The Weather Prediction Center

College Park, MD

Hawaii Extended Forecast Discussion

Hawaii Extended Forecast Discussion
NWS Weather Prediction Center College Park MD
812 AM EDT Sat Sep 20 2014

Valid 00Z Sun Sep 21 2014 - 00Z Sun Sep 28 2014

Models and ensembles show reasonable agreement on upper ridging
initially NW of Hawai'i near the Dateline to move eastward along
30N through much of next week. Elevated PW values over the Big
Island this weekend will drop off below climo values (which are
just under 1.50 inches) to about 1.20 inches. By about midweek,
the upper/sfc high near 165W should help advect more moisture from
the northeast into the area. With a stronger than average pressure
gradient, trades should be higher than average with scattered
showers through the period becoming more widespread by later in
the week per the ensembles (not unlike the 00Z ECMWF).


Last Updated: 812 AM EDT Sat Sep 20 2014