Weather Forecast

Hawaii County Weather Forecast for April 16, 2024

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Hilo

Today: Mostly cloudy with isolated showers. Highs around 78 near the shore to 62 to 67 at 4000 feet. Northeast winds up to 10 mph. Chance of rain 20 percent.

Tonight: Mostly cloudy. Isolated showers in the evening, then scattered showers after midnight. Lows 64 to 69 near the shore to around 51 at 4000 feet. North winds up to 10 mph in the evening becoming light. Chance of rain 30 percent.

Wednesday: Mostly cloudy. Scattered showers early in the morning, then isolated showers in the late morning and afternoon. Highs around 78 near the shore to 62 to 67 at 4000 feet. North winds up to 10 mph. Chance of rain 30 percent.

Kona

Today: Partly sunny. Isolated showers in the afternoon. Highs around 80 near the shore to around 63 near 5000 feet. Northwest winds up to 15 mph. Chance of rain 20 percent.

Tonight: Partly cloudy with isolated showers. Lows 68 to 73 near the shore to around 52 near 5000 feet. North winds up to 10 mph in the evening becoming light. Chance of rain 20 percent.

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Wednesday: Mostly sunny early in the morning then becoming partly sunny. Isolated showers. Highs around 80 near the shore to around 63 near 5000 feet. West winds up to 10 mph. Chance of rain 20 percent.

Waimea

Today: Partly sunny with isolated showers. Highs around 76 near the shore to 63 to 72 near 3000 feet. Northwest winds up to 10 mph. Chance of rain 20 percent.

Tonight: Mostly cloudy with isolated showers in the evening, then partly cloudy with scattered showers after midnight. Lows around 66 near the shore to 52 to 59 near 3000 feet. West winds up to 10 mph in the evening becoming light. Chance of rain 30 percent.

Wednesday: Mostly sunny early in the morning then becoming partly sunny. Scattered showers early in the morning, then isolated showers in the late morning and afternoon. Highs around 76 near the shore to 63 to 72 near 3000 feet. Northeast winds up to 10 mph. Chance of rain 30 percent.

Kohala

Today: Partly sunny with isolated showers. Highs around 76 near the shore to 63 to 72 near 3000 feet. Northwest winds up to 10 mph. Chance of rain 20 percent.

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Tonight: Mostly cloudy with isolated showers in the evening, then partly cloudy with scattered showers after midnight. Lows around 66 near the shore to 52 to 59 near 3000 feet. West winds up to 10 mph in the evening becoming light. Chance of rain 30 percent.

Wednesday: Mostly sunny early in the morning then becoming partly sunny. Scattered showers early in the morning, then isolated showers in the late morning and afternoon. Highs around 76 near the shore to 63 to 72 near 3000 feet. Northeast winds up to 10 mph. Chance of rain 30 percent.

South Big Island

Today: Partly sunny with isolated showers. Highs around 81 near the shore to around 67 near 5000 feet. West winds up to 15 mph. Chance of rain 20 percent.

Tonight: Partly cloudy. Isolated showers in the evening. Lows 65 to 72 near the shore to around 51 near 5000 feet. Southwest winds up to 10 mph in the evening becoming light. Chance of rain 20 percent.

Wednesday: Mostly sunny in the morning then becoming partly sunny. Highs around 81 near the shore to around 67 near 5000 feet. Southeast winds up to 10 mph.

Puna

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Today: Mostly cloudy with isolated showers. Highs around 78 near the shore to 62 to 67 at 4000 feet. Northeast winds up to 10 mph. Chance of rain 20 percent.

Tonight: Mostly cloudy. Isolated showers in the evening, then scattered showers after midnight. Lows 64 to 69 near the shore to around 51 at 4000 feet. North winds up to 10 mph in the evening becoming light. Chance of rain 30 percent.

Wednesday: Mostly cloudy. Scattered showers early in the morning, then isolated showers in the late morning and afternoon. Highs around 78 near the shore to 62 to 67 at 4000 feet. North winds up to 10 mph. Chance of rain 30 percent.

Waikoloa

Today: Partly sunny with isolated showers. Highs around 82 near the shore to 64 to 69 above 4000 feet. West winds up to 10 mph. Chance of rain 20 percent.

Tonight: Partly cloudy. Isolated showers in the evening. Lows 67 to 73 near the shore to 48 to 55 above 4000 feet. Southeast winds up to 10 mph. Chance of rain 20 percent.

Wednesday: Mostly sunny in the morning then becoming partly sunny. Highs around 82 near the shore to 64 to 69 above 4000 feet. West winds up to 10 mph.

Detailed Forecast

Synopsis

Mostly dry and pleasant conditions will prevail through the week as high pressure builds to the north. Light to moderate northerly winds will shift out of a more typical northeast trade wind direction Wednesday through the second half of the week. As the trades return, clouds and light showers will favor the typical windward and mauka locations overnight through the morning hours.

Discussion

The morning satellite imagery showed deep low pressure to the north and its attendant surface front that moved through over the past couple of days shifting east of the state as a trough. The back edge of the low-level cloud band currently over the Big Island will linger this morning with a few spotty showers, then shift east of the area later today. Elsewhere, light to moderate north-northwest winds have filled in over the islands in the wake of the front, ushering in a much drier air mass. Dewpoints have dipped into the upper 50s to low 60s, which have led to pleasant conditions. The latest model guidance has initialized well with the current pattern and depicts mostly dry conditions prevailing through the week as high pressure builds north of the state. The northerly winds will linger into Wednesday (light enough for localized land/sea breezes to form), then shift out of the northeast through the rest of the week. The strong winds at the summits of the Big Island will continue to ease today through midweek as the upper system moves away from the area. Although mostly dry conditions will prevail, a weak upper trough moving in Wednesday through Thursday, combined with a remnant low-level moisture boundary settling south into the area may be enough for a few light showers over north through northeast facing slopes. The breezy trades will weaken briefly late Friday through Saturday as a weak system passes to the north, then return to breezy levels Sunday into early next week as high pressure builds to the north.

Aviation

A weak front near the Big Island will shift slowly southeast today, with light northerly flow filling in across the island chain. The winds will be light enough to allow for daytime sea breezes and overnight land breezes in many areas. Lingering low clouds and showers will keep some MVFR cigs/vsbys affecting the Big Island early this morning, with improving conditions expected later today. Elsewhere, VFR conditions are expected during the next 24 hours.
AIRMET Sierra remains in effect for mountain obscuration across windward sections of the Big Island. Conditions should improve here later this morning.
AIRMET Tango remains in effect for moderate turbulence N through NE of the mountains on the Big Island. This AIRMET will likely be cancelled later this morning.

Marine

Remnants of the old front near the Big Island will dissipate and drift southeast today. Light to moderate northwest to north winds have filled in behind the front except moderate south to southwest winds over the far east Big Island waters. Winds look to veer through the day with light northwest to north winds, before moderate to fresh northeast winds will fill in by late Wednesday through Friday.
Surf along north and west facing shores has filled in overnight as a mixed- period northwest swell continues to build at nearshore PacIOOS Waimea Buoy, bringing elevated surf to exposed shores. A Small Craft Advisory for Kauai waters for seas is in effect through 6 pm HST today. This swell will hold through the day then gradually diminish as it becomes increasingly north Wednesday. Otherwise, a combination of southeast and southwest swells will support small to moderate surf along south facing shores the next couple of days. Surf along east facing shores will remain very small, then gradually trend up as the northeast trade winds increase later in the week.

HFO Watches/Warnings/Advisories

High Wind Warning until 10 AM HST this morning for Big Island Summits.
Small Craft Advisory until 6 PM HST this evening for Kauai Northwest Waters, Kauai Windward Waters, Kauai Leeward Waters.

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Data Courtesy of NOAA.gov

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