Hilo

Tonight: Mostly cloudy with numerous showers. Lows 66 to 73 near the shore to 52 to 59 at 4000 feet. East winds up to 10 mph. Chance of rain 70 percent.

Friday: Partly sunny. Numerous showers in the morning, then scattered showers in the afternoon. Highs 81 to 88 near the shore to around 68 at 4000 feet. North winds up to 10 mph shifting to the east in the afternoon. Chance of rain 70 percent.

Friday Night: Mostly cloudy with scattered showers. Lows 66 to 72 near the shore to 52 to 59 at 4000 feet. East winds up to 15 mph shifting to the west after midnight. Chance of rain 50 percent.

Kona

Tonight: Mostly cloudy. Scattered showers in the evening, then isolated showers after midnight. Lows 72 to 77 near the shore to 50 to 55 near 5000 feet. Light winds. Chance of rain 40 percent.

Friday: Mostly sunny. Isolated showers in the afternoon. Highs around 87 near the shore to around 70 near 5000 feet. Light winds. Chance of rain 20 percent.

Friday Night: Mostly clear. Isolated showers in the evening. Lows 72 to 77 near the shore to 51 to 56 near 5000 feet. Light winds. Chance of rain 20 percent.

Waimea

Tonight: Breezy. Mostly cloudy with scattered showers in the evening, then partly cloudy with isolated showers after midnight. Lows 65 to 73 near the shore to 56 to 64 near 3000 feet. East winds up to 20 mph. Chance of rain 50 percent.

Friday: Mostly sunny. Breezy. Scattered showers in the morning, then isolated showers in the afternoon. Highs around 82 near the shore to 70 to 81 near 3000 feet. East winds up to 20 mph. Chance of rain 40 percent.

Friday Night: Mostly cloudy in the evening then becoming partly cloudy. Breezy. Scattered showers. Lows 65 to 73 near the shore to 56 to 64 near 3000 feet. East winds up to 20 mph. Chance of rain 40 percent.

Kohala

Tonight: Breezy. Mostly cloudy with scattered showers in the evening, then partly cloudy with isolated showers after midnight. Lows 65 to 73 near the shore to 56 to 64 near 3000 feet. East winds up to 20 mph. Chance of rain 50 percent.

Friday: Mostly sunny. Breezy. Scattered showers in the morning, then isolated showers in the afternoon. Highs around 82 near the shore to 70 to 81 near 3000 feet. East winds up to 20 mph. Chance of rain 40 percent.

Friday Night: Mostly cloudy in the evening then becoming partly cloudy. Breezy. Scattered showers. Lows 65 to 73 near the shore to 56 to 64 near 3000 feet. East winds up to 20 mph. Chance of rain 40 percent.

South Big Island

Tonight: Breezy. Mostly cloudy with scattered showers. Lows around 75 near the shore to around 56 near 5000 feet. East winds 10 to 25 mph. Chance of rain 40 percent.

Friday: Sunny and breezy. Isolated showers in the afternoon. Highs around 88 near the shore to around 69 near 5000 feet. East winds up to 25 mph. Chance of rain 20 percent.

Friday Night: Clear and breezy. Lows around 76 near the shore to around 55 near 5000 feet. East winds up to 25 mph.

Puna

Tonight: Mostly cloudy with numerous showers. Lows 66 to 73 near the shore to 52 to 59 at 4000 feet. East winds up to 10 mph. Chance of rain 70 percent.

Friday: Partly sunny. Numerous showers in the morning, then scattered showers in the afternoon. Highs 81 to 88 near the shore to around 68 at 4000 feet. North winds up to 10 mph shifting to the east in the afternoon. Chance of rain 70 percent.

Friday Night: Mostly cloudy with scattered showers. Lows 66 to 72 near the shore to 52 to 59 at 4000 feet. East winds up to 15 mph shifting to the west after midnight. Chance of rain 50 percent.

Waikoloa

Tonight: Mostly cloudy with isolated showers in the evening, then partly cloudy after midnight. Lows 73 to 78 near the shore to 52 to 57 above 4000 feet. Northwest winds up to 10 mph shifting to the east after midnight. Gusts up to 35 mph. Chance of rain 20 percent.

Friday: Sunny. Isolated showers in the afternoon. Highs around 88 near the shore to 67 to 75 above 4000 feet. Northeast winds up to 15 mph shifting to the northwest in the afternoon. Gusts up to 35 mph. Chance of rain 20 percent.

Friday Night: Clear. Lows around 75 near the shore to around 55 above 4000 feet. Northeast winds up to 15 mph.

Detailed Forecast

Synopsis

High pressure centered northeast of Hawaii will drive moderate to fresh trade winds into next week. An area of moisture will bring some windward showers overnight with a drying trend expected Friday to Monday.

Discussion

High pressure centered northeast of Hawaii will drive moderate to fresh trade winds into next week. Visible satellite and radar show the clouds and showers that tracked across windward Big Island this morning are becoming a bit more diffuse through the afternoon, but upstream moisture will continue to track in from upstream keeping showers in the forecast for tonight along windward portions of Maui and the Big Island. A few low clouds and showers linger across the rest of the state, but not amounting to much accumulation. Aloft, upper level troughing to the west is pushing in high clouds across the western half of the area and keeping a fairly weak and elevated inversion over the state.
Upper ridging will push in from the east, while the remnant low level moisture passes to the west. Expect a drying trend for Friday through the weekend and Monday. A tropical wave will pass south of the state Tuesday and Wednesday. Long range guidance shows some moisture along the far northern periphery of the wave getting caught in the trade wind flow and pushed across the island chain. Clouds and showers will likely increase during this time frame focusing over windward and mauka areas.

Aviation

Moderate to locally breezy trade winds will gradually and slightly increase tomorrow as high pressure to the northeast remains in place. Showers will favor windward and mountain areas as well as the night time and early morning hours. MVFR conditions can be expected in any showers but overall VFR conditions will prevail.
No AIRMETs are in effect. AIRMET Sierra for mountain obscuration over select windward areas is possible tonight. Also there is the potential for AIRMET Tango if wind speeds increase.

Marine

High pressure will build far northeast of the state and remain nearly stationary through this weekend. As the remnants of Post- Tropical Cyclone Kiko exit the region, gentle to locally fresh trade winds have returned to Hawaiian coastal waters. Trades are expected to strengthen slightly from tonight onward to become locally strong. Therefore, a Small Craft Advisory (SCA) has been issued for the typically windy channels and waters of Maui County and the Big Island. This SCA will remain in effect through at least the first half of the weekend.
Despite the current south swell slowly declining today, another small, medium to long period south swell will fill in on Friday to provide another slight bump in south shore surf. This swell will then then slowly decline over the weekend. Additionally, surf along north facing shores will remain slightly elevated over the next couple of days as another small northwest pulse arrives on Friday. East facing shores will see typical trade wind generated energy throughout the forecast period.

HFO Watches/Warnings/Advisories

Small Craft Advisory until 6 AM HST Sunday for Maalaea Bay, Pailolo Channel, Alenuihaha Channel, Big Island Leeward Waters, Big Island Southeast Waters.

Big Island Now Weather is brought to you by Blue Hawaiian Helicopters.

Check out their Big Island Helicopter Tours today!

Data Courtesy of NOAA.gov