Hawaii Extended Forecast Discussion
NWS Weather Prediction Center College Park MD
339 AM EDT Thu Aug 31 2023

Valid 00Z Fri Sep 01 2023 - 00Z Fri Sep 08 2023

A windy Thursday is on tap for Hawaii as a surface high northeast
of the state helps strengthen the pressure gradient. Meanwhile
ridging aloft and below normal dewpoints and humidity levels will
combine with the breezy to windy conditions to lead to the risk of
fire danger, and a Red Flag Warning is in effect especially for
leeward areas where downsloping can increase winds and lower
humidity. By Friday into the weekend, the winds and moisture
levels could both moderate a bit, but still on the breezier and
drier side of normal.

By early next week though, lowering heights aloft appear likely,
providing for some possible instability. A weakening surface
pressure gradient should lead to decreasing trade winds and
perhaps more of a land/sea breeze pattern. Increasing showers are
possible especially when and where moisture levels increase. There
is a chance of a brief incursion of moisture particularly for the
northwestern islands around Monday, but chances of a greater
moisture surge from the ITCZ into at least the Big Island by
around midweek or so, with the details still yet to be determined
at this point.


Tate