Hawaii Extended Forecast Discussion
NWS Weather Prediction Center College Park MD
334 AM EDT Wed Aug 05 2020

Valid 00Z Thu Aug 06 2020 - 00Z Thu Aug 13 2020

Models/ensembles maintain good agreement and continuity for the
overall forecast during the period.  Moderate to brisk trades that
will support windward/mountain shower focus (though with some
showers straying leeward at times) should be strongest during the
weekend as high pressure initially north of the state strengthens
while it adjusts a bit eastward.  Then the pressure gradient
should relax gradually next Monday-Wednesday in response to the
high weakening somewhat as it drifts back to the west.  An upper
level weakness and an area of precipitable water values around or
above 1.50 inches passing through during the latter half of the
week should increase rainfall over some areas.  Guidance continues
to show a return to drier conditions between the weekend and next
Wednesday.  This trend could be offset a bit by a broadening area
of lower heights aloft over the region after Monday.  Also the Big
Island may be close to the northern periphery of an area of
moisture passing by to the south during a portion of the
Monday-Wednesday time frame.    

Rausch