Hawaii Extended Forecast Discussion
NWS Weather Prediction Center College Park MD
348 AM EDT Sun Jul 21 2024

Valid 00Z Mon Jul 22 2024 - 00Z Mon Jul 29 2024

Guidance continues to show high pressure near 40N latitude being
the primary influence on the trades for most of the coming week. 
This high will drift east and strengthen into the first part of
the week, followed by a westward return along with eventual
weakening by next Saturday-Sunday.  Initially moderate trades will
likely trend toward brisk/windy conditions mid-late week with some
moderation next weekend.  A deepening weakness aloft north and
west of the state may also help to slacken the pressure gradient
next weekend.  A modest pocket of moisture crossing the area this
weekend will give way to a drier trend on Monday, followed by
another area of enhanced moisture crossing the region
Tuesday-Wednesday. This moisture may consist of two distinct
pockets of higher precipitable water values, as ECMWF-based
guidance was suggesting 24 hours ago with the GFS now trending in
that direction.  This moisture should help to provide some
enhancement to the prevailing windward/mountain-focused showers. 
Guidance still suggests there will be a drier period from late
week into the weekend.

Rausch