Honolulu residents should keep umbrellas handy and be ready to adjust outdoor plans this week. The National Weather Service warns of possible showers and thunderstorms caused by an upper-level trough west of the islands.
In the details provided, the localized heavy rainfall could create conditions ripe for flash flooding. The NWS advisory specifically mentions that the threat of flooding will be highest in the afternoon to early evening hours due to daily sea breeze convergence. Additionally, the forecast anticipates that east to southeast winds may carry the vog (volcanic smog) from the Big Island over the smaller islands, potentially affecting air quality across the region.
Moving into the latter part of the week, a shift in the weather pattern is projected. The advisory indicates a high-pressure system will be northeast of the state and is expected to bring a return of the trade winds – this transition could help to ease the frequency and severity of the showers and clear vog conditions for the island chain. Still, the NWS suggests keeping an eye on local weather reports as these dynamics can lead to quick changes in the conditions…