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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 260909
MIMPAC

Marine Weather Discussion for N Pacific Ocean
NWS Ocean Prediction Center Washington DC
209 AM PDT Wed Apr 26 2017

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

There was an ASCATB pass from about 05Z with a swath across much
of the offshore waters with the exception E of 120W over the srn
CA waters and over the far wrn section of the nrn and central 
areas of the CA waters. Where data was available over the far ern
section of srn CA waters max winds were to 35 kt. There was also
small area of the srn CA over the nrn areas with winds to 30 kt.
Elsewhere near the NW WA waters there were W winds to 25 kt.
Models similar with this area of winds moving E into the WA
waters today.

At 06Z preliminary surface analysis had high pressure W of the
central CA waters. Weak low pressure was W of the OR waters and 
moving E along a front. Model guidance maintains area of 
moderate Nly winds over the srn and into the central CA waters 
with gale force over the inner waters of the offshore waters 
today and tonight which gradually expand N across CA as coastal 
trof develops and expands northward through Fri. This occurs as
upper shortwave moves SE along inland areas of the wrn USA and
closes off well inland over Nevada/Arizona late Fri and Fri
night. Models similar with winds over the CA waters becoming 
weaker by Fri night as the trof along CA becomes weaker. By Sat
a strong cold front moves E over the WA/OR waters. The GFS/GEM
are stronger with winds in advance of the front than the 
UKMET/ECMWF. Will likely go no stronger than 25 kt or perhaps 30
kt in advance of the front.

Seas...Both the WWIII and ECMWF wam are in close agreement
through much of the forecast period into Fri night. The WWIII is
higher with seas associated with a cold front that moves E 
across the WA/OR waters Sat and Sat night. Will use a 50/50 blend
into Fri night then likely favor the ECMWF wam for Sat and Sat
night and boost seas by 10 to 15 percent.

.EXTRATROPICAL STORM SURGE GUIDANCE...n/a.

.WARNINGS...Preliminary.

.PZ5 Washington/Oregon Waters...
     None.

.PZ6 California Waters...
.PZZ835...Inner Waters from Point Piedras Blancas to Santa Cruz Island, CA...
     Gale Thursday night.
     Gale Possible Friday night.
.PZZ840...Inner Waters from Santa Cruz Island, CA to San Clemente Island, CA...
     Gale tonight into Thursday night. 
     Gale Possible Friday.
.PZZ940...Outer Waters from Santa Cruz Island, CA to 120W...
     Gale Thursday into Thursday night. 
.PZZ945...Outer Waters from 120W to San Clemente Island, CA...
     Gale Thursday into Thursday night. 

$$

.Forecaster Rowland. 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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Page last modified:  Monday, July 25, 2016 12:56:02 UTC