Hilo

Today: Partly sunny. Scattered showers in the morning, then isolated showers in the afternoon. Highs around 84 near the shore to 68 to 73 at 4000 feet. East winds up to 10 mph. Chance of rain 40 percent.

Tonight: Partly cloudy with isolated showers. Lows around 66 near the shore to around 54 at 4000 feet. Light winds becoming west up to 10 mph after midnight. Chance of rain 20 percent.

Friday: Mostly sunny in the morning then becoming partly sunny. Isolated showers. Highs around 84 near the shore to 68 to 73 at 4000 feet. East winds up to 10 mph. Chance of rain 20 percent.

Kona

Today: Mostly sunny in the morning, then mostly cloudy with isolated showers in the afternoon. Highs 80 to 85 near the shore to around 68 near 5000 feet. Light winds. Chance of rain 20 percent.

Tonight: Mostly cloudy in the evening then becoming mostly clear. Isolated showers. Lows 71 to 76 near the shore to around 55 near 5000 feet. Light winds. Chance of rain 20 percent.

Friday: Sunny in the morning then becoming mostly cloudy. Isolated showers. Highs 80 to 85 near the shore to around 68 near 5000 feet. Light winds becoming west up to 10 mph in the afternoon. Chance of rain 20 percent.

Waimea

Today: Partly sunny. Scattered showers in the morning, then isolated showers in the afternoon. Highs around 82 near the shore to 69 to 79 near 3000 feet. East winds up to 15 mph. Chance of rain 40 percent.

Tonight: Partly cloudy with isolated showers. Lows around 66 near the shore to 54 to 62 near 3000 feet. East winds up to 15 mph. Chance of rain 20 percent.

Friday: Mostly sunny in the morning then becoming partly sunny. Breezy. Isolated showers. Highs around 82 near the shore to 69 to 79 near 3000 feet. East winds up to 20 mph. Chance of rain 20 percent.

Kohala

Today: Partly sunny. Scattered showers in the morning, then isolated showers in the afternoon. Highs around 82 near the shore to 69 to 79 near 3000 feet. East winds up to 15 mph. Chance of rain 40 percent.

Tonight: Partly cloudy with isolated showers. Lows around 66 near the shore to 54 to 62 near 3000 feet. East winds up to 15 mph. Chance of rain 20 percent.

Friday: Mostly sunny in the morning then becoming partly sunny. Breezy. Isolated showers. Highs around 82 near the shore to 69 to 79 near 3000 feet. East winds up to 20 mph. Chance of rain 20 percent.

South Big Island

Today: Sunny in the morning then becoming partly sunny. Highs around 85 near the shore to around 72 near 5000 feet. East winds up to 15 mph.

Tonight: Partly cloudy. Lows 68 to 75 near the shore to around 53 near 5000 feet. Northeast winds up to 15 mph.

Friday: Sunny in the morning then becoming partly sunny. Breezy. Highs around 85 near the shore to around 72 near 5000 feet. East winds up to 20 mph.

Puna

Today: Partly sunny. Scattered showers in the morning, then isolated showers in the afternoon. Highs around 84 near the shore to 68 to 73 at 4000 feet. East winds up to 10 mph. Chance of rain 40 percent.

Tonight: Partly cloudy with isolated showers. Lows around 66 near the shore to around 54 at 4000 feet. Light winds becoming west up to 10 mph after midnight. Chance of rain 20 percent.

Friday: Mostly sunny in the morning then becoming partly sunny. Isolated showers. Highs around 84 near the shore to 68 to 73 at 4000 feet. East winds up to 10 mph. Chance of rain 20 percent.

Waikoloa

Today: Sunny with isolated showers in the morning, then partly sunny in the afternoon. Highs around 85 near the shore to 69 to 75 above 4000 feet. Southeast winds up to 10 mph shifting to the northwest in the afternoon. Chance of rain 20 percent.

Tonight: Mostly clear. Lows around 74 near the shore to 51 to 58 above 4000 feet. Light winds becoming southeast up to 10 mph after midnight.

Friday: Sunny in the morning then becoming partly sunny. Highs around 85 near the shore to 69 to 75 above 4000 feet. North winds up to 15 mph.

Detailed Forecast

Synopsis

Dry and pleasant conditions with light to moderate easterly trade winds will continue through Friday. The best chance for light showers will be overnight through the early morning hours over windward areas. Although leeward cloud coverage may increase through the afternoon hours where localized sea breezes form, rainfall chances will remain limited. A return of breezy trade wind conditions is expected this weekend through early next week.

Discussion

Light to moderate trades will hold into Friday, then trend up over the weekend as the ridge strengthens to the north. Limited moisture combined with a strong subsidence inversion around 5000 to 6000 ft supports the stable conditions persisting each day. This suppressed environment will limit rainfall chances, even with a weak mid- to upper-level trough moving through from east to west Thursday through Friday. Despite some afternoon cloud development over our leeward areas where sea breezes form, very little to no rainfall is anticipated. Windward shower coverage may trend up over the weekend through early next week as breezy trades return.

Aviation

A ridge just north of the main Hawaiian Islands will drive moderate trade flow across the area through Friday. Clouds and showers will favor windward areas, especially during the night and early morning, though dry and stable conditions will keep rainfall amounts light. Expect TAF sites to remain VFR, despite some leeward cloud cover across protected leeward areas during the afternoons.
No AIRMETs are currently in effect, with none anticipated through Thursday night.

Marine

A weak surface ridge just N of the islands will support light to moderate E to ESE winds into Friday. The ridge will strengthen and move N Friday night and Saturday, with E winds increasing to moderate to locally strong speeds. A Small Craft Advisory for winds will likely be needed for the windier zones around Maui County and the Big Island over the weekend, and may need to include additional zones.
No significant swells are expected. A small short-period NW swell will slowly fade the next day or two. Another small NW swell is expected Sunday and Monday. Little in the way of S swell is expected for at least the next several days. Small surf along E facing shores will get a little larger over the weekend as trade winds strengthen.

HFO Watches/Warnings/Advisories

None.

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Data Courtesy of NOAA.gov