Today: Mostly cloudy. Showers likely in the morning, then scattered showers in the afternoon. Highs around 81 near the shore to 66 to 71 at 4000 feet. Northeast winds up to 15 mph. Chance of rain 70 percent.
Tonight: Cloudy. Showers likely in the evening, then occasional showers after midnight. Lows 65 to 72 near the shore to around 54 at 4000 feet. Northwest winds up to 15 mph. Chance of rain 80 percent.
Saturday: Cloudy. Showers likely in the morning, then scattered showers in the afternoon. Highs around 81 near the shore to 66 to 71 at 4000 feet. Northeast winds up to 15 mph. Chance of rain 70 percent.
Kona
Today: Mostly sunny with isolated showers in the morning, then mostly cloudy with scattered showers in the afternoon. Highs 79 to 84 near the shore to around 66 near 5000 feet. West winds up to 10 mph. Chance of rain 40 percent.
Tonight: Mostly cloudy in the evening then becoming partly cloudy. Isolated showers. Lows around 71 near the shore to around 54 near 5000 feet. Light winds. Chance of rain 20 percent.
ARTICLE CONTINUES BELOW AD
ARTICLE CONTINUES BELOW AD
Saturday: Mostly sunny in the morning, then mostly cloudy with scattered showers in the afternoon. Highs 79 to 84 near the shore to around 66 near 5000 feet. West winds up to 10 mph. Chance of rain 40 percent.
Waimea
Today: Breezy. Partly sunny with scattered showers. Highs around 79 near the shore to 66 to 76 near 3000 feet. East winds 10 to 25 mph. Chance of rain 50 percent.
Tonight: Breezy. Mostly cloudy with scattered showers. Lows around 68 near the shore to 54 to 62 near 3000 feet. East winds up to 25 mph. Chance of rain 50 percent.
Saturday: Breezy. Mostly cloudy with scattered showers. Highs around 79 near the shore to 66 to 76 near 3000 feet. East winds up to 25 mph increasing to 10 to 25 mph in the afternoon. Chance of rain 50 percent.
Kohala
Today: Breezy. Partly sunny with scattered showers. Highs around 79 near the shore to 66 to 76 near 3000 feet. East winds 10 to 25 mph. Chance of rain 50 percent.
ARTICLE CONTINUES BELOW AD
Tonight: Breezy. Mostly cloudy with scattered showers. Lows around 68 near the shore to 54 to 62 near 3000 feet. East winds up to 25 mph. Chance of rain 50 percent.
Saturday: Breezy. Mostly cloudy with scattered showers. Highs around 79 near the shore to 66 to 76 near 3000 feet. East winds up to 25 mph increasing to 10 to 25 mph in the afternoon. Chance of rain 50 percent.
South Big Island
Today: Breezy. Mostly sunny in the morning, then partly sunny with isolated showers in the afternoon. Highs around 83 near the shore to around 70 near 5000 feet. East winds up to 25 mph. Chance of rain 20 percent.
Tonight: Partly cloudy. Breezy. Isolated showers in the evening. Lows around 71 near the shore to around 54 near 5000 feet. Northeast winds up to 20 mph increasing to 10 to 20 mph after midnight. Chance of rain 20 percent.
Saturday: Breezy. Mostly sunny in the morning, then partly sunny with isolated showers in the afternoon. Highs around 83 near the shore to around 70 near 5000 feet. East winds up to 25 mph. Chance of rain 20 percent.
Puna
ARTICLE CONTINUES BELOW AD
Today: Mostly cloudy. Showers likely in the morning, then scattered showers in the afternoon. Highs around 81 near the shore to 66 to 71 at 4000 feet. Northeast winds up to 15 mph. Chance of rain 70 percent.
Tonight: Cloudy. Showers likely in the evening, then occasional showers after midnight. Lows 65 to 72 near the shore to around 54 at 4000 feet. Northwest winds up to 15 mph. Chance of rain 80 percent.
Saturday: Cloudy. Showers likely in the morning, then scattered showers in the afternoon. Highs around 81 near the shore to 66 to 71 at 4000 feet. Northeast winds up to 15 mph. Chance of rain 70 percent.
Waikoloa
Today: Breezy. Sunny with isolated showers in the morning, then partly sunny in the afternoon. Highs around 83 near the shore to 67 to 73 above 4000 feet. East winds up to 15 mph shifting to the north in the afternoon. Gusts up to 40 mph. Chance of rain 20 percent.
Tonight: Partly cloudy. Breezy. Isolated showers in the evening. Lows around 71 near the shore to 49 to 59 above 4000 feet. Southeast winds up to 20 mph. Chance of rain 20 percent.
Saturday: Sunny in the morning then becoming partly sunny. Breezy. Highs around 83 near the shore to 67 to 73 above 4000 feet. Southeast winds up to 20 mph shifting to the northeast in the afternoon.
Detailed Forecast
Synopsis
Breezy easterly trade winds will continue through the weekend, with clouds and showers favoring windward and mauka locations overnight through the morning periods. A band of moisture and strong northeast winds associated with a cold front moving into the area could lead to a wet and windy pattern for the first half of next week.
Discussion
Guidance remains in good agreement and depicts a stable trade wind pattern continuing through the weekend as strong high pressure builds north of the state. Increasing moisture moving in (evident on the overnight Hilo sounding) from the east will support brief windward and mauka showers with light accumulations through the morning hours today. Expect this trend to continue into the weekend as pockets of moisture move through periodically. Trades will become locally windy as the pressure gradient tightens, which will near the advisory level for the windier locations in Maui County and the Big Island over the weekend.
The strong trades will continue early next week as a cold front approaches and moves into the area. Strong winds combined with increasing moisture accompanying the front will translate to more of a wet pattern unfolding Monday night through midweek. These winds will likely carry some showers into leeward areas, especially overnight through the morning periods.
Aviation
High pressure to the far north-northeast will maintain a low- level, locally breezy easterly flow across the islands into the weekend. Some thin high clouds are still passing over the islands from the west. Otherwise a stable atmosphere will remain in place through tonight, with limited showers focused over the windward slopes. VFR conditions are expected to prevail, with some pockets of MVFR in some of the clouds and showers.
AIRMET Tango remains in place for low level turbulence over and downwind of terrain on all islands and will likely remain posted for the next several days. Not anticipating the need for any other AIRMETS this morning.
Marine
The relatively tight pressure gradient south of a surface high pressure system centered almost 725 nm north-northeast of Honolulu will maintain gusty trade winds and elevated, rough seas through this afternoon. Therefore, a Small Craft Advisory (SCA) remains in effect for all Hawaiian waters today. The surface high will weaken slightly as a front pushes down from the north-northwest tonight, so the SCA will be scaled back to include the typically windier waters adjacent to the islands of Maui County and the Big Island starting this evening, and continuing through Saturday. The SCA for these waters will likely be extended through the remainder of the weekend due to a new surface high pressure system pushing down from the northwest to a position far north of the islands from late Saturday through Sunday. This surface high will eventually push a front down from the north toward the islands early next week. It is likely that SCA conditions will develop over additional waters due to strengthening trade winds and building seas as this front moves down into the vicinity of the islands late Monday or Tuesday.
The current small north-northwest swell is expected to maintain small surf along exposed north and west facing shores into this weekend. The forecast guidance continues to indicate that a new long-period north swell will likely begin to spread down over the area starting late Sunday night or early Monday morning. This swell will gradually build, and may cause surf to eventually reach the High Surf Advisory threshold along most north facing shores around the time it is forecast to peak on Tuesday. The locally strong trade winds in the vicinity of, as well as upstream of the islands will produce slightly elevated, rough surf along east facing shores through early next week. Small background surf along south facing shores is expected to continue to gradually lower into this weekend.
HFO Watches/Warnings/Advisories
Small Craft Advisory until 6 PM HST Saturday for Maalaea Bay, Pailolo Channel, Alenuihaha Channel, Big Island Leeward Waters, Big Island Southeast Waters.
Small Craft Advisory until 6 PM HST this evening for all waters.
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