Marine Interpretation Message
Issued by NWS

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543
AGNT40 KWNM 060827
MIMATN

MARINE WEATHER DISCUSSION FOR N ATLANTIC OCEAN
NWS OCEAN PREDICTION CENTER WASHINGTON DC
327 AM EST SAT FEB 6 2016

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

THE SAT IMG DEPICTS THAT MOST OF THE CONV IS NOW E OF THE REGION
AND HGH PRES IS NOW BUILDING IN FROM THE W. FEW LGHTNG STRIKES ARE
JUST NE OF THE BALT CANYN AND THE RADAR HAS DSLVG TSTMS CELLS OVR
THE GULF OF MAINE WTRS. THE SREF HAS LESS THA 5 PERCENT CHNCE OF
TSTMS OVR THE REGION BUT TSTMS CNHCE WILL INCRS OVR THE FAR SRN
WTRS TO 40 PERCNT SUN. AT 06Z LOW PRES 989 MB NOW NR NOVA SCOTIA
HAS A CLD FRNT STRETCHNG S AND IS NOW 240 NM E OF THE REGION. AN
INLAND HIGH PRES OVR THE S-ERN STATES HAS A WEAK RIDGE INTO THE
FRSCT WTRS. STRNG HGH PRES 1034 MB OVR THE ATLC NR 34N40W XTNDS A
RIDGE W BUT DOES NOT REACH THE WTRS INSTEAD ITS BLOCKING THE FRONT
FORM MOVNG E. THE PRES GRDNT HAS NOW RELAXED OVR MOST OF THE
REGION INCLUDING THE NRN WTRS WHERE THE WINDS ARE JUST BELOW GALE
FORCE. THE LATST ASCAT PASS AT 0134Z HAD NO GALE FORCE WINDS OVR
MOST OF THE REGION AND MISSED THE BALT CANYN WHER THE WINDS ARE
HGHER.

SIGNFCNT ENERGY EMBDD IN AN UPPRLVL TROF IS JUST EXITING THE NRN
WTRS AND FOLLOWING BEHIND IS AN UPPRLVL RIDGE WITH ALMOST NO
ENRGY. ANOTHER POCKET OF ENERGY IS EMBDD IN AN UPPLVL CLOSED LOW
OVR CANADA JUST N OF THE GRT LKS. ANOTHER AREA OF ENRGY IS OVR THE
MID WEST AND THAT WILL MOVE INTO THE WTRS WHILE THE ENERGY OVR
CANADA WIL PASS JUST N OF THE REGION IN THE SHORT TERM. THERE IS
MORE ENERGY APPROACHIG FROM THE W THAT WILL COMBINE WITH SOME FROM
THE N AND THEN REACH THE WTRS IN THE XTNDD PRD. AS SUCH A MODEST
TIGHT PRES GRDNT WIL RESULT AND THAT SHUD GENERATE WINDS TO AT
LEAST GALE FORCE OVR SVRL FRSCT WTRS.

THE GLBL MDLS CONTINUE TO INITIALIZE WELL AND THEY AGREE IN THE
SHORT TERM MOVING THE LOW PRES FARTHER E AND BUILDING HGH PRES
SLIGTHLY THEN BRINGING A TROF WITH A CLD FRNT IN THE SHORT TERM.
SOME MNR DIFFS IN THE XTNDD PRD ON THE TIMING OF THE FRNT BDNRY
AND ALSO ON THE STREGTH OF THE WINDS. GFS HAD HURCN FORCE WINDS
OVR THE WTRS IN PREVIOUS RUNS BUT HAS NOW DROPPED THEM WITH THE
00Z RUN WHILE CMC HAS IT JUST E OF THE REGION. THE ECMFWF HAS UP
T0 TO 50 KT WHILE UKMET HAS 55 KT JUST E OF THE WTRS. WILL TWIG
GFS WINDS BUT KEEP WINDS BELOW HURCN FORCE IN THE WTRS. IN THE
SHORT TERM LOW PRES WILL ZOOM FARTHER NE OF THE WTRS AS HGH PRES
BUILD IN FROM THE W. A RELAXED PRES GRDNT WILL KEEP WINDS BELOW
GALE FORCE. LOW PRES WILL DVLP FROM THE S AND MVE NE ACRS THE WTRS
AND RESULTANT WINDS WIL BE ELEVATED TO NR HURC FORCE IN A FEW
PLACES.

.SEAS...THE HGST SEAS ARE OVR THE BALT CYNYN PEAKING AT 21 FT.
SEAS RANGE BTWN 12 AND AT SEAS AND 18 FT OVR THE NRN AND CNTRL
WTRS AND THEY RANGE BTWN 8 AND 12 FT OVR THE SRN WTRS. THE LATST
JASON PASS OVR THE REGION WAS THIS MORNING AT 0134Z. THO MISED THR
ENTIRE REGION IT INDCTD HGHR SEAS OVR THE BALT CANYN. THE NWW3
MULTI GRID FITS WELL WITH THE SEAS PATTERN BUT IS UNDER DONE ON
PEAK VALUES UP TO 3 FT. THE ECMWFWV ALSO FITS WELL WITH THE SEAS
PATTERN AND MATCHES VERY CLOSE THE PEAK VALUES. WILL GO WITH WAN
FOR THE SEAS.

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

.WARNINGS...PRELIMINARY.

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

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

$$

.FORECASTER MUSONDA/MUSONDA. OCEAN PREDICTION CENTER.



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