First Alert Forecast: Classic Hawaii trade wind weather

HONOLULU (HawaiiNewsNow) – Partly to Mostly Sunny skies with windward and mauka showers drifting leeward at times. Most of the rainfall will be light and in the overnight to early morning hours with an increasing trend on Tuesday and stronger trends on Thursday and Friday; which is good because we need to beneficial rainfall.

View the latest weather conditions here.

Trade winds will continue blowing from the east all week while a high-pressure system sits north of Hawaii, keeping conditions mostly stable. On Tuesday, a weak weather system moving in from the east will bring some extra showers across the islands, but nothing major. A more significant system arrives Thursday through Friday—it’s actually the leftover remains of a tropical cyclone—and will bring noticeably heavier rain, especially on the windward sides of the islands (the sides facing the trade winds) and on mountain slopes, with humidity increasing as well. The highest rainfall will happen Thursday through Friday, though overall rainfall amounts will stay limited due to large-scale stability in the atmosphere.

A Small Craft Advisory now in effect for all Hawaiian waters (a warning for smaller boats to be cautious). A new long-period swell from the south-southwest is already moving in and will boost south shore surf heights to near-High Surf Advisory levels through Monday before gradually fading. East-facing shores will remain rough and choppy throughout the week from the strong winds, while north-facing shores will stay relatively flat. These windy conditions and Small Craft Advisories will continue through the entire week.

Download the HNN Weather app from the Apple App Store or Google Play for the latest updates from your First Alert Weather Team: chief meteorologist Jennifer Robbins, meteorologist Drew Davis, and weather anchors Guy Hagi, Ben Gutierrez, and Billy V.