HONOLULU (HawaiiNewsNow) - A sharp upper level trough north of Hawaii will move south towards the islands and form a kona low over the state on Thursday. This low will continue to produce widespread showers with isolated thunderstorms across the islands through at least the upcoming weekend. Locally heavy rainfall is possible with this storm once it sets up over the state this weekend. Additional rounds of rainfall are forecast through the first half of next week.
Periods of treacherous winter weather remain in the forecast for the summits of Haleakala on Maui and the highest summits of Maunakea and Maunaloa on the Big Island. A winter storm warning remains in effect for Haleakala through Thursday evening and for the Big Island summits through Friday evening.
By late Thursday afternoon, the High Surf Warning for east facing shores will likely be downgraded to an advisory and the High Surf Advisory for north facing shores will be dropped. The elevated, though declining, surf will remain at east shore advisory levels through most, if not all, of the weekend. A moderate northwest swell is also expected over the weekend.