Honolulu’s weather forecast shows strengthening trade winds as a high-pressure system north of the islands moves south. Clouds and light showers will affect windward and mauka areas, “particularly overnight and during the early morning as a rather dry and stable airmass settles over the state and persists into the weekend.” The high-pressure system will keep breezy conditions through the weekend, while tropical cyclones Iona and Kali remain several hundred miles south with no direct impact on Hawaii, according to the National Weather Service.
Aviators can expect stronger trade winds with mainly VFR conditions, though occasional MVFR may occur overnight and early mornings due to low clouds and showers over windward and mountain areas; AIRMETs Tango and Sierra remain in effect for moderate turbulence and possible mountain obscurations. Mariners should prepare for rough, trade wind-driven seas, with a Small Craft Advisory in place for “windier waters and channels around Maui County and the Big Island,” now extended to Kauai waters. In addition, a Tsunami Advisory remains in effect for all Hawaiian islands and waters until noon HST today, as reported by the National Weather Service.
"Humidity and wind speeds will be near critical conditions today into the weekend as breezy conditions develop," increasing fire weather concerns. "A multi-day buildup of surf for south facing shores is expected starting today as long period swells fill in," with the first swell building this afternoon and a larger swell expected on Thursday evening into Friday that may reach advisory or warning levels. North shores may also see long-period northwesterly swells from Typhoon Krosa over the weekend, as stated by the National Weather Service.
