West Side

Today: Breezy. Mostly sunny with isolated showers. Highs 80 to 85. East winds up to 20 mph increasing to 10 to 20 mph in the afternoon. Chance of rain 20 percent.

Tonight: Breezy. Partly cloudy with isolated showers. Lows 68 to 74. Northeast winds 10 to 20 mph. Chance of rain 20 percent.

Saturday: Sunny and breezy. Isolated showers in the morning. Highs 80 to 85. Northeast winds 10 to 20 mph. Chance of rain 20 percent.

South Side

Today: Sunny and breezy. Highs around 88. North winds up to 25 mph.

Tonight: Breezy. Mostly clear with isolated showers. Lows 67 to 75. Northeast winds 10 to 20 mph. Chance of rain 20 percent.

Saturday: Sunny and breezy. Isolated showers in the morning. Highs around 88. Northeast winds 10 to 20 mph. Chance of rain 20 percent.

North Shore

Today: Breezy. Partly sunny with scattered showers. Highs 79 to 84 near the shore to around 67 near 5000 feet. East winds up to 20 mph. Chance of rain 50 percent.

Tonight: Partly cloudy in the evening then becoming mostly cloudy. Breezy. Scattered showers. Lows around 71 near the shore to around 51 near 5000 feet. East winds 10 to 20 mph. Chance of rain 50 percent.

Saturday: Partly sunny in the morning then becoming mostly sunny. Scattered showers. Highs 78 to 84 near the shore to around 66 near 5000 feet. East winds 10 to 15 mph. Chance of rain 50 percent.

Central Maui

Today: Mostly sunny. Breezy. Highs 81 to 88. Northeast winds 10 to 20 mph.

Tonight: Breezy. Partly cloudy with isolated showers. Lows around 69. Northeast winds 10 to 20 mph. Chance of rain 20 percent.

Saturday: Sunny and breezy. Isolated showers in the morning. Highs 80 to 87. Northeast winds 10 to 25 mph. Chance of rain 20 percent.

Upcountry

Today: Mostly sunny. Scattered showers in the morning, then isolated showers in the afternoon. Highs around 63 at the visitor center to around 73 at the summit. Northeast winds up to 10 mph. Chance of rain 50 percent.

Tonight: Partly cloudy with scattered showers. Lows around 47 at the visitor center to around 51 at the summit. Northeast winds up to 15 mph. Chance of rain 40 percent.

Saturday: Mostly sunny. Scattered showers in the morning. Highs around 62 at the visitor center to around 72 at the summit. East winds 10 to 15 mph. Chance of rain 40 percent.

East Maui

Today: Breezy. Partly sunny with scattered showers. Highs 79 to 84 near the shore to around 67 near 5000 feet. East winds up to 20 mph. Chance of rain 50 percent.

Tonight: Partly cloudy in the evening then becoming mostly cloudy. Breezy. Scattered showers. Lows around 71 near the shore to around 51 near 5000 feet. East winds 10 to 20 mph. Chance of rain 50 percent.

Saturday: Partly sunny in the morning then becoming mostly sunny. Scattered showers. Highs 78 to 84 near the shore to around 66 near 5000 feet. East winds 10 to 15 mph. Chance of rain 50 percent.

Lanai City

Today: Mostly sunny. Breezy. Isolated showers in the afternoon. Highs 72 to 81. Northeast winds up to 20 mph increasing to 10 to 25 mph in the afternoon. Chance of rain 20 percent.

Tonight: Breezy. Mostly clear with isolated showers. Lows 62 to 67. Northeast winds 10 to 25 mph. Chance of rain 20 percent.

Saturday: Sunny and breezy. Isolated showers in the morning. Highs 71 to 80. Northeast winds 15 to 25 mph. Chance of rain 20 percent.

Kaunakakai

Today: Mostly sunny. Breezy. Isolated showers in the morning. Highs 71 to 89. Northeast winds 10 to 25 mph. Chance of rain 20 percent.

Tonight: Breezy. Partly cloudy with isolated showers. Lows 60 to 74. Northeast winds 10 to 25 mph. Chance of rain 20 percent.

Saturday: Sunny and breezy. Isolated showers in the morning. Highs 71 to 89. East winds 10 to 25 mph. Chance of rain 20 percent.

Detailed Forecast

Synopsis

Breezy trades become strong this weekend into next week delivering limited clouds and showers mainly to windward and mauka areas.

Discussion

A elongated surface ridge north of the state is generating moderate to locally breezy tradewinds. Satellite and radar imagery show scattered clouds and showers mainly focused along windward and mauka regions for the eastern half of the state and should fill in for the western half of the state as the morning progresses. Rainfall totals for the past six hours generally ranged from 0.02 to 0.30 inches for the wetter windward around around Big Island and southeast Maui. Rainfall will remain generally light with a few showers becoming moderate around Kauai. A thin band of upper level clouds will continue to stream over the island and the associated upper level trough gradually become a weak low later today into Saturday over the state.
Sunday the weak upper level low will shift westward and dry mid level ridging will fill in. Another, strong surface high will build in from the west, reinforcing moderate to breezy trades into next week. This setup should limit clouds and light to moderate showers to windward and mauka areas.

Aviation

Periods of SHRA is currently generating period of MVFR ceiling and visibility mainly along windward slopes. Thus, AIRMET Sierra is currently in effect for all exposed and elevated windward terrain. VFR will dominate over most leeward areas, but sheltered terrain will experience isolated MVFR conditions each afternoon, especially on the Kona slopes of the Big Island. A stable, moderate to locally breezy trade wind flow will persist through today, before increasing slightly tonight into Saturday. The stable trade wind flow could produce moderate turbulence flow below 7,000 feet, leeward of mountainous terrain later today or over the weekend as winds increase which may require an AIRMET TANGO. An upper- level low developing west of Kauai may produce some light turbulence above FL300 as early as this afternoon.

Marine

High pressure far north of the islands will remain anchored for the next several days and maintain fresh to locally strong trade winds. A Small Craft Advisory for the windier waters and channels around Maui County and the Big Island remains in effect through Sunday, but will likely need to be expanded in coverage and extended into early next week.
Surf along south facing shores will be tiny to small through Saturday. A small, long period, south swell originating from a fetch near New Zealand will build on Sunday and help to boost surf heights through early next week.
Rough and choppy surf is expected for east facing shores through the forecast period due to the fresh to locally strong trades. Tiny seasonal surf is expected for north facing shores.

HFO Watches/Warnings/Advisories

Small Craft Advisory until 6 PM HST Sunday for Maalaea Bay, Pailolo Channel, Alenuihaha Channel, Big Island Leeward Waters, Big Island Southeast Waters.

Data Courtesy of NOAA.gov