Honolulu residents can expect to see a mix of locally heavy showers and potential thunderstorms in the coming days, as a moist and unstable airmass continues to hover over the islands, the National Weather Service (NWS) in Honolulu reports. According to their latest weather forecast, this unsettled pattern is due to persist until trade winds kick in later this week. In the meantime, sea breezes will likely contribute to afternoon showers and thunderstorms, primarily in interior and leeward areas, with activity tapering off at night.
The calm before the return of brisk trade winds is currently due to a weak low-pressure trough near Kauai and a high-pressure system sitting far northeast of Honolulu, which are maintaining light winds and land breezes across Hawaii; this setup is expected to invite a slight chance of thunderstorms over mostly interior regions during afternoon hours, then some clearing with land breezes at night, the NWS summary indicates. Visibility disruptions and lower cloud ceilings could result from the stronger showers, but outside of these episodes, predominantly favorable flying conditions are forecasted for aviators.While the land and sea breeze pattern will stick around for a bit, a transition to a more stable weather situation with the return of trade winds should commence by Wednesday, promising relief from the patchy rainfall and thunderstorm threats back to the familiar windward side showers, the weather service explains.
Such relief extends beyond just a reprieve from rainfall, as the reestablished trades are anticipated to disperse vog conditions, produced by volcanic emissions, that have persisted across most of the state since Tuesday.Mariners are advised to be mindful of heavier showers and potential thunderstorms that could impact coastal and offshore waters due to the lingering trough near Kauai these effects are slowly expected to shift east within the next day; light and variable winds are to continue until trade winds recommence midweek as a high builds north of Hawaii, according to the marine forecast by NWS Honolulu. For beachgoers, there's a modest swell forecasted on the horizon: a medium long-period north-northwest swell hitting the shores later this week, though it is unlikely to surge beyond advisory levels.
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Environment
Unstable Weather Pattern Brings Showers and Thunderstorms Over Honolulu; Trade Winds Expected to Return by Midweek

Honolulu forecast includes heavy showers and potential thunderstorms with unstable weather until trade winds return later in the week.