Weather Forecast

Hawaii County Weather Forecast for September 07, 2021

September 7, 2021, 7:15 AM HST
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Photo Credit: James Grenz

Hilo

Today: Partly sunny with scattered showers. Highs 78 to 85 near the shore to 64 to 71 at 4000 feet. North winds up to 15 mph shifting to the northeast in the afternoon. Chance of rain 40 percent.

Tonight: Mostly cloudy with scattered showers. Lows 63 to 72 near the shore to 53 to 58 at 4000 feet. North winds up to 15 mph. Chance of rain 50 percent.

Wednesday: Partly sunny with scattered showers. Highs 78 to 85 near the shore to 64 to 71 at 4000 feet. Northeast winds 10 to 15 mph decreasing to up to 15 mph in the afternoon. Chance of rain 40 percent.

Kona

Today: Mostly sunny in the morning, then partly sunny with isolated showers in the afternoon. Highs 83 to 88 near the shore to around 69 near 5000 feet. West winds up to 10 mph. Chance of rain 20 percent.

Tonight: Mostly cloudy with isolated showers in the evening, then partly cloudy after midnight. Lows 70 to 75 near the shore to 51 to 56 near 5000 feet. Light winds. Chance of rain 20 percent.

ARTICLE CONTINUES BELOW AD

Wednesday: Mostly sunny in the morning, then mostly cloudy with isolated showers in the afternoon. Highs 83 to 88 near the shore to around 68 near 5000 feet. Light winds. Chance of rain 20 percent.

Waimea

ARTICLE CONTINUES BELOW AD

Today: Mostly sunny with isolated showers in the morning, then partly sunny with scattered showers in the afternoon. Highs 64 to 84. East winds up to 15 mph. Chance of rain 40 percent.

Tonight: Mostly cloudy with scattered showers. Lows 63 to 70 near the shore to 55 to 63 near 3000 feet. East winds 10 to 15 mph. Chance of rain 50 percent.

Wednesday: Partly sunny. Isolated showers in the morning, then scattered showers in the afternoon. Highs 64 to 84. East winds 10 to 15 mph. Chance of rain 40 percent.

Kohala

ARTICLE CONTINUES BELOW AD

Today: Mostly sunny with isolated showers in the morning, then partly sunny with scattered showers in the afternoon. Highs 64 to 84. East winds up to 15 mph. Chance of rain 40 percent.

Tonight: Mostly cloudy with scattered showers. Lows 63 to 70 near the shore to 55 to 63 near 3000 feet. East winds 10 to 15 mph. Chance of rain 50 percent.

Wednesday: Partly sunny. Isolated showers in the morning, then scattered showers in the afternoon. Highs 64 to 84. East winds 10 to 15 mph. Chance of rain 40 percent.

South Big Island

Today: Mostly sunny in the morning, then partly sunny with isolated showers in the afternoon. Highs around 85 near the shore to around 67 near 5000 feet. East winds up to 15 mph. Chance of rain 20 percent.

Tonight: Partly cloudy. Isolated showers in the evening. Lows around 73 near the shore to around 54 near 5000 feet. East winds 10 to 15 mph. Chance of rain 20 percent.

Wednesday: Mostly sunny in the morning, then partly sunny with isolated showers in the afternoon. Highs around 84 near the shore to around 66 near 5000 feet. East winds 10 to 15 mph. Chance of rain 20 percent.

Puna

Today: Partly sunny with scattered showers. Highs 78 to 85 near the shore to 64 to 71 at 4000 feet. North winds up to 15 mph shifting to the northeast in the afternoon. Chance of rain 40 percent.

Tonight: Mostly cloudy with scattered showers. Lows 63 to 72 near the shore to 53 to 58 at 4000 feet. North winds up to 15 mph. Chance of rain 50 percent.

Wednesday: Partly sunny with scattered showers. Highs 78 to 85 near the shore to 64 to 71 at 4000 feet. Northeast winds 10 to 15 mph decreasing to up to 15 mph in the afternoon. Chance of rain 40 percent.

Waikoloa

Today: Mostly sunny. Highs 83 to 89 near the shore to 67 to 73 above 4000 feet. North winds up to 15 mph.

Tonight: Partly cloudy. Lows around 73 near the shore to 50 to 56 above 4000 feet. East winds up to 10 mph.

Wednesday: Mostly sunny in the morning then becoming partly sunny. Highs 83 to 90 near the shore to 67 to 73 above 4000 feet. North winds up to 10 mph.

Detailed Forecast

Synopsis

Relatively dry moderate trades will continue through the forecast period. Clouds and showers will remain focused over windward and mauka areas during the overnight and early morning hours through this time.

Discussion

Very little change in prevailing conditions is anticipated for the balance of the forecast period. Moderate trades will demonstrate occasional minor fluctuations in intensity while upstream moisture remains on the drier side. Current satellite analysis indicates limited moisture characterized by PWATs on the order of one inch or less extending well upstream. Global model consensus further suggests that dry air in the mid-levels will further serve to reinforce existing stability. As a result, a relatively dry trade wind pattern will support quiescent conditions for at least the next 5 to 7 days. The greatest coverage of clouds and showers will be focused over windward and mauka areas mainly overnight and in the early morning hours.

Aviation

A weak high pressure ridge far north of the region will continue to produce moderate trade winds. Lighter large scale winds over each island will allow localized sea breezes to develop along terrain sheltered western slopes.
An upper level disturbance just northeast of the Hawaiian Islands will will help to destabilize the atmosphere and keep scattered showers in the forecast for today. Trade winds will be strong enough to favor windward and mountain areas in the overnight hours. Wind convergence between the background trade flow and the west side sea breezes may create isolated shower bands over leeward and interior sections of each island this afternoon. A few areas may briefly see MVFR conditions in moderate showers, otherwise VFR conditions will prevail.
No AIRMETs in effect and none are expected.

Marine

High pressure north of the state will keep moderate trade winds in place through the weekend, with only minor fluctuations in strength. Winds and Seas are expected to remain below Small Craft Advisory thresholds throughout the forecast period.
A series of overlapping south swells will keep south shore surf near seasonal levels through the work week, with surf dropping to slightly below normal levels over the weekend into early next week. East shore surf will remain very small during the next 7 days. Surf along north facing shores will remain nearly flat through Saturday, with a small north swell giving north shore surf a slight boost Sunday through early next week.

HFO Watches/Warnings/Advisories

None.

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Data Courtesy of NOAA.gov

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