Marine Weather for HS 102

Forecast

marine weather discussion for N Pacific Ocean NWS ocean prediction center Washington DC 1256 am PDT sun Mar 29 2020

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

For the wind grids, will lean towards the 00z GFS through 06z Thu, then switch towards the 00z ECMWF after 06z Thu and lasting through the remainder of the forecast period 12z Fri.

Latest global model guidance still on track with the strength and track of a cold front expected to move across the northern offshore waters tonight. Guidance showing winds in the 30 kt range in the southerly flow ahead of the front in the northern offshore waters, with some gales possible near the coast as the front pinches along the coast. Models trending stronger with the associated low pressure system north of the offshore waters, and bring gale force winds close to the northwest portion of the northern offshore waters on Mon. Will keep gales north and west of the offshore waters for now, but will need to be watched. Low slowly weakens Mon night into Tue night before moving inland near Vancouver Island.

High pressure building towards the southern offshore waters is expected to interact with a coastal low pressure trough along the southern and central California coast Tue and Tue night, with winds up to 30 kt possible in the southern and central offshore waters. Trough expected to extend northward Wed and persist until the end of the forecast period Thu night, with winds up to 30 kt possible.

Models stronger with the ridge in the extended portion of the forecast, and slows approaching cold front towards northern offshore waters and is weaker than in previous runs. This is evident on latest GFS and ECMWF solutions and will follow this trend in the next forecast package.

.Seas...For the wave grids, will lean towards 00z enp version of wavewatch model until 00z Fri, the switch towards 00z ecmwfwave from 00z Fri through the end of the forecast period.

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

.Warnings...Preliminary.

.Pz5 Washington/Oregon waters... None.

.Pz6 California waters... None.

$$

.Forecaster achorn. Ocean prediction center.

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