Hawaii County climate forecast is Might 29, 2021

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Photo credit: James Grenz

Hilo

Today: individual showers before 1 p.m. Mostly sunny, with a high near 84. Light and changeable winds blowing from east-southeast at 5 to 9 miles per hour in the afternoon. The probability of precipitation is 20%.

Tonight: A few showers after 7 p.m. Mostly cloudy with a low of about 64. Southeasterly winds 5 to 11 mph will be light and variable. The probability of precipitation is 20%.

Sunday: single showers. Mostly sunny with a high near 85. West-southwest winds 5 to 10 mph turning east-southeast in the afternoon. The probability of precipitation is 20%.

Kona

Today: single showers. Partly sunny, peaking near 80. Light westerly wind blowing 5 to 10 miles per hour from west-northwest in the morning. The probability of precipitation is 20%.

Tonight: A few showers, mostly between 7pm and 1am. Mostly cloudy with a low of about 63. Northwest winds 5 to 10 mph that become light and changeable after midnight. The probability of precipitation is 30%. New rainfall levels of less than a tenth of an inch possible.

THE ARTICLE CONTINUES BELOW THE ADVERT

Sunday: individual showers before 7 a.m., then individual showers after 1 p.m. Partly sunny, with a peak near 80. Calm wind that blows in the afternoon at a speed of 10 km / h from west-southwest. The probability of precipitation is 20%.

Waimea

THE ARTICLE CONTINUES BELOW THE ADVERT

Today: A few showers, especially after noon. Partly sunny, peaking near 79. Northeast winds 5 to 10 miles per hour turning west-southwest 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 minimum of around 56. West-southwest winds 5 to 11 mph will be calm. The probability of precipitation is 30%. New rainfall levels of less than a tenth of an inch possible.

Sunday: A few showers after noon. Mostly sunny, with a peak near 79. Calm wind with a speed of 5 to 11 km / h from the west. The probability of precipitation is 30%. New rainfall levels of less than a tenth of an inch possible.

Kohala

THE ARTICLE CONTINUES BELOW THE ADVERT

Today: A few showers, especially after noon. Partly sunny, with a peak near 65. Calm wind from the southwest at about 8 km / h. The probability of precipitation is 30%.

Tonight: A few showers before midnight. Partly cloudy, with a low of about 51. East-northeast wind at about 8 km / h, which becomes calm after midnight. The probability of precipitation is 30%.

Sunday: A few showers after noon. Partly sunny, with a peak near 65. Calm wind from the southwest at about 8 km / h. The probability of precipitation is 30%.

Southern big island

Today: A few showers after noon. Mostly sunny, peaking near 85. Breezes, with east-northeast winds of 13 to 20 mph, with gusts of up to 40 mph. The probability of precipitation is 20%.

Tonight: A few showers. Partly cloudy, with a minimum of about 72. Windy, with an east-northeast wind of 11 to 24 km / h. The probability of precipitation is 20%.

Sunday: single showers. Mostly sunny, with a high near 85. Windy, with easterly winds of 10 to 25 miles per hour. The probability of precipitation is 20%.

Feedback

Today: single showers. Partly sunny with a high near 83. Light and changeable wind blowing from the southeast at 5 to 10 miles per hour in the afternoon. The probability of precipitation is 20%.

Tonight: A few showers. Mostly cloudy, with a low of about 62. East-southeast winds 6 to 9 mph. The probability of precipitation is 20%.

Sunday: single showers. Mostly sunny, with a high near 84th breeze, with a south wind of 7 to 25 mph. The probability of precipitation is 20%.

Waikoloa

Today: A few showers after noon. Mostly sunny, with a high near 85. Light and changeable wind blowing from west-northwest 5 to 10 miles per hour in the afternoon. The probability of precipitation is 20%.

Tonight: A few showers before midnight. Mostly cloudy with a low of about 64. West winds 5 to 9 mph will be light and variable. The probability of precipitation is 20%.

Sunday: A few showers after noon. Partly sunny, with a high near 85. Calm northwest wind at 5 to 9 miles per hour. The probability of precipitation is 20%.

Summary

A passing cold front system far north of the Hawaiian Islands will weaken the high pressure ridge north of the state and create light and variable winds during Memorial Day weekend. Persistently warm temperatures and damp trends are expected every day. Stable atmospheric conditions at altitude will limit cloud and shower activity. During the day, the sea breeze on land creates some inner clouds with only a few showers, which favor the island mountains and the inner sections from afternoon to evening. Overnight, the land breezes will clear most of the island’s cloud cover. The high pressure ridge north of the islands will build up from Tuesday, although the weather with moderate to locally breezy trade winds is expected to continue into next weekend.

discussion

Satellite imagery from this morning shows a cold front system passing north of the Hawaiian Islands, a narrow upper plain and a faint subtropical jet persisting south of the region. Radar images show clouds and showers near Kona on the west side of the Big Island.
The subtropical ridge north of the islands will collapse as a low-pressure frontal system slowly moves through the north-central Pacific over the next three days. Trade winds will decrease overnight, creating a light and variable wind pattern over the region. In the absence of widespread winds, the islands’ heating and cooling in relation to ocean temperatures during Memorial Day weekend will create local land and sea breezes. A ridge on the upper level will create extensive subsidence that will stabilize the atmosphere over the region. Settlement inversion heights range from 5,000 to 8,000 feet and limit cloud and shower development during this light wind pattern. The humidity tends to be higher due to the lack of trade winds. The weather conditions this holiday weekend will be excellent for outdoor activities!
The weather conditions will change again from Tuesday to moderate to locally breezy trade winds, as the subtropical ridge in the north of the Hawaiian Islands is forming again. Humidity will decrease as drier air enters the area. Clouds and short rain showers favor windward and mountainous areas on every island with higher tendencies during the night until the early hours of the morning.

aviation

A weak surface ridge a few hundred miles north of the islands will shift south if it is further weakened. The weak background current will turn from east-northeast to east-southeast over the next 24 hours. This will lead to an increase in afternoon sea breezes and late evening land breezes over the weekend.
The afternoon sea breeze will focus shallow accumulations of cumulus over the island’s interior. The air mass remains largely dry and largely stable, so that the associated shower activity remains minimal. The sea breeze will give way to the land breeze after sunset and encourage nightly evacuation along the leeward slopes and coasts.

marine

A front will be approaching from the northwest over the holiday weekend, bringing light and variable winds to the western islands, while light to moderate southeast winds will prevail over the eastern end of the state. The trade winds will return from east to west across the island chain on Monday night and Tuesday and will intensify to moderate and locally strong levels by the middle of next week.
A series of small south and south-southwest swells will remain near to slightly below normal surf on the south-facing banks through Wednesday. The surf on the south coast could rise slightly by the end of next week as a new south-south-west swell moves through the island chain.
Surfing along the north and west coasts will remain small today and then tend to increase from Sunday to Tuesday when a new northwest swell picks up. That swell will then trend lower from Wednesday until the end of next week.
Surfing along the east facing coastlines will remain small until Tuesday, then the trend will rise from Wednesday until the end of next week as the trades over and upstream of the islands get stronger.

HFO clocks / warnings / notices Ad

None.

Data courtesy of NOAA.gov

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