The Hawaiian Islands are currently experiencing showers with the potential for isolated thunderstorms, particularly affecting the smaller islands. Today's light southerly winds may trigger additional showers and thunderstorms in the afternoon. However, trade winds are anticipated to return by late tonight, gaining strength early in the next week, as reported by the National Weather Service.
According to the same source, weather forecasts have been updated to include the likelihood of thunderstorms across the smaller islands and surrounding waters. The instability, caused by a stationary front and trough to the north, is expected to diminish as high pressure from the southeast moves over the area. Despite grounds being saturated on islands such as Kauai and Oahu, which raises concerns about additional flooding, the threat of such events remains low. The transition from light winds to moderate to locally breezy trade winds by Monday or Tuesday is being watched closely.
In terms of aviation, an unstable atmosphere continues over the islands, which can lead to occasional Mountain-Valley Flight Rules conditions and isolated Instrument Flight Rules conditions due to clouds and showers. "The Big Island is expected to have primarily VFR conditions, but the occasional shower moving overhead could bring brief MVFR conditions," the NWS noted. Pilots should be prepared for potential sea breezes in the afternoon and know that trade winds are expected to make a comeback later today.
Marine conditions reflect a similarly unsettled pattern with scattered showers and possible thunderstorms over the western coastal waters. Southeastern winds are maintaining gentler conditions on the eastern waters currently, but sailors should prepare for strengthening easterly trade winds by the end of the weekend. As per the NWS report, two northerly swells are contributing to higher surf on north-facing beaches, though without necessitating high surf advisories.
Fire weather concerns are minimal as the region is expected to remain below critical thresholds for the next few days, according to the recent advisories. Light rains and high humidity, along with transitioning winds, should mitigate the risk of fires starting or spreading across the islands. As conditions evolve, no watches, warnings, or advisories are currently in place, signifying a measure of stability amidst the changing weather patterns.
