Hawaii County climate forecast is Might 15, 2021

Hilo

Today: Showers likely, mostly before 1pm. Partly sunny with a high near 78. West-southwest winds 5 to 24 mph turning north-northeast in the afternoon. Gusts of wind can reach up to 18 miles per hour. The probability of precipitation is 60%. New rainfall levels of less than a tenth of an inch possible.

Tonight: Showers likely, mostly after 1am. Mostly cloudy, with a low of around 65. North-northwest winds 8 to 23 km / h, with gusts of up to 30 km / h. The probability of precipitation is 70%. New rainfall levels of less than a tenth of an inch possible.

Sunday: Showers likely, mostly before 1pm. Mostly cloudy, with a high near 79. North winds around 8 mph. The probability of precipitation is 70%. New rainfall levels of less than a tenth of an inch possible.

Kona

Today: A few showers after noon. Mostly sunny with a high near 78. East winds at 8 mph turning west-northwest in the afternoon. 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 64. East winds 3 to 5 mph. The probability of precipitation is 40%. New rainfall levels of less than a tenth of an inch possible.

THE ARTICLE CONTINUES BELOW THE ADVERT

Sunday: A few showers after noon. Mostly sunny, with a peak near 78. Light and changeable wind. The probability of precipitation is 20%.

Waimea

THE ARTICLE CONTINUES BELOW THE ADVERT

Today: a few showers. Partly sunny, with a peak near 71. Breeze, with an east-northeast wind of 14 to 32 km / h, with gusts of up to 45 km / h. The probability of precipitation is 40%. New levels of precipitation between a tenth and a quarter of an inch are possible.

Tonight: A few showers. Mostly cloudy with a low of around 54. East winds 11 to 24 mph, with gusts up to 18 mph. 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 72. East-northeast winds 11 to 24 mph, with gusts up to 18 mph. The probability of precipitation is 40%. New rainfall levels of less than a tenth of an inch possible.

Kohala

THE ARTICLE CONTINUES BELOW THE ADVERT

Today: Showers likely, mainly after noon. Partly sunny, with a high near 64. Windy, with east-northeast winds of 16 to 23 mph, with gusts of up to 32 mph. The probability of precipitation is 60%. New rainfall levels of less than a tenth of an inch possible.

Tonight: Showers likely. Mostly cloudy with a low of about 53rd breezes, with east-northeast winds of 16 to 20 mph, with gusts of up to 45 mph. The probability of precipitation is 60%. New rainfall levels of less than a tenth of an inch possible.

Sunday: Showers likely, mostly before noon. Partly sunny, with a peak near 65. Breeze, with an east-northeast wind of 17 to 35 km / h, with gusts of up to 50 km / h. The probability of precipitation is 60%. New rainfall levels of less than a tenth of an inch possible.

Southern big island

Today: Sunny, with a peak near 81. Windy, with east winds of 22 to 24 mph, with gusts of up to 50 km / h.

Tonight: A few showers after midnight. Partly cloudy, with a minimum of about 70. Breezes, with east-northeast winds of 15 to 27 mph, with gusts of up to 35 mph. The probability of precipitation is 20%.

Sunday: A few showers before noon. Mostly sunny, with a high near 81. Windy, with an easterly wind around 18 mph, with gusts of up to 23 mph. The probability of precipitation is 20%.

Feedback

Today: Showers likely, mostly before noon. Partly sunny, with a peak near 74. Breeze, with a north-northeast wind of 8 to 30 km / h, with gusts of up to 40 km / h. The probability of precipitation is 70%. New rainfall levels of less than a tenth of an inch possible.

Tonight: Occasional showers, mostly after midnight. Low around 61. Windy, with a north wind around 24 km / h, with gusts up to 34 km / h. The probability of precipitation is 80%. New levels of precipitation between a tenth and a quarter of an inch are possible.

Sunday: Occasional showers, mostly before noon. High near 74. Windy, with a north wind around 24 km / h, with gusts of up to 34 km / h. The probability of precipitation is 80%. New levels of precipitation between a tenth and a quarter of an inch are possible.

Waikoloa

Today: A few showers after noon. Sunny, with a high near the 81st breeze, with a north-northeast wind of 9 to 27 mph, with gusts of up to 24 mph. The probability of precipitation is 20%.

Tonight: Mostly clear with a low of around 62. East winds 7 to 9 mph.

Sunday: Sunny, with a high near 81. North-northeast winds 5 to 7 mph.

Summary

The breezy northeast trade winds will turn in a more easterly direction on Monday and then persist until the middle of the week. Rain showers will favor windward and mountainous locations, especially at night and early in the morning.

discussion

Overall, the forecast remains on track. Lowered the PoPs over the Big Island for this morning based on satellite data showing fewer clouds than originally expected. Also threw PoPs back a little across the country for Sunday and Sunday evening. Originally, the PoPs had been reinforced for the expected shortwave, but subsequent model runs continued to show relatively dry air mass overhead, which will help limit rain activity.
High pressure in the northeast remains our predominant weather characteristic and brings breezy northeast trade to the islands. A front far north of the islands will push east, helping to push the high south in the first part of the new work week. This will help move the trades a little more eastward. With greater range, the models show that the associated ridge will sink closer to the islands towards the end of the new week, which could weaken the wind. In the meantime, the moderate to locally airy trades can be expected to continue.
An upper low in the northeast of the islands remains almost stationary but is expected to begin lifting northeast tomorrow. In the meantime, the models still indicate a weak short wave that swings through the islands from the north. However, as the more recent model runs have shown, it doesn’t look like the shortwave will have much of an impact as the upper low has moved away from the islands by this time, combined with the drier air mass over the islands.

aviation

Breezy trade winds from the northeast are expected to remain in place across the state this weekend. This will allow rain showers and periods with MVFR caps and visibilities from north to east to favor the islands, especially during the night and early morning hours. Early in the morning, improving weather conditions for the Big Island on windward allowed the AIRMET Sierra to be canceled, but mountain darkening could become an issue again later this morning. Otherwise, the VFR conditions are expected to prevail throughout the forecast period.
AIRMET Tango will remain in effect for low level mechanical turbulence downwind of the mountainous terrain of all islands, and this AIRMET will likely be needed at least tonight as the breezy trade winds persist.

marine

High pressure north of the area will sustain locally strong trade winds for the coming week. A Small Craft Advisory (SCA) will remain in effect for the windy waters around Maui County and the Big Island until Sunday afternoon. The SCA is expected to be extended.
Surfing will remain below the High Surf Advisory Thresholds on all shores for the coming week. Surfing along the south-facing coasts remains increased to this day, decreasing Sunday and Monday and then staying small for the rest of the week.
The surf will remain fairly light on the north-facing banks over the weekend. A small north-north-northwest swell that arrives Sunday night will peak on Monday and then subside by Tuesday. A small west-northwest swell will peak on Wednesday and then subside by Thursday.
The trade winds will create choppy surf on the east-facing banks in the coming week. The wave heights could build up a bit at the beginning of next week if the trade winds get longer.

HFO clocks / warnings / notices Ad

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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