340
FXHW01 KWNH 290821
PMDHI

Hawaii Extended Forecast Discussion
NWS Weather Prediction Center College Park MD
421 AM EDT Fri Aug 29 2025

Valid 00Z Sat 30 Aug 2025 - 00Z Sat 06 Sep 2025

Trades will remain pretty light over the next few days, as the
typical surface high to the north of the state is
weakened/displaced by a relatively strong surface low meandering
from around 40N to 35N. Meanwhile a dry airmass is in place, with
precipitable water (PW) anomalies well below average. Thus any
showers should be isolated through the end of the week. By early
next week, there is a general trend toward higher PWs for at least
the Big Island and possibly Maui with a surge of moisture. This is
especially seen in the EC/CMC guidance, while the GFS suite keeps
the deeper moisture just south. Meanwhile a weak upper low may
hover near/over Kauai. Both of these features may enhance some
rain amounts and coverage around Sunday, but nothing too heavy.
Mainly dry conditions are forecast to return around Tuesday and
beyond, though trades may increase slightly to around moderate
levels.

Tate

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