Today: Partly sunny. Numerous showers in the morning, then scattered showers in the afternoon. Highs around 83 near the shore to around 72 at 4000 feet. Northeast winds up to 15 mph increasing to 10 to 15 mph in the afternoon. Chance of rain 70 percent.
Tonight: Mostly cloudy with numerous showers. Lows around 68 near the shore to around 54 at 4000 feet. North winds up to 15 mph. Chance of rain 70 percent.
Friday: Partly sunny. Numerous showers in the morning, then scattered showers in the afternoon. Highs around 83 near the shore to around 72 at 4000 feet. Northeast winds up to 15 mph increasing to 10 to 15 mph in the afternoon. Chance of rain 70 percent.
Kona
Today: Mostly sunny in the morning, then mostly cloudy with isolated showers in the afternoon. Highs 83 to 88 near the shore to around 70 near 5000 feet. South winds up to 10 mph shifting to the west in the afternoon. Chance of rain 20 percent.
Tonight: Mostly cloudy in the evening then becoming partly cloudy. Isolated showers. Lows 69 to 74 near the shore to around 55 near 5000 feet. Light winds. Chance of rain 20 percent.
ARTICLE CONTINUES BELOW AD
ARTICLE CONTINUES BELOW AD
Friday: Mostly sunny in the morning, then mostly cloudy with isolated showers in the afternoon. Highs 83 to 88 near the shore to around 70 near 5000 feet. West winds up to 10 mph. Chance of rain 20 percent.
Waimea
Today: Breezy. Mostly sunny with scattered showers. Highs around 82 near the shore to 70 to 80 near 3000 feet. East winds 10 to 25 mph. Chance of rain 50 percent.
Tonight: Partly cloudy in the evening then becoming mostly cloudy. Windy. Scattered showers. Lows around 68 near the shore to 56 to 62 near 3000 feet. East winds up to 30 mph. Chance of rain 50 percent.
Friday: Windy. Partly sunny with scattered showers. Highs around 82 near the shore to 70 to 80 near 3000 feet. East winds 10 to 30 mph. Chance of rain 50 percent.
Kohala
Today: Breezy. Mostly sunny with scattered showers. Highs around 82 near the shore to 70 to 80 near 3000 feet. East winds 10 to 25 mph. Chance of rain 50 percent.
ARTICLE CONTINUES BELOW AD
Tonight: Partly cloudy in the evening then becoming mostly cloudy. Windy. Scattered showers. Lows around 68 near the shore to 56 to 62 near 3000 feet. East winds up to 30 mph. Chance of rain 50 percent.
Friday: Windy. Partly sunny with scattered showers. Highs around 82 near the shore to 70 to 80 near 3000 feet. East winds 10 to 30 mph. Chance of rain 50 percent.
South Big Island
Today: Windy. Sunny in the morning, then partly sunny with isolated showers in the afternoon. Highs around 87 near the shore to around 74 near 5000 feet. East winds 10 to 30 mph. Chance of rain 20 percent.
Tonight: Windy. Mostly cloudy with isolated showers in the evening, then mostly clear after midnight. Lows around 70 near the shore to around 53 near 5000 feet. Northeast winds 10 to 30 mph. Chance of rain 20 percent.
Friday: Windy. Sunny in the morning, then partly sunny with isolated showers in the afternoon. Highs around 87 near the shore to around 74 near 5000 feet. East winds up to 30 mph increasing to 10 to 30 mph in the afternoon. Chance of rain 20 percent.
Puna
ARTICLE CONTINUES BELOW AD
Today: Partly sunny. Numerous showers in the morning, then scattered showers in the afternoon. Highs around 83 near the shore to around 72 at 4000 feet. Northeast winds up to 15 mph increasing to 10 to 15 mph in the afternoon. Chance of rain 70 percent.
Tonight: Mostly cloudy with numerous showers. Lows around 68 near the shore to around 54 at 4000 feet. North winds up to 15 mph. Chance of rain 70 percent.
Friday: Partly sunny. Numerous showers in the morning, then scattered showers in the afternoon. Highs around 83 near the shore to around 72 at 4000 feet. Northeast winds up to 15 mph increasing to 10 to 15 mph in the afternoon. Chance of rain 70 percent.
Waikoloa
Today: Mostly sunny. Windy. Isolated showers in the afternoon. Highs around 87 near the shore to 71 to 77 above 4000 feet. Northeast winds up to 30 mph. Chance of rain 20 percent.
Tonight: Breezy. Partly cloudy with isolated showers. Lows around 72 near the shore to 51 to 58 above 4000 feet. East winds up to 25 mph. Chance of rain 20 percent.
Friday: Breezy. Sunny in the morning, then partly sunny with isolated showers in the afternoon. Highs around 87 near the shore to 71 to 77 above 4000 feet. Northeast winds up to 25 mph. Chance of rain 20 percent.
Detailed Forecast
Synopsis
Trade winds will remain at breezy to locally windy levels through early next week, peaking over the weekend. The trades may ease back to moderate levels around the middle of next week. Little change in the overall weather pattern is expected during the next 7 days, with bands of clouds and showers moving through the islands at times. The showers will favor windward and mauka areas, particularly at night and during the early morning hours, with a few showers occasionally reaching leeward communities.
Discussion
Currently at the surface, a 1031 mb high is centered around 1150 miles north-northeast of Honolulu, and is driving moderate to breezy trade winds across the island chain early this morning. Infrared satellite imagery shows mostly cloudy conditions over windward slopes and coasts, with partly cloudy skies in most leeward areas. Radar imagery shows scattered to numerous showers moving into windward locales, with some of these showers reaching leeward areas as well. Main short term focus revolves around the increasing trades during the next few days.
High pressure north-northeast of the islands will shift southwest and closer to the state during the next couple days, strengthening the pressure gradient across the island chain. The trade winds will strengthen to breezy levels today, and remain breezy through early next week. A drier more stable airmass will lower inversion heights down to around 5-6 kft this weekend, and this should allow the terrain to be particularly effective at accelerating the winds through the islands, with locally windy conditions expected. The trades may ease back to moderate levels around the middle of next week as the high to the distant northeast weakens.
As for the remaining weather details, typical trade wind weather is expected to continue during the next 7 days, with the exception of this weekend when a drier more stable airmass should reduce shower coverage statewide. Overall, bands of clouds and showers will periodically move through the islands throughout the forecast period, with showers favoring windward slopes and coasts, particularly at night and during the early morning hours. A few showers will reach leeward areas at times as well.
Aviation
A cell of high pressure sitting stagnant northeast of the state will bring moderate to locally breezy east northeasterly trades across the islands through the forecast period. Expect scattered showers to affect the windward coasts and slopes with isolated over leeward locations. Brief periods of MVFR ceilings and visibility may accompany any of the more robust shower activity.
AIRMET Tango is in effect for low level turbulence over and downwind of the terrain of all islands. This AIRMET will likely remain in place through the remainder of today due to the breezy trade winds.
Marine
Fresh to strong trades will persist into next week as the surface ridge strengthens to the north. Seas will quickly respond and become rough over the exposed waters. As a result, the Small Craft Advisory is now in effect for all Hawaiian waters through Sunday.
Surf along east facing shores will trend up through the weekend due to the strong winds.
Surf along south facing shores will remain small through Friday with mainly background southerly swell energy moving through. An upward trend is expected Friday night through the weekend as a long-period south-southeast swell arrives and begins to move through. This swell will continue through the first half of next week, with surf hovering above the summertime average each day beginning late Saturday.
Surf along north and west facing shores will remain near the summertime average through Saturday, then slightly trend up Sunday into next week as a small northwest swell arrives.
HFO Watches/Warnings/Advisories
Small Craft Advisory until 6 PM HST Sunday for all Hawaiian waters,
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