Today: Mostly cloudy. Breezy. Numerous showers early in the morning, then scattered showers in the late morning and afternoon. Highs around 78 near the shore to 62 to 67 at 4000 feet. North winds up to 15 mph shifting to the northeast in the afternoon. Chance of rain 70 percent.
Tonight: Mostly cloudy with numerous showers. Lows 62 to 67 near the shore to around 51 at 4000 feet. Northeast winds up to 15 mph. Chance of rain 70 percent.
Saturday: Partly sunny with scattered showers. Highs around 78 near the shore to 62 to 67 at 4000 feet. Northeast winds 10 to 15 mph shifting to the east in the afternoon. Chance of rain 50 percent.
Kona
Today: Mostly sunny early in the morning, then partly sunny with scattered showers in the late morning and afternoon. Highs around 80 near the shore to around 63 near 5000 feet. Southwest winds up to 10 mph. Chance of rain 40 percent.
Tonight: Partly cloudy. Lows 66 to 72 near the shore to around 52 near 5000 feet. Light winds becoming southeast up to 10 mph after midnight.
ARTICLE CONTINUES BELOW AD
ARTICLE CONTINUES BELOW AD
Saturday: Mostly sunny. Isolated showers in the afternoon. Highs around 80 near the shore to around 63 near 5000 feet. North winds up to 10 mph. Chance of rain 20 percent.
Waimea
Today: Windy. Partly sunny with scattered showers. Highs around 76 near the shore to 63 to 72 near 3000 feet. East winds 10 to 30 mph. Chance of rain 50 percent.
Tonight: Mostly cloudy in the evening then becoming partly cloudy. Breezy. Scattered showers. Lows around 64 near the shore to 52 to 59 near 3000 feet. East winds 10 to 25 mph. Chance of rain 50 percent.
Saturday: Breezy. Mostly sunny with scattered showers. Highs around 76 near the shore to 63 to 72 near 3000 feet. East winds 10 to 25 mph. Chance of rain 50 percent.
Kohala
Today: Windy. Partly sunny with scattered showers. Highs around 76 near the shore to 63 to 72 near 3000 feet. East winds 10 to 30 mph. Chance of rain 50 percent.
ARTICLE CONTINUES BELOW AD
Tonight: Mostly cloudy in the evening then becoming partly cloudy. Breezy. Scattered showers. Lows around 64 near the shore to 52 to 59 near 3000 feet. East winds 10 to 25 mph. Chance of rain 50 percent.
Saturday: Breezy. Mostly sunny with scattered showers. Highs around 76 near the shore to 63 to 72 near 3000 feet. East winds 10 to 25 mph. Chance of rain 50 percent.
South Big Island
Today: Mostly sunny. Breezy. Isolated showers in the late morning and afternoon. Highs around 81 near the shore to around 67 near 5000 feet. East winds up to 25 mph. Chance of rain 20 percent.
Tonight: Mostly clear. Breezy. Lows around 67 near the shore to around 51 near 5000 feet. East winds 10 to 25 mph.
Saturday: Sunny and breezy. Isolated showers in the afternoon. Highs around 81 near the shore to around 67 near 5000 feet. East winds 15 to 25 mph. Chance of rain 20 percent.
Puna
ARTICLE CONTINUES BELOW AD
Today: Mostly cloudy. Breezy. Numerous showers early in the morning, then scattered showers in the late morning and afternoon. Highs around 78 near the shore to 62 to 67 at 4000 feet. North winds up to 15 mph shifting to the northeast in the afternoon. Chance of rain 70 percent.
Tonight: Mostly cloudy with numerous showers. Lows 62 to 67 near the shore to around 51 at 4000 feet. Northeast winds up to 15 mph. Chance of rain 70 percent.
Saturday: Partly sunny with scattered showers. Highs around 78 near the shore to 62 to 67 at 4000 feet. Northeast winds 10 to 15 mph shifting to the east in the afternoon. Chance of rain 50 percent.
Waikoloa
Today: Mostly sunny in the morning then becoming partly sunny. Windy. Highs around 82 near the shore to 64 to 69 above 4000 feet. Northeast winds up to 30 mph.
Tonight: Mostly clear. Lows around 69 near the shore to 48 to 55 above 4000 feet. Northeast winds up to 15 mph.
Saturday: Sunny. Highs around 82 near the shore to 64 to 69 above 4000 feet. Northeast winds up to 10 mph.
Detailed Forecast
Synopsis
Breezy northeast trade winds will become more easterly this weekend through early next week. Drier air will fill in over the weekend, providing limited clouds and showers windward and mauka.
Discussion
Satellite loop shows a broad anticyclonic circulation across the central North Pacific this morning, marking a subtropical high. The main Hawaiian Islands lie within a belt of northeasterly trades along the southern flank of this circulation. Ragged bands of patchy broken low clouds keep skies covered across windward sections of Kauai and the Big Island, but the remaining islands lie beneath scattered low clouds to clear skies. Overnight soundings show a rather dry airmass, with PW ranging from 0.9 to 1.1 inches. Radar shows isolated to scattered light showers beneath cloud cover across windward portions of Kauai and the Big Island, with more showers noted across waters upwind from Oahu and Molokai, but very little activity elsewhere.
Models show stronger winds shifting southward over the state today as a band of moistures rides ahead. This will translate to a slight increase in clouds and showers for Kauai and Oahu later this morning and for the rest of the state through the course of today. Breezy northeast trade winds will veer more easterly this weekend as the high north of the state gradually strengthens and tracks eastward. Given the dryness of our airmass, any clouds and showers that form will be limited to windward and mauka areas. Models show increased moisture early next week as an area of high PW moves in from the south, raising values to around 1.5 inches across the state by Tuesday. Upper troughing over the state could increase shower coverage over windward areas, while breezy trade winds persist.
Aviation
Breezy northeast trade winds will persist, with clouds and showers favoring windward areas. The best windward shower coverage is initially expected over the Big Island and the western end of the state where a band of low-level moisture has settled southward into the area. Similar conditions are anticipated over Maui County later today through tonight as this band continues southward.
AIRMET TANGO remains in effect for low-level turbulence over and S thru W of mountains.
AIRMET SIERRA remains in effect for mountain obscuration due to MVFR CIGs/VSBYs in SHRA for windward Big Island, Kauai, and Oahu.
Marine
Surface high pressure north of the state will gradually strengthen and drift east through the weekend. This will result in nearshore winds increasing to Small Craft Advisory (SCA) magnitudes across more area waters this weekend. Trades have already reached SCA levels across the typically windier waters around Maui County and south of Big Island. A SCA remains in effect for these windier waters. There is a high likelihood of adding more coastal zones to the advisory this evening or Saturday morning in response to strong trades spreading westward over more nearshore waters.
The ongoing near three foot, medium period northwest (310 degree) swell will flatten out today. A reinforcing small to moderate size, long period northwest (310 degree) swell is forecast to arrive through the day Saturday. Another slightly larger northwest swell will be on this weekend swell's heels and pass through Sunday night through Monday. This early week swell will likely result in High Surf Advisory surf heights along the better-exposed smaller island north and west-facing shores. Short period easterly wind wave swell will pick up going into the weekend as trade winds pick back up. South-facing shore surf will remain at very low background levels the next several days.
HFO Watches/Warnings/Advisories
Small Craft Advisory until 6 PM HST this evening for Maalaea Bay, Pailolo Channel, Alenuihaha Channel, Big Island Leeward Waters, Big Island Southeast Waters.
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