Marine Interpretation Message
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000
AGPN40 KWNM 232125
MIMPAC

Marine Weather Discussion for N Pacific Ocean
NWS Ocean Prediction Center Washington DC
125 PM PST Tue Jan 23 2018

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

Per the 18Z OPC surface analysis a cold front was located over
the southern PZ5 waters extending into the far NW PZ6 waters. A
1027 mb high located west of the southern PZ6 waters, near
31N130W, extended its ridge into the PZ6 waters. Latest ASCAT
high resolution data from near 18-19Z revealed 20-30 kt winds
over the PZ5 waters with an area of gales over the far NW PZ5
waters and inner parts of the SE PZ5 waters. 20-30 kt winds were
also noted over the NW PZ6 waters with an area of gales just west
of the area. 10-20 kt winds were noted over the central and
southern PZ6 waters roughly between 125W and 119W.

Populated the grids using the 12Z GFS through Wednesday 15Z given
overall model agreement in the near term. Expecting gales
associated with the cold front moving through the PZ5 waters to
push east of the waters by early Wednesday as the front continues
to clear the region. Guidance then deviates, albeit slightly in
regards to low pressure impacting the waters later Wednesday
night through late Thursday night. Because of that, figured it
was reasonable to allow existing grids to continue as is for
that same time period. Guidance has come into slightly better
agreement on the late Friday into Saturday night system though
there`s enough difference here that I felt it was reasonable to
also continue with a persistence forecast here for now until
guidance comes into even better agreement on a solution.
Expecting another frontal system to move through the PZ5 and
northern PZ6 waters on Sunday Day 5 with fairly decent agreement
on the timing of the front among guidance for now given its day
5. No changes to the warning headlines place from later
Wednesday on as well.

.SEAS...Favored 12Z NWW3 through Wednesday 15Z given choice to
favor 12Z GFS winds transitioning to the prior grids for the rest
of the period given choice to continue with ongoing wind grids.


.EXTRATROPICAL STORM SURGE GUIDANCE...N/A.


.WARNINGS...Preliminary.

.PZ5 Washington/Oregon Waters...
.PZZ800...Inner Waters from Cape Flattery to Cape Shoalwater...
     Gale Wednesday night into Thursday.
     Gale Possible Friday night into Saturday.
.PZZ900...Outer Waters from Cape Flattery to Cape Shoalwater...
     Gale Wednesday night into Thursday.
     Gale Possible Friday night into Saturday.
.PZZ805...Inner Waters from Cape Shoalwater to Cape Lookout...
     Gale tonight.
     Gale Possible Saturday.
.PZZ905...Outer Waters from Cape Shoalwater to Cape Lookout...
     Gale Wednesday night into Thursday.
     Gale Possible Friday night into Saturday.
.PZZ810...Inner Waters from Cape Lookout to Florence OR...
     Gale today into tonight.
     Gale Wednesday night.
     Gale Possible Friday night into Saturday.
.PZZ910...Outer Waters from Cape Lookout to Florence OR...
     Gale Wednesday night into Thursday.
     Gale Possible Friday night into Saturday.
.PZZ815...Inner Waters from Florence OR to Point St. George...
     Gale today into tonight.
     Gale Wednesday night.
     Gale Possible Friday night into Saturday.
.PZZ915...Outer Waters from Florence OR to Point St. George...
     Gale Wednesday night.
     Gale Possible Friday night into Saturday.

.PZ6 California Waters...
.PZZ820...Inner Waters from Point St. George to Point Arena...
     Gale today into tonight.
.PZZ920...Outer Waters from Point St. George to Point Arena...
     Gale today.

$$

.Forecaster Holley. Ocean Prediction Center.


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