Puna Weather
Sunday 5th July 2026
Today through Wednesday moderate to breezy east or northeast trade winds and widely scattered showers, mostly during the night and early morning hours.
Thursday through Sunday light to moderate easterly trade winds and humid with frequent showers, possibly heavy at times.
A broad ridge to our north helps to maintain mainly easterly low level trade flow over us. Upstream moisture is somewhat limited so not too many showers through early Thursday, the good news is the humidity will near normal for this time of year.
A band of low level tropical moisture near 130W is being transported towards us by the background trade flow. The leading edge of this air mass reaches our shores sometime around Thursday. There will be a noticable rise in humidity that lasts for several days. The wind will be lighter as the north Pacific high shifts a little west during the passage of the humid air, they happen at the same time, but they're not related... at least not directly. The lighter winds will limit rain to some extent. Despite the lighter wind the moisture extends all the way to the top of our mountains, so rainfall can be heavy at times Thursday through Sunday, maybe into early Monday.
There are no tropical threats for us into the next couple of week in large part due to mid-level dry air from Hadley cell subsidence between us and Mexico and also significant shear over our entire island chain. A couple of weeks from now the GFS and the European model both want to weaken the shear and lift it north. The next MJO report comes out tomorrow, I'll try to include it in my post.
