Today: Partly sunny with scattered showers in the morning, then cloudy with isolated showers in the afternoon. Highs around 79 near the shore to around 67 at 4000 feet. East winds up to 15 mph. Chance of rain 50 percent.
Tonight: Cloudy with scattered showers. Lows 62 to 70 near the shore to around 54 at 4000 feet. Northwest winds up to 15 mph. Chance of rain 50 percent.
Monday: Cloudy. Scattered showers in the morning, then isolated showers in the afternoon. Highs around 80 near the shore to 65 to 71 at 4000 feet. East winds up to 15 mph. Chance of rain 50 percent.
Kona
Today: Mostly cloudy with isolated showers. Highs around 83 near the shore to around 67 near 5000 feet. Light winds becoming west up to 10 mph in the afternoon. Chance of rain 20 percent.
Tonight: Partly cloudy with isolated showers. Lows around 71 near the shore to 49 to 54 near 5000 feet. Light winds. Chance of rain 20 percent.
ARTICLE CONTINUES BELOW AD
ARTICLE CONTINUES BELOW AD
Monday: Mostly sunny in the morning then becoming partly sunny. Isolated showers. Highs 80 to 85 near the shore to around 67 near 5000 feet. Light winds. Chance of rain 20 percent.
Waimea
Today: Mostly sunny in the morning then becoming partly sunny. Breezy. Isolated showers. Highs 66 to 85. East winds 10 to 25 mph. Chance of rain 20 percent.
Tonight: Breezy. Mostly cloudy with isolated showers. Lows around 64 near the shore to 53 to 61 near 3000 feet. East winds up to 25 mph. Chance of rain 20 percent.
Monday: Breezy. Mostly cloudy with isolated showers. Highs 66 to 85. East winds up to 25 mph increasing to 10 to 25 mph in the afternoon. Chance of rain 20 percent.
Kohala
Today: Mostly sunny in the morning then becoming partly sunny. Breezy. Isolated showers. Highs 66 to 85. East winds 10 to 25 mph. Chance of rain 20 percent.
ARTICLE CONTINUES BELOW AD
Tonight: Breezy. Mostly cloudy with isolated showers. Lows around 64 near the shore to 53 to 61 near 3000 feet. East winds up to 25 mph. Chance of rain 20 percent.
Monday: Breezy. Mostly cloudy with isolated showers. Highs 66 to 85. East winds up to 25 mph increasing to 10 to 25 mph in the afternoon. Chance of rain 20 percent.
South Big Island
Today: Mostly sunny in the morning then becoming partly sunny. Breezy. Highs around 81 near the shore to around 65 near 5000 feet. East winds up to 25 mph.
Tonight: Partly cloudy. Breezy. Lows around 70 near the shore to around 51 near 5000 feet. Northeast winds up to 20 mph.
Monday: Mostly sunny in the morning then becoming partly sunny. Breezy. Highs around 82 near the shore to around 65 near 5000 feet. East winds up to 25 mph.
Puna
ARTICLE CONTINUES BELOW AD
Today: Partly sunny with scattered showers in the morning, then cloudy with isolated showers in the afternoon. Highs around 79 near the shore to around 67 at 4000 feet. East winds up to 15 mph. Chance of rain 50 percent.
Tonight: Cloudy with scattered showers. Lows 62 to 70 near the shore to around 54 at 4000 feet. Northwest winds up to 15 mph. Chance of rain 50 percent.
Monday: Cloudy. Scattered showers in the morning, then isolated showers in the afternoon. Highs around 80 near the shore to 65 to 71 at 4000 feet. East winds up to 15 mph. Chance of rain 50 percent.
Waikoloa
Today: Mostly sunny in the morning then becoming partly sunny. Breezy. Highs 78 to 86 near the shore to 64 to 72 above 4000 feet. North winds up to 20 mph.
Tonight: Partly cloudy. Breezy. Lows 66 to 73 near the shore to 49 to 55 above 4000 feet. Southeast winds up to 20 mph.
Monday: Sunny in the morning then becoming partly sunny. Breezy. Highs 79 to 87 near the shore to 64 to 72 above 4000 feet. Northeast winds up to 20 mph.
Detailed Forecast
Synopsis
Strong high pressure northeast of the islands and increasing stability will keep windy and rather dry trade wind weather around for the next few days. Scant showers will favor windward and mauka areas, with only light total rainfall expected. The strong winds may blow a few showers across leeward areas from time to time as well. Shower coverage may increase slightly late Monday and Tuesday as remnants of an old front pass through from the northeast.
Discussion
Strong trades continue as the islands feel the squeeze between strong 1035mb high pressure centered near 35N and a well-defined surface trough south of the Big Island. The increase in the local pressure gradient has also been accompanied by the rapid development of a strong and shallow inversion that slopes from around 4kft at Lihue to 5kft at Hilo. This not only forced trades to strengthen today but also provided a favorable environment for local accelerations in the windier locations of Maui County and the Big Island. The wind advisory will remain in effect through tonight.
Dry trades will hold firm tonight into Monday as existing high stability is reinforced by a very dry ~850-750mb airmass moving into the area from the east. Trades will weaken to breezy during this time, focusing limited showers over windward zones as high clouds slowly peel off to the north and east. Trades will usher in a band of remnant frontal moisture Monday night bringing an uptick in light windward showers Monday night. Otherwise, relatively dry weather continues through mid-week as building mid-level ridging brings continued continued stability and ensures rainfall stays on the lighter side.
Aviation
A large area of high pressure north northeast of the state will continue to bring moderate to breezy easterly trades across the islands tonight. Thus, scattered showers will mainly affect windward areas with very little precipitation elsewhere. Brief MVFR ceilings and visibility may occur with this activity, though not expecting anything widespread.
AIRMET Tango remains in effect below 7000 feet over and immediately south through west of mountains due to tempo moderate turbulence.
Marine
Strong trades will continue tonight, with Gale-force conditions in most of the windy waters around Maui and the Big Island. A Gale Warning remains in effect for these waters through 6 AM Sunday, with a Small Craft Advisory (SCA) in place for all other waters. The trades will ease into the moderate to locally strong range Sunday, then hold at those levels through the work week. The SCA will likely be scaled back to mainly the eastern waters on Sunday.
Surf along east facing shores will hold at or above normal levels through next weekend due the persistent moderate to strong trades over and upstream of the islands. Otherwise, surf along north, south, and west facing shores will remain small through next weekend.
HFO Watches/Warnings/Advisories
Wind Advisory until 6 AM HST Sunday for Lanai Mauka, Kahoolawe, Maui Windward West, Maui Leeward West, Kohala, Big Island Interior, Lanai Windward, Lanai Leeward, Maui Central Valley North, Maui Central Valley South, Windward Haleakala, Kipahulu, South Haleakala, Big Island South, Big Island Southeast, Big Island North.
Small Craft Advisory from 6 AM to 6 PM HST Sunday for Maalaea Bay, Pailolo Channel, Alenuihaha Channel.
Gale Warning until 6 AM HST Sunday for Maalaea Bay, Pailolo Channel, Alenuihaha Channel.
Small Craft Advisory until 6 PM HST Sunday for Maui County Windward Waters, Big Island Windward Waters, Big Island Leeward Waters, Big Island Southeast Waters.
Small Craft Advisory until 6 AM HST Sunday for Kauai Northwest Waters, Kauai Windward Waters, Kauai Leeward Waters, Kauai Channel, Oahu Windward Waters, Oahu Leeward Waters, Kaiwi Channel, Maui County Leeward Waters.
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