Honolulu residents are being advised to prepare for the potential impact of Tropical Depression One, which the Central Pacific Hurricane Center is keeping a close eye on as it moves westward, far east-southeast of the state. According to the latest update from the National Weather Service, the system could bring a wet and windy period over the weekend through early next week, with increased chances of rainfall and strong winds as it approaches.
Before the tropical system's expected impact, forecasters predict breezy trade winds to persist through Friday, focusing showers mainly on windward and mauka areas. A mid-level trough, combined with rising low-level moisture, is anticipated to increase the shower coverage later today through Friday, "likely enhance shower coverage," according to the National Weather Service. Leeward sections, potentially taken by surprise, could see increased rainfall especially during the night and early hours.
As Tropical Depression One strengthens into a hurricane while passing south of the Big Island over the weekend, local weather conditions are likely to be significantly affected. It is essential, as warned in the National Weather Service forecast, that Hawaiians stay alert and prepared for the onset of heavy rain and strong winds which may begin as early as Friday night into Saturday. Such a system could lead to localized flash flooding if excessive rain accumulates in specific areas.
Aviation and marine activities are also forecasted to be influenced by the imminent weather changes. Pilots are cautioned of low clouds and showers focused over terrain-shielded regions with "Breezy to locally windy trades will remain through the forecast period," the National Weather Service affirmed. Mariners aren't left out—increased winds are expected over the coming days, escalating to Gale force levels this weekend due to the approaching storm's bolstered might, necessitating the continuation of a Small Craft Advisory.
For those awaiting the swell, the current small long-period northwest swell is anticipated to peak today, followed by a decrease on Friday. However, according to National Weather Service forecasts, the east-facing shores are predicted to see a rise in surf levels above the norm from the weekend into early next week, which could reach advisory levels if the tropical system's approach intensifies the trade wind swell significantly.
