Marine Interpretation Message
Issued by NWS

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000
AGNT40 KWNM 200718
MIMATN

MARINE WEATHER DISCUSSION FOR N ATLANTIC OCEAN
NWS OCEAN PREDICTION CENTER WASHINGTON DC
218 AM EST SAT DEC 20 2014

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

SUMMARY...A HIGH PRES RIDGE WILL BUILD OFSHR TODAY INTO SUN...THEN
SHIFT NE ACROSS THE NRN NT2 AND NT1 WTRS SUN NITE THRU TUE. DVLPG
LOW PRES WILL FORM OFF THE SOUTH CAROLINA COAST SUN NITE...DRIFT N
OVER THE MID ATLC WATERS NEAR THE COAST MON INTO TUE...THEN WEAKEN
AS IT APRCHS THE NEW JERSEY COAST LATER TUE AND TUE NITE. THE LOW
WILL PULL A WARM FRONT N ACROSS THE NT2 WTRS SUN NITE THRU TUE. THE
WARM FNT WILL LIFT N OVER THE NT1 WTRS TUE NITE THRU WED NITE. A
STG COLD FRONT WILL MOVE E OFF THE SE COAST WED AFTN...SWEEP OFSHR
OF THE MID ATLC COAST LATE WED...THEN MOVE E OVER ALL OF THE OFSHR
AREAS WED NITE.

MODELS...THE 00Z MED RNG MDLS ARE IN GUD OVERALL AGREEMNT ACROSS
THE OFSHR WTRS THRU THE FCST PRD...EXCEPT THEY DIFFER WITH THE
TIMING OF THE STG COLD FNT DURING THE TUE NITE THRU WED NITE PRD.
00Z GEM/NOGAPS ARE FASTEST WITH THE COLD FNT...WHILE 00Z UKMET IS
SLOWEST...AND 00Z ECWMF/GFS ARE MEDIAN SOLNS WRT TIMING OF THIS
FTR. 00Z ECMWF LOOKS SOMEWHAT UNDERDONE WITH THE S TO SE FLOW
AHEAD OF THE FRONTS TUE NITE THRU WED NITE COMPARED TO THE OTHER
MDLS...SO WILL USE THE 00Z GFS 30M TO POPULATE THE WIND GRIDS
THRU THE ENTIRE FCST PRD BECAUSE THE ECMWF/GFS ARE IN EXCELLENT
AGREEMNT WRT TIMING.

.SEAS...THE WNA VERSION OF 00Z MULTIGRID WW3 MDL INITIALIZED
WITHIN A FT OR TWO OF BUOY OBS OVER THE OFSHR WTRS. THE 00Z MWW3
AND 00Z ECMWF WAM ARE IN CLOSE AGREEMNT INTO EARLY MON...SO WILL
POPULATE THE SEA HT GRIDS WITH THE 00Z MWW3 FOR TODAY INTO EARLY
MON. THE 00Z MWW3 AND 00Z ECMWF WAM DIVERGE SOMEWHAT DURING THE
LATER MON THRU WED NITE PRD...SO WILL BE USING A 50/50 BLEND OF
THESE MDLS FOR THIS TIMEFRAME TO SMOOTH OUT THE DIFFS.

.EXTRATROPICAL STORM SURGE GUIDANCE...ESTOFS IS INDICATING A POS
SURGE IN THE 1.0 TO 1.5 FT RNG ALG THE MID ATLC AND NEW ENG COASTS
FOR LATE WED THRU INTO EARLY THU...ASSOCD WITH STG S TO SE FLOW
AHEAD OF A WARM FNT AND A COLD FNT.


.WARNINGS...PRELIMINARY.

.NT1 NEW ENGLAND WATERS...
.ANZ800...GULF OF MAINE...
     GALE POSSIBLE WED INTO WED NIGHT.
.ANZ805...GEORGES BANK WEST OF 68W...
     GALE POSSIBLE WED INTO WED NIGHT.
.ANZ900...GEORGES BANK EAST OF 68W...
     GALE POSSIBLE WED INTO WED NIGHT.
.ANZ810...SOUTH OF NEW ENGLAND...
     GALE POSSIBLE WED INTO WED NIGHT.
.ANZ815...SOUTH OF LONG ISLAND...
     GALE POSSIBLE WED.

.NT2 MID ATLC WATERS...
.ANZ820...HUDSON CANYON TO BALTIMORE CANYON...
     GALE POSSIBLE WED.
.ANZ915...HUDSON CANYON TO THE GREAT SOUTH CHANNEL...
     GALE POSSIBLE WED INTO WED NIGHT.
.ANZ920...BALTIMORE CANYON TO THE GREAT SOUTH CHANNEL...
     GALE POSSIBLE WED INTO WED NIGHT.
.ANZ905...THE GREAT SOUTH CHANNEL TO THE HAGUE LINE...
     GALE POSSIBLE WED INTO WED NIGHT.
.ANZ910...EAST OF THE GREAT SOUTH CHANNEL AND SOUTH OF 39N...
     GALE POSSIBLE WED INTO WED NIGHT.
.ANZ825...INNER WATERS FROM BALTIMORE CANYON TO CAPE CHARLES LIGHT...
     GALE POSSIBLE WED.
.ANZ828...INNER WATERS FROM CAPE CHARLES LIGHT TO CURRITUCK BEACH LIGHT...
     GALE POSSIBLE WED INTO WED NIGHT.
.ANZ925...OUTER WATERS FROM BALTIMORE CANYON TO HATTERAS CANYON...
     GALE POSSIBLE WED INTO WED NIGHT.
.ANZ830...INNER WATERS FROM CURRITUCK BEACH LIGHT TO CAPE HATTERAS...
     GALE POSSIBLE TUE NIGHT INTO WED NIGHT.
.ANZ833...INNER WATERS FROM CAPE HATTERAS TO CAPE FEAR...
     GALE POSSIBLE WED INTO WED NIGHT.
.ANZ930...OUTER WATERS FROM HATTERAS CANYON TO CAPE FEAR...
     GALE POSSIBLE WED INTO WED NIGHT.
.ANZ835...INNER WATERS FROM CAPE FEAR TO 31N...
     GALE POSSIBLE TUE NIGHT INTO WED NIGHT.
.ANZ935...OUTER WATERS FROM CAPE FEAR TO 31N...
     GALE POSSIBLE TUE NIGHT INTO WED NIGHT.

$$

.FORECASTER SCOVIL. OCEAN PREDICTION CENTER.


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