Marine Interpretation Message
Issued by NWS

Home | Current Version | Previous Version | Text Only | Print | Product List | Glossary On
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28
AGPN40 KWNM 230252

Marine Weather Discussion for N Pacific Ocean
NWS Ocean Prediction Center Washington DC
752 PM PDT Thu Mar 22 2018

.FORECAST DISCUSSION...Major features/winds/seas/significant
.weather for the North Pacific N of 30N and E of 150W.

Current satellite pictures show a low center located just NW of
the Washington waters. An altimeter pass from 19Z indicates seas
near 18 ft west of the Oregon waters. An ASCAT pass from 20Z
shows strongest winds located west of the Oregon and northern
California area 30-35 kt. At this time I don`t plan on making any
changes to the grids or associated text forecast. The most recent
run of the GFS shows very good consistency.


An ASCAT pass at 18Z shows an area of gales W of the northern and
central waters. This will diminish tonight and tomorrow as a
shortwave moves E over the northern waters. A cold front is also
indicated across the central California waters in the ASCAT pass
as well as the 18Z surface analysis. This front will move E
across the waters while weakening tonight.

12Z model agreement is excellent through the entire forecast
period. Global models also continue to be very consistent between
model runs. This will lead to a high confidence forecast for the
period. Will use the 12Z GFS as the starting point for the
forecast, with a few minor edits.

.SEAS...Will use the 12Z WW3 for the forecast, though both the
WAM and WW3 initialized well and are in good agreement



.PZ5 Washington/Oregon Waters...
.PZZ915...Outer Waters from Florence OR to Point St. George...
     Gale Saturday.
     Gale Possible Saturday night.

.PZ6 California Waters...
.PZZ920...Outer Waters from Point St. George to Point Arena...
     Gale Saturday.
     Gale Possible Saturday night.


.Forecaster Shaw/Sommerville. Ocean Prediction Center. is the U.S. government's official web portal to all federal, state and local government web resources and services.