Puna Weather
Monday 14th September 2026
Monday and Tuesday light to moderate easterly trade winds, warm and humid with scattered showers.
Wednesday moderate to breezy northeast winds, very warm, very humid with numerous showers, possibly heavy at times.
Thursday moderate to breezy easterly winds, very warm and very humid with heavy rain, some thunder and flooding is possible.
Friday and Saturday humid with scattered showers.
Sunday very humid with the risk of heavy rain.
First off, substantial shear exists between us and Mexico and will remain in place for another week or so. This means there is no chance of Norbert or TD 15 arriving at our island intact, both will just be a large area of moist air.
Higher moisture is headed our way. Initially the moisture is near the surface, so while it will be humid, but we're not expecting a lot of rain through early Wednesday.
The moisture deepens as the remnants of Norbert arrive late Wednesday/early Thursday. The GFS is showing some low level convergence and also some cooler air aloft with CAPE well above 1,000J/kg, because of this we can expect thunder and heavy rain late Wednesday and Thursday, possibly into early Friday.
Norbert's moisture moves west of us and somewhat drier air slated to arrive Friday and Saturday on easterly trade flow.
Late Saturday/early Sunday more deep tropical moisture and enough dynamics for the threat of heavy rain arrives on our shores as the remnants of TD 15 pass through the region.
So to recap, the greatest threat for flooding is late Wednesday through early Friday and again late Saturday through early next Monday.
