Hawaii Extended Forecast Discussion
NWS Weather Prediction Center College Park MD
255 AM EST Tue Mar 07 2023

Valid 00Z Wed Mar 08 2023 - 00Z Wed Mar 15 2023

A cold front along with some showers currently moving over Maui is
forecast to weaken over the Big Island today. But another cold
front is expected to shift into the northwestern islands this
evening along with a band of enhanced moisture and showers per
model guidance like the HREF. An upper low will continue to push
the front across the state tonight and into Wednesday, and then
the fronts should clear the state completely. Breezy conditions
are likely ahead of the front but winds are likely to strengthen
further behind the front on Wednesday. Since these winds will be
westerly, counter to the  normal trade wind direction, this could
cause increased impacts like downed trees. The front will also
clear out the moisture for a drying trend into Thursday and
remaining through late week, with lower dewpoints and few if any
showers. Westerly winds are forecast to gradually weaken by Friday
and remain on the weaker side into the weekend given a weak
pressure gradient at the surface. Moisture levels should increase
at some point early next week, but there remains considerable
uncertainty about the timing of any moisture return.

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