Hawaii Extended Forecast Discussion
NWS Weather Prediction Center College Park MD
803 AM EDT Mon Oct 20 2014
Valid 00Z Tue Oct 21 2014 - 00Z Tue Oct 28 2014
...'Ana' and her threats migrating to the Outer Islands...
Sensible weather impacts in the next 48 hours shift
westward---between 160W-170W---and high pressure gradually
rebuilds across the state from east to west.
The 20/00Z dynamical model guidance (ECMWF, GFS, Canadian)
maintained good continuity with the poleward re-curvature of
'Ana'---and its entrainment into the mid-latitude westerlies
on/after day 4 appears to be gaining momentum invof 30N 165W-170W.
This model cycle closely follows the CPHC Oct 19/11pm LST forecast
'cone' and its outlook period (day 4-5).
Beyond day 5, the deterministic ECMWF may end up being the outlier
in the northeast Pacific, and prefer the solution offered by the
GFS/Canadian along 40N latitude. This in mind, Hawai'i returns to
'seasonal' conditions with easterly trades resuming across the
For additional information and forecasts on 'Ana', please refer to
the Central Pacific Hurricane Center and your local National
Weather Service office.