Hawaii Extended Forecast Discussion
NWS Weather Prediction Center College Park MD
823 AM EDT Fri Aug 2 2019

Valid 00Z Sat Aug 3 2019 - 00Z Sat Aug 10 2019

The general flow pattern features a slow moving deep layer cyclone
in the general vicinity of 40 degrees north for much of next week
as a rex block develops over the North Pacific.  The guidance is
in good agreement with this low, including the ensemble means, so
a general model compromise should suffice for the main synoptic
scale features.  This system will help guide and weaken the
tropical cyclones near Hawai'i over the next several days.

The National Hurricane Center is continuing to issue advisories
for Tropical Storm Flossie, which is forecast to approach the main
islands late Sunday and Monday before passing to the north of the
state while weakening.  There is ongoing potential for another
episode of heavy rainfall in a more Kona trajectory (south to
southwest flow) and enhanced winds and high waves.

Away from the two tropical systems expect a moist trade wind
pattern with the heaviest rain likely for windward terrain. 
Mid-latitude high pressure should weaken for a time in response to
an east-central Pacific low.  Eastern Pacific high pressure should
expand toward the middle of next week, supporting moderate trades
immediately behind Flossie.

Hamrick/Roth