Hawaii County climate forecast is Might 10, 2021

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Photo credit: James Grenz

Hilo

Today: Showers likely, mostly before 1pm. Partly sunny with a high near 82. West winds 5 to 11 miles per hour turning east in the afternoon. The probability of precipitation is 60%. New rainfall levels of less than a tenth of an inch possible.

Tonight: Showers likely, mostly after 7pm. Mostly cloudy with a minimum of about 64. Calm wind blowing west at 5 to 8 miles per hour in the evening. The probability of precipitation is 70%. New rainfall levels of less than a tenth of an inch possible.

Tuesday: Showers likely, mostly before 1pm. Partly sunny with a high near 81. West winds 6 to 10 mph turning northeast 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. Mostly sunny, peaking near 83. West-northwest winds 5 to 8 miles per hour that become calm 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 before midnight. Partly cloudy, with a low of around 62. After midnight, a calm wind blows from the east at around 8 km / h. The probability of precipitation is 30%. New rainfall levels of less than a tenth of an inch possible.

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Tuesday: A few showers after noon. Mostly sunny, with a high near 83. West winds 6 to 11 mph that become light and changeable 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. Partly sunny, with a high near 76. Windy, with northeasterly winds of 17 to 23 mph, with gusts of up to 32 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 50. Windy, with east-northeast 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.

Tuesday: A few showers. Partly sunny, with a high near 75. Windy, with northeasterly winds of 18-23 mph, decreasing to 11-25 mph in the afternoon. Winds can blow up to 32 miles per hour. The probability of precipitation is 40%. New levels of precipitation between a tenth and a quarter of an inch are possible.

Kohala

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Today: a few showers. Partly sunny, with a high near 69. Windy, with east-northeast winds of 21 to 23 mph, with gusts of up to 32 mph. The probability of precipitation is 50%. New rainfall levels of less than a tenth of an inch possible.

Tonight: Showers likely. Mostly cloudy, with a minimum temperature of 39. Windy, with easterly winds of 18 to 35 km / h, with gusts of up to 50 km / h. The probability of precipitation is 60%. New rainfall levels of less than a tenth of an inch possible.

Tuesday: A few showers. Partly sunny, peaking near 69. Windy, with east-northeast winds of 19 to 24 mph, decreasing to 13 to 28 mph in the afternoon. Winds can blow up to 34 miles per hour. The probability of precipitation is 50%. 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 easterly winds of 22 to 42 mph, with gusts of up to 54 mph. The probability of precipitation is 20%.

Tonight: A few showers. Partly cloudy, with a minimum of about 72. Windy, with east-northeast winds of 21 to 24 mph, with gusts of up to 50 mph. The probability of precipitation is 20%.

Tuesday: A few showers. Mostly sunny, with a high near 84. Windy, with easterly winds of 21 to 24 mph, with gusts of up to 50 mph. The probability of precipitation is 20%.

Feedback

Today: Showers likely, mostly before noon. Mostly cloudy, with a peak near 80. North-northwest wind with a speed of 6 to 23 km / h, which comes from east-northeast in the morning. Gusts of wind can reach up to 18 miles per hour. The probability of precipitation is 60%. New levels of precipitation between a tenth and a quarter of an inch are possible.

Tonight: Showers likely. Mostly cloudy, with a low of about 59. Northeast winds 6 to 9 mph turning west-northwest after midnight. The probability of precipitation is 70%. New levels of precipitation between a tenth and a quarter of an inch are possible.

Tuesday: Showers likely, mostly before noon. Mostly cloudy, peaking near 79th breeze, with a west-northwest wind of 7 to 25 mph turning northeast in the afternoon. Gusts of wind can reach up to 21 km / h. The probability of precipitation is 60%. New levels of precipitation between a tenth and a quarter of an inch are possible.

Waikoloa

Today: A few showers after noon. Sunny, peaking near the 81st breeze, with east-northeast winds of 16 to 21 mph, with gusts of up to 45 mph. The probability of precipitation is 20%.

Tonight: A few showers before midnight. Mostly clear, with a low of around 60. Windy, with an east-southeast wind of 14 to 34 km / h, with gusts of up to 45 km / h. The probability of precipitation is 20%.

Tuesday: A few showers after noon. Sunny, with a high near 82. Windy, with east-northeast winds of 19 to 24 mph, decreasing to 10 to 11 mph in the afternoon. Winds can blow up to 34 miles per hour. The probability of precipitation is 20%.

Summary

A wide high pressure ridge north of the state is forecast to hold moderate trade winds into the weekend. Expect passing showers during the week, mostly limited to windward and mountainous areas. Upper level disruption moves into the region on Friday and may increase shower activity across the island chain by the weekend.

discussion

Not much changes in the short-term weather pattern this morning. This morning’s satellite imagery shows fairly stable clouds moving into the islands with the east trade winds. Local radar shows passing showers primarily over windward and mountainous areas, with some bands of showers developing along the leeward side of the island convergence plumes southwest and west of each island. The water vapor images east of the Big Island show a weak upper low.
A wide high pressure ridge north of the region will maintain its strength and produce moderate trade winds until the coming weekend. The top soundings at 12Z this morning show subsidence inversion heights over Lihue Kauai of approximately 6,000 feet and approximately 9,000 feet above Hilo on the Big Island. These differences in trade wind inversion heights are related to colder temperatures near the weak upper low east of the Big Island, resulting in less stable conditions on the east side of the state. The forecasts show that the cooler temperatures at high altitudes (500MB level) northeast of the Hawaiian Islands will last all week, with the forecast predicting wind and mountain showers.

aviation

The moderate easterly trade winds will continue across the state today and for the next few days. As a result, throughout the forecast period, streaks of isolated showers and clouds will generally favor the northern and eastern sections of the islands as they are carried by the trade winds.
In the early morning, AIRMET Sierra remains in effect to darken the eastern sections of the Big Island, where latest radar and satellite imagery shows that most of the showers and clouds were in focus for much of the night. However, models suggest that some improvement may occur later in the morning. Otherwise, VFR conditions are expected today with only short MVFR conditions with passing showers.

marine

The surface high pressure in the far northeast of the state will maintain moderate to locally strong trade winds this week. A Small Craft Advisory (SCA) is now in effect through early Tuesday morning for all normally windier waters near the islands of Maui County and the Big Island. This SCA may need to be extended for the same waters from Tuesday through mid-week based on the latest forecast.
The current moderate northwest swell will gradually subside from today through Wednesday. The surf is likely to become almost flat on most north facing coastlines from Thursday through next weekend. The current south swell will keep surfing heights along the south-facing coasts near the May average through Tuesday. A new small, long south swell arriving on Wednesday is expected to last through Friday. The moderate trade winds near and upstream of the islands are likely to generate surfing heights near or slightly below the May average on the east-facing coastlines this week.

HFO clocks / warnings / notices Ad

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

Data courtesy of NOAA.gov

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