Hilo

Tonight: Mostly cloudy. Scattered showers in the evening, then numerous showers after midnight. Lows 56 to 67 near the shore to 49 to 55 at 4000 feet. North winds up to 15 mph. Chance of rain 70 percent.

Friday: Partly sunny with scattered showers in the morning, then mostly sunny with isolated showers in the afternoon. Highs 74 to 79 near the shore to 59 to 64 at 4000 feet. North winds up to 15 mph. Chance of rain 50 percent.

Friday Night: Mostly cloudy with scattered showers. Lows 56 to 66 near the shore to 48 to 54 at 4000 feet. North winds up to 10 mph. Chance of rain 50 percent.

Kona

Tonight: Mostly clear. Scattered showers in the evening, then isolated showers after midnight. Lows around 69 near the shore to around 49 near 5000 feet. Light winds. Chance of rain 50 percent.

Friday: Sunny. Isolated showers in the afternoon. Highs 78 to 83 near the shore to around 63 near 5000 feet. West winds up to 10 mph. Chance of rain 20 percent.

Friday Night: Partly cloudy in the evening then becoming mostly cloudy. Lows around 69 near the shore to 45 to 51 near 5000 feet. Light winds.

Waimea

Tonight: Partly cloudy with scattered showers. Lows 57 to 67 near the shore to 51 to 58 near 3000 feet. East winds up to 15 mph. Chance of rain 50 percent.

Friday: Mostly sunny. Scattered showers in the morning, then isolated showers in the afternoon. Highs 72 to 77 near the shore to 64 to 73 near 3000 feet. East winds up to 15 mph. Chance of rain 50 percent.

Friday Night: Mostly cloudy with scattered showers. Lows 57 to 67 near the shore to 51 to 58 near 3000 feet. East winds up to 15 mph. Chance of rain 50 percent.

Kohala

Tonight: Partly cloudy with scattered showers. Lows 57 to 67 near the shore to 51 to 58 near 3000 feet. East winds up to 15 mph. Chance of rain 50 percent.

Friday: Mostly sunny. Scattered showers in the morning, then isolated showers in the afternoon. Highs 72 to 77 near the shore to 64 to 73 near 3000 feet. East winds up to 15 mph. Chance of rain 50 percent.

Friday Night: Mostly cloudy with scattered showers. Lows 57 to 67 near the shore to 51 to 58 near 3000 feet. East winds up to 15 mph. Chance of rain 50 percent.

South Big Island

Tonight: Mostly clear. Isolated showers in the evening. Lows around 72 near the shore to around 53 near 5000 feet. East winds up to 10 mph. Chance of rain 20 percent.

Friday: Sunny. Isolated showers in the afternoon. Highs around 81 near the shore to around 62 near 5000 feet. East winds up to 15 mph. Chance of rain 20 percent.

Friday Night: Mostly cloudy. Lows around 71 near the shore to around 52 near 5000 feet. East winds up to 15 mph.

Puna

Tonight: Mostly cloudy. Scattered showers in the evening, then numerous showers after midnight. Lows 56 to 67 near the shore to 49 to 55 at 4000 feet. North winds up to 15 mph. Chance of rain 70 percent.

Friday: Partly sunny with scattered showers in the morning, then mostly sunny with isolated showers in the afternoon. Highs 74 to 79 near the shore to 59 to 64 at 4000 feet. North winds up to 15 mph. Chance of rain 50 percent.

Friday Night: Mostly cloudy with scattered showers. Lows 56 to 66 near the shore to 48 to 54 at 4000 feet. North winds up to 10 mph. Chance of rain 50 percent.

Waikoloa

Tonight: Mostly clear. Breezy. Lows around 69 near the shore to 47 to 53 above 4000 feet. East winds up to 20 mph.

Friday: Sunny. Isolated showers in the afternoon. Highs 78 to 83 near the shore to 62 to 67 above 4000 feet. North winds up to 15 mph. Chance of rain 20 percent.

Friday Night: Partly cloudy. Breezy. Lows around 69 near the shore to 47 to 52 above 4000 feet. East winds up to 20 mph.

Detailed Forecast

Synopsis

A drier and more stable trade wind pattern is expected into at least the middle of next week. Showers should be mostly focused along windward and mauka locations through the period. Nights will be cool in sheltered areas this weekend.

Discussion

Light trade wind showers were detected by radar this morning along windward and mauka areas. Satellite shows typical clouds expected for a trade wind pattern. Winds will continue to ease today before picking back up slightly through the weekend as a weak front moves through. This front will bring another shot of dry air to the region. Lowering dewpoints through Monday should allow for cool nights in most areas. Another plus from the dry air will be enhanced evaporation, helping to eliminate standing water from the recent flooding and perhaps aid in cleanup.

Aviation

Mostly dry and stable conditions with moderate northeast trade winds will prevail across the island chain over the next 24 h. Brief periods with MVFR CIGS/VSBYS are possible in passing showers, mainly for windward sites.

Marine

A low pressure system northeast of the islands and a high pressure system to the far northwest of the Hawaii region will keep northeasterly trade winds in the forecast through the week. Wind speeds will briefly ease through Friday, and the Small Craft Advisory was cancelled this morning. Fresh to strong trade winds bring a return of SCA conditions from Saturday into the first half of next week as high pressure builds north of the state.
A medium period swell will peak around 3 feet today before gradually declining through the weekend. For east facing shores, short period wind wave energy from northeasterly trade winds will hold into the weekend. Strengthening northeasterly winds this weekend and a swath of gales associated with a low around one thousand miles northeast of the islands will lead to the potential for high surf advisories along north and east facing shores from Sunday into early next week.
For south facing shores, small background energy pulses will keep surf heights above flat conditions into early next week.

HFO Watches/Warnings/Advisories

None.

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Data Courtesy of NOAA.gov