Hawaii Extended Forecast Discussion
NWS Weather Prediction Center College Park MD
730 AM EST Wed Nov 15 2017

Valid 00Z Thu Nov 16 2017 - 00Z Thu Nov 23 2017

The main synoptic system impacting the weather across Hawaii
during the forecast period will be an upper-level cut-off/closed
low in the higher latitudes which is forecast to drop south to
approximately 30N...150W during the weekend before pulling out
further to the northeast as a positively tilted trough by early
next week.  Model guidance this morning continues to show fairly
good agreement on this scenario.  Although the ECMWF maintains a
faster eastward progression of this trough by early next week,
Hawaii remains sandwiched between the marine stratus layer on the
back side of this system and the plume of tropical moisture well
to the south and east through the forecast period.  Thus, only
scattered showers are expected with decreasing trade winds as the
system approaches during the weekend, followed by gradual
resumption of the trades toward the middle of next week.

Kong