Honolulu's trick-or-treaters enjoyed stable weather conditions yesterday, but it seems the real spookiness might be reserved for the weekend. According to the National Weather Service in Honolulu, while moderate trades will keep the next day stable, a change is on the horizon. By Sunday evening, a southward-moving frontal boundary and an upper-level low are predicted to bring uncomfortably wet weather across Hawaii, with Kauai potentially facing the brunt of it from late Sunday into Monday.
For the day post-Halloween, commonly referred to as "candy recovery day," little change is expected. However, the NWS indicates that by the latter half of the weekend, we should brace for an uptick in precipitation across the state. "The frontal boundary, an upper-level low is progged to develop, pulling even more moisture northward across the state," as reported by the NWS. As the trades weaken, Big Island and Maui will see shifts out of the southeast, while Kauai and Oahu will have winds coming from the northeast.
Marine conditions will also feel the effects of this approaching front. The NWS has issued a Small Craft Advisory through Saturday morning for certain waters around Maui County and the Big Island, anticipating winds to drop off as the weekend progresses. Beginning tomorrow, the front may stir up gale force winds and even thunderstorms for the extreme northwest portions of the offshore waters.
Surfers are advised to stay alert, as the Hawaiian Islands could experience High Surf Advisory (HSA) levels by tomorrow morning due to an incoming long period NNW swell. Kauai and Oahu could see HSA levels again by Sunday afternoon, as they are hit by a short period NNE swell. Meanwhile, east facing shores will see smaller swells, while slowly diminishing south swells will keep things moderate through the weekend.
In terms of fire weather, there's a silver lining amidst the potential drenching. The increased relative humidity and moderate trades are likely to keep fire weather conditions below critical thresholds for several days, providing some sense of relief on that front. While Halloween may have passed without atmospheric frights, the skies above the Hawaiian Islands seem poised to provide their own dramatic spectacle in the days following. Stay informed and stay dry, folks.
