Hawaii Extended Forecast Discussion
NWS Weather Prediction Center College Park MD
819 AM EDT Thu Jul 25 2019

Valid 00Z Fri Jul 26 2019 - 00Z Fri Aug 02 2019

The weather pattern across Hawaii looks to remain relatively
unchanged through the next week. A broad mid/upper-level weakness
should remain in place across the state, with a surface high
anchored north of the state, keeping 10-20 kt trades in place. An
area of relatively deep moisture with a progression of surface
troughs/easterly waves should remain just south of Hawaii, with
one such wave passing just south of Hawaii Thu night-Fri, another
Sun-Mon, and another by late next week. Each of these waves may
provide a slight enhancement in shower activity across Hawaii,
although the deepest moisture and most widespread showers should
remain south of the state, at least with the first two of these
systems. Models differ a bit more with respect to late next week,
with the ECMWF showing a similar evolution to the first two waves,
and the GFS taking the wave farther north and spreading deeper
moisture across Hawaii. Additionally, some slight enhancement of
the trades will be possible as each wave passes, with gusts of 30
kt possible at times.

Ryan