The forecast for Honolulu this weekend suggests an uptick in showers and a potential for heavy rains across the western parts of the state, though thunderstorms remain unlikely. According to the National Weather Service Honolulu, a weak upper low northwest of Kauai and higher moisture levels are behind the increased chances of precipitation. As the weekend progresses, the situation seems poised to gradually resolve, with a return to stable, drier weather expected by early next week.
As detailed in the latest weather bulletin, Oahu and Maui have already experienced a soggy start to their Saturday, with some areas recording a significant amount of rainfall in a very short time period. The National Weather Service Honolulu update suggests, the westward passage of a mid-level trough and cooling to the northwest are keeping the atmosphere primed for continued dampness. Especially in areas where windward exposures are prevalent, residents should anticipate persistent wet conditions through Sunday.
The atmosphere is becoming less stable, and that trend is expected to continue today. A system to the northwest and a mid-level trough are bringing in more moisture, leading to the most rain along north-facing slopes and nearby coastal waters. Thunderstorms are unlikely, but there’s a small chance of isolated storms around northern Kauai and nearby waters through Monday, as reported by the National Weather Service.
An upper level low that has been stirring the pot is set to meander away to the northwest, clearing the stage for ridging and thus more predictable, stable conditions. Mid-week may see a minor uptick in trade wind showers, especially around the western islands, as a northern mid-level trough briefly graces the region, this hint of instability is expected to be fleeting, with more settled weather patterns on the horizon, as stated by the National Weather Service.
The aviation forecast remains cautiously optimistic, with trade winds continuing to ferry in moderate conditions. Pilots should remain alert for intermittent MVFR conditions along windward slopes throughout the day. For seafarers, the marine conditions reflect a similar trend: high pressure to the north maintaining moderate trades, while a small, long period southwest swell gradually builds, peaking later tonight before subsiding into next week, as per the National Weather Service.
Fire weather concerns, often elevated in drier conditions, are currently at bay thank to the wet pattern blanketing the state. However, the fire weather threat could see an upturn as the expected early-week drying trend materializes, particularly for leeward zones that may not fully benefit from this weekend's rains. Lastly, National Weather Service Honolulu has not issued any watches, warnings, or advisories as of its latest weather forecast update.
