Marine Interpretation Message
Issued by NWS

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000
AGNT40 KWNM 301919
MIMATN

MARINE WEATHER DISCUSSION FOR N ATLANTIC OCEAN
NWS OCEAN PREDICTION CENTER WASHINGTON DC
319 PM EDT THU JUL 30 2015

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

SUMMARY...12Z NCEP SFC ANALYSIS SHOWS A STNRY FNT ARCING ACROSS
THE CNTRL NT2 AREA...WITH ANOTHER STNRY FNT EXTNDG NW TO SE OVER
THE GULF OF MAINE AND GEORGES BANK WTRS...AND A TROF EXTNDG S FROM
CAPE HATTERAS TO 31N. OTHERWISE WEAK HI PRES RIDGING PREVAILS
OVER THE OFSHR WTRS THIS MRNG. LATEST AVAIL ASCATB PASSES FROM
THIS MRNG SHOW A SWATH OF 20 KT WINDS IN W TO SW FLOW OVER THE
OUTER GEORGES BANK WTRS. OTHERWISE...ASCAT ONLY SHOWS LIGHT WINDS
OF 15 KT OR LESS OVER THE OFSHR WTRS. WEAK COLD FNTS WILL MOVE
ACROSS THE NT1 AND NRN NT2 WTRS FRI AND FRI NITE...THEN AGAIN SAT
NITE INTO SUN. A STGR COLD FNT IS EXPCTD TO MOVE E AND APRCH THE
ERN SEABOARD LATE MON NITE...THEN MOVE OFSHR TUE AND TUE NITE.

MODELS...THE 12Z MED RNG MDLS ARE IN GUD OVERALL AGREEMNT ACROSS
THE OFSHR WTRS THRU THE FCST PRD. ALTHO THERE ARE SOME MINOR
STRENGTH DIFFS WITH THE SW FLOW OVER THE NT2 WTRS ON FRI AND FRI
NITE...SOME OF THE MDLS INDICATE MARG GALES IN AND ARND THE GULF
STREAM...MAINLY THE 12Z GEM AND 12Z NAM...SO WILL KEEP THE GALE
WRNGS UP FOR THE NT2 WTRS. THE GFS HAS BEEN VRY REPRESENTATIVE
THE PAST FEW DAYS AND HAS ALSO SHOWN VRY GUD RUN TO RUN
CONSISTENCY...PLUS IT ALSO HAS GUD SUPPORT FROM THE LATEST WPC MED
RNG FCSTR GUIDANCE. THE 12Z GFS 30M SOLN LOOKS LIKE A GUD FIT
BTWN THE STGR 12Z GEM AND THE WEAKER 12Z ECMWF...SO IT WILL BE
USED FOR THE WIND GRIDS FOR TODAY THRU MON. A 50/50 BLEND OF THE
GFS 30M/ECMWF APRS TO BE THE MOST REPRESENTATIVE SOLN FOR MON
NITE THRU TUE NITE...SO IT WILL BE USED FOR THIS TIMEFRAME.

SEAS...THE WNA VERSION OF THE 12Z WAVEWATCH III AND 12Z ECMWF WAM
BOTH INITIALIZED WELL ACROSS THE OFSHR WTRS. WILL BE MATCHING THE
SEA HT MDLS WITH THE ATMOS MDLS...SO THE 12Z WNA WW3 WILL BE USED
TO POPULATE THE SEA HT GRIDS FOR TODAY THRU MON THEN WILL SWITCH
TO USING A 50/50 BLEND OF WNA WW3/ECMWF WAM FOR MON NITE THRU TUE
NITE.

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

.WARNINGS...PRELIMINARY.

.NT1 NEW ENGLAND WATERS...
     NONE.

.NT2 MID ATLC WATERS...
.ANZ925...OUTER WATERS FROM BALTIMORE CANYON TO HATTERAS CANYON...
     GALE FRI INTO FRI NIGHT.
.ANZ930...OUTER WATERS FROM HATTERAS CANYON TO CAPE FEAR...
     GALE FRI.

$$

.FORECASTER SCOVIL. OCEAN PREDICTION CENTER.


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