Hawaii County climate forecast is April 26, 2021

Hilo

Today: a few showers. Partly sunny with a high near 83. West winds 5 to 11 mph turning 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 before 7pm. Partly cloudy, with a low of about 63. Southwest wind with about 10 km / h, which becomes calm after midnight. The probability of precipitation is 30%. New rainfall levels of less than a tenth of an inch possible.

Tuesday: A few showers, mostly after 1 p.m. Mostly sunny, peaking near 83. Calm wind blowing between 5 and 7 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 from 1 p.m. Mostly sunny, with a high near 83. Light and changeable wind blowing 5 to 10 miles per hour from the west 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, mostly before 7pm. Partly cloudy, with a low of around 63. Light east wind. The probability of precipitation is 30%. New rainfall levels of less than a tenth of an inch possible.

THE ARTICLE CONTINUES BELOW THE ADVERT

Tuesday: individual showers before 7 a.m., then isolated showers after 1 p.m. Mostly sunny, with a high near 83. Calm wind blowing west between 5 and 7 miles per hour in the morning. The probability of precipitation is 30%. New rainfall levels of less than a tenth of an inch possible.

Waimea

THE ARTICLE CONTINUES BELOW THE ADVERT

Today: A few showers, especially after noon. Mostly sunny with a high near 75. Northeasterly winds 5 to 8 mph will be calm. The probability of precipitation is 40%. 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 about 52. West-southwest wind at about 8 km / h, which becomes light and variable. The probability of precipitation is 30%. New rainfall levels of less than a tenth of an inch possible.

Tuesday: A few showers, mainly after noon. Mostly sunny with a high near 75. Southeasterly winds 5 to 9 miles per hour turning northwest in the morning. The probability of precipitation is 40%. New rainfall levels of less than a tenth of an inch possible.

Kohala

THE ARTICLE CONTINUES BELOW THE ADVERT

Today: a few showers. Partly sunny with highs near 67. East winds 5 to 8 miles per hour will be calm. The probability of precipitation is 40%. 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 44. West-southwest wind with about 10 km / h, in the evening it gets calm. The probability of precipitation is 40%. New rainfall levels of less than a tenth of an inch possible.

Tuesday: Showers likely, mostly after noon. Partly sunny, peaking near 67. Calm wind blowing north-northwest 5 to 9 miles per hour in the afternoon. The probability of precipitation is 60%. New rainfall levels of less than a tenth of an inch possible.

Southern big island

Today: Sunny, with a high near 83. Windy, with east-northeast winds of 15 to 20 mph, with gusts of up to 40 mph.

Tonight: A few showers. Partly cloudy, with a low of about 69. Windy, with an easterly wind of 7 to 24 km / h, which turns from the north in the evening. Gusts of wind can reach up to 18 miles per hour. The probability of precipitation is 20%.

Tuesday: Sunny, with highs near 83. easterly southeast winds 5 to 9 mph becoming calm in the afternoon.

Feedback

Today: a few showers. Partly sunny with a high near 81. West winds 6 to 24 miles per hour turning east in the morning. Gusts of wind can reach up to 18 miles per hour. The probability of precipitation is 30%. New rainfall levels of less than a tenth of an inch possible.

Tonight: A few showers. Partly cloudy with a low of about 61. South-southeast winds 6 to 9 mph in the evening from the west. The probability of precipitation is 20%.

Tuesday: A few showers, mainly after noon. Mostly sunny with a high near 81. West winds 5 to 11 miles per hour turning east in the morning. The probability of precipitation is 30%. New rainfall levels of less than a tenth of an inch possible.

Waikoloa

Today: A few showers after noon. Mostly sunny, with a high near 81. East-southeast winds 5 to 10 mph that becomes light and variable. The probability of precipitation is 30%. New rainfall levels of less than a tenth of an inch possible.

Tonight: A few showers after midnight. Partly cloudy, with a low of about 62. West-southwest wind with about 10 km / h will be calm. The probability of precipitation is 20%.

Tuesday: A few showers after noon. Mostly sunny, peaking near 81. Light and changeable winds blowing from west-northwest between 8 and 21 miles per hour in the afternoon. The probability of precipitation is 30%. New rainfall levels of less than a tenth of an inch possible.

Summary

The winds today will switch from trade winds to a light and variable wind pattern. Light, widespread winds allow local land and sea breezes to develop in the middle of the week. Clouds will form over the island’s mountains and inland every day, with some showers in the afternoon until the wee hours of the morning through Wednesday. The trade winds will return from Thursday through the weekend, with clouds and showers receding into typical windward and mountainous areas.

discussion

This morning’s satellite images show an upper low south of the main Hawaiian islands. A subtropical jet stream south of this upper low creates high cirrus clouds over much of the state. Stable deep clouds move through the waning trade winds with a few showers over the windward and mountain areas in the early morning hours. A weakening cold front about 600 miles northwest of Kauai will approach the islands from the northwest, breaking the high pressure ridges north of the islands and disrupting the trade wind flow.
A light and variable wind regime continues in the first half of the week. Warm days and cool nights will develop across the islands, along with sea breezes during the day and downhill land breezes at night. The warming of the islands and converging sea breezes will create clouds over the island’s mountains and inland as the day progresses. These areas may experience some showers every afternoon and early evening through Wednesday.
A weakening cold front will slowly approach the islands from a north-westerly direction in the first half of the week. The forecasting aids continue to indicate that prefrontal shower bands are developing over the state on Tuesday and Wednesday as the frontline penetrates the state. Global model solutions continue to have problems with how far the front will move to the east relative to the islands. The latest model solutions bring the dissolving frontal cloud band to Maui late Wednesday through Thursday. In any case, changeable weather periods can be expected from Tuesday to Thursday.
A migratory high moving west to east across the Central Pacific Basin will allow the trade winds to return from Thursday through the weekend. Residual showers from the now dissolved frontal band will then drift back over the islands in the trade winds on Thursday and Friday. Rain showers will favor windward and mountain slopes at night until the early hours of the morning.

aviation

An approaching front will further facilitate trade this morning, with sea breezes spreading across the country this afternoon. Some showers will affect the windward slopes and coasts this morning before moving to the inland and mountainous areas this afternoon and tonight. The approaching front combined with a disturbance at high altitude could bring some showers over large parts of the island chain tonight.
AIRMET Tango will remain in effect during moderate upper turbulence and will likely last most of the day.

marine

The trade winds will continue to weaken and turn further south today in response to an approaching front from the northwest of the island chain. The surface ridge, which is currently northeast of the state, will continue to move east and away from the islands on Tuesday and Wednesday as the debilitating front in the region dissolves. This leads to gentle, variable midweek breezes. The high pressure north of the state on Thursday will restore the trade winds. From Friday to the weekend, trade will regain its moderate to fresh strength across the board, with possibly strong local winds at SCA level through the notoriously windier eastern island channels and bays.
Surfing on all shores of the Hawaiian island will remain below the High Surf Advisory thresholds for the next few days. The north-facing bank surf will remain very low throughout the day, with only background north swell and a subsiding trade wind swell. The next noteworthy west-northwest swell will arrive tonight and Tuesday and this will be mid-range surfing by the middle of the week. Minor westerly swell may be blocked eastward from Oahu due to shadowing from Kauai on Tuesday, but as that swell turns more northwest on Wednesday and then north-northwest on Thursday, surf heights will increase along most of the north and west facing coastlines. A major northwest swell coming from a northwest Pacific storm Friday and Saturday can surf in the double digits (nominal in feet) along some north and west exposures over the weekend. This swell combined with a strengthening of trades can lead to rough weekend seas. Several small, long-lasting south-southwest swell energies from southern hemisphere storms will hit the Hawaiian south coasts mid-week. These swells will give a little boost to mid to late week surfing along many of the southern shorelines. The surf on the east coast will also stay around the spring season average throughout the day, but will decrease by mid-week as trade over and upstream of the state weakens.

HFO clocks / warnings / notices Ad

None.

Data courtesy of NOAA.gov

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