Today: Partly sunny. Scattered showers in the morning, then isolated showers in the afternoon. Highs around 83 near the shore to around 74 at 4000 feet. East winds 10 to 15 mph. Chance of rain 30 percent.
Tonight: Mostly cloudy with numerous showers. Lows around 70 near the shore to around 56 at 4000 feet. East winds 10 to 15 mph shifting to the northeast after midnight. Chance of rain 70 percent.
Tuesday: Mostly cloudy. Numerous showers in the morning, then scattered showers in the afternoon. Highs around 86 near the shore to around 77 at 4000 feet. Northeast winds 10 to 15 mph. Chance of rain 70 percent.
Kona
Today: Mostly sunny in the morning then becoming partly sunny. Isolated showers. Highs 83 to 91 near the shore to 72 to 77 near 5000 feet. North winds up to 10 mph. Chance of rain 20 percent.
Tonight: Partly cloudy with isolated showers. Lows around 76 near the shore to 56 to 61 near 5000 feet. North winds up to 10 mph in the evening becoming light. Chance of rain 20 percent.
ARTICLE CONTINUES BELOW AD
ARTICLE CONTINUES BELOW AD
Tuesday: Mostly sunny in the morning, then mostly cloudy with scattered showers in the afternoon. Highs 82 to 91 near the shore to 72 to 80 near 5000 feet. Light winds. Chance of rain 40 percent.
Waimea
Today: Mostly sunny in the morning then becoming partly sunny. Breezy. Isolated showers. Highs around 85 near the shore to around 78 near 3000 feet. East winds 10 to 20 mph. Chance of rain 20 percent.
Tonight: Breezy. Mostly cloudy with scattered showers. Lows around 71 near the shore to around 60 near 3000 feet. East winds 10 to 20 mph. Chance of rain 50 percent.
Tuesday: Breezy. Partly sunny with scattered showers. Highs around 87 near the shore to 76 to 82 near 3000 feet. East winds 10 to 20 mph. Chance of rain 50 percent.
Kohala
Today: Mostly sunny in the morning then becoming partly sunny. Breezy. Isolated showers. Highs around 85 near the shore to around 78 near 3000 feet. East winds 10 to 20 mph. Chance of rain 20 percent.
ARTICLE CONTINUES BELOW AD
Tonight: Breezy. Mostly cloudy with scattered showers. Lows around 71 near the shore to around 60 near 3000 feet. East winds 10 to 20 mph. Chance of rain 50 percent.
Tuesday: Breezy. Partly sunny with scattered showers. Highs around 87 near the shore to 76 to 82 near 3000 feet. East winds 10 to 20 mph. Chance of rain 50 percent.
South Big Island
Today: Mostly sunny. Breezy. Highs 83 to 88 near the shore to around 72 near 5000 feet. East winds 10 to 25 mph.
Tonight: Partly cloudy. Breezy. Isolated showers in the evening. Lows around 72 near the shore to around 56 near 5000 feet. East winds 10 to 25 mph. Chance of rain 20 percent.
Tuesday: Mostly sunny. Breezy. Isolated showers in the afternoon. Highs 82 to 88 near the shore to around 73 near 5000 feet. East winds 10 to 25 mph. Chance of rain 20 percent.
Puna
ARTICLE CONTINUES BELOW AD
Today: Partly sunny. Scattered showers in the morning, then isolated showers in the afternoon. Highs around 83 near the shore to around 74 at 4000 feet. East winds 10 to 15 mph. Chance of rain 30 percent.
Tonight: Mostly cloudy with numerous showers. Lows around 70 near the shore to around 56 at 4000 feet. East winds 10 to 15 mph shifting to the northeast after midnight. Chance of rain 70 percent.
Tuesday: Mostly cloudy. Numerous showers in the morning, then scattered showers in the afternoon. Highs around 86 near the shore to around 77 at 4000 feet. Northeast winds 10 to 15 mph. Chance of rain 70 percent.
Waikoloa
Today: Mostly sunny. Highs 83 to 89 near the shore to 72 to 80 above 4000 feet. Northeast winds up to 10 mph.
Tonight: Partly cloudy. Isolated showers in the evening. Lows 71 to 76 near the shore to 55 to 62 above 4000 feet. Northeast winds up to 10 mph. Chance of rain 20 percent.
Tuesday: Sunny in the morning then becoming partly sunny. Highs 82 to 89 near the shore to 73 to 81 above 4000 feet. Northeast winds up to 10 mph.
Detailed Forecast
Synopsis
Fair weather is expected today, with a return to more typical trade wind weather Monday, with showers focused over windward and mauka areas. Trade winds will gradually strengthen to locally strong by the middle of the week, as an area of low pressure potentially develops and passes far south of the state.
Discussion
The shower activity by Kauai did taper off overnight as the surface trough has dissipated, so have lowered PoPs and Sky cover by the Garden Isle for today. Otherwise no significant changes to the forecast.
The upper level trough remains to the north through northwest of the main Hawaiian islands, with an upper level low forming along the southern end of the trough. Some wisps of high clouds will continue to pass over Kauai and Oahu, but are not expected to be thick enough to obscure much sun. A drier airmass over the islands today will limit shower activity.
Trade winds have been spreading over the islands from south to north, and are expected to become more widespread today, as high pressure becomes established north of the state. This trade wind pattern will focus showers over the typical windward areas through the middle of the week. Locally strong trades are possible, along with some increase in showers over the southern end of the state, by mid-week as an area of low pressure potentially develops and passes far south of the state.
Aviation
High pressure far northeast of the state will maintain breezy to locally strong trade winds for the next several days, with clouds and showers favoring windward and mauka areas. Expect mainly VFR conditions, with occasional periods of MVFR possible under passing showers.
AIRMET Tango remains in effect for portions of Maui and Molokai due to low-level mechanical turbulence leeward of mountains.
Marine
A ridge will build north of the area today and tomorrow. As a result, moderate to fresh trades will gradually build around Kauai and Oahu, in addition to the moderate to locally strong easterly trade winds that are already in place around the Big Island and Maui County. A Small Craft Advisory (SCA) for the typically windy waters around Maui County and the Big Island is in effect through Wednesday night. A further increase in wind speeds is expected late tomorrow or Wednesday as a tropical disturbance passes far south of the islands. This may require an expansion of the SCA to additional waters.
Little significant swell is anticipated through the week. Building trade winds will produce a gradual increase in short- period waves to east facing shores during the next couple of days, peaking near or slightly above seasonal average Wednesday into Thursday. A very small, long-period south swell may arrive tomorrow and fade by Thursday. A small, shorter-period south- southeast swell is expected over the next couple of days, with a larger pulse from the same direction possible this weekend.
HFO Watches/Warnings/Advisories
Small Craft Advisory until 6 AM HST Thursday for Maalaea Bay, Pailolo Channel, Alenuihaha Channel, Big Island Leeward Waters, Big Island Southeast Waters.
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