Marine Weather for HS 102


marine weather discussion for N Pacific Ocean NWS ocean prediction center Washington DC 154 am PDT Thu may 25 2017

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

An altimeter pass from 05z indicates seas are near 20 ft over the inner offshore waters along the northern California coast, which is about 2 ft above the wave guidance, an ascat pass from 05z shows an area of gales along the northern California coast and far SW Oregon coaset. All of the 00z global models indicate that the gradient will diminish this morning to below gale force. The models remain in very good agreement throughout the forecast period, with only some minor differences. Strong high pressure W of the offshore waters will gradually diminish during the next 24 hours causing the gradient over the region to weaken and winds to diminish. A weak low pressure trough over the central and Southern California waters continues and is an area of light winds. I will populate the wind grids using a 50/50 blend of the 10m and 30m GFS throuighout the forecast period.

Seas...for the most part the wave models were initialized well across the region, although data indicates that seas were forecast a couple feet too low across the area of maximm winds along the northern California coast. I will populate the wave grids using the enp throughout the period, while blending with the wam through today to give a little boost to the 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 today.


.Forecaster Shaw. Ocean prediction center.

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