Marine Interpretation Message
Issued by NWS

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000
AGNT40 KWNM 180712
MIMATN

MARINE WEATHER DISCUSSION FOR N ATLANTIC OCEAN
NWS OCEAN PREDICTION CENTER WASHINGTON DC
212 AM EST THU DEC 18 2014

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

SUMMARY...STRENGTHENING LOW PRES OVER THE GLF OF MAINE WILL PASS
NE OVER NOVA SCOTIA TODAY AND TONITE. A HIGH PRES RIDGE WILL MOVE
E TOWARD THE AREA FRI INTO FRI NITE...BUILD OVER THE WATERS SAT
INTO SAT NITE...THEN PASS NE OF THE AREA SUN AND SUN NITE. DVLPG
LOW PRES WILL MOVE OFF THE SOUTH CAROLINA COAST LATE SAT...THEN
DRIFT NE ACROSS THE NT2 AREA SAT NITE THRU MON NITE WHILE PULLING
A COLD FNT E INTO THE NT2 WTRS.

MODELS...THE 00Z MED RNG MDLS ARE IN GUD OVERALL AGREEMNT ACROSS
THE OFSHR WTRS THRU SAT...SO THE 00Z GFS 30M WILL BE USED TO
POPULATE THE WIND GRIDS FOR THIS TIMEFRAME. HOWEVER...THE MED RNG
MDLS HAVE BEEN SHOWING POOR RUN TO RUN CONSISTENCY OVER THE PAST
FEW RUNS REGARDING THE DVLPG COASTAL LOWS...AND THEY ARE NOT IN
GUD AGREEMNT CONCERNING TIMING/STRENGTH/TRAJECTORY OF THE DVLPG
COASTAL LOWS DURING THE SUN THRU MON NITE PRD. WILL BE USING THE
ECMWF FOR SAT NITE THRU MON NITE...SINCE THE 00Z ECMWF HAS GUD
SUPPORT FROM THE LATEST WPC MED RNG FCSTR GUIDANCE.

SEAS...THE 00Z MULTIGRID WW3 MDL GUIDANCE LOOKS REASONABLE OVER
THE OFSHR WTRS FOR TODAY THRU SAT. GIVEN THAT THE 00Z ECMWF IS
THE PREFERRED MDL FOR SUN THRU MON NITE...THE 00Z ECMWF WAM WILL
BE USED TO POPULATE THE SEA HT GRIDS FOR THIS PRD.

.EXTRATROPICAL STORM SURGE GUIDANCE...WITH OFSHR WINDS FOR THE NEXT
COUPLE OF DAYS...BOTH ESTOFS AND ETSS SHOW A NEGATIVE SURGE...WITH
ESTOFS IN 1.0 TO 1.5 FT RANGE FROM VA CAPES TO MARTHAS VYD TONITE
THRU FRI. ETSS IS LESS NEGATIVE WITH SURGE VALUES UP TO 1.0 FT. A
BLEND OF THESE TWO MODELS IS PREFERRED.

.WARNINGS...PRELIMINARY.

.NT1 NEW ENGLAND WATERS...
.ANZ800...GULF OF MAINE...
     GALE EARLY TODAY INTO TODAY.
.ANZ805...GEORGES BANK WEST OF 68W...
     GALE EARLY TODAY INTO TODAY.
.ANZ900...GEORGES BANK EAST OF 68W...
     GALE EARLY TODAY INTO TODAY.
.ANZ810...SOUTH OF NEW ENGLAND...
     GALE EARLY TODAY INTO TODAY.

.NT2 MID ATLC WATERS...
.ANZ915...HUDSON CANYON TO THE GREAT SOUTH CHANNEL...
     GALE EARLY TODAY INTO TODAY.
.ANZ905...THE GREAT SOUTH CHANNEL TO THE HAGUE LINE...
     GALE EARLY TODAY INTO TODAY.
.ANZ910...EAST OF THE GREAT SOUTH CHANNEL AND SOUTH OF 39N...
     GALE TODAY.

$$

.FORECASTER SCOVIL. OCEAN PREDICTION CENTER.


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