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NOAA>NWS>NCEP>OPC>Marine>Pacific>Offshore>North Pacific Marine Weather Discussion

North Pacific Marine Weather Discussion

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AGPN40 KWNM 261448
MIMPAC

Marine Weather Discussion for N Pacific Ocean
NWS Ocean Prediction Center Washington DC
748 AM PDT Tue Sep 26 2017

.FORECAST DISCUSSION...Major features/winds/seas/significant 
.weather for the North Pacific N of 30N and E of 150W.

At this time I don't plan on making any changes to the current
grids or associated text forecast. An altimeter pass from 11Z
indicates seas across the offshore waters range from 3 ft in
far SE portion to 10 ft over the central inner waters.
-----------------------------------------------------------------
PREVIOUS DISCUSSION...

06Z Surface Analysis shows a large area of high pressure to the
west of the waters, with a coastal trough along the California
and Washington coasts. The high pressure ridge is expected to
build over the waters, while the trough moves west and weakens.
An ASCAT pass over the area where winds are expected to be
highest indicates winds of 20 to 30 kt. 

Global models continue with good agreement. There continues to be
some timing issues with a series of lows moving across the
Washington/Oregon waters beginning Wednesday night. ECMWF still
appears to be a good compromise for the timing and strength of
the systems. Will continue using the 10m GFS through 00Z 
Thursday and then switch to the ECMWF throughout the rest of the
forecast. 

.SEAS...Models match quite well with observations. Will follow
the same trend as the wind forecast with the Wavewatch through
00Z Thursday and the WAM beyond. 

.EXTRATROPICAL STORM SURGE GUIDANCE...N/A

.WARNINGS...Preliminary.

.PZ5 Washington/Oregon Waters...
     None.

.PZ6 California Waters...
     None.

$$

.Forecaster Shaw/Sommerville. Ocean Prediction Center.


NOAA/ National Weather Service
National Centers for Environmental Prediction
NOAA Center for Weather and Climate Prediction (NCWCP)
Ocean Prediction Center
Mr. Darin Figurskey
Chief, Ocean Forecast Branch
NCWCP, W/NP41
5830 University Research Court
College Park, Maryland 20740-3818

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