Today: Mostly sunny in the morning then becoming partly sunny. Isolated showers. Highs around 82 near the shore to 66 to 74 at 4000 feet. Northeast winds up to 15 mph increasing to 10 to 15 mph in the afternoon. Chance of rain 20 percent.
Tonight: Mostly cloudy with scattered showers. Lows 63 to 72 near the shore to around 56 at 4000 feet. Northwest winds up to 15 mph. Chance of rain 50 percent.
Tuesday: Partly sunny. Showers likely in the morning, then scattered showers in the afternoon. Highs around 82 near the shore to 66 to 74 at 4000 feet. Northeast winds 10 to 15 mph. Chance of rain 70 percent.
Kona
Today: Sunny in the morning, then mostly cloudy with isolated showers in the afternoon. Highs 83 to 88 near the shore to around 69 near 5000 feet. Light winds. Chance of rain 20 percent.
Tonight: Mostly cloudy in the evening then becoming mostly clear. Isolated showers. Lows around 72 near the shore to 50 to 56 near 5000 feet. Light winds. Chance of rain 20 percent.
ARTICLE CONTINUES BELOW AD
ARTICLE CONTINUES BELOW AD
Tuesday: Sunny in the morning, then mostly cloudy with isolated showers in the afternoon. Highs 83 to 88 near the shore to around 69 near 5000 feet. Light winds. Chance of rain 20 percent.
Waimea
Today: Breezy. Mostly sunny with isolated showers. Highs 67 to 87. East winds 10 to 25 mph. Chance of rain 20 percent.
Tonight: Breezy. Mostly cloudy with isolated showers in the evening, then partly cloudy with scattered showers after midnight. Lows around 65 near the shore to 55 to 62 near 3000 feet. East winds 10 to 25 mph decreasing to up to 20 mph after midnight. Chance of rain 50 percent.
Tuesday: Mostly sunny. Breezy. Scattered showers in the morning, then isolated showers in the afternoon. Highs 67 to 87. East winds 15 to 25 mph. Chance of rain 50 percent.
Kohala
Today: Breezy. Mostly sunny with isolated showers. Highs 67 to 87. East winds 10 to 25 mph. Chance of rain 20 percent.
ARTICLE CONTINUES BELOW AD
Tonight: Breezy. Mostly cloudy with isolated showers in the evening, then partly cloudy with scattered showers after midnight. Lows around 65 near the shore to 55 to 62 near 3000 feet. East winds 10 to 25 mph decreasing to up to 20 mph after midnight. Chance of rain 50 percent.
Tuesday: Mostly sunny. Breezy. Scattered showers in the morning, then isolated showers in the afternoon. Highs 67 to 87. East winds 15 to 25 mph. Chance of rain 50 percent.
South Big Island
Today: Sunny and breezy. Highs around 84 near the shore to around 68 near 5000 feet. East winds 10 to 20 mph.
Tonight: Mostly clear. Lows around 72 near the shore to around 52 near 5000 feet. Northeast winds 10 to 15 mph.
Tuesday: Sunny and breezy. Highs around 84 near the shore to around 68 near 5000 feet. East winds up to 15 mph increasing to 10 to 25 mph in the afternoon.
Puna
ARTICLE CONTINUES BELOW AD
Today: Mostly sunny in the morning then becoming partly sunny. Isolated showers. Highs around 82 near the shore to 66 to 74 at 4000 feet. Northeast winds up to 15 mph increasing to 10 to 15 mph in the afternoon. Chance of rain 20 percent.
Tonight: Mostly cloudy with scattered showers. Lows 63 to 72 near the shore to around 56 at 4000 feet. Northwest winds up to 15 mph. Chance of rain 50 percent.
Tuesday: Partly sunny. Showers likely in the morning, then scattered showers in the afternoon. Highs around 82 near the shore to 66 to 74 at 4000 feet. Northeast winds 10 to 15 mph. Chance of rain 70 percent.
Waikoloa
Today: Sunny and breezy. Highs 80 to 88 near the shore to 67 to 73 above 4000 feet. North winds up to 15 mph shifting to the northeast up to 25 mph in the afternoon.
Tonight: Mostly clear. Breezy. Lows 69 to 74 near the shore to 49 to 56 above 4000 feet. Southeast winds up to 20 mph.
Tuesday: Sunny and breezy. Highs 80 to 88 near the shore to 67 to 73 above 4000 feet. Northeast winds up to 25 mph.
Detailed Forecast
Synopsis
Locally breezy trades will focus clouds and showers over windward areas through the week. An increase in showers is expected Wednesday and Thursday.
Discussion
Locally breezy trade winds will remain in place for the next couple of days as a pair of high pressure cells pass far north of the state. A mid level ridge will maintain stable conditions that will focus rainfall over windward areas and allow clouds and a few showers to develop over leeward Big Island slopes each afternoon. Small pockets of moisture within the trade winds will periodically boost windward rainfall, though rather dry conditions will prevail today. Winds on the summit of Haleakala will continue to decline today, and the advisory has been cancelled.
An increase in shower activity and a slight decrease in winds is expected mid week. A dissipating front, currently 800 miles northeast of the islands, will fall apart over the next couple of days, leaving a diffuse pool of low level moisture that will move over the state Wednesday and Thursday. A weak upper level trough will accompany this feature, likely providing a boost in showers, The upper trough will also relax the local surface pressure gradient and cause trades to drop slightly.
Expect moderate to locally breezy trade winds and a typical pattern of mainly windward showers heading into next weekend.
Aviation
Breezy easterly trade winds will continue, with clouds and light showers favoring windward and mauka locations. AIRMET Sierra for mountain obscuration remains in effect for windward areas of Kauai and Oahu through the early morning hours. A return of VFR CIGS is expected by mid morning.
AIRMET Tango remains in effect below 8000 feet over and immediately south through west of all mountains due to tempo moderate turbulence.
Marine
A high pressure ridge remains locked in place north of the islands through the week, producing moderate to locally strong trade winds each day. A Small Craft Advisory (SCA) remains in effect for the typical windier waters near Maui and the Big Island through Tuesday night. This SCA will likely be extended for these windier eastern waters and channels through the weekend.
The current small, medium period west-northwest swell will slowly fade through Wednesday. A larger, long period west-northwest swell will arrive in the islands on Thursday, elevating surf heights along exposed shores through Friday. A third larger, medium period, west-northwest swell arrives from Friday night onward, producing elevated surf along north and west facing shores through next weekend.
Overlapping background south swells will continue to keep small surf heights along south facing shores through Wednesday. A slightly larger, long period southwest swell generated from the Tasman Sea basin will arrive on Thursday, elevating south shore surf through next weekend. Choppy surf along east facing shores will build closer to seasonal averages through the week as trade winds strengthen.
HFO Watches/Warnings/Advisories
Small Craft Advisory until 6 AM HST Wednesday for Maalaea Bay, Pailolo Channel, Alenuihaha Channel, Big Island Leeward Waters, Big Island Southeast Waters.
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