Marine Weather for HS 102


marine weather discussion for N Pacific Ocean NWS ocean prediction center Washington DC 821 PM PDT Fri Mar 23 2018

.Forecast discussion...Major features/winds/seas/significant .Weather for the North Pacific N of 30n and E of 150w.

Atthis time I don't plan on making any changes to the grids or associated text forecast. Satellite pictures indicate a strong low just W of the Washington waters tracking se.

---------------------------------------------------- Previous discussion...

An ascat pass at 18z indicates an area of gale force winds just to the west of the northern California waters. Expect these to diminish in the next few hours, ahead of an area of more widespread gales. These will continue tonight through Saturday with a low moving across the northern waters.

12z model agreement remains excellent throughout the forecast period. Will use the 30m GFS through 00z sun in order to bring gale force winds with the expected cold air advection. Beyond this, will use the 10m GFS as there is little model disagreement and it provides excellent continuity with the previous forecast.

.Seas...Models appear to have initiated quite well based on the 18z observations. Will continue using the ww3 throughout, with a little boost to the seas Saturday and Saturday night with the stronger winds.

.Extratropical storm surge guidance...N/A


.Pz5 Washington/Oregon waters... .pzz915...outer waters from Florence or to point St. George... gale Saturday into Saturday night.

.Pz6 California waters... .pzz820...inner waters from point St. George to Point Arena... gale Saturday. .Pzz920...Outer waters from point St. George to Point Arena... gale tonight into Saturday night.


.Forecaster Shaw/Sommerville. Ocean prediction center.

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