Hawaii County climate forecast is June 01, 2021

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Photo credit: James Grenz

Hilo

Today: A few showers before noon. Mostly sunny, peaking near 85. Calm wind blowing east-northeast at 5 to 9 miles per hour in the afternoon. The probability of precipitation is 20%.

Tonight: A few showers. Mostly cloudy with a low of about 66. Northeasterly winds 5 to 11 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.

Wednesday: A few showers, mostly before noon. Partly sunny with a high near 84. Light and changeable wind blowing 5 to 9 miles per hour from the northeast in the morning. The probability of precipitation is 30%. New rainfall levels of less than a tenth of an inch possible.

Kona

Today: A few showers after noon. Partly sunny, with a high near 80. Light and changeable wind blowing 5 to 9 miles per hour from west-northwest in the morning. The probability of precipitation is 20%.

Tonight: A few showers. Mostly cloudy with a low of about 65. West-northwest winds 5 to 9 mph that become light and changeable after midnight. The probability of precipitation is 20%.

THE ARTICLE CONTINUES BELOW THE ADVERT

Wednesday: A few showers after noon. Partly sunny, peaking near 80. Light and changeable winds blowing west-southwest 5 to 8 miles per hour in the afternoon. The probability of precipitation is 20%.

Waimea

THE ARTICLE CONTINUES BELOW THE ADVERT

Today: individual showers after 1 p.m. Mostly sunny, peaking near 79. Breezes, with northeasterly winds of 13 to 25 mph, with gusts of up to 35 mph. The probability of precipitation is 20%.

Tonight: A few showers, mostly after 1am. Partly cloudy, with a minimum of around 58. Breeze, with a northeasterly wind of around 30 km / h, with gusts of up to 40 km / h. The probability of precipitation is 30%. New rainfall levels of less than a tenth of an inch possible.

Wednesday: A few showers, mostly before 1 p.m. Mostly sunny, peaking near 79. Breezes, with northeasterly winds of 17 to 20 mph, with gusts of up to 45 mph. 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: single showers. Mostly sunny, peaking near 65. Breezes, with easterly winds of 11 to 25 miles per hour, with gusts of up to 35 miles per hour. The probability of precipitation is 20%.

Tonight: A few showers. Partly cloudy, with a low of around 53. Windy, with an easterly wind of 16 to 34 km / h, with gusts of up to 45 km / h. The probability of precipitation is 30%. New rainfall levels of less than a tenth of an inch possible.

Wednesday: A few showers, mostly before noon. Mostly sunny, peaking near 65. Breezes, with easterly winds of 13 to 21 mph, with gusts of up to 45 mph. The probability of precipitation is 30%. New rainfall levels of less than a tenth of an inch possible.

Southern big island

Today: A few showers before noon. Mostly sunny, with a high of almost 85. Windy, with an easterly wind of 17 to 35 km / h, with gusts of up to 45 km / h. The probability of precipitation is 20%.

Tonight: Partly cloudy, with a minimum of about 74. Windy, with an easterly wind of 20 to 23 mph, with gusts of up to 48 mph.

Wednesday: Mostly sunny, with a high near 85. Windy, with easterly winds of 18 to 23 mph, with gusts of up to 48 mph.

Feedback

Today: single showers. Partly sunny with a high near 84. Northwest winds 6-11 miles per hour blowing from east-northeast in the morning. The probability of precipitation is 20%.

Tonight: A few showers. Mostly cloudy, with a low of about 64. North winds about 10 mph. The probability of precipitation is 40%. New rainfall levels of less than a tenth of an inch possible.

Wednesday: A few showers. Partly sunny, with a peak near 83. Breeze, with a north-northeast wind of 9 to 24 km / h, with gusts of up to 32 km / h. The probability of precipitation is 40%. New rainfall levels of less than a tenth of an inch possible.

Waikoloa

Today: Mostly sunny, peaking near 85. East winds 6-14 miles per hour turning west-northwest in the morning. Gusts of wind can reach up to 18 miles per hour.

Tonight: Partly cloudy, with a minimum of about 66. Breezes, with an easterly wind of 11 to 25 mph, with gusts of up to 35 mph.

Wednesday: Mostly sunny, with a high near 85. Windy, with north-northeast winds of 6 to 25 mph, with gusts of up to 34 mph.

Summary

The trade winds will return today and will reach and hold moderate levels tonight through early next week. Until Wednesday night, the conditions are rather dry, with showers mainly limited to windward and mauka areas. The remains of an ancient front are likely to bring a significant surge in showers to Kauai and possibly Oahu from Thursday through Friday. A more typical trade wind pattern is then expected from Saturday to early next week, with showers favoring windward and mauka areas, mainly at night and in the early hours of the morning.

discussion

Currently, a weak surface is nearly stationary about 250 miles northwest of Kauai. Meanwhile, an altitude of 1025 MB is at the center 1600 miles northeast of Honolulu, with a ridge axis extending southwest to near the Garden Isle. The resulting gradient creates light and variable winds over the western islands, with light to moderate cruises over the eastern end of the state. Infrared satellite imagery shows clear to partly cloudy conditions in most areas, with slightly more cloud cover over the Big Island and windward Maui. Radar images show some light trade showers moving in windward sections of Maui and Big Island as well as along the Big Island’s lakefront. There are rain-free conditions elsewhere. The main short-term concern revolves around old frontal remnants sinking southward into the western islands from Thursday to Friday.
The front in the northwest of the state will gradually dissolve in the next few days as the high pressure north of the state becomes more dominant. This allows the trade winds to return across the island chain from east to west today and intensify to a moderate level across the country by late afternoon. The high pressure will then increase as it moves east and finally northeast from Wednesday through early next week, maintaining the moderate trade winds throughout the period with only minor fluctuations in strength.
As for the remaining weather details, dry and stable conditions will continue today, with some showers this morning near the coast and this afternoon over the interior of the island. We should see a transition to a windward and mauka focused shower pattern tonight through Wednesday night, although in the stable conditions it will be much drier than normal. Both the GFS and the ECMWF show a band of higher rainfall water values ​​associated with the remains of an ancient front sinking south and into the western islands Thursday and Thursday nights, likely leading to a notable surge in trade wind showers to Kauai and beyond possibly to Oahu. while Maui County and Big Island remain in a dry trade wind regime. The remnants of the old front can linger over Kauai until Friday before lifting northwest of the islands and placing the entire island chain in a dry trade wind pattern on Friday night. A more typical trade wind regime should set in from Saturday to early next week, with showers mostly concentrated in windward and mauka areas and an isolated shower that occasionally hits leeward communities.

aviation

Weak land breezes this morning will give way to increasing trade winds in the afternoon. Trade winds will carry ragged stratocumulus and scattered showers to the windward slopes and shores of all the islands.
For Leeward Big Island, a faint vortex is detectable on infrared satellites just offshore and can be seen directing low stratus and stratocumulus back onto west-facing slopes and coasts. Conditions are likely to last for several hours and then quickly resolve shortly after sunrise. Sea breezes and cumulus formation return inland later in the day.
The air mass over the state remains very stable with a well-defined inversion in altitude between 05 kft and 07 kft. Shower activity will remain minimal, but isolated MVFR caps are to be expected. No AIRMETs are currently in effect or are expected at this point in time.

marine

A front that washes out across the distant northern offshore waters will allow the return of the trade winds that will fill up across the island chain today from east to west. Moderate trades in the next few days will increase tonight or Wednesday morning to area-wide fresh to locally strong magnitudes due to the normally windier canals and bays.
The current northwest swell will peak during the day and peak surf along the north and west facing coasts. This swell will be almost flat from Wednesday to Friday. A series of small swells in the south will stay slightly below normal surf along the southern shoreline through the middle of the week. South coast surf could rise slightly later this week with the arrival of some overlapping slightly larger, more energetic south-southwest swells. The east-facing bank surf will remain small to this day. As trades get stronger over and upstream of the state by mid-to-end of the week, there may be a small spike in short-term wind waves along eastern exposures.

HFO watches / warnings / notices

None.

Data courtesy of NOAA.gov

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