Marine Weather for HS 102

Forecast

marine weather discussion for N Pacific Ocean NWS ocean prediction center Washington DC 215 am PDT Sat may 27 2017

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

The most recent altimeter passes indicates the seas across the offshore waters are running 4-9 ft. The 00z global models are in very good agreement through at least the first 3 days as the gradient continues to relax over the region and high pressure builds across the area. A low pressure trough along the California coast will strengthen on days 2 and 3, causing winds to increase to 25 kt over the inner California waters, mainly along the central and Southern California coast. The ECMWF and UKMET are more progressive across the pz5 waters than the GFS after day 3. This is a change from yesterday when the GFS was more progressive later in the week. In either case the pattern across the offshore waters will remain quiet as the winds over the Washington and Oregon waters will be hard pressed to exceed 15 kt with minimal seas. Further south the dominate feature will be the low pressure trough expected to strengthen along the California coast while high pressure continues west of the waters. I will maintain forecast continuity from yesterday and populate the wind grids using the GFS, either the 10m or 30m depending on the stability profile.

Seas...both the enp and wam initialized pretty good across the region. Will populate the wave grids using a 50/50 blend of the two wave models,

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

.Warnings...Preliminary.

.Pz5 Washington/Oregon waters... None.

.Pz6 California waters... None.

$$

.Forecaster Shaw. Ocean prediction center.

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