Hawaii County climate forecast for July 11, 2021

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Photo credit: James Grenz

Hilo

Today: Showers likely, mostly before noon. Mostly cloudy with a high near 83. West winds 5 to 9 mph turning east-northeast in the afternoon. The probability of precipitation is 60%. New rainfall levels of less than a tenth of an inch possible.

Tonight: shower. Low around 65. East-northeast winds around 9 mph. The probability of precipitation is 80%. New rainfall levels of less than a tenth of an inch possible.

Monday: Showers likely. Mostly cloudy, with a high near 83. East-southeast winds around 9 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 peak near 79. South-southwest winds 3 to 8 mph. The probability of precipitation is 30%. New rainfall levels of less than a tenth of an inch possible.

Tonight: A few showers, mostly before midnight. Mostly cloudy, with a low of about 64. South-southwest wind with about 13 km / h. The probability of precipitation is 30%. New rainfall levels of less than a tenth of an inch possible.

THE ARTICLE CONTINUES BELOW THE ADVERT

Monday: A few showers after noon. Mostly sunny, with a high near 79. West winds around 9 mph. The probability of rainfall is 40%. New rainfall levels of less than a tenth of an inch possible.

Waimea

THE ARTICLE CONTINUES BELOW THE ADVERT

Today: a few showers. Mostly cloudy with a high near 78. Windy, with northeasterly winds of 24 to 42 mph, with gusts of up to 38 mph. 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 minimum of about 57. Windy, with a northeasterly wind of about 42 mph, with gusts of up to 38 mph. The probability of precipitation is 40%. New levels of precipitation between a tenth and a quarter of an inch are possible.

Monday: Showers likely, mostly after 1pm. Mostly cloudy, peaking near 78. Windy, with northeasterly winds of 21 to 42 mph, with gusts of up to 38 mph. The probability of precipitation is 60%. New amounts of precipitation between a quarter and a half inch are possible.

Kohala

THE ARTICLE CONTINUES BELOW THE ADVERT

Today: Showers likely, mostly before noon. Mostly cloudy, with a high near 64. Windy, with an east-northeast wind of 22 to 42 mph, with gusts of up to 38 mph. The probability of precipitation is 60%. New rainfall levels of less than a tenth of an inch possible.

Tonight: Showers likely. Cloudy, with a minimum of about 52. Breeze, with an east-northeast wind of about 35 km / h, with gusts of up to 50 km / h. The probability of precipitation is 70%. New rainfall levels of less than a tenth of an inch possible.

Monday: showers. High near 64. Windy, with an easterly wind at 23 mph, with gusts up to 32 mph. The probability of precipitation is 80%. New rainfall levels of less than a tenth of an inch possible.

Southern big island

Today: single showers. Mostly sunny, with a high near 84. Windy, with an easterly wind around 42 mph, with gusts up to 54 mph. The probability of precipitation is 20%.

Tonight: A few showers. Partly cloudy, with a minimum of about 73. Windy, with an easterly wind of about 42 mph, with gusts of up to 54 mph. The probability of precipitation is 20%.

Monday: A few showers, mainly after noon. Mostly sunny, with a high near 84. Windy, with an easterly wind around 42 mph, with gusts up to 54 mph. The probability of precipitation is 30%. New rainfall levels of less than a tenth of an inch possible.

Feedback

Today: Showers likely, mostly before noon. Mostly cloudy, with a high near 82. Northeasterly winds 10 to 13 mph. The probability of precipitation is 60%. New levels of precipitation between a tenth and a quarter of an inch are possible.

Tonight: shower. Low around 63. Northeasterly winds around 11 mph. The probability of precipitation is 80%. New amounts of precipitation between a quarter and a half inch are possible.

Monday: Showers likely. Mostly cloudy with highs near 82. East winds 9-11 mph. The chance of precipitation is 70%. New levels of precipitation between a tenth and a quarter of an inch are possible.

Waikoloa

Today: A few showers after noon. Mostly sunny, with a high near 84. Windy, with north-northeast winds of 18 to 42 mph, with gusts of up to 38 mph. The probability of precipitation is 20%.

Tonight: A few showers before midnight. Partly cloudy, with a minimum of around 65. Breeze, with a north-northeast wind at around 30 km / h, with gusts of up to 40 km / h. The probability of precipitation is 20%.

Monday: A few showers after noon. Mostly sunny, peaking near 84. Windy, with north winds of 8 to 28 miles per hour, with gusts of up to 40 miles per hour. The probability of precipitation is 30%. New rainfall levels of less than a tenth of an inch possible.

Summary

A high pressure ridge will persist far north of the Hawaiian Islands and produce moderate to stormy trade winds during the week. In this pattern, passing showers will favor windward and mountainous areas, with the likelihood of showers over leeward locations being less. Periods of high cirrus clouds are also expected during the week.

discussion

A high pressure ridge far north of the main Hawaiian islands will keep the weather forecast for moderate to breezy trade winds throughout the week. A narrow upper trough seen on water vapor imagery north of the state will help weaken trade wind inversion, resulting in higher shower cover. Two deep troughs will move through the islands from Monday to Thursday and add some local showers. A subtropical jet near the islands will create periods of high cirrus ice clouds during the week that enhance the colors of sunrise and sunset.
A moderate to breezy trade wind weather pattern will keep the forecast for mostly fine weather, with passing showers favoring windward and mountainous areas. The shower activity will result in higher windward locations in the night to early morning hours.
Model streamlines show a low point (700 mb), currently near 146W, approaching the islands from the east. The wind convergence on the east side of this trough should spread increased showers from the Big Island to Kauai to the west on Monday. Another weak low moves through the state on Wednesday and intensifies local shower activity into Thursday.

aviation

Locally strong trade winds combined with modest instability delivered from a nearby upper trough will result in active trade wind showers this morning, mostly over and near Kauai and Oahu. While VFR conditions will prevail, periods of MVFR VIS / CIG are expected in SHRA and AIRMET Sierra for mountain darkening is tendered for the N to E sections of these islands, but E to W clearing is expected later this morning. AIRMET Tango for low turbulence above and downstream of the terrain remains advertised for all islands.

marine

As a weak surface trough moves westward far northwest of the state, the ridge will reestablish itself from the northeast. The northern high pressure will increase in the next few days and shift to the east. This keeps the northeast-southwest pressure gradient in the local waters close enough to support moderate to fresh trade winds from the east over the next few days. Local strong trades have expanded the ongoing Small Craft Advisory both in time and space to include all waters from the Kaiwi Canal east by Monday afternoon.
The southern swell in the background will maintain a small surf along the south-facing coastlines through the middle of the week. A slight strengthening of the eastern passages in the coming days will keep short, slightly increased wind waves along many eastern positions. A series of storms traveling north and east of New Zealand will send swells north within Hawaii’s southern wave window. Those long, little south swells may arrive sometime next weekend and give the surf on the south coast a little boost.

HFO watches / warnings / notices

Small Craft Advisory until 6:00 p.m. HST Monday for all eastern waters and canals.

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Data courtesy of NOAA.gov

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