Hawaii County climate forecast is August 12, 2021

Hilo

Today: Sunny in the morning with a few showers, then partly sunny with a few showers in the afternoon. Heights from 78 to 85 near the shore to 66 to 74 at 4000 feet. In the afternoon, the north wind blows at up to 24 km / h to the northeast. Chance of rain 40 percent.

Tonight: Mostly cloudy with a few showers. Lows of 64 to 72 near shore to about 57 to 4000 feet. North winds 10 to 15 miles per hour. 50 percent chance of rain.

Friday: Partly sunny with a few showers. Heights from 78 to 84 near shore to 65 to 72 at 4000 feet. Northeasterly winds of 10 to 15 miles per hour. Chance of rain 40 percent.

Kona

Today: Mostly sunny in the morning, then partly sunny in the afternoon with a few showers. Heights from 83 to 88 near shore to about 69 near 5000 feet. West winds up to 10 km / h. 50 percent chance of rain.

Tonight: Partly cloudy. Isolated showers in the evening. Lows of 70 to 75 near shore to 51 to 56 near 5000 feet. Breeze. Chance of rain 20 percent.

THE ARTICLE CONTINUES BELOW THE ADVERT

Friday: Mostly sunny in the morning, then partly sunny in the afternoon with a few showers. Highs from 85 near shore to about 69 near 5000 feet. Breeze. Chance of rain 20 percent.

Waimea

THE ARTICLE CONTINUES BELOW THE ADVERT

Today: airy. Mostly sunny with a few showers. Maximum values ​​67 to 86. East winds with up to 32 km / h, which turn 10 to 20 km / h in the north-east in the afternoon. Chance of rain 20 percent.

Tonight: airy. Mostly cloudy with a few showers. Lows of 64 to 71 near shore to 57 to 63 near 3000 feet. East winds 10 to 20 miles per hour. Chance of rain 40 percent.

Friday: Mostly sunny in the mornings, then partly sunny. Isolated showers. Highs 66 to 85. Northeasterly winds 10 to 15 miles per hour. Chance of rain 20 percent.

Kohala

THE ARTICLE CONTINUES BELOW THE ADVERT

Today: airy. Mostly sunny with a few showers. Maximum values ​​67 to 86. East winds with up to 32 km / h, which turn 10 to 20 km / h in the north-east in the afternoon. Chance of rain 20 percent.

Tonight: airy. Mostly cloudy with a few showers. Lows of 64 to 71 near shore to 57 to 63 near 3000 feet. East winds 10 to 20 miles per hour. Chance of rain 40 percent.

Friday: Mostly sunny in the mornings, then partly sunny. Isolated showers. Highs 66 to 85. Northeasterly winds 10 to 15 miles per hour. Chance of rain 20 percent.

Southern big island

Today: Sunny in the morning, then partly sunny in the afternoon with a few showers. Heights from 85 near shore to 67 near 5000 feet. Southeasterly winds up to 15 miles per hour. 50 percent chance of rain.

Tonight: Partly cloudy. Isolated showers in the evening. Lows of 73 near shore to about 54 near 5000 feet. Northeast winds up to 15 miles per hour. Chance of rain 20 percent.

Friday: Mostly sunny. Altitudes around 84 near shore to 67 near 5000 feet. East winds 10 to 15 miles per hour.

feedback

Today: Sunny in the morning with a few showers, then partly sunny with a few showers in the afternoon. Heights from 78 to 85 near the shore to 66 to 74 at 4000 feet. In the afternoon, the north wind blows at up to 24 km / h to the northeast. Chance of rain 40 percent.

Tonight: Mostly cloudy with a few showers. Lows of 64 to 72 near shore to about 57 to 4000 feet. North winds 10 to 15 miles per hour. 50 percent chance of rain.

Friday: Partly sunny with a few showers. Heights from 78 to 84 near shore to 65 to 72 at 4000 feet. Northeasterly winds of 10 to 15 miles per hour. Chance of rain 40 percent.

Waikoloa

Today: Mostly sunny. Airy. A few showers in the afternoon. Heights from 84 to 90 near shore to 67 to 74 over 4000 feet. North winds up to 20 miles per hour. Chance of rain 20 percent.

Tonight: Partly cloudy. Airy. Lows of 74 near shore to 51 to 57 over 4000 feet. Southeasterly winds up to 20 miles per hour.

Friday: Mostly sunny. Heights from 83 to 89 near shore to 66 to 73 over 4000 feet. In the afternoon the northeast wind blows north at up to 24 km / h.

summary

High pressure in the north sustains moderate to occasionally breezy trades in the region over the weekend. As a result, clouds and showers are concentrated over the windward and mauka areas.

discussion

A surface ridge north of the islands is connected with high pressure far northeast of the islands. This will maintain a trade wind flow through the weekend. A northeast-southwest facing mid-to-high level trough is located to the west of the islands and helps bring some high clouds to Kauai and the adjacent waters. The trough of the upper level slowly rises to the north, pulling the high clouds away from the islands. High clouds pretty much cleared Oahu overnight, but linger over and near Kauai.
Expect moderate trade winds today, tomorrow and Saturday a slight increase in winds is possible. The forecast is for some weakening of trades for the early part of the new week.
Very few changes were made to the general forecasting philosophy with the morning package. The models continue to agree with high pressure in the north, which will remain the dominant feature until next week. However, some changes in the strength of the high sometimes change wind speeds. Meanwhile, clouds and showers continue to be carried on the craft. The nocturnal soundings’ water readings are 1.25-1.50 inches near the islands, which is at or just below normal. Expect slightly drier PW values ​​over the weekend, which will likely result in lower rainfall. An upward trend in PW appears to be in sight until Tuesday.

aviation

High pressure in the north of the state will hold moderate trade winds for the next 24 hours, with locally breezy and gusty conditions at some terminals from morning to late afternoon. Rather dry weather is expected across the country today, with few showers shifting to the windward slopes and coasts, and a few daytime heating-related showers that develop over the leeward stretches of the Big Island. A more typical trade wind shower pattern should return tonight, bringing scattered showers to the windward areas and from time to time sending an isolated shower to the leeward communities.
No AIRMETs are in force and are not expected today.

marine

A northeast-southwest facing surface ridge located nearly 750 nm north of Honolulu maintains moderate trade today. A new surface high pressure system will be built north of the islands when we go into the weekend. Local strong trade winds are expected to return starting Friday, with Small Craft Advisory (SCA) conditions likely to develop in the normally windier waters adjacent to the islands of Maui County and Big Island. This SCA is likely to last through Saturday for these waters. Trade is expected to weaken gradually from Sunday through early next week due to a surface valley passing in the north of the state.
The current south-southwest swell is expected to gradually subside until tonight. A small, strengthening southwest swell is expected to arrive on Friday, followed by a larger swell from the same direction on Sunday. The latter swell is likely to be long-lasting, with a peak Tuesday through Wednesday next week.
Tropical cyclone activity in the northwest Pacific has sent small, consecutive west-northwest wave energy toward the region. The current west-northwest swell is likely to trend lower until this morning. Another small, reinforcing west-northwest swell is likely to reach the Western Isles later today. A slightly larger west-northwest swell could arrive this weekend and last until Tuesday.
The surf along the east-facing coasts will continue to decrease due to the lighter trade winds locally and upstream of the islands. There may be a tiny short-lived northeast swell this weekend, but surf is likely to remain low along the east-facing coastlines until early next week.

HFO watches / warnings / notices

None.

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

Check out their Big Island Helicopter Tours today!

Data courtesy of NOAA.gov

Comments are closed.