Hawaii County climate forecast is August 29, 2021

Hilo

Today: Partly sunny with a few showers. Highs from 77 to 84 near shore to 63 to 70 at 4000 feet. In the afternoon light winds from the east will blow up to 10 miles per hour. 50 percent chance of rain.

Tonight: Mostly cloudy with a few showers. Lows of 63 to 72 near the shore at 54 to 59 at 4000 feet. Breeze. 50 percent chance of rain.

Monday: Partly sunny with a few showers. Highs from 77 to 84 near shore to 64 to 70 at 4000 feet. In the afternoon, light winds will blow from the east at about 10 miles per hour. 50 percent chance of rain.

Kona

Today: Mostly sunny in the morning, then partly sunny in the afternoon with a few showers. Altitudes around 84 near shore to 67 near 5000 feet. Breeze. Chance of rain 20 percent.

Tonight: Partly cloudy. Isolated showers in the evening. Lows of 72 near shore to 51 to 56 near 5000 feet. Breeze. Chance of rain 20 percent.

THE ARTICLE CONTINUES BELOW THE ADVERT

Monday: Sunny in the morning, mostly cloudy with a few showers in the afternoon. Highs from 82 to 87 near shore to about 67 near 5000 feet. Breeze. Chance of rain 20 percent.

Waimea

THE ARTICLE CONTINUES BELOW THE ADVERT

Today: Partly sunny. Isolated showers in the morning, then isolated showers in the afternoon. Highs 63 to 84. East winds around 10 mph. Chance of rain 50 percent.

Tonight: Mostly clear with a few showers. Lows of 63 to 70 near shore to 56 to 62 near 3000 feet. Breeze. Chance of rain 20 percent.

Monday: Mostly sunny in the mornings, then partly sunny. Isolated showers. Highs 64 to 85. Light wind. Chance of rain 20 percent.

Kohala

THE ARTICLE CONTINUES BELOW THE ADVERT

Today: Partly sunny. Isolated showers in the morning, then isolated showers in the afternoon. Highs 63 to 84. East winds around 10 mph. Chance of rain 50 percent.

Tonight: Mostly clear with a few showers. Lows of 63 to 70 near shore to 56 to 62 near 3000 feet. Breeze. Chance of rain 20 percent.

Monday: Mostly sunny in the mornings, then partly sunny. Isolated showers. Highs 64 to 85. Light wind. Chance of rain 20 percent.

Southern big island

Today: Mostly sunny. A few showers in the afternoon. Altitudes around 83 near shore to about 65 near 5000 feet. East wind up to 10 km / h. Chance of rain 20 percent.

Tonight: Mostly clear. Isolated showers in the evening. Lows of 73 near shore to about 53 near 5000 feet. Northeasterly winds of 10 to 15 miles per hour. Chance of rain 20 percent.

Monday: Mostly sunny. A few showers in the afternoon. Altitudes around 83 near shore to about 65 near 5000 feet. East wind up to 10 km / h. Chance of rain 20 percent.

feedback

Today: Partly sunny with a few showers. Highs from 77 to 84 near shore to 63 to 70 at 4000 feet. In the afternoon light winds from the east will blow up to 10 miles per hour. 50 percent chance of rain.

Tonight: Mostly cloudy with a few showers. Lows of 63 to 72 near the shore at 54 to 59 at 4000 feet. Breeze. 50 percent chance of rain.

Monday: Partly sunny with a few showers. Highs from 77 to 84 near shore to 64 to 70 at 4000 feet. In the afternoon, light winds will blow from the east at about 10 miles per hour. 50 percent chance of rain.

Waikoloa

Today: Mostly sunny. A few showers in the afternoon. Heights from 83 to 89 near shore to 66 to 71 over 4000 feet. Breeze. Chance of rain 20 percent.

Tonight: Mostly clear. Isolated showers in the evening. Lows 70 to 75 near shore to 50 to 56 above 4000 feet. Breeze. Chance of rain 20 percent.

Monday: Sunny in the morning, then partly sunny in the afternoon with a few showers. Heights from 83 to 89 near shore to 66 to 72 over 4000 feet. In the afternoon there will be light winds blowing at up to 10 miles per hour from the northwest. Chance of rain 20 percent.

summary

A surface trough east of the Big Island is causing trades to weaken today. Further weakening in trades is expected Monday through Tuesday as a surface trough runs north of the islands. The weakness of the journeys will lead to a sea breeze during the day, which in the afternoon will bring a few clouds and showers inland and in the slipstream. Stormy trade winds return to the islands in the second half of the week. Some tropical moisture can graze on the Big Island and Maui Wednesday through Thursday.

discussion

A gradual downward trend in the trade winds from weak to moderate will continue until Monday, when a light easterly wind will prevail in the background until Tuesday. This is brought about by a surface trough currently located east of the Big Island. This low point, although it will happen late north of the islands between Monday and Tuesday night, will be enough to weaken trades further. A light to moderate east-southeast wind flow follows immediately east of the trough, which will linger over the area until Wednesday morning before easing to eastern trades on Wednesday afternoon. Local trade will increase sharply on Wednesday night.
The light winds over land favor an onshore sea breeze during the day and an offshore land breeze at night. The onshore sea breeze will create some afternoon clouds and showers over the slipstream and inland of all of the islands. At night, the land breeze becomes clear for most of the day, heat-driven clouds and showers, as far as the island or near the coast. In the meantime, a slight easterly current in the background will bring some loose showers to the windward areas.
The models suggest that a surface trough originating in the ITCZ ​​southeast of the Big Island is scraping off the Big Island and possibly Maui on Wednesday afternoon and Wednesday evening with a surge in trade showers. Previous models hold the brunt of tropical moisture south of the remaining islands, although dense medium and high cloud layers mask these islands. This tropical moisture is supposed to clear Kauai on Thursday morning.
A 1029MB surface high north of the islands will generate moderate to strong airy trades in the second half of the week.
The current weather radar shows widely scattered showers that are distributed over the windward water. These showers favor the windward and mountainous areas of all islands that are exposed to this current. There are some large patches of low cloud further downwind from Maui, but adequate mixing in the day will burn these patches off before they reach these islands.

aviation

The moderate trade winds will last the rest of this morning and ease off slightly in the afternoon. So expect isolated showers to be mostly limited to windward locations. Mild instability at altitude allows for some heavier showers with short periods of MVFR caps and visibility. Otherwise mainly VFR conditions prevail elsewhere.
No AIRMETs are currently in force.

marine

A high pressure ridge far north of the state will interact with a surface trough northeast of the area. This trough will generate eastern trade winds in the background throughout the region. Local land and sea breezes will develop near the islands by Tuesday. Moderate to airy trades are likely to return late Wednesday through Thursday as the trough moves west and high pressure builds in the region.
A small swell to the south is likely to peak later today and then slowly decline by Tuesday. A series of small swells in the south and southeast will keep the south coast surf above flat levels until the end of the week.
Surf will continue to decrease along the east-facing coastlines, with near-flat conditions expected by Monday evening. Surfing along the east-facing coastlines will gradually increase over the course of this week as the trade winds pick up. No further significant swells are expected.

HFO watches / warnings / notices

None.

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Data courtesy of NOAA.gov

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