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Big Island Weather

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Pahala, Big Island Weather

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This Afternoon

79° F
Scattered Rain Showers
Wind 6 mph SE

Tonight

65° F
Scattered Rain Showers then Mostly Cloudy
Wind 1 to 5 mph NE

Thursday

79° F
Mostly Sunny then Showers And Thunderstorms Likely
Wind 2 to 12 mph E

Thursday Night

64° F
Showers And Thunderstorms Likely then Partly Cloudy
Wind 9 mph ENE

Friday

78° F
Mostly Sunny then Scattered Rain Showers
Wind 8 to 12 mph ENE

Friday Night

64° F
Partly Cloudy
Wind 13 mph ENE

Saturday

78° F
Partly Sunny then Scattered Rain Showers
Wind 15 mph ENE

Saturday Night

64° F
Partly Cloudy
Wind 15 mph ENE

Sunday

78° F
Partly Sunny then Isolated Rain Showers
Wind 15 mph ENE

Sunday Night

64° F
Isolated Rain Showers then Mostly Cloudy
Wind 12 to 15 mph ENE

Monday

80° F
Partly Sunny then Isolated Rain Showers
Wind 12 to 16 mph ENE

Monday Night

64° F
Isolated Rain Showers then Mostly Cloudy
Wind 15 mph ENE

Tuesday

80° F
Partly Sunny then Isolated Rain Showers
Wind 16 mph ENE

Tuesday Night

64° F
Isolated Rain Showers then Mostly Cloudy
Wind 13 to 16 mph ENE
Cloud Weather Radar

Regional Big Island Weather Forecast Hawaii County Weather Forecast for February 01, 2023

no slideshow

Hilo

Today: Mostly cloudy. Isolated showers in the morning. Isolated thunderstorms in the late morning and afternoon. Scattered showers in the afternoon. Highs 77 to 82 near the shore to 63 to 70 at 4000 feet. North winds up to 10 mph shifting to the northeast in the afternoon. Chance of rain 40 percent.

Tonight: Mostly cloudy. Isolated showers and thunderstorms early in the evening, then isolated showers in the late evening and overnight. Lows 60 to 68 near the shore to around 56 at 4000 feet. Light winds. Chance of rain 20 percent.

Thursday: Partly sunny. Isolated showers in the morning, then scattered showers and isolated thunderstorms in the afternoon. Highs 77 to 82 near the shore to 63 to 70 at 4000 feet. North winds up to 10 mph shifting to the east around 10 mph in the afternoon. Chance of rain 50 percent.

Kona

Today: Mostly cloudy. Isolated showers early in the morning, then isolated showers and thunderstorms in the late morning and afternoon. Highs 78 to 85 near the shore to around 67 near 5000 feet. Light winds becoming northwest up to 10 mph in the afternoon. Chance of rain 20 percent.

Tonight: Mostly cloudy. Isolated showers and thunderstorms early in the evening. Lows 67 to 72 near the shore to 46 to 53 near 5000 feet. Light winds. Chance of rain 20 percent.

Thursday: Partly sunny in the morning, then mostly sunny with scattered showers and isolated thunderstorms in the afternoon. Highs 78 to 84 near the shore to around 66 near 5000 feet. Southwest winds up to 10 mph. Chance of rain 50 percent.

Waimea

Today: Mostly cloudy. Isolated showers in the morning. Isolated thunderstorms in the late morning and afternoon. Scattered showers in the afternoon. Highs around 78 near the shore to 68 to 77 near 3000 feet. West winds up to 10 mph in the morning becoming light. Chance of rain 40 percent.

Tonight: Mostly cloudy. Isolated showers and thunderstorms early in the evening, then isolated showers in the late evening and overnight. Lows 60 to 69 near the shore to 52 to 60 near 3000 feet. Light winds. Chance of rain 20 percent.

Thursday: Partly sunny. Isolated showers in the morning, then scattered showers and isolated thunderstorms in the afternoon. Highs 63 to 81. Northeast winds up to 10 mph. Chance of rain 50 percent.

Kohala

Today: Mostly cloudy. Isolated showers in the morning. Isolated thunderstorms in the late morning and afternoon. Scattered showers in the afternoon. Highs around 78 near the shore to 68 to 77 near 3000 feet. West winds up to 10 mph in the morning becoming light. Chance of rain 40 percent.

Tonight: Mostly cloudy. Isolated showers and thunderstorms early in the evening, then isolated showers in the late evening and overnight. Lows 60 to 69 near the shore to 52 to 60 near 3000 feet. Light winds. Chance of rain 20 percent.

Thursday: Partly sunny. Isolated showers in the morning, then scattered showers and isolated thunderstorms in the afternoon. Highs 63 to 81. Northeast winds up to 10 mph. Chance of rain 50 percent.

South Big Island

Today: Mostly cloudy. Isolated showers early in the morning, then isolated showers and thunderstorms in the late morning and afternoon. Highs around 79 near the shore to around 66 near 5000 feet. South winds up to 10 mph. Chance of rain 20 percent.

Tonight: Mostly cloudy. Isolated showers and thunderstorms early in the evening. Lows around 71 near the shore to around 51 near 5000 feet. Light winds. Chance of rain 20 percent.

Thursday: Partly sunny in the morning, then mostly sunny with scattered showers and isolated thunderstorms in the afternoon. Highs around 80 near the shore to around 66 near 5000 feet. East winds up to 15 mph shifting to the southeast in the afternoon. Chance of rain 50 percent.

Puna

Today: Mostly cloudy. Isolated showers in the morning. Isolated thunderstorms in the late morning and afternoon. Scattered showers in the afternoon. Highs 77 to 82 near the shore to 63 to 70 at 4000 feet. North winds up to 10 mph shifting to the northeast in the afternoon. Chance of rain 40 percent.

Tonight: Mostly cloudy. Isolated showers and thunderstorms early in the evening, then isolated showers in the late evening and overnight. Lows 60 to 68 near the shore to around 56 at 4000 feet. Light winds. Chance of rain 20 percent.

Thursday: Partly sunny. Isolated showers in the morning, then scattered showers and isolated thunderstorms in the afternoon. Highs 77 to 82 near the shore to 63 to 70 at 4000 feet. North winds up to 10 mph shifting to the east around 10 mph in the afternoon. Chance of rain 50 percent.

Waikoloa

Today: Mostly cloudy. Isolated showers early in the morning, then isolated showers and thunderstorms in the late morning and afternoon. Highs 79 to 84 near the shore to around 67 above 4000 feet. East winds up to 10 mph shifting to the northwest in the afternoon. Chance of rain 20 percent.

Tonight: Mostly cloudy. Isolated showers and thunderstorms early in the evening. Lows around 70 near the shore to 48 to 55 above 4000 feet. Southeast winds up to 10 mph. Chance of rain 20 percent.

Thursday: Partly sunny in the morning, then mostly sunny with scattered showers and isolated thunderstorms in the afternoon. Highs 78 to 83 near the shore to around 66 above 4000 feet. North winds up to 10 mph shifting to the northwest in the afternoon. Chance of rain 50 percent.

Synopsis

Light winds will prevail for the next couple of days, with the island atmosphere somewhat unstable. Low clouds will generally clear over the islands during the night and morning, with afternoon sea breezes leading to cloud and shower formation over island interiors. Unstable trade winds will develop Friday through Sunday with locally heavy rainfall and isolated thunderstorms possible over some islands. Stronger and more stable trades develop by next week.

Discussion

The mid-level low that brought periods of heavy rain to the area over the weekend and earlier this week is seen on morning IR imagery drifting southwestward about 600 miles SW of Honolulu. The remnant moisture field over the islands has become more disorganized and fractured due to descending mid-level dry air lifting through Maui County and Oahu. Deeper low-level moisture resides in the vicinity of Kauai where light trade winds will favor occasional showers over windward slopes through Thursday. Southwesterlies wrapping around the eastern periphery of the low will supply a steady feed of cirrus over the eastern end of the state, but degrading moisture quality has brought an end to last evening's rain over the Big Island. At present, dry conditions prevail nearly everywhere courtesy of overnight land breezes.
Little change is expected this afternoon compared to yesterday. The aforementioned mid-level dry air will provide strong stability over the central islands which will limit the intensity of any interior showers there this afternoon. Meanwhile, convective potential over the Big Island will likely be limited by extensive high clouds, though isolated thunder is still possible by this afternoon. By Thursday, a slight strengthening of the gradient near Kauai brings an uptick in trade wind showers while clearing high clouds yields better potential for afternoon over the Big Island. Sea breezes may be slightly more productive over the central islands on Thursday afternoon, but stagnant mid-level dry air will continue to provide capping there.
Friday through Sunday will be characterized by strengthening trades as amplified and very broad longwave ridging works across the North Pacific Basin. At the same time, the aforementioned mid-level low will weaken and shear northeastward bringing a brief period of modest large scale forcing and a reduction in stability centered on Friday and Saturday. A period of wet and modestly unstable trades is anticipated during this time with locally heavy rainfall possible, mainly over windward and mauka zones. There is increased interest in this period for the western end of the state where low-level convergence will serve as a focus for deeper moisture and a band of more persistent & potentially heavy showers. As 500mb temperatures cool through the first half of the weekend, steepening lapse rates will favor pockets of thunderstorms developing within this band. As usual, the position and expected movement (or lack thereof) of the heavier rain band represent the primary sources of uncertainty. At this time, the EC is more progressive and results in a more even rainfall distribution while multiple runs of the GFS focus the heaviest rain over Kauai for a full 36-48 hours and suggests elevated flooding potential.
The low will be gone for good no later than Monday as it shears back into the prevailing westerlies. Consensus among the global models remains solid that a more stable breezy trade wind pattern will take hold for most or all of next week.

Aviation

Light winds will support early morning land breezes and daytime sea breezes today due to a surface trough in the area. Although VFR conditions will prevail through much of the period, afternoon showers could become heavy at times and lead to MVFR CIGS/VSBYS today. In addition to the potential for localized heavy showers, a thunderstorm or two can't be ruled out over the Big Island slopes this afternoon due to the added instability with the upper low nearby.
AIRMET Tango for moderate mid- and upper-level turbulence remains in effect due to the proximity of the upper low. These conditions are expected to persist today.

Marine

Light winds will prevail over the marine area through Thursday night as surface troughing lingers in the vicinity of the islands. Trade winds will begin to strengthen as high pressure builds north of the state on Friday. Fresh to strong trades are then expected this weekend, with Small Craft Advisories likely across the typically windy waters around Maui and the Big Island.
A series of small northwest swells (310-320 degrees) will keep surf relatively steady through Thursday, with a slow decline expected Friday and Saturday. A small north-northwest swell (340-350 degrees) is expected to build late Saturday and Saturday night then slowly decline as it shifts more northerly (360-010 degrees) Sunday through Monday. A new long period northwest swell (320 degrees) is expected to slowly build to moderate levels Monday through next Tuesday.
An out of season south swell will provide surf around summertime average through Thursday, with a slow decline expected Friday through Saturday. Mainly background south swell energy and small surf is expected along south facing shores Sunday through early next week.

HFO Watches/Warnings/Advisories

None.

Big Island Now Weather is brought to you by Blue Hawaiian Helicopters.

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Data Courtesy of NOAA.gov

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