As the trade winds continue to sweep through Hawaii, moderate to breezy conditions are expected to persist through today before a gradual decrease begins tomorrow. According to the Honolulu Weather Forecast, this trend will maintain through the upcoming week, providing the islands with a stable weather pattern and limited shower activity. A slight rise in cloud and shower trends has been noted this morning, attributed to a weak easterly wave moving through. However, this is expected to wane by the afternoon as a high pressure ridge takes greater hold.
Residents can anticipate more stable conditions under the influence of the high pressure ridge. Lower subsidence temperature inversion heights, ranging between 4,000 and 6,000 feet, will cap vertical cloud development and significantly reduce cloud cover and showers across the state. This drier pattern is slated to remain consistent throughout the coming week, with the exception of brief, isolated showers over windward and mountain areas primarily in the overnight to early morning hours. Moreover, the trade winds will shift from their current moderate to breezy status to a more moderate pace from Monday through Friday, the pressure gradient over the state relaxes.
Those taking to the skies should be aware that breezy trade winds will persist through tonight, with low clouds and showers favoring windward and mauka districts during the morning. An improvement in these conditions is forecasted for this afternoon. "AIRMET Sierra remains in effect for mountain obscuration over windward sections of Kauai Oahu Molokai and Maui. Condition should improve later this morning in most areas," as stated in the Honolulu Weather Forecast with anticipation of clearer skies later in the day. Turbulence alerts are also in place for areas downwind of island terrain.
Marine advisories stay in effect, with the National Weather Service extending a Small Craft Advisory for breezier zones around Maui County and the Big Island through tonight. These trade wind speeds are expected to dial down to gentle to fresh levels by tomorrow. A small, medium period south swell is keeping surf modest along southern shores, with a gradual increase anticipated with a south southwest swell (200 degrees) arriving midweek. On the eastern shores, the surf will remain choppy, then slowly decrease in synchrony with the declining trade winds, but with local wind swell potentially reaching north and south shores intermittently, and a background west northwest swell could offer a minor surge for north shores by late Tuesday into Wednesday.
With breezy trade winds and low relative humidity prevailing today, fire weather concerns remain heightened for leeward areas, particularly West Maui and leeward Kohala on the Big Island. Though most leeward areas are predicted to stay dry, and windward regions may experience brief shower spells mainly at night, humidity levels are expected to recover significantly well overnight. The primary exceptions to this trend are higher elevations, which could endure warmer and drier conditions within and above the subsidence temperature inversion level. The NWS has issued a Small Craft Advisory, in effect until early Monday, emphasizing caution for mariners navigating the more turbulent affected waters.
