Marine Interpretation Message
Issued by NWS
AGPN40 KWNM 280813
Marine Weather Discussion for N Pacific Ocean
NWS Ocean Prediction Center Washington DC
1213 AM PST Tue Feb 28 2017
.FORECAST DISCUSSION...Major features/winds/seas/significant
.weather for the North Pacific N of 30N and E of 150W.
00z global models in good agreement through most of the forecast
period. Will populate wind grids from 00z GFS through the
Coastal trough along California coast in interacting with
building high pressure from the northwest providing winds in the
25 kt range along the southern and central California coast. This
pattern is expected to persist through tonight, with gradient
beginning to relax Wednesday.
Strong cold front expected to approach the offshore waters
Wednesday night. Fairly strong ridge expected to persist just
west of the northern and central California waters during this
time period. This pattern should allow for the front to weaken as
it moves towards the offshore waters, as the front interacts
with the ridge. Winds in the southerly flow ahead of the front
expected to be in the 30 kt range late Wednesday night into
Thursday before weakening. Front expected to continue to weaken
as it moves southeast across the PZ5 waters Thursday into
Both the GFS and the UKMET then pick up on a potential frontal
wave developing along the front late Thursday night and moving
northeast across the northern PZ5 waters Friday. GFS a bit
stronger with the wave than the UKMET, but do not indicate any
gale conditions with this feature. Will limit winds to 25 kt for
Low pres then expected to move north of the offshore waters
Saturday and Saturday night. Global models are in decent
agreement with the track and the strength of the low, with
potential for winds to 30 kt in the south quadrant of the low.
GFS a bit stronger with the winds in the southerly flow ahead of
the front across northern and central California offshore waters
Saturday and Saturday Night. Will limit winds to 25 kt ahead of
the front, which will bring it more in line with the ECMWF/UKMET.
.SEAS...ENP within a foot or two of current observations. Will
populate wave grids from 00z ENP through the forecast period with
.EXTRATROPICAL STORM SURGE GUIDANCE...N/A.
.PZ5 Washington/Oregon Waters...
.PZ6 California Waters...
.Forecaster Achorn. Ocean Prediction Center.