

Friday: Sunny. Haze in the afternoon. Highs around 83 near the shore to 63 to 70 above 4000 feet. Light winds.

Friday Night: Mostly clear. Haze in the evening. Lows 66 to 72 near the shore to 47 to 52 above 4000 feet. Light winds.

Detailed Forecast

Synopsis

Light winds and dry conditions prevail for the next several days bringing a prolonged stretch of benign weather. Haze is possible for a few days due to vog emissions from Halema'uma'u. A front will approach from the northwest late next week bringing a chance of showers to the region.

Discussion

A strong Pacific jet remains across the north central Pacific. This will maintain expansive ridging to its south with a surface ridge axis just north of Kauai. Meanwhile, the trade wind belt remains suppressed south of the state. This pattern supports moderate east-southeast trade winds over the eastern end of the state, with lighter winds elsewhere. Local afternoon sea breezes and overnight land breezes will be common, especially in sheltered areas. Active mid- level subsidence, light winds, and no apparent upstream moisture source favor dry and benign weather for the next several days. The biggest impact in the short-term remains the potential for haze due to vog emissions from Halema'uma'u. Guidance then shows a front approaching from the northwest late next week which looks to bring a chance of showers to mainly Kauai and Oahu.

Aviation

A surface ridge north of the islands will support light SE winds over Kauai and Oahu, and light to moderate E winds over Maui and Hawaii Counties. A strengthening ridge aloft will lead to increasing stability, with limited precipitation falling from stable low clouds with tops at 8000 feet or lower. ISOL MVFR CIG can be expected windward, and no AIRMETs are anticipated.

Marine

A ridge north of Hawaii will drive moderate east southeast winds through tonight before a weakening trade winds form Friday into next week as the ridge moves closer to the state.
A west northwest swell will decline tonight pushing surf below the advisory threshold for north and west facing shores. Therefore, the High Surf Advisory is cancelled for north and west facing shores of Niihau, Kauai, Oahu, Molokai and west facing shores of the Big Island. Another northwest swell is due late Saturday into early next week with peak surf heights likely reaching warning levels along north and west facing shores. Yet another similar sized northwest swell is due in late Tuesday.
Small surf is expected along east facing shores over the next week as trade winds remain light. Surf along south facing shores should see a small boost as a small south swell fills in through the end of the week.

HFO Watches/Warnings/Advisories

None.

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Data Courtesy of NOAA.gov