Hawaii County climate forecast is July 09, 2021

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Photo credit: James Grenz

Hilo

Today: A few showers, especially before noon. Partly sunny with a high near 84. Calm wind blowing 5 to 9 miles per hour from the east 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. Mostly cloudy with a low of around 66. East winds 5 to 9 mph will be light and variable. The probability of precipitation is 30%. New rainfall levels of less than a tenth of an inch possible.

Saturday: A few showers. Mostly cloudy with a high near 84. Light and changeable wind blowing from 5 to 9 miles per hour from the east in the afternoon. 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. East winds 6 to 9 miles per hour turning west-southwest in the morning. 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 around 65. Northwest winds 6 to 10 mph in the evening from the east. The probability of precipitation is 30%. New rainfall levels of less than a tenth of an inch possible.

THE ARTICLE CONTINUES BELOW THE ADVERT

Saturday: A few showers after noon. Partly sunny with a high near 80. East winds 6 to 10 miles per hour turning west-northwest in the morning. The probability of precipitation 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. Partly sunny, peaking near 79. Breezes, with northeasterly winds of 14 to 25 mph, with gusts of up to 37 mph. 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 minimum of around 58. Northeast winds from 10 to 23 km / h, with gusts of up to 30 km / h. The probability of precipitation is 30%. New levels of precipitation between a tenth and a quarter of an inch are possible.

Saturday: A few showers. Partly sunny, with a peak near 79. Breeze, with a northeasterly wind of 10 to 30 km / h, with gusts of up to 42 km / h. The probability of precipitation is 40%. New levels of precipitation between a tenth and a quarter of an inch are possible.

Kohala

THE ARTICLE CONTINUES BELOW THE ADVERT

Today: A few showers, especially before noon. Partly sunny, with a high near 65. East winds 7-10 mph. The probability of precipitation is 30%.

Tonight: A few showers. Mostly cloudy with a minimum of about 53. Windy, with easterly winds of 10 to 25 mph, with gusts of up to 35 mph. The probability of precipitation is 40%. New rainfall levels of less than a tenth of an inch possible.

Saturday: A few showers. Mostly cloudy, with a peak near 65. Windy, with an easterly wind of 16 to 32 km / h, with gusts of up to 45 km / h. The probability of precipitation is 40%. New rainfall levels of less than a tenth of an inch possible.

Southern big island

Today: Mostly sunny, with a high of almost 85. Windy, with easterly winds of 20 to 35 km / h, with gusts of up to 45 km / h.

Tonight: A few showers. Mostly cloudy, with a low point of 74. Windy, with an east-northeast wind of 20 to 35 km / h, with gusts of up to 45 km / h. The probability of precipitation is 20%.

Saturday: individual showers. Partly sunny, with a high near 85. Windy, with an easterly wind of 18 to 24 mph, with gusts of up to 50 mph. The probability of precipitation is 20%.

Feedback

Today: a few showers. Partly sunny with a high near 83. West winds 6-11 mph turning east in the afternoon. The probability of precipitation is 40%. 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 winds 6 to 11 mph will be light and variable. The probability of precipitation is 50%. New rainfall levels of less than a tenth of an inch possible.

Saturday: A few showers. Mostly cloudy with a high near 83. West winds 5 to 11 miles per hour turning east in the morning. The probability of precipitation is 50%. New rainfall levels of less than a tenth of an inch possible.

Waikoloa

Today: A few showers after noon. Mostly sunny, peaking near 85. East winds 9 to 13 miles per hour turning west-northwest in the afternoon. The probability of precipitation is 20%.

Tonight: A few showers before midnight. Mostly cloudy with a low of about 66. West-northwest winds 5 to 11 mph east in the evening. The probability of precipitation is 30%. New rainfall levels of less than a tenth of an inch possible.

Saturday: A few showers after noon. Partly sunny with a high near 85. East winds 5 to 11 miles per hour turning northwest in the morning. The probability of precipitation is 30%. New rainfall levels of less than a tenth of an inch possible.

Summary

Light to moderate trade winds will continue to bring some showers to windward areas through Saturday, with local ocean breezes allowing some showers in leeward areas each afternoon. A more typical moderate to breezy trade wind pattern will return by Sunday, with showers favoring the windward and mauka areas, particularly at night and in the early morning hours, with an occasional shower from time to time reaching leeward areas.

discussion

There is currently a weak, southwest to northeast facing, low pressure valley on the surface that is nearly stationary about 300 miles north of Kauai. Meanwhile, an altitude of 1032 MB is in the far northwest of the islands and an altitude of 1024 MB is in the far northeast. Early morning trading is light to moderate across the island chain, with some local land breezes in the more sheltered void areas. Infrared satellite images show clear to partly cloudy skies with slightly more cloud cover over Kauai in most areas. Radar images show some light showers moving to windward areas, with coverage being highest over Kauai, with mostly rain-free conditions in leeward spots. The top short-term concerns revolve around trade wind trends and the likelihood of rain for the next few days.
The surface trough in the north of the islands will shift to the west in the next few days, while the high pressure in the far northeast increases and builds west towards the state. We expect the light to moderate trade wind pattern and localized leeward sea and land breezes to persist through Friday night. We should then see Saturday trade strengthen from east to west across the state, with moderate to airy trades expected for Sunday through much of the next week.
As for the rest of the weather details, the weather should be similar through Saturday, with mostly upwind showers at night and in the morning hours and some daytime heating-related showers that develop over the void areas each afternoon and then fizzle out in the evening. A transition back to more typical trade wind weather should prevail on Saturday evening and last for much of the next week, with showers favoring the windward and mauka areas, especially at night and in the early morning hours, with an occasional shower spilling over into the leeward communities From time to time.

aviation

Light to moderate eastern trades will continue for the remainder of this morning. Isolated showers will be mostly confined to the windward areas of the Big Island and Kauai, with isolated activity elsewhere. There may be brief periods of MVFR caps and visibility, but nothing is expected to be widespread.
No AIRMETs are currently in force.

marine

A weak surface in the north of the state will move west in the next few days, while a high pressure ridge is building up in the northeast of the islands. This generally maintains moderate easterly trade winds that turn slightly southeast and could intensify over the weekend. As the trough moves far northwest of the islands and the high pressure in the north narrows the gradient over the state early next week, the stronger easterly winds will return to the more typical northeastern trade flows on Sunday. The moderate to locally strong trades should then continue until the beginning of next week. Small craft advisory-level winds are likely to hit the windier areas of Maui County and the southern waters of the Big Island starting Saturday. These locally strong trades could last until the middle of next week.
The recent long-lived south wave will continue its slow decline, with south-facing bank surf remaining constant through Saturday. Stronger trade winds will intensify the short-term wind waves along many eastern locations from this weekend until the beginning of next week. A storm passing east of New Zealand sends the next noticeable swell north within Hawaii’s southern wave window. These longer-term south swells could arrive by the end of next week to add to the southerly surf.

HFO watches / warnings / notices

None.

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Data courtesy of NOAA.gov

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