Hilo
Tonight: Mostly cloudy with scattered showers. Lows 65 to 71 near the shore to 52 to 58 at 4000 feet. Light winds. Chance of rain 50 percent.
Friday: Mostly sunny with isolated showers. Highs 81 to 88 near the shore to 68 to 73 at 4000 feet. East winds up to 15 mph. Chance of rain 20 percent.
Friday Night: Mostly cloudy with scattered showers. Lows 66 to 73 near the shore to 53 to 60 at 4000 feet. East winds up to 15 mph. Chance of rain 50 percent.
Then
Tonight: Mostly cloudy with scattered showers. Haze. Lows around 74 near the shore to around 53 near 5000 feet. Light winds. Chance of rain 50 percent.
Friday: Partly sunny. Haze through the day. Isolated showers in the afternoon. Highs around 87 near the shore to around 71 near 5000 feet. Southwest winds up to 10 mph shifting to the northwest in the afternoon. Chance of rain 20 percent.
Friday Night: Mostly cloudy with isolated showers in the evening, then partly cloudy after midnight. Lows around 74 near the shore to 51 to 56 near 5000 feet. North winds up to 10 mph in the evening becoming light. Chance of rain 20 percent.
Got a lot
Tonight: Mostly cloudy in the evening then becoming partly cloudy. Isolated showers. Lows 64 to 72 near the shore to 56 to 63 near 3000 feet. East winds up to 15 mph. Chance of rain 20 percent.
Friday: Mostly sunny. Breezy. Isolated showers in the morning. Highs 67 to 87. East winds up to 20 mph. Chance of rain 20 percent.
Friday Night: Mostly cloudy with scattered showers in the evening, then partly cloudy with isolated showers after midnight. Lows 65 to 72 near the shore to 57 to 64 near 3000 feet. East winds 10 to 15 mph. Chance of rain 50 percent.
Kohala
Tonight: Mostly cloudy in the evening then becoming partly cloudy. Isolated showers. Lows 64 to 72 near the shore to 56 to 63 near 3000 feet. East winds up to 15 mph. Chance of rain 20 percent.
Friday: Mostly sunny. Breezy. Isolated showers in the morning. Highs 67 to 87. East winds up to 20 mph. Chance of rain 20 percent.
Friday Night: Mostly cloudy with scattered showers in the evening, then partly cloudy with isolated showers after midnight. Lows 65 to 72 near the shore to 57 to 64 near 3000 feet. East winds 10 to 15 mph. Chance of rain 50 percent.
South Big Island
Tonight: Mostly cloudy with isolated showers in the evening, then partly cloudy after midnight. Haze through the night. Lows around 75 near the shore to around 56 near 5000 feet. Northeast winds up to 15 mph. Chance of rain 20 percent.
Friday: Mostly sunny. Breezy and haze. Highs around 88 near the shore to around 71 near 5000 feet. East winds up to 25 mph.
Friday Night: Mostly clear. Breezy. Lows around 76 near the shore to around 57 near 5000 feet. Northeast winds 10 to 20 mph.
Puna
Tonight: Mostly cloudy with scattered showers. Lows 65 to 71 near the shore to 52 to 58 at 4000 feet. Light winds. Chance of rain 50 percent.
Friday: Mostly sunny with isolated showers. Highs 81 to 88 near the shore to 68 to 73 at 4000 feet. East winds up to 15 mph. Chance of rain 20 percent.
Friday Night: Mostly cloudy with scattered showers. Lows 66 to 73 near the shore to 53 to 60 at 4000 feet. East winds up to 15 mph. Chance of rain 50 percent.
Waikoloa
Tonight: Mostly cloudy. Isolated showers in the evening, then scattered showers after midnight. Haze through the night. Lows around 75 near the shore to 53 to 58 above 4000 feet. East winds up to 10 mph. Chance of rain 50 percent.
Friday: Mostly sunny in the morning, then partly sunny with isolated showers in the afternoon. Haze through the day. Highs around 88 near the shore to 67 to 75 above 4000 feet. North winds up to 10 mph. Chance of rain 20 percent.
Friday Night: Partly cloudy. Lows around 75 near the shore to around 55 above 4000 feet. Light winds.
Synopsis
Light trades continue through tonight as a low-level trough north of the islands moves west. High pressure will build back in across the region Friday into early Sunday bringing the return of moderate to locally breezy trade winds. Another brief increase in clouds and showers will develop Sunday afternoon into Monday as another low-level trough (remnants of former Tropical Cyclone Ivo) moves westward across the islands. Stable drying trends return beyond Tuesday.
Discussion
Regional satellite imagery shows a low-level trough northeast of the islands this afternoon. This has resulted in a hybrid sea breezy pattern setting up across the state, with radar imagery showing a few showers developing over sheltered leeward locations. Guidance continues to show this trough moving west tonight which will bring a slight increase in clouds and showers over windward and mauka areas, with any lingering activity over leeward areas dissipating this evening.
By Friday, a surface ridge will build north of the Hawaiian Islands allowing moderate to locally breezy trades to return. Drier air will filter in from the east as a very stable upper- level ridge nudges its way back over the state. This will bring lower trade wind inversion heights, with clouds and showers over mainly windward and mauka areas through Sunday morning.
By Sunday afternoon, yet another disturbance will move from east to west across the islands. This trough will have slightly different island by island impacts as deeper moisture and dynamics are associated with the remnants of former Tropical Cyclone Ivo. This trough will increase humidity levels across the state from Sunday afternoon through Monday. Inversion heights will lift to around 8,000 to 9.000 feet enhancing clouds and showers in a moderate trade wind weather pattern. Confidence in this brief period of enhanced shower activity is only fair at the moment. Typically these remnant tropical systems tend to be compact in size and may possibly track a bit further north than currently predicted. If this system does move further north then our current weather forecast will change, resulting in less clouds and showers reaching the Hawaiian Islands. Stay tuned for further updates.
A high pressure ridge will swiftly build back into the region on Tuesday, just as the remnant trough continues on its westward journey away from the state. This returning ridge will bring strong stable trends with drier humidity levels, and a return to more typical dry summer weather across the state through the middle of next week.
Aviation
Light trades have given way to a hybrid sea breeze pattern this afternoon with flow directed increasingly onshore depending on the degree of sheltering. Limited afternoon showers over leeward zones will diminish with the loss of heating this evening. Trades then gradually strengthen during Friday with any shower activity focused windward and mauka.
No AIRMETs in effect.
Marine
Surface trough moving westward north of the waters will keep light to locally moderate flow through tonight. Trade winds will gradually strengthen Friday into the weekend as the high builds north of the state. A Small Craft Advisory for the windier waters and channels around Maui County and the Big Island could start as early as Friday morning and hold through the weekend.
Surf along south facing shores will remain small through tonight with mainly background medium to long period energy. Surf should see a slight bump early Friday and hold through early next week as a series of small long period southerly energy fills in.
A small, medium period northeast swell will keep surf along east facing shores elevated through the weekend. As this swell declines, the short period energy will fill in as trade winds increase into the weekend. North facing shores will remain flat to tiny through the forecast period except for areas that may be exposed to the small northeast swell.
Fire weather
Weather conditions should remain below critical fire weather thresholds into early next week. A low-level trough north of the islands will continue to move westward tonight producing a slight increase in clouds and showers. Another low-level disturbance associated with the remnants of former Tropical Cyclone Ivo will likely increase humidity levels and shower trends on Sunday and Monday. A return to lower humidity levels will develop by Tuesday as a stable upper-level ridge builds back over the island chain.
HFO Watches/Warnings/Advisories
None.
Check out their Big Island Helicopter Tours today!
Data Courtesy of NOAA.gov
