Hawaii Extended Forecast Discussion
NWS Weather Prediction Center College Park MD
346 AM EDT Wed Aug 30 2023

Valid 00Z Thu Aug 31 2023 - 00Z Thu Sep 07 2023

On Wednesday, trade winds will be starting to strengthen to breezy
levels as surface high pressure northeast of the state drifting
west will increase the pressure gradient. A weak plume of moisture
is likely to push westward through the islands, which could lead
to a few clouds and showers across windward/mauka areas and should
protect from conditions being too dry on Wednesday. But
unfortunately, drier dewpoints and humidity looks to be in place
for Thursday, which along with the breezy to windy trades has led
the Honolulu Weather Forecast Office to issue a Fire Weather Watch
to monitor the potential for conditions conducive to spreading
fires. By 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
possible while the surface pressure gradient could weaken as well.
This will lower wind speeds, and model guidance is indicating that
moisture could be pulled northward from the ITCZ starting around
next Tuesday, likely first for the Big Island and then moving west
across the state for midweek, with the details still yet to be
determined at this point.

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