Hawaii County climate forecast is Could 01, 2021

Hilo

Today: a few showers. Partly sunny, with a peak near 84. South-westerly winds at a speed of about 10 km / h, coming in from the east in the morning. The probability of precipitation is 50%. New rainfall levels of less than a tenth of an inch possible.

Tonight: A few showers. Mostly cloudy, with a low of about 64. East-southeast wind with about 8 km / h, which becomes calm in the evening. The probability of precipitation is 50%. New rainfall levels of less than a tenth of an inch possible.

Sunday: A few showers. Partly sunny with highs near 81. Calm winds at 5 to 8 miles per hour from the east. The probability of precipitation is 50%. New rainfall levels of less than a tenth of an inch possible.

Kona

Today: A few showers after noon. Increasing clouds, with a peak near 82. Calm wind blowing in the afternoon from west-northwest at 5 to 11 km / h. The probability of precipitation is 30%. New rainfall levels of less than a tenth of an inch possible.

Tonight: A few showers before midnight. Partly cloudy, with a low of about 62. North-northeast wind with about 10 km / h, which becomes calm in the evening. The probability of precipitation is 30%. New rainfall levels of less than a tenth of an inch possible.

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Sunday: A few showers after noon. Mostly sunny, with a peak near 82. Calm wind. The probability of precipitation is 30%. New rainfall levels of less than a tenth of an inch possible.

Waimea

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Today: A few showers, especially after noon. Mostly sunny, with a peak near 76. Northeast winds 11 to 23 km / h, with gusts of up to 18 km / h. The probability of precipitation is 30%. New rainfall levels of less than a tenth of an inch possible.

Tonight: A few showers. Mostly cloudy, with a low of around 50. East winds around 23 km / h, with gusts of up to 30 km / h. The probability of precipitation is 40%. New levels of precipitation between a tenth and a quarter of an inch are possible.

Sunday: A few showers, mostly before noon. Mostly sunny, with a high near 76. East-northeast winds 10 to 13 mph. The probability of precipitation is 30%. New rainfall levels of less than a tenth of an inch possible.

Kohala

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Today: a few showers. Partly sunny, peaking near 70. Breezes, with easterly winds of 17 to 20 miles per hour, with gusts of up to 45 miles per hour. The probability of precipitation is 50%. New rainfall levels of less than a tenth of an inch possible.

Tonight: A few showers. Mostly cloudy with a minimum of about 40. Breezes, with easterly winds of 16 to 20 mph, with gusts of up to 45 mph. The probability of precipitation is 50%. New rainfall levels of less than a tenth of an inch possible.

Sunday: A few showers. Partly sunny, peaking near 69. Breezes, with an easterly wind of 14 to 25 mph, with gusts of up to 35 mph. The probability of precipitation is 50%. New rainfall levels of less than a tenth of an inch possible.

Southern big island

Today: Sunny, with a peak near 83. Windy, with an easterly wind of 24 to 42 km / h, with gusts of up to 54 km / h.

Tonight: Mostly clear with a low of about 69. Windy, with an east-northeast wind around 24 mph, with gusts up to 50 mph.

Sunday: Sunny, with a high near 83. Windy, with an easterly wind of 21 to 24 mph, with gusts of up to 50 mph.

Feedback

Today: a few showers. Partly sunny, peaking near 82. North-northwest winds 5 to 8 miles per hour turning east-northeast in the afternoon. The probability of precipitation is 50%. New rainfall levels of less than a tenth of an inch possible.

Tonight: A few showers. Mostly cloudy with a low of about 61. North-northeast wind at about 8 mph. The probability of precipitation is 50%. New rainfall levels of less than a tenth of an inch possible.

Sunday: A few showers. Partly sunny with highs near 79. East-northeast winds 7 to 10 miles per hour. The probability of precipitation is 50%. New rainfall levels of less than a tenth of an inch possible.

Waikoloa

Today: Sunny with a high near 81. East-northeast winds at 9 mph turning northwest in the afternoon.

Tonight: Sure, with a low of about 60. North winds 5 to 8 miles per hour, east in the evening.

Sunday: Sunny, with a high close to 80. North-northeast wind at 10 km / h becomes calm in the afternoon.

Summary

Windy trade winds will persist throughout the weekend and bundle clouds and showers over the windward areas. Trade will decrease early next week as an upper trough approaches from the northwest.

discussion

Trade winds have penetrated the area as the high pressure in our northeast dominates the local environmental currents. Clouds and showers associated with a zone of moisture passed west of Kauai overnight, so expect drier weather as breezy business continues for the remainder of the weekend.
Models show that an upper trough northwest of the islands will strengthen early next week. The surface pressure gradient becomes considerably weaker as the associated front approaches the islands, causing the winds to subside. This is expected to lead to a pattern of land and sea breezes, increasing the potential for increased afternoon showers over leeward and inland locations Monday and Tuesday.
The forecast uncertainty regarding the development of the upper trough will increase until the middle of next week. GFS is on the wetter side of the solution shell while ECMWF shows recurring trades as the top low moves overhead from Wednesday to Friday. This would encourage a return to wetter trades of the moderate or airy variety in the second half of next week.

aviation

Trade winds become moderate to windy throughout the state as a high pressure ridges north of the islands intensify. Showers and accompanying MVFR conditions will primarily affect upwind and mauka sections.
An AIRMET for mountain darkening remains in effect for Kauai. One for low turbulence may be needed later this morning as the trade winds increase.

marine

A late-season west-northwest swell that hit the waters of Kauai and Oahu yesterday afternoon will build up along the island chain this morning. The coastal PacIOOS buoy at Waimea reflects this swell, with the spectral peak centered around 16 seconds. This swell, combined with fresh easterly trade wind energy, will support the seas that stay near the small boat warning mark 10 feet above exposed coastal waters through Sunday. In addition to the seas, winds with indications of small boats will continue through the canal waters between Maui County and the Big Island, Maalaea Bay, and the waters around South Point through Sunday. The guidance continues to show the weakening of the back early next week as the upper trough and front approaching from the northwest. Local trades will respond and fall in the easy to medium category by Tuesday.
Surfing along exposed north and west coasts of Kauai and Oahu increased rapidly yesterday afternoon due to the arrival of the west-northwest swell in the late season. Expect this spring to peak this morning and then slowly wear off by Monday. A high surf warning has been issued for the north and west coasts of Kauai and Oahu, and today it may be approaching the recommendation threshold for the west coasts of the Big Island due to the more westerly direction. Surfing along Maui’s north coast should stay lower due to the westerly direction and much of the power is cut off from smaller islands to the west.
Surfing along the south-facing banks remains high today as a small south-south-west swell continues to pervade. A downtrend is expected from Sunday to early next week with mostly southern swell energy expected in the background.
Surfing along the east facing coasts will increase over the weekend due to fresh to heavy trade on site and upstream. A downtrend is expected early next week as trades weaken.

HFO clocks / warnings / notices Ad

High Surf Advisory until 6:00 PM HST tonight for Niihau, Kauai Leeward, Waianae Coast, Oahu North Shore, Kauai North.
Small Craft Advisory until 6:00 p.m. HST on Sunday for Maalaea Bay, Pailolo Channel, Alenuihaha Channel, Big Island Leeward Waters, Big Island Southeast Waters.

Data courtesy of NOAA.gov

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