Hawaii County climate forecast is July 27, 2021

Hilo

Today: Showers likely, mostly before noon. Mostly cloudy, with a peak near 82. Light and changeable wind with a speed of 10 km / h from the northeast. The probability of precipitation is 70%. New rainfall levels of less than a tenth of an inch possible.

Tonight: Showers likely. Cloudy, with a minimum of about 70. West-northwest wind with about 8 km / h, which becomes calm in the evening. The probability of precipitation is 70%. New rainfall levels of less than a tenth of an inch possible.

Wednesday: Showers likely, mostly before noon. Mostly cloudy with a high near 81. Northeasterly winds 5 to 8 mph that become calm in the afternoon. 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. Partly sunny, with a high near 81. Light and changeable winds blowing from west-southwest 5 to 10 miles per hour in the mornings. The probability of precipitation is 30%. New rainfall levels of less than a tenth of an inch possible.

Tonight: A few showers before 11 p.m. Mostly cloudy, with a low of about 69. West-northwest wind with about 8 km / h, which becomes calm in the evening. The probability of precipitation is 20%.

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Wednesday: A few showers after noon. Partly sunny, with a high near 81. West-southwest winds 5 to 10 mph that become light and variable in the afternoon. The probability of precipitation is 30%. New rainfall levels of less than a tenth of an inch possible.

Waimea

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Today: A few showers, especially before noon. Mostly cloudy, peaking near 75. Breezes, with northeasterly winds of 18 to 21 mph, with gusts of up to 45 mph. 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 minimum of about 61. Windy, with east-northeast winds of 15 to 20 mph, with gusts of up to 45 mph. The probability of precipitation is 40%. New levels of precipitation between a tenth and a quarter of an inch are possible.

Wednesday: A few showers, mostly before noon. Mostly cloudy, peaking near 75. Breezes, with northeasterly winds of 17 to 21 mph, with gusts of up to 45 mph. The probability of precipitation is 40%. New rainfall levels of less than a tenth of an inch possible.

Kohala

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Today: Showers likely, mostly before noon. Cloudy, with a peak near 68. Breeze, with an east-northeast wind around 34 km / h, with gusts of up to 45 km / h. The probability of precipitation is 70%. New rainfall levels of less than a tenth of an inch possible.

Tonight: Showers likely. Cloudy, with a minimum of about 59. Breeze, with an easterly wind of 16 to 32 km / h, with gusts of up to 45 km / h. The probability of precipitation is 70%. New rainfall levels of less than a tenth of an inch possible.

Wednesday: Showers likely, mostly before noon. Cloudy, with a height of almost 69. breeze, with an east-northeast wind of 18 to 34 km / h, with gusts of up to 45 km / h. The probability of precipitation is 70%. New rainfall levels of less than a tenth of an inch possible.

Southern big island

Today: Mostly sunny, with a peak near 85. Windy, with easterly winds of 22 to 42 km / h, with gusts of up to 54 km / h.

Tonight: Partly cloudy, with a minimum of about 75. Windy, with an easterly wind of 21-25 mph, with gusts of up to 32 mph.

Wednesday: Mostly sunny, with a peak near 85. Windy, with easterly winds of 23 to 42 km / h, with gusts of up to 54 km / h.

feedback

Today: Showers likely, mostly before noon. Cloudy with a high near 78. North-northwest winds 7-11 mph turning northeast in the afternoon. The probability of precipitation is 70%. New rainfall levels of less than a tenth of an inch possible.

Tonight: Showers likely. Cloudy with a low of about 67. North-northeast winds 6 to 10 mph in the evening from the northwest. The probability of precipitation is 70%. New levels of precipitation between a tenth and a quarter of an inch are possible.

Wednesday: Showers likely, mostly before noon. Cloudy with a high near 78. North-northwest winds 6 to 24 mph blowing from the northeast in the morning. Gusts of wind can reach up to 18 miles per hour. The probability of precipitation is 70%. New rainfall levels of less than a tenth of an inch possible.

Waikoloa

Today: Mostly sunny, with a high near 84. East-southeast winds 8 to 13 mph turning north-northeast in the afternoon.

Tonight: Mostly clear with a low of about 69. North-northeast winds at 6 to 9 mph turning east-southeast in the evening.

Wednesday: Mostly sunny, with a high near 84th breeze, with northeasterly winds of 16 to 21 mph, turning slightly east-northeast in the afternoon. Gusts of wind can reach up to 29 km / h.

summary

The moderate to stormy easterly trade winds will last until midweek and then get stronger on Thursday until the weekend. Clouds and showers will favor windward and mauka locations, especially overnight until morning. Areas of tropical moisture moving from east to west, combined with an upper trough near the northwest, can periodically increase shower cover and intensity. As trades pick up later in the week, some of these showers can carry over to our dry leeward areas. Dryer trade wind conditions are expected to return this weekend.

discussion

The guidance remains stubborn and continues to advertise plenty of tropical moisture moving from east to west through the islands in the second half of the week. This moisture, combined with an upper trough lurking nearby in the northwest, will increase the likelihood of rainfall, especially for the typical windward and mauka locations every day. Some of the showers can get locally heavy at times and spill over to our dry lee areas later in the week when the trades get locally windy.
For the coming weekend, rising heights and drier trade wind conditions will limit the probability and accumulation of precipitation, even in windward areas.

aviation

Moderate to occasionally breezy east-northeast passages will drive showers over windward coasts and slopes during the forecast period, especially along northeastern parts of the Big Island. Periods with MVFR caps and visibility will likely accompany this activity. Isolated showers are to be expected elsewhere. Expect VFR to dominate most of the terminals.
AIRMET TANGO remains in effect for areas below 8,000 feet above and immediately south to west of mountains for tempo-wise turbulence.
AIRMET SIERRA remains in effect for north-east portions of the Big Island and Maui above 2000 feet to darken the mountains with clouds and showers and is likely to continue to this day.

marine

A high-pressure system moving north of the region will keep fresh to locally strong trade winds in the weather forecast until Wednesday, then wind speeds will increase from Thursday into the weekend. A Small Craft Advisory (SCA) will remain in effect through Wednesday for the normally windier waters and canals near Maui County and the Big Island. This SCA can be expanded in coverage on Thursday and Friday.
The moderate, rough surf along the east-facing coast will slowly tend a little lower through Wednesday as a surface ridge reduces the fetch length of the trade winds upstream of the Hawaiian Islands. On Thursday and Friday there will be a slight increase in trade wind swells and surges on the east-facing banks, as a high pressure system is building up in the north to northeast of the region.
A mix of smaller south and south-east swells will keep the surf along the exposed south coast into the weekend.
A small west-northwest wave originating from tropical cyclones in the northwest Pacific can arrive along some exposed west and north coasts starting Thursday or Friday. There may be a slight rise in surf heights along the north and west coasts, up to the range of 1 to 3 feet.

HFO watches / warnings / notices

Small Craft Advisory until Wednesday 6:00 p.m. HST for Maalaea Bay, Pailolo Channel, Alenuihaha Channel, Big Island Leeward Waters, Big Island Southeast Waters.

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Data courtesy of NOAA.gov

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