Hawaii Extended Forecast Discussion
NWS Weather Prediction Center College Park MD
728 AM EST Wed Jan 24 2018

Valid 00Z Thu Jan 25 2018 - 00Z Thu Feb 01 2018

Trades will continue to weaken during the later half of the week
while strong surface high pressure north of the Islands slides
eastward and a weakening frontal boundary approaches from the
northwest.  The GFS and GEFS members remain on the amplified side
of model spread with a mid-level trough aligning over Hawaii this
weekend, but overall models are in good agreement that the trough
should help keep a surface low spinning up east of the Islands,
east of the Islands (with the exception of an outlying 00Z CMC
which has a farther west mid-level trough that allows the surface
low and it's anomalous moisture to cross the State Sunday into
Monday).  Late in the forecast period, the GFS and ECMWF are in
good agreement that another cold front approaching from the
northwest will reach the Islands by the middle of next week.      
 

Gerhardt