Weather Forecast

Hawaii County Weather Forecast for June 20, 2022

June 20, 2022, 7:15 AM HST
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Photo Credit: James Grenz

Hilo

Today: Mostly cloudy with showers likely. Highs around 83 near the shore to 68 to 73 at 4000 feet. Southeast winds up to 15 mph shifting to the east in the afternoon. Chance of rain 70 percent.

Tonight: Mostly cloudy with scattered showers. Lows around 66 near the shore to around 52 at 4000 feet. East winds up to 10 mph shifting to the north after midnight. Chance of rain 50 percent.

Tuesday: 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.

Kona

Today: Mostly sunny with isolated showers in the morning, then mostly cloudy 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 with scattered showers in the evening, then partly cloudy with isolated showers after midnight. Lows 67 to 73 near the shore to around 53 near 5000 feet. Light winds. Chance of rain 50 percent.

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Tuesday: 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: Breezy. Partly sunny with scattered showers. Highs around 81 near the shore to 68 to 78 near 3000 feet. East winds up to 20 mph. Chance of rain 50 percent.

Tonight: Mostly cloudy in the evening then becoming partly cloudy. Breezy. Scattered showers. Lows around 66 near the shore to 54 to 60 near 3000 feet. East winds 10 to 20 mph decreasing to up to 20 mph after midnight. Chance of rain 50 percent.

Tuesday: Breezy. Partly sunny with scattered showers. Highs around 80 near the shore to 68 to 78 near 3000 feet. East winds up to 25 mph increasing to 10 to 25 mph in the afternoon. Chance of rain 50 percent.

Kohala

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Today: Breezy. Partly sunny with scattered showers. Highs around 81 near the shore to 68 to 78 near 3000 feet. East winds up to 20 mph. Chance of rain 50 percent.

Tonight: Mostly cloudy in the evening then becoming partly cloudy. Breezy. Scattered showers. Lows around 66 near the shore to 54 to 60 near 3000 feet. East winds 10 to 20 mph decreasing to up to 20 mph after midnight. Chance of rain 50 percent.

Tuesday: Breezy. Partly sunny with scattered showers. Highs around 80 near the shore to 68 to 78 near 3000 feet. East winds up to 25 mph increasing to 10 to 25 mph in the afternoon. Chance of rain 50 percent.

South Big Island

Today: Breezy. Mostly sunny with isolated showers 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 10 to 25 mph. Chance of rain 40 percent.

Tonight: Mostly cloudy early in the evening then becoming mostly clear. Breezy. Scattered showers early in the evening. Lows around 68 near the shore to around 51 near 5000 feet. Northeast winds 10 to 20 mph. Chance of rain 40 percent.

Tuesday: Mostly sunny. Breezy. Isolated 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 20 percent.

Puna

Today: Mostly cloudy with showers likely. Highs around 83 near the shore to 68 to 73 at 4000 feet. Southeast winds up to 15 mph shifting to the east in the afternoon. Chance of rain 70 percent.

Tonight: Mostly cloudy with scattered showers. Lows around 66 near the shore to around 52 at 4000 feet. East winds up to 10 mph shifting to the north after midnight. Chance of rain 50 percent.

Tuesday: 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.

Waikoloa

Today: Mostly sunny with isolated showers 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 10 mph shifting to the northwest in the afternoon. Chance of rain 50 percent.

Tonight: Mostly cloudy with scattered showers early in the evening, then partly cloudy with isolated showers in the late evening and overnight. Lows 68 to 73 near the shore to 49 to 56 above 4000 feet. Northeast winds up to 15 mph shifting to the southeast after midnight. Chance of rain 50 percent.

Tuesday: Mostly sunny in the morning, then partly sunny with isolated showers in the afternoon. Highs around 85 near the shore to 69 to 75 above 4000 feet. North winds up to 15 mph. Chance of rain 20 percent.

Detailed Forecast

Synopsis

Moderate to locally breezy trade winds will persist through the middle of the week, with a slight easing possible late in the week into next weekend. A typical rainfall pattern will focus rainfall along windward areas, with a few showers reaching leeward sections of the smaller islands at times. Meanwhile leeward portions of the Big Island will see a few showers each afternoon and during the overnight hours.

Discussion

Currently at the surface, a 1032 mb high is centered around 1700 miles northeast of Honolulu, and is driving moderate to locally breezy trade winds across the island chain early this morning. Infrared satellite imagery shows mostly clear to partly cloudy conditions across much of the state, with a bit more cloud cover over windward sections of the Big Island. Radar imagery shows scattered showers moving into windward areas, with mainly dry conditions in leeward areas. Main short term focus revolves around rain chances and trade wind trends.
High pressure northeast of the state will strengthen slightly during the next couple days and remain nearly stationary to the northeast of the island chain through mid week. This will keep moderate to locally breezy trade winds in place across the state. The high will begin to weaken and lift northeastward and further away from the region through the remainder of the work week and into the weekend, while a new building high builds to the north of the island chain. Moderate to locally breezy trades appear to hold on through at least Thursday, with the latest model trends suggesting there may only be a subtle easing of the trades Friday through the weekend.
As for the remaining weather details, very typical June weather will prevail, with bands of showery low clouds moving through the islands at times. Showers will be most prevalent in windward areas, particularly at night and during the early morning hours, with a few showers reaching leeward areas of the smaller islands from time to time. A few showers will affect leeward Big Island each day as well, mainly in the afternoon and overnight hours.

Aviation

A high pressure system far northeast of the islands will keep moderate to locally breezy trade winds in the forecast through Tuesday. A band of unstable clouds currently just east of the island chain will bring additional clouds and showers mainly into windward and mountain areas today. Expect periods of showers over windward sections of each island through Tuesday morning as this band slowly passes through the state. This cloud band may also bring brief showers into typically drier leeward areas today and tonight.
An AIRMET for mountain obscurations was issued this morning for windward sections of the Big Island and Maui. Brief MVFR conditions and showers will spread westward to windward sections of the smaller islands later today.

Marine

Fresh to strong easterly trade winds will continue through midweek, then potentially ease to moderate to fresh levels by Friday as the ridge weakens. The Small Craft Advisory for the typically windier areas around Maui County and Big Island remains has been extended through Tuesday.
Surf along south facing shores will remain up through the first half of the week as overlapping southwest to south-southwest swells roll through. The one arriving later today should peak by Tuesday night, hold through midweek, then ease through the second half of the week. Plenty of action currently east-southeast of New Zealand will translate to another run of above average surf to end the month. This source should arrive by the end of next weekend out of the south.
Surf along exposed north and west facing shores came up over the weekend and is running a little higher at select spots than predicted. Early morning buoy observations support this trend continuing through the morning hours, before easing this afternoon through Tuesday. After this moves out, a return of summer time conditions is expected up north.
Surf along east facing shores will small and choppy each day as the trades hold. Guidance does depict a small to moderate northeast swell moving through next weekend from a batch of strong northeast winds off the west coast.

HFO Watches/Warnings/Advisories

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

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Data Courtesy of NOAA.gov

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