Today: Mostly cloudy. Numerous showers in the morning, then scattered showers in the afternoon. Highs around 80 near the shore to 64 to 69 at 4000 feet. Northeast winds up to 15 mph. Chance of rain 70 percent.
Tonight: Mostly cloudy. Numerous showers in the evening, then frequent showers after midnight. Lows 64 to 69 near the shore to around 54 at 4000 feet. North winds up to 10 mph. Chance of rain 80 percent.
Thursday: Mostly cloudy. Numerous showers in the morning, then scattered showers in the afternoon. Highs around 80 near the shore to 64 to 69 at 4000 feet. Northeast winds up to 15 mph increasing to 10 to 15 mph in the afternoon. Chance of rain 70 percent.
Kona
Today: Mostly sunny in the morning, then mostly cloudy with scattered showers in the afternoon. Highs 80 to 85 near the shore to around 64 near 5000 feet. Southwest winds up to 10 mph shifting to the northwest in the afternoon. Chance of rain 40 percent.
Tonight: Mostly cloudy in the evening then becoming partly cloudy. Isolated showers. Lows 69 to 74 near the shore to around 53 near 5000 feet. Light winds. Chance of rain 20 percent.
ARTICLE CONTINUES BELOW AD
ARTICLE CONTINUES BELOW AD
Thursday: Mostly sunny in the morning, then mostly cloudy with scattered showers in the afternoon. Highs 79 to 84 near the shore to around 64 near 5000 feet. West winds up to 10 mph. Chance of rain 40 percent.
Waimea
Today: Breezy. Partly sunny with scattered showers. Highs around 79 near the shore to 64 to 74 near 3000 feet. East winds 10 to 25 mph. Chance of rain 50 percent.
Tonight: Breezy. Mostly cloudy with scattered showers. Lows 63 to 69 near the shore to 54 to 61 near 3000 feet. East winds 10 to 20 mph decreasing to up to 20 mph after midnight. Chance of rain 50 percent.
Thursday: Partly sunny. Breezy. Numerous showers in the morning, then scattered showers in the afternoon. Highs around 79 near the shore to 64 to 74 near 3000 feet. East winds up to 20 mph increasing to 10 to 20 mph in the afternoon. Chance of rain 70 percent.
Kohala
Today: Breezy. Partly sunny with scattered showers. Highs around 79 near the shore to 64 to 74 near 3000 feet. East winds 10 to 25 mph. Chance of rain 50 percent.
ARTICLE CONTINUES BELOW AD
Tonight: Breezy. Mostly cloudy with scattered showers. Lows 63 to 69 near the shore to 54 to 61 near 3000 feet. East winds 10 to 20 mph decreasing to up to 20 mph after midnight. Chance of rain 50 percent.
Thursday: Partly sunny. Breezy. Numerous showers in the morning, then scattered showers in the afternoon. Highs around 79 near the shore to 64 to 74 near 3000 feet. East winds up to 20 mph increasing to 10 to 20 mph in the afternoon. Chance of rain 70 percent.
South Big Island
Today: Breezy. Sunny in the morning, then partly sunny with isolated showers in the afternoon. Highs around 82 near the shore to around 68 near 5000 feet. East winds up to 25 mph. Chance of rain 20 percent.
Tonight: Partly cloudy. Isolated showers in the evening. Lows around 70 near the shore to around 52 near 5000 feet. Northeast winds up to 15 mph. Chance of rain 20 percent.
Thursday: Breezy. Sunny in the morning, then partly sunny with isolated showers in the afternoon. Highs around 82 near the shore to around 68 near 5000 feet. East winds up to 20 mph. Chance of rain 20 percent.
Puna
ARTICLE CONTINUES BELOW AD
Today: Mostly cloudy. Numerous showers in the morning, then scattered showers in the afternoon. Highs around 80 near the shore to 64 to 69 at 4000 feet. Northeast winds up to 15 mph. Chance of rain 70 percent.
Tonight: Mostly cloudy. Numerous showers in the evening, then frequent showers after midnight. Lows 64 to 69 near the shore to around 54 at 4000 feet. North winds up to 10 mph. Chance of rain 80 percent.
Thursday: Mostly cloudy. Numerous showers in the morning, then scattered showers in the afternoon. Highs around 80 near the shore to 64 to 69 at 4000 feet. Northeast winds up to 15 mph increasing to 10 to 15 mph in the afternoon. Chance of rain 70 percent.
Waikoloa
Today: Breezy. Sunny with isolated showers in the morning, then partly sunny in the afternoon. Highs around 84 near the shore to 65 to 71 above 4000 feet. Northeast winds up to 25 mph. Chance of rain 20 percent.
Tonight: Mostly clear. Breezy. Isolated showers in the evening. Lows around 72 near the shore to 50 to 56 above 4000 feet. Southeast winds up to 20 mph. Chance of rain 20 percent.
Thursday: Sunny in the morning then becoming partly sunny. Breezy. Highs around 83 near the shore to 65 to 71 above 4000 feet. North winds up to 20 mph.
Detailed Forecast
Synopsis
Breezy easterly trade winds will continue through Thursday, then ease Friday through early next week as the ridge weakens north of the area and an upper disturbance moves in. Showers will favor windward and mauka locations, especially overnight through the early mornings as pockets of moisture move through. As the upper disturbances moves southward into the region, there is a possibility of increasing shower coverage, with some potentially becoming locally heavy.
Discussion
Short-term guidance remains in good agreement and depicts the breezy easterly trades holding through Thursday as the ridge remains anchored to the north. An area of low clouds and enhanced moisture moving through has led to better windward shower coverage, which will continue through the early morning hours today. Stable conditions associated with an upper ridge and plenty of mid-level dry air, however, will limit rainfall amounts. Mostly dry conditions will prevail over the leeward areas of the smaller islands.
Trade winds may weaken Friday into the weekend as an upper trough drops south into the area and a weakness forms in the ridge to the north. Added instability accompanying the upper trough will support a few locally heavier showers. This trend may persist over the weekend and into early next week as a reinforcing upper trough digs southward. Forecast confidence, however, remains poor through this period due to large inconsistencies noted from cycle to cycle over the past several days.
Aviation
Moderate to locally breezy trade winds will maintain showers across mainly windward slopes and coasts, with the greatest concentration of showers expected through this morning. Local sea breezes will encourage cloud and shower development again this afternoon over the Kona coast and mountain slopes. Mainly VFR conditions are expected across TAF locations through the period. However MVFR conditions in heavier showers may generate brief periods of tempo mountain obscuration across some windward areas.
The locally breezy trade winds will continue the need for AIRMET Tango due to moderate low-level turbulence downwind of most island terrain.
Marine
A high pressure system will remain north of the Hawaiian Islands producing moderate to locally strong trade winds into Friday. A low pressure trough forming north of the islands will weaken the trade winds into the moderate range from Saturday into the first half of next week. A Small Craft Advisory remains in effect for the windier waters and channels around Maui and Hawaii Counties.
A small long period south to southwest swell (200-220 degree) will keep small surf heights along south facing shores into the weekend. Moderate trade winds will maintain small surf along east facing shores into Friday.
North and west facing shores will see nearly flat conditions into Sunday, with a small long period northwest (310 degree) swell arriving by Sunday night producing a slight bump in surf heights lasting into Monday before fading away on Tuesday.
HFO Watches/Warnings/Advisories
Small Craft Advisory until 6 PM HST Thursday for Maalaea Bay, Pailolo Channel, Alenuihaha Channel, Big Island Leeward Waters, Big Island Southeast Waters.
This comments section is a public community forum for the purpose of free expression. Although Big Island Now encourages respectful communication only, some content may be considered offensive. Please view at your own discretion. View Comments
