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Hawaii Extended Forecast Discussion
 
(Caution: Version displayed is not the latest version. - Issued 1218Z Sep 26, 2014)
 
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Hawaii Extended Forecast Discussion
NWS Weather Prediction Center College Park MD
818 AM EDT Fri Sep 26 2014

Valid 00Z Sat Sep 27 2014 - 00Z Sat Oct 04 2014

Upper ridging and surface high pressure currently to the northeast
of Hawai'i will ease eastward and weaken through the weekend, with
slowly weakening trades. By next week, the remains of tropical
storm Kammuri in the west Pacific should be entrained into the
westerlies along 40N and an in situ upper low south of the
Aleutians. The GFS/GEFS runs are a little south of the ECMWF and
ECENS/NAEFS means positions by Tue/Wed and are a bit wetter over
the Hawaiian islands despite comparable forecast PW values from
each ensemble system. Regardless, showers should be more
widespread than average during the next week with higher than
average PW values between 1.50-1.75" or so. Models/ensembles keep
the cold front near 30N/160W by next Friday.


Fracasso