Hawaii Extended Forecast Discussion
NWS Weather Prediction Center College Park MD
829 AM EDT Sat May 28 2016

Valid 00Z Sun May 29 2016 - 00Z Sun Jun 05 2016

During the next couple of days, amplified mid-latitude flow will
carry a longwave trough eastward with the attendant cold front
gradually weakening across the northern islands. Precipitable
waters values do not change much upon frontal passage which only
supports a slight increase in shower activity along the shearing
boundary. Toward the early/middle part of next week, upper ridging
begins to take shape with a surface anticyclone centered north of
Hawai`i. This will support an increase in the east-northeasterly
trades with many solutions suggesting sustained winds in excess of
20 knots. Beyond this period, the upper flow gradually
de-amplifies with a general weakening of the surface ridging
across the region. In response, the climatological trades are
forecast to diminish in strength through the end of next week.
Rainfall chances should pick up during the period of peak trades
as there is an uptick in available moisture as precipitable waters
spike to around 1.50 inches.


Rubin-Oster