Residents of Honolulu can expect dry and stable conditions lasting through tomorrow, as per the National Weather Service. In a forecast, a deep-layer ridge over the region is pointed to as the reason for the land and sea breeze regime, alongside an outlook for potential afternoon clouds and minimal showers over interior and leeward areas. However, increased moisture associated with a cold front arriving on Thursday is likely to boost rain chances, particularly on northern and windward slopes where northerly winds are expected.
Looking at the rest of the week, a series of fronts moving north of the Hawaiian Islands has led to a southward shift in a surface ridge, with a light southerly low-level flow predicted to begin later today. This will maintain the current pattern, with chances for modest afternoon showers remaining low, as mentioned in recent NWS analysis. Yet, the NWS is also forecasting "probabilistic QPF guidance," which suggests heightened precipitation along the same northern and windward slopes as the week unfolds into its second half.
In aviation news, light winds will continue to dominate the state, according to the latest NWS updates, ensuring predominantly dry conditions, albeit with limited shower activity. Pilots should note, however, that moderate upper level turbulence is affecting the Big Island, an advisory situation that is expected to improve later in the day. For seafarers, the marine forecast anticipates light to variable wind patterns throughout the week owing to the high pressure ridge nearby, with a minor cold front foreseen to drift through the area on Thursday, followed by gentle to moderate northerly winds.
Surfers should be on the lookout for increased swell energy from the NNW later today, causing a modest uptick in surf height for north- and west-facing shores. A high surf warning for those areas may be issued by Thursday and Friday, with another large NNW swell expected to join Hawaiian waters over the coming weekend. A Small Craft Advisory remains likely, as combined seas are predicted to surpass the 10-foot mark by late tomorrow. Conversely, southern and eastern shores will see smaller surf due to disrupted trade winds and short-period background swell.
Finally, fire weather concerns are minimal as critical conditions are not expected throughout the week. This is attributed to the incoming moisture from the approaching cold front, as well as persistently light winds, which collectively negate the seasonal threat of wildfire outbreaks.
