Photo Credit: James Grenz

Hilo

Today: Cloudy with showers in the morning, then partly sunny with numerous showers in the afternoon. Highs 76 to 82 near the shore to around 65 at 4000 feet. North winds up to 10 mph shifting to the northeast in the afternoon. Chance of rain 80 percent.

Tonight: Cloudy with scattered showers. Lows 62 to 69 near the shore to around 55 at 4000 feet. North winds up to 10 mph in the evening becoming light. Chance of rain 50 percent.

Sunday: Mostly cloudy with scattered showers. Highs 77 to 82 near the shore to around 65 at 4000 feet. North winds up to 10 mph shifting to the east in the afternoon. Chance of rain 50 percent.

Kona

Today: Sunny in the morning, then partly sunny with isolated showers in the afternoon. Highs 81 to 86 near the shore to around 65 near 5000 feet. West winds up to 10 mph. Chance of rain 20 percent.

Tonight: Mostly cloudy. Lows around 72 near the shore to 49 to 54 near 5000 feet. Light winds.

Sunday: Mostly cloudy. Scattered showers in the afternoon. Highs 81 to 86 near the shore to around 65 near 5000 feet. Light winds. Chance of rain 50 percent.

Waimea

Today: Mostly cloudy. Breezy. Numerous showers in the morning, then scattered showers in the afternoon. Highs around 77 near the shore to 65 to 76 near 3000 feet. East winds up to 20 mph increasing to 10 to 20 mph in the afternoon. Chance of rain 70 percent.

Tonight: Mostly cloudy. Lows 62 to 69 near the shore to 53 to 61 near 3000 feet. East winds up to 15 mph.

Sunday: Partly sunny. Highs around 77 near the shore to 66 to 76 near 3000 feet. East winds up to 15 mph increasing to 10 to 15 mph in the afternoon.

Kohala

Today: Mostly cloudy. Breezy. Numerous showers in the morning, then scattered showers in the afternoon. Highs around 77 near the shore to 65 to 76 near 3000 feet. East winds up to 20 mph increasing to 10 to 20 mph in the afternoon. Chance of rain 70 percent.

Tonight: Mostly cloudy. Lows 62 to 69 near the shore to 53 to 61 near 3000 feet. East winds up to 15 mph.

Sunday: Partly sunny. Highs around 77 near the shore to 66 to 76 near 3000 feet. East winds up to 15 mph increasing to 10 to 15 mph in the afternoon.

South Big Island

Today: Breezy. Sunny in the morning, then partly sunny with isolated showers in the afternoon. Highs around 82 near the shore to around 65 near 5000 feet. East winds up to 20 mph. Chance of rain 20 percent.

Tonight: Mostly cloudy. Lows around 72 near the shore to around 52 near 5000 feet. Northeast winds up to 15 mph.

Sunday: Partly sunny. Breezy. Highs around 83 near the shore to around 65 near 5000 feet. East winds up to 20 mph.

Puna

Today: Cloudy with showers in the morning, then partly sunny with numerous showers in the afternoon. Highs 76 to 82 near the shore to around 65 at 4000 feet. North winds up to 10 mph shifting to the northeast in the afternoon. Chance of rain 80 percent.

Tonight: Cloudy with scattered showers. Lows 62 to 69 near the shore to around 55 at 4000 feet. North winds up to 10 mph in the evening becoming light. Chance of rain 50 percent.

Sunday: Mostly cloudy with scattered showers. Highs 77 to 82 near the shore to around 65 at 4000 feet. North winds up to 10 mph shifting to the east in the afternoon. Chance of rain 50 percent.

Waikoloa

Today: Mostly sunny with isolated showers in the morning, then partly sunny in the afternoon. Highs 80 to 86 near the shore to 63 to 70 above 4000 feet. North winds up to 15 mph. Chance of rain 20 percent.

Tonight: Mostly cloudy. Lows around 72 near the shore to 51 to 56 above 4000 feet. Southeast winds up to 10 mph.

Sunday: Mostly sunny in the morning then becoming mostly cloudy. Highs around 83 near the shore to 62 to 70 above 4000 feet. North winds up to 10 mph.

Detailed Forecast

Synopsis

A high pressure ridge will remain in place north of the state through much of next week. Expect moderate to locally breezy trade winds with brief passing showers favoring windward and mountain areas of each island in the overnight to early morning hours.

Discussion

High level cirrus clouds associated with a subtropical jet stream continue to stream from west to east over the islands. Two upper level lows as shown on water vapor imagery, west and northwest of Kauai, will weaken and remain north of the state without producing much impact to our island weather over the next few days.
A fairly stable weather pattern remains in place through much of next week with subsidence inversion heights ranging from 5,000 to 7,000 feet above sea level. This means cloud heights will be limited with mostly isolated to scattered showers over windward areas as trade winds push the clouds up and over the mountain slopes of each island. Isolated showers are possible over the typically drier leeward areas. Only subtle day to day changes in island weather are in the mix into the middle of next week.

Aviation

Moderate to breezy easterly trades will persist across the Hawaiian Islands through the rest of today. Sct SHRA will favor windward and mauka areas, with greater coverage expected during the overnight hours. Brief MVFR conds are possible in moderate SHRA. Otherwise, VFR conditions should prevail.
AIRMET Sierra is in effect for mtn obsc for windward locations on all islands.
AIRMET Tango is in effect for moderate low level turb downwind of terrain due to the breezy trade winds.

Marine

High pressure north of the state will maintain moderate to strong trade winds across the island chain through tonight. A Small Craft Advisory (SCA) remains in effect for the windiest waters around Maui and the Big Island through 6 AM Sunday. A trough will amplify and linger west of the islands Sunday through the middle of next week, resulting in a slight easing of the trades and a shift to a more east-southeast direction over the western end of the state. Moderate to locally strong easterly trades will prevail over the eastern waters.
South shore surf will remain small and below the summer average through the middle of next week, with only small and inconsistent pulses of southwest swell expected. The next significant south- southwest swell (200 degrees) appears to move in toward the end of next week. East shore surf will decrease slightly this weekend then hold steady through late next week. Surf along north shores will remain very small with a slight bump possible late Sunday through Monday.

HFO Watches/Warnings/Advisories

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

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Data Courtesy of NOAA.gov