Hawaii Extended Forecast Discussion
NWS Weather Prediction Center College Park MD
821 AM EDT Thu Aug 13 2015

Valid 00Z Fri Aug 14 2015 - 00Z Fri Aug 21 2015

...'Hilda' remains a feature of the Hawai'i sensible weather
pattern...

Please continue referring to the official Central Pacific
Hurricane Center (CPHC) forecasts for the latest information
regarding 'Hilda' and the storm's sensible weather impacts.

From the 13/00Z model cycle --- the deterministic GFS/ECMWF
continue to feature several sub-synoptic scale entities --- not
related to 'Hilda' --- which seem to keep a rather
quasi-stationary flow pattern in place across the forecast area
through the forecast period.

The 13/00Z deterministic GFS/ECMWF and their ensemble packages
(ECENS/GEFS mean) continue to feature a nearly-stationary, but
shallow mid-level circulation (TUTT cell) --- invof 30N 160W ---
through Tuesday (18/12z).

The second feature of the pattern (a highly-sheared wave)---has
spread mid-level moisture across the western half of the state.
But currently has not generated additional sensible weather
issues. The current GFS/ECMWF continue to feature this entity as a
shallow moisture source for the forecast area---through the
weekend.

For the current sub-synoptic scale features --- a blend of the
13/00Z deterministic GFS/ECMWF and their ensembles means will
yield good results.

Vojtesak