Today: Partly sunny in the morning then becoming cloudy. Scattered showers. Highs around 80 near the shore to 65 to 70 at 4000 feet. Northeast winds up to 10 mph. Chance of rain 50 percent.
Tonight: Mostly cloudy with numerous showers. Lows 63 to 68 near the shore to around 52 at 4000 feet. Light winds. Chance of rain 70 percent.
Thursday: Mostly cloudy with scattered showers. Highs around 80 near the shore to 65 to 70 at 4000 feet. East winds up to 10 mph. Chance of rain 50 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 65 near 5000 feet. Light winds. Chance of rain 50 percent.
Tonight: Mostly cloudy with scattered showers in the evening, then partly cloudy with isolated showers after midnight. Lows 66 to 72 near the shore to around 53 near 5000 feet. Light winds. Chance of rain 50 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 80 to 85 near the shore to around 65 near 5000 feet. Light winds. Chance of rain 40 percent.
Waimea
Today: Mostly sunny with isolated showers in the morning, then mostly cloudy with scattered showers in the afternoon. Highs around 79 near the shore to 65 to 75 near 3000 feet. East winds up to 15 mph. Chance of rain 50 percent.
Tonight: Mostly cloudy with scattered showers. Lows around 65 near the shore to 53 to 60 near 3000 feet. East winds up to 10 mph. Chance of rain 50 percent.
Thursday: Partly sunny with scattered showers. Highs around 79 near the shore to 65 to 75 near 3000 feet. East winds up to 10 mph shifting to the north in the afternoon. Chance of rain 50 percent.
Kohala
Today: Mostly sunny with isolated showers in the morning, then mostly cloudy with scattered showers in the afternoon. Highs around 79 near the shore to 65 to 75 near 3000 feet. East winds up to 15 mph. Chance of rain 50 percent.
ARTICLE CONTINUES BELOW AD
Tonight: Mostly cloudy with scattered showers. Lows around 65 near the shore to 53 to 60 near 3000 feet. East winds up to 10 mph. Chance of rain 50 percent.
Thursday: Partly sunny with scattered showers. Highs around 79 near the shore to 65 to 75 near 3000 feet. East winds up to 10 mph shifting to the north in the afternoon. Chance of rain 50 percent.
South Big Island
Today: Breezy. Mostly sunny in the morning, then mostly cloudy with scattered showers in the afternoon. Highs around 83 near the shore to around 69 near 5000 feet. East winds up to 20 mph. Chance of rain 40 percent.
Tonight: Mostly cloudy with scattered showers in the evening, then partly cloudy with isolated showers after midnight. Lows around 67 near the shore to around 52 near 5000 feet. Northeast winds up to 15 mph. Chance of rain 30 percent.
Thursday: Mostly sunny in the morning, then mostly cloudy with scattered showers in the afternoon. Highs around 83 near the shore to around 69 near 5000 feet. East winds up to 15 mph shifting to the south in the afternoon. Chance of rain 40 percent.
Puna
ARTICLE CONTINUES BELOW AD
Today: Partly sunny in the morning then becoming cloudy. Scattered showers. Highs around 80 near the shore to 65 to 70 at 4000 feet. Northeast winds up to 10 mph. Chance of rain 50 percent.
Tonight: Mostly cloudy with numerous showers. Lows 63 to 68 near the shore to around 52 at 4000 feet. Light winds. Chance of rain 70 percent.
Thursday: Mostly cloudy with scattered showers. Highs around 80 near the shore to 65 to 70 at 4000 feet. East winds up to 10 mph. Chance of rain 50 percent.
Waikoloa
Today: Sunny in the morning, then mostly cloudy with isolated showers in the afternoon. Highs around 84 near the shore to 66 to 72 above 4000 feet. Northwest winds up to 15 mph. Chance of rain 20 percent.
Tonight: Partly cloudy with isolated showers. Lows 67 to 72 near the shore to 49 to 56 above 4000 feet. Light winds. Chance of rain 20 percent.
Thursday: Mostly sunny in the morning, then mostly cloudy with scattered showers in the afternoon. Highs around 84 near the shore to 66 to 72 above 4000 feet. West winds up to 10 mph. Chance of rain 40 percent.
Detailed Forecast
Synopsis
The high pressure ridge north of the Hawaiian Islands will continue to weaken and drift closer to the state as a weak cold front approaches from the north. Trade wind speeds will show a weakening trend into the moderate range today. Winds over each island will become light and variable with cooling land and warming sea breezes from Thursday through Saturday. Clouds will build over island mountain and interior sections during this period of lighter winds. Northeasterly trade winds will return from Saturday night to Sunday morning as the dissipating cold front slowly drifts into the northwestern Hawaiian Islands. Clouds and brief showers will favor windward and mountain sections as the trade winds return to all islands through the first half of next week.
Discussion
Corrected aviation section.
In the larger weather pattern as shown on satellite imagery this morning we see stable cumulus clouds moving into the islands on the weakening trade winds. An upper level subtropical jet will stream high level cirrus clouds over the islands today. These ice crystal clouds will enhance island sunrise and sunset colors. Moderate trade winds today will produce a more typical weather conditions with clouds and brief passing showers favoring the windward and mountain areas in the overnight to early morning hours.
A cold front roughly 800 miles north of Oahu will continue to slowly approach the islands over the next several days and weaken the ridge north of the state through Saturday. This means moderate trade winds today will weaken and transition to light and variable winds from Thursday through Saturday. These lighter large scale winds will allow day time island heating to produce warmer sea breezes, and night time island cooling to produce cooler land breezes. The weather pattern will also shift with the changing winds as converging sea breezes build clouds and a few showers over island mountain and interior sections during the day, while diverging land breezes will clear out most of the cloud cover a few hours after sunset. Temperature inversion heights will range from around 7,000 to 9,000 feet during this time period, supporting scattered afternoon showers over each island.
A cloud band associated with this weak cold front will begin to drift through the northwest islands of Kauai, Niihau and Oahu from Saturday night through Sunday morning. Northeasterly moderate trade winds will return as this band passes through each island. Cloud and shower trends will increase along the remnant frontal band and favoring the typical windward and mountain areas. The forward motion of this cloud band will stall as the front dissipates near Maui and the Big Island from Sunday to Monday. Moderate trade winds will continue through Tuesday as wind directions veer from a northeasterly to a more easterly direction.
Aviation
Weak surface high pressure to the northeast of the state will allow for relatively dry moderate trades to persist through this afternoon. Thus, isolated showers will mainly affect windward portions of the islands. Brief periods MVFR ceilings and visibility may occur with any of the more robust showers.
No AIRMETS are currently in effect.
Marine
A ridge of high pressure will settle east-southward during the next few days as a cold front approaches from the northwest. Moderate to locally strong trades will hold in place today, and a Small Craft Advisory is now in effect for the typically windy waters around Maui and the Big Island through 6 PM this evening. The trades will gradually ease tonight and Thursday, with winds becoming light over all waters by Friday. Light to moderate trades will begin to develop again late Saturday as the front moves into the northwest islands, with moderate trades then filling back in statewide Sunday through early next week as the decaying front shifts down the island chain.
A combination of small medium-long period south and small period southeast swells will keep small surf in place along south facing shores through early next week.
Surf along north facing shores will likely remain small through Wednesday. A small medium period north-northwest swell will build Wednesday night and Thursday, giving north shore surf a noticeable boost by late Thursday. A re-inforcing medium period north- northwest swell will arrive late Friday and Friday night, boosting north shore surf up close to advisory levels this weekend. This swell will slowly lower and become more northerly early next week.
East shore surf will gradually lower during the next couple days, with minimal surf expected Friday through early next week.
HFO Watches/Warnings/Advisories
Small Craft Advisory until 6 PM HST this evening for Maalaea Bay, Pailolo Channel, Alenuihaha Channel, Big Island Leeward Waters, Big Island Southeast Waters.
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