Marine Interpretation Message
Issued by NWS

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000
AGPN40 KWNM 200757
MIMPAC

MARINE WEATHER DISCUSSION FOR N PACIFIC OCEAN
NWS OCEAN PREDICTION CENTER WASHINGTON DC
1257 AM PDT WED AUG 20 2014

.FORECAST DISCUSSION: MAJOR FEATURES/WINDS/SEAS/SIGNIFICANT
.WEATHER FOR THE NORTH PACIFIC N OF 30N AND E OF 150W.

THE 06Z SFC ANALYSIS INDICATED LOW PRES TO THE NW OF THE WA/OR
WATERS WITH A WARM FRONT EXTENDING SE...WITH HIGH PRES RIDGE TO
THE W OF OR AND CA WATERS. ASCAT PASSES FROM LATE TUE EVENING
MISSED MAJORITY OF THE AREA...BUT DID INDICATE SOME 20 TO 25 KT
WINDS OVER THE NE PORTION OF WA WATERS.

THE 00Z MODELS CONTINUE TO BE IN VERY GOOD AGREEMENT THROUGH THE
FCST PERIOD. THE LOW PRES NW OF THE WA/OR WATERS WILL MOVE SE
TODAY INTO THU WITH WEAKENING COLD FRONT PASSING ACROSS THE WATERS
BEFORE STALLING OVER THE S OREGON WATERS THU NIGHT AND
DISSIPATING. HIGH PRES RIDGE WILL THEN BUILD E AND NE WHILE
COASTAL TROUGH STRENGTHENS. WITH VERY FEW MDL DIFFERENCES...PLAN
ON POPULATING GRIDS USING 50/50 BLEND OF THE GFS 10M AND 30M
WINDS THROUGH THE PERIOD. NO WARNING HEADLINES WILL BE NEEDED AS
WINDS REMAIN BELOW GALE OVER THE OFFSHORE WATERS.

.SEAS...THE 06Z SEA STATE ANALYSIS INDICATED THAT THE OBSERVED
SHIP AND BUOY OBS WERE WITHIN A FT OF THE MWW3/ECMWF WAM WAVE
HEIGHTS. WILL USE A 50/50 BLEND OF MWW3 AND ECMWF WAM THROUGH THE
PERIOD. STILL LOOKS LIKE LONGER PERIOD SWELL WILL AFFECT THE SRN
CA WATERS AND S PORTION OF CENTRAL CA WATERS THU INTO THE WEEKEND
AS TROPICAL CYCLONE LOWELL PASSES W OF THE OFFSHORE WATERS.

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

.WARNINGS...PRELIMINARY.

.PZ5 WASHINGTON/OREGON WATERS...
     NONE.

.PZ6 CALIFORNIA WATERS...
     NONE.

$$

.FORECASTER KOSIER. OCEAN PREDICTION CENTER.


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