Hawaii County Weather Forecast for June 21, 2022

Photo Credit: James Grenz

Hilo

Today: Partly sunny with scattered showers. Highs around 82 near the shore to 68 to 73 at 4000 feet. Northeast winds up to 15 mph shifting to the east in the afternoon. Chance of rain 50 percent.

Tonight: Mostly cloudy with showers likely. Lows around 67 near the shore to around 53 at 4000 feet. Northeast winds up to 10 mph shifting to the northwest after midnight. Chance of rain 70 percent.

Wednesday: Partly sunny. Showers likely in the morning, then scattered showers in the afternoon. Highs around 82 near the shore to 68 to 73 at 4000 feet. Northeast winds up to 15 mph increasing to 10 to 15 mph in the afternoon. Chance of rain 60 percent.

Kona

Today: Mostly sunny in the morning, then partly sunny with scattered showers in the afternoon. Highs 81 to 86 near the shore to around 68 near 5000 feet. West winds up to 10 mph. Chance of rain 50 percent.

Tonight: Mostly cloudy. Scattered showers in the evening, then isolated showers after midnight. Lows 68 to 74 near the shore to around 54 near 5000 feet. Light winds. Chance of rain 50 percent.

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Wednesday: Mostly sunny in the morning, then partly sunny with isolated showers in the afternoon. Highs 81 to 86 near the shore to around 68 near 5000 feet. West winds up to 10 mph. Chance of rain 20 percent.

Waimea

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Today: Mostly sunny in the morning then becoming partly sunny. Breezy. Scattered showers. Highs around 80 near the shore to 68 to 78 near 3000 feet. East winds up to 25 mph shifting to the northeast 10 to 25 mph in the afternoon. Chance of rain 50 percent.

Tonight: Breezy. Mostly cloudy with showers likely. Lows around 67 near the shore to 55 to 61 near 3000 feet. East winds up to 20 mph. Chance of rain 70 percent.

Wednesday: Breezy. Mostly cloudy with isolated showers in the afternoon. Highs around 80 near the shore to 68 to 78 near 3000 feet. Southeast 10 to 20 mph. Chance of rain 60 percent.

Kohala

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Today: Mostly sunny in the morning then becoming partly sunny. Breezy. Scattered showers. Highs around 80 near the shore to 68 to 78 near 3000 feet. East winds up to 25 mph shifting to the northeast 10 to 25 mph in the afternoon. Chance of rain 50 percent.

Tonight: Breezy. Mostly cloudy with showers likely. Lows around 67 near the shore to 55 to 61 near 3000 feet. East winds up to 20 mph. Chance of rain 70 percent.

Wednesday: Breezy. Mostly cloudy with isolated showers in the afternoon. Highs around 80 near the shore to 68 to 78 near 3000 feet. Southeast 10 to 20 mph. Chance of rain 60 percent.

South Big Island

Today: Breezy. Sunny in the morning, then partly sunny with scattered showers in the afternoon. Highs around 85 near the shore to around 72 near 5000 feet. East winds up to 25 mph increasing to 10 to 25 mph in the afternoon. Chance of rain 30 percent.

Tonight: Breezy. Mostly cloudy with scattered showers in the evening, then partly cloudy with isolated showers after midnight. Lows around 69 near the shore to around 52 near 5000 feet. East winds 10 to 20 mph shifting to northeast up to 20 mph after midnight. Chance of rain 40 percent.

Wednesday: Breezy. Sunny in the morning, then partly sunny with isolated showers in the afternoon. Highs around 85 near the shore to around 72 near 5000 feet. East winds up to 20 mph increasing to 10 to 20 mph in the afternoon. Chance of rain 20 percent.

Puna

Today: Partly sunny with scattered showers. Highs around 82 near the shore to 68 to 73 at 4000 feet. Northeast winds up to 15 mph shifting to the east in the afternoon. Chance of rain 50 percent.

Tonight: Mostly cloudy with showers likely. Lows around 67 near the shore to around 53 at 4000 feet. Northeast winds up to 10 mph shifting to the northwest after midnight. Chance of rain 70 percent.

Wednesday: Partly sunny. Showers likely in the morning, then scattered showers in the afternoon. Highs around 82 near the shore to 68 to 73 at 4000 feet. Northeast winds up to 15 mph increasing to 10 to 15 mph in the afternoon. Chance of rain 60 percent.

Waikoloa

Today: Sunny in the morning, then partly sunny with scattered showers in the afternoon. Highs around 85 near the shore to 69 to 75 above 4000 feet. Northeast winds up to 15 mph shifting to the north in the afternoon. Chance of rain 50 percent.

Tonight: Partly cloudy with isolated showers. Lows 69 to 74 near the shore to 50 to 57 above 4000 feet. East winds up to 15 mph. Chance of rain 20 percent.

Wednesday: Mostly sunny. Breezy. Isolated showers in the afternoon. Highs around 85 near the shore to 69 to 75 above 4000 feet. Northwest up to 20 mph. Chance of rain 20 percent.

Synopsis

Moderate to locally breezy trade southeast will likely ease Friday and Saturday then rebuild Sunday into early next week. A band of enhanced moisture will move through the islands late this afternoon into early Wednesday, bringing an increased presence to windward areas and sending a few more showers into leeward locales. Otherwise, typical trade wind weather will prevail with showers favoring windward and mauka areas, along with the occasional brief shower spilling into leeward communities.

Discussion

Currently at the surface, a 1035 mb high centered around 1700 miles northeast of Honolulu, and driving moderate trade north east of the island chain early this morning. Infrared satellite imagery shows the cloud band which moved through the islands yesterday afternoon and evening has exited southwest of the state, leaving mostly clear cloudy conditions in place. Radar imaging Main short term focus revolves around rain chances and trade wind trends.
A rather typical June weather pattern will persist through the first week of summer. Surface high pressure anchored off northeast of the state will maintain moderate to locally breezy easterly trade southeast into Thursday. The trades will likely drop a Friday and Saturday as the surface high weakens, and a high pressure building north of the state should lead to strengthening trade in the north Sunday into early next week. The rainfall will continue to focus on windward slopes throughout the week. One area of ​​moisture is expected to move through the islands late this afternoon into early Wednesday, bringing an increased presence to windward areas and sending a few more showers into leeward locales. Otherwise, showers will be scattered to parched leeward areas from Maui to Kauai, while scattered showers can be expected afternoon and evening over leeward sections of the Big Island.

Aviation

A high pressure system northeast of the state will keep moderate to locally breezy trade southeast in the forecast through Wednesday. Expect brief passing showers mainly over windward and mountain areas, favoring the overnight to early morning hours. MVFR ceilings over windward airfields.
Or AIRMETS are currently in effect.

Marine

Friday to the ridge weakens. The Small Craft Advisory for the typically windier areas around Maui County and Big Island remains in effect through this afternoon. What may need to be extended into Wednesday later today depends on observations and trends.
Surf along south shores will build through the day as a fresh south-southwest swell continues to fill in. This swell is expected to peak later today through Wednesday, then slowly through the second half of the week. Offshore buoys reflect an upward trend this morning with the peak energy centered around the 17 and 19 second bands. For the extended, south east east of New Zealand will translate into another run of average surf toward the end of the month, beginning late this weekend.
Surf along exposed north west and south west shores will return to our typical summer levels today as the north-northwest swell moves out.
The trades hold. Guidance does not have a small to moderate northeast swell moving next weekend from a batch of strong northeast forecasting west west coast.

HFO Watches / Warnings / Advisories

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

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Courtesy Data of NOAA.gov

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