Marine Weather for HS 102


marine weather discussion for N Pacific Ocean NWS ocean prediction center Washington DC 234 am PDT Sat Jun 23 2018

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

High pressure west of the region will persist and even strengthen slightly in the short term and that will contribute to tightening pressure gradient over the central waters as low pressure over north California strengthens. Goes16 rgb geocolor satellite images still show few clouds over the forecast waters. Latest NCEP map still has inland low pressure 1007 mb over northern California and extends trough southeast into another low pressure 1010 mb over Arizona and California border area. High pressure in a north to south orientation stretches from the Gulf of Alaska to just west of the southern waters. A combination of strengthening high pressure and persistent inland low pressure are combining to generate a tight pressure gradient over the central waters where maximum winds are just below gale force threshold.

At 500 mb, upper level ridge just west of the region will continue and that supports maintaining the surface high pressure to the west of the region. The models are still in agreement and so will just stay with GFS.

.Seas...They are small with a peak at just 10 ft over the central waters. Seas range between 2 and 6 ft over the northern waters and between 6 and 9 ft elsewhere. Both wave models fit well the observed seas pattern and variations in the short term are very small among the models . Will use enp for seas.

.Extratropical storm surge guidance...N/A.


.Pz5 Washington/Oregon waters... None.

.Pz6 California waters... .pzz820...inner waters from point St. George to Point Arena... gale tonight. .Pzz825...Inner waters from Point Arena to Pigeon Point... gale today.


.Forecaster musonda. Ocean prediction center.

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