Marine Interpretation Message
Issued by NWS

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000
AGNT40 KWNM 301225
MIMATN

MARINE WEATHER DISCUSSION FOR N ATLANTIC OCEAN
NWS OCEAN PREDICTION CENTER WASHINGTON DC
825 AM EDT TUE JUN 30 2015

.FORECAST DISCUSSION: MAJOR FEATURES/WINDS/SEAS/SIGNIFICANT
.WEATHER FOR THE NORTH ATLANTIC OCEAN W OF 50W FROM 30N TO 50N.

NO MAJOR CHANGES ARE PLANNED FOR THE MORNING UPDATE. THE 06Z GFS
IS IN GOOD AGREEMENT FOR THE MOST PART...HOWEVER IT DOES INDICATE
SOME GALES OVER THE FAR NE PORTION OF THE NT2 WATERS LATER TUE
NIGHT INTO EARLY WED. NONE OF THE OTHER GLOBAL MODELS ARE AS
STRONG WITH THE WINDS...AND WILL CONTINUE TO KEEP WINDS JUST BELOW
GALE IN THIS AREA. OTHERWISE...STATIONARY FRONT OVER THE MID
ATLANTIC WATERS WILL MOVE LITTLE THE NEXT FEW DAYS WITH CONVECTION
EXPECTED NEAR AND TO THE E OF FRONT. THE LATEST SEA STATE ANALYSIS
INDICATED THAT OBSERVED SEAS WERE WITHIN A FT OF THE MWW3 FCST
VALUES.

-----------------------------------------------------------------
PREVIOUS DISCUSSION...

SUMMARY...LATEST AVAIL ASCAT PASSES FROM 0200Z TO 0203Z SHOW LIGHT
WINDS OVER THE CSTL/OFSHR WTRS...EXCEPT WINDS TO 20 KT OVER THE
FAR ERN PART OF THE CNTRL NT2 WTRS. 00Z NCEP SFC ANALYSIS SHOWS A
WKNG FNTL BNDRY EXTNDG NE TO SW ACROSS THE NRN/CNTRL NT2
WTRS...WITH HI PRES RDG SE OF THE FNT...AND A LOW PRES TROF
EXTNDG ROUGHLY N TO S ACROSS THE SRN NT2 WTRS. LIGHTNING DENSITY
PRODUCT AT 0700Z WAS SHOWING SCT SHOWERS/TSTMS ACROSS THE OUTER
NT2 ZONES S OF 37N.

MODELS...SINCE MOST OF THE 00Z MED RNG MDLS STILL DO NOT SUPPORT
GALES DURG THE FCST PRD...THE REPRESENTATIVE 00Z GFS 10M SOLN WILL
BE USED FOR THE WIND GRIDS. OTHW...THE 00Z MED RNG MDLS ARE IN
GUD AGREEMNT WITH THE OVERALL FLOW PATTERN THRU SAT NITE. AM NOT
PLANNING TO MAKE ANY SIGNIF CHANGES TO THE CURRENT FCST TREND.

SEAS...WNA VERSION OF THE 00Z WAVEWATCH III MDL AND THE 00Z ECMWF
WAM BOTH INITIALIZED WELL ACROSS THE OFSHR WTRS. THERE ARE SOME
MOSTLY MINOR DIFFS BTWN THE TWO MDLS FOR TUE INTO WED...THEN AGAIN
FOR THU THRU FRI NITE...SO A 50/50 BLEND OF THE 00Z WNA WW3/ECMWF
WAM WILL BE USED TO POPULATE THE SEA HT GRIDS THRU THE ENTIRE FCST
PRD.

EXTRATROPICAL STORM SURGE GUIDANCE...N/A.


.WARNINGS...PRELIMINARY.

.NT1 NEW ENGLAND WATERS...
     NONE.

.NT2 MID ATLC WATERS...
     NONE.

$$

.FORECASTER KOSIER/SCOVIL. OCEAN PREDICTION CENTER.



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