Hilo

Rest Of Tonight: Mostly cloudy. Scattered showers early in the evening, then numerous showers. Lows 62 to 69 near the shore to 49 to 56 at 4000 feet. Northeast winds 10 to 15 mph shifting to the north. Chance of rain 70 percent.

Wednesday: Partly sunny with scattered showers in the morning, then mostly sunny with isolated showers in the afternoon. Highs 80 to 86 near the shore to 66 to 71 at 4000 feet. Northeast winds up to 15 mph increasing to 10 to 15 mph in the afternoon. Chance of rain 50 percent.

Wednesday Night: Mostly cloudy. Numerous showers in the evening, then occasional showers after midnight. Lows 63 to 69 near the shore to 50 to 57 at 4000 feet. Northeast winds up to 10 mph. Chance of rain 80 percent.

Kona

Rest Of Tonight: Mostly cloudy. Scattered showers early in the evening, then isolated showers after midnight. Haze through the night. Lows around 71 near the shore to around 49 near 5000 feet. Light winds. Chance of rain 40 percent.

Wednesday: Mostly sunny in the morning, then partly sunny with isolated showers in the afternoon. Haze through the day. Highs around 86 near the shore to around 69 near 5000 feet. Light winds. Chance of rain 20 percent.

Wednesday Night: Partly cloudy with isolated showers. Haze through the night. Lows 69 to 74 near the shore to 46 to 52 near 5000 feet. Light winds becoming east up to 10 mph after midnight. Chance of rain 20 percent.

Waimea

Rest Of Tonight: Mostly cloudy. Breezy. Isolated showers early in the evening, then scattered showers. Lows 62 to 70 near the shore to 54 to 61 near 3000 feet. East winds 10 to 25 mph. Chance of rain 50 percent.

Wednesday: Breezy. Mostly sunny with isolated showers. Highs around 82 near the shore to 70 to 81 near 3000 feet. East winds 10 to 25 mph. Chance of rain 20 percent.

Wednesday Night: Mostly cloudy in the evening then becoming partly cloudy. Breezy. Scattered showers. Lows 62 to 70 near the shore to 54 to 62 near 3000 feet. East winds 10 to 20 mph. Chance of rain 40 percent.

Kohala

Rest Of Tonight: Mostly cloudy. Breezy. Isolated showers early in the evening, then scattered showers. Lows 62 to 70 near the shore to 54 to 61 near 3000 feet. East winds 10 to 25 mph. Chance of rain 50 percent.

Wednesday: Breezy. Mostly sunny with isolated showers. Highs around 82 near the shore to 70 to 81 near 3000 feet. East winds 10 to 25 mph. Chance of rain 20 percent.

Wednesday Night: Mostly cloudy in the evening then becoming partly cloudy. Breezy. Scattered showers. Lows 62 to 70 near the shore to 54 to 62 near 3000 feet. East winds 10 to 20 mph. Chance of rain 40 percent.

South Big Island

Rest Of Tonight: Breezy. Mostly cloudy with isolated showers early in the evening, then partly cloudy after midnight. Haze through the night. Lows around 71 near the shore to around 52 near 5000 feet. East winds 10 to 20 mph. Chance of rain 20 percent.

Wednesday: Mostly sunny. Breezy and haze. Highs around 87 near the shore to around 68 near 5000 feet. East winds up to 25 mph increasing to 10 to 25 mph in the afternoon.

Wednesday Night: Partly cloudy. Breezy and haze. Lows around 72 near the shore to around 52 near 5000 feet. East winds 10 to 20 mph.

Puna

Rest Of Tonight: Mostly cloudy. Scattered showers early in the evening, then numerous showers. Lows 62 to 69 near the shore to 49 to 56 at 4000 feet. Northeast winds 10 to 15 mph shifting to the north. Chance of rain 70 percent.

Wednesday: Partly sunny with scattered showers in the morning, then mostly sunny with isolated showers in the afternoon. Highs 80 to 86 near the shore to 66 to 71 at 4000 feet. Northeast winds up to 15 mph increasing to 10 to 15 mph in the afternoon. Chance of rain 50 percent.

Wednesday Night: Mostly cloudy. Numerous showers in the evening, then occasional showers after midnight. Lows 63 to 69 near the shore to 50 to 57 at 4000 feet. Northeast winds up to 10 mph. Chance of rain 80 percent.

Waikoloa

Rest Of Tonight: Partly cloudy. Breezy. Isolated showers early in the evening. Lows around 72 near the shore to 48 to 54 above 4000 feet. East winds up to 20 mph shifting to the southeast after midnight. Gusts up to 40 mph. Chance of rain 20 percent.

Wednesday: Mostly sunny. Highs 86 to 91 near the shore to 66 to 75 above 4000 feet. Northeast winds up to 15 mph.

Wednesday Night: Partly cloudy. Lows around 73 near the shore to 48 to 54 above 4000 feet. East winds up to 15 mph.

Detailed Forecast

Update

Based on recent observations across Maui County and the Big Island and given the latest guidance will let the Wind Advisory expire on time as winds continue to weaken. However, may continue to see some isolated advisory winds in the most wind prone areas tonight, but widespread advisory winds are not anticipated.

Synopsis

A strong high pressure ridge north of the Hawaiian Islands will continue to produce breezy to windy trade winds through this evening, with the strongest winds focused across Maui County and the Big Island. Dry weather conditions will combine with these strong gusty winds to keep elevated fire danger across the state through this evening, mainly over the drier leeward slopes. Winds will ease starting Wednesday, with a ridge aloft confining brief passing showers to mainly windward and mauka areas.

Discussion

Strong high pressure north of the Hawaiian Islands will maintain breezy to windy easterly trade winds across the state. A Wind Advisory remains in effect through this evening for the windier areas of Maui and Hawaii Counties; including the summits of Mauna Kea and Mauna Loa on the Big Island. Given the latest trends and model guidance will likely let the Wind Advisory expire at 6 PM this evening, but would not be surprised to see isolated advisory gusts continue into tonight.
In addition, the relatively dry humidity levels will combine with the strong winds to keep elevated fire weather conditions across the state, mainly over drier and windier leeward areas. Please refer to the Fire Weather section below for more details.
Satellite imagery this afternoon continue to show bands of fairly stable clouds moving into windward and mauka areas, with radar imagery showing light passing showers moving across the islands. The ridge aloft continue to keep inversion heights around 5,000 to 6,000 feet this afternoon based on soundings at Hilo and Lihue.
The pattern will begin to change tonight into Wednesday as high pressure north of the state weakens. This will allow our strong winds to gradually weaken overnight, with moderate to breezy trades expected for the rest of the week. As the high weakens will also see the inversion lift back to around 7,000 to 8,000 feet. This will allow clouds to grow higher, with a return towards typical summer time trade wind weather expected. An upper level low just southwest of the islands will help to enhance sunrise and sunsets as cirrus clouds stream across the region.

Aviation

Strong and gusty trades continue through this afternoon and then ease on Wednesday. High stability favors continued scattered light showers with a high coverage of overnight cloud cover windward and mauka where the occasional MVFR condition will be possible. Otherwise, VFR prevails.
AIRMET Tango remains for lee turb remains in effect.

Marine

High pressure far northeast of the islands will support fresh to strong trades across the area. A Small Craft Advisory (SCA) is now in effect for all Hawaiian coastal waters through 6 AM HST Wednesday. The surface high will move eastward and weaken slightly during the second half of the week, but winds are likely to remain breezy to locally strong in the windier channels and waters of Maui County and the Big Island through the rest of the week.
A small mid-period south swell will continue through Thursday. A slight boost to the period expected on Saturday. Another small, long- period swell expected next Sunday night into Monday. Surf along south facing shores will boost along with the arrival of the mentioned swells. Surf along east-facing shores will be rough and choppy due to the breezy trade winds that will persist the rest of the week.

HFO Watches/Warnings/Advisories

Small Craft Advisory until 6 AM HST Wednesday for all Hawaiian waters,

Data Courtesy of NOAA.gov