Today: Partly sunny with scattered showers. Highs 74 to 80 near the shore to 60 to 65 at 4000 feet. Northeast winds up to 10 mph. Chance of rain 50 percent.
Tonight: Mostly cloudy with scattered showers. Lows 61 to 68 near the shore to around 54 at 4000 feet. North winds up to 10 mph. Chance of rain 50 percent.
Sunday: Partly sunny with scattered showers. Highs 75 to 81 near the shore to around 64 at 4000 feet. Northeast winds up to 15 mph. Chance of rain 50 percent.
Kona
Today: Sunny. Highs around 83 near the shore to 64 to 69 near 5000 feet. West winds up to 10 mph.
Tonight: Mostly clear. Lows around 71 near the shore to around 50 near 5000 feet. Light winds.
ARTICLE CONTINUES BELOW AD
ARTICLE CONTINUES BELOW AD
Sunday: Sunny. Isolated showers in the afternoon. Highs 80 to 85 near the shore to 65 to 70 near 5000 feet. Light winds. Chance of rain 20 percent.
Waimea
Today: Partly sunny with scattered showers. Highs around 75 near the shore to 63 to 74 near 3000 feet. East winds up to 15 mph. Chance of rain 50 percent.
Tonight: Mostly cloudy with scattered showers. Lows 60 to 68 near the shore to 52 to 59 near 3000 feet. East winds up to 15 mph. Chance of rain 50 percent.
Sunday: Partly sunny. Scattered showers in the morning, then numerous showers in the afternoon. Highs around 76 near the shore to 64 to 75 near 3000 feet. Northeast winds up to 15 mph. Chance of rain 70 percent.
Kohala
Today: Partly sunny with scattered showers. Highs around 75 near the shore to 63 to 74 near 3000 feet. East winds up to 15 mph. Chance of rain 50 percent.
ARTICLE CONTINUES BELOW AD
Tonight: Mostly cloudy with scattered showers. Lows 60 to 68 near the shore to 52 to 59 near 3000 feet. East winds up to 15 mph. Chance of rain 50 percent.
Sunday: Partly sunny. Scattered showers in the morning, then numerous showers in the afternoon. Highs around 76 near the shore to 64 to 75 near 3000 feet. Northeast winds up to 15 mph. Chance of rain 70 percent.
South Big Island
Today: Sunny and breezy. Highs around 81 near the shore to around 66 near 5000 feet. East winds up to 20 mph.
Tonight: Mostly clear. Lows around 70 near the shore to around 51 near 5000 feet. Northeast winds up to 15 mph.
Sunday: Sunny. Isolated showers in the afternoon. Highs around 82 near the shore to around 66 near 5000 feet. East winds up to 15 mph. Chance of rain 20 percent.
Puna
ARTICLE CONTINUES BELOW AD
Today: Partly sunny with scattered showers. Highs 74 to 80 near the shore to 60 to 65 at 4000 feet. Northeast winds up to 10 mph. Chance of rain 50 percent.
Tonight: Mostly cloudy with scattered showers. Lows 61 to 68 near the shore to around 54 at 4000 feet. North winds up to 10 mph. Chance of rain 50 percent.
Sunday: Partly sunny with scattered showers. Highs 75 to 81 near the shore to around 64 at 4000 feet. Northeast winds up to 15 mph. Chance of rain 50 percent.
Waikoloa
Today: Sunny. Highs 79 to 85 near the shore to 64 to 70 above 4000 feet. North winds up to 15 mph shifting to the west in the afternoon.
Tonight: Mostly clear. Lows around 71 near the shore to 49 to 54 above 4000 feet. Southeast winds up to 10 mph.
Sunday: Sunny. Highs 79 to 85 near the shore to 64 to 71 above 4000 feet. Northeast winds up to 15 mph.
Detailed Forecast
Synopsis
Moderate trade winds are forecast through the weekend with enhanced showers decreasing from west to east through this afternoon. Dry trade wind weather will continue on Sunday with wind speeds starting to pick up slightly by Sunday night as a high pressure system builds north of the islands. Brief periods of showers will pass through the islands through early next week in a moderate to breezy trade wind pattern. The middle of next week will be on the wet side for most islands, especially in the overnight to early morning hours, as a band of unstable clouds moves in from the northeast.
Discussion
Satellite imagery this morning shows a sharp upper trough moving into the northwest islands and a band of low clouds from an old frontal boundary at the surface level. This upper trough will help to enhance trade wind showers through the morning hours. An upper ridge will build in behind this trough as it passes from west to east across the state today, increasing stability and decreasing shower coverage. Sunday will be the most favorable weather day of the weekend for outdoor activities.
Strong winds aloft enhanced by this passing upper level trough will continue to support High Wind Warning conditions for the highest Big Island summits of Mauna Kea and Mauna Loa until this evening. Winds at summit level will decrease quickly by around Sunset as the upper trough passes east of the Big Island.
From Sunday night into Tuesday, a weak high pressure system will build just north of the Hawaiian islands. Fair weather remains in the forecast for most areas with a slight increase in our trade winds from moderate into the moderate to breezy range should be expected. One wrinkle in this forecast, no surprise to most locals, is the Hilo side of the Big Island and portions of East Maui will continue to see periods of enhanced showers.
From Tuesday night into Thursday morning, a band of unstable clouds will move from northeast to southwest across all islands. Expect increasing shower trends, favoring windward and mountain areas especially in the overnight to early morning hours. Rainfall coverage was increased for this time period in the morning forecast grid package.
From Thursday onward, typical trade wind weather will continue for the rest of the week with brief windward and mountain showers possible.
Aviation
Light to moderate trade winds will persist through forty-eight hours and beyond. Bands of low clouds and light showers off the Pacific will impact mainly windward slopes and coasts. Isolated spillover showers over leeward slopes of the smaller islands will taper off later this morning. Partial clearing expected over island interior's in the afternoon.
AIRMET Sierra for mountain obscuration is currently in effect for windward portions of all islands. Conditions are expected to improve towards noon.
Marine
High pressure building in from the north-northwest will drift east and keep trade winds moderate to fresh through the weekend. The ridge of high pressure should rebuild early next week, which should produce fresh to locally strong trade winds once again.
The current south swell will hold today than steadily decline Sunday. A series of small, medium period swells will persist through the weekend keeping south facing shores from going flat. Small, short- period north swell will continue into the weekend. A larger moderate medium period north swell reinforcement will arrive late tonight. A rise in surf overnight is expected but the north swell looks to peak Sunday well below High Surf Advisory levels. Surf along east facing shores will remain small but can expect a slight increase early next week as the trades strengthen.
HFO Watches/Warnings/Advisories
High Wind Warning until 6 PM HST this evening for Big Island Summits.
This comments section is a public community forum for the purpose of free expression. Although Big Island Now encourages respectful communication only, some content may be considered offensive. Please view at your own discretion. View Comments
