Marine Interpretation Message
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AGNT40 KWNM 071305
MIMATN

MARINE WEATHER DISCUSSION FOR N ATLANTIC OCEAN
NWS OCEAN PREDICTION CENTER WASHINGTON DC
905 AM EDT TUE JUL 7 2015

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

WEAKENING WARM FRONT EXTENDS SE OVER NANTUCKET SHOALS TO NEAR
39N65W. 1022 MB HIGH WAS CENTERED ABOUT 300 NM E OF CAPE COD AND
STRONGER HIGH WAS CENTERED NEAR BERMUDA. WINDS CONTINUE LIGHT
THROUGHOUT THE WRN ATLANTIC ATLC...GENERALLY 15 KT OR LESS...
THOUGH APPCHNG 20 KT IN SRLY FLOW ALONG THE COAST OF MAINE. SEAS
ARE 2 TO 4 FT. DO NOT EXPECT TO MAKE ANY CHANGES TO THE FCST FOR
THE UPDATE.


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PREVIOUS DISCUSSION...

SUMMARY...LATEST AVAIL ASCAT PASSES FROM 0115Z TO 0118Z AND FROM
0254Z TO 0256Z TONITE WERE SHOWING LIGHT WINDS ACROSS THE CSTL
AND OFSHR WTRS. LIGHTNING DENSITY PRODUCT DATA AT 0640Z INDICATES
A FEW ISOLD SHOWERS OVER THE SRN NT2 AREA...MAINLY NEAR THE NORTH
CAROLINA CST. 00Z NCEP SFC ANALYSIS SHOWS A WARM FNT EXTNDG SE TO
NW ACROSS THE NRN NT2 WTRS...WITH RDG ACROSS THE OFSHR AREAS N AND
S OF THE FNT. WINDS COULD REACH 25 KT AT TIMES WITH A COLD FNT
MOVG THRU THE OFSHR WTRS THU AND THU NITE...BUT OTHW WINDS SHD
NOT EXCEED 20 KT DURG THE FCST PRD.

MODELS...THE 00Z MED RNG MDLS ARE IN GUD OVERALL AGREEMNT THRU
THE FCST PRD...EXCEPT THERE ARE SOME MINOR TIMING DIFFS WITH THE
COLD FNT AND A COUPLE OF WEAK FNTL LOWS OVER THE THU THRU FRI NITE
TIMEFRAME. 00Z ECMWF/GFS/UKMET IN VRY GUD AGREEMNT NOW...EXCEPT THE
UKMET LOOKS STRONGER WITH THE LOW MOVG SE INTO THE NOVA SCOTIA
AREA FOR LATE SAT AND SAT NITE. THE 00Z GFS 10M LOOKS LIKE A GUD
MEDIAN MDL SOLN THRU THE FCST PRD...SO IT WILL BE USED TO POPULATE
THE WIND GRIDS.

.SEAS...THE WNA VERSION OF THE 00Z WAVEWATCH III MDL AND 00Z ECMWF
WAM BOTH INITIALIZED WELL ACROSS THE OFSHR WTRS. THESE MDLS ARE IN
VRY GUD AGREEMNT ACROSS THE CSTL/OFSHR WTRS DURG THE FCST
PRD...EXCEPT THERE ARE SOME RELATIVELY MINOR DIFFS OVER THE NRN
NT2 WTRS FOR THE LATE THU THRU FRI NITE PRD. A 50/50 BLEND OF THE
00Z WNA WW3/ECMWF WAM WILL BE USED FOR THE SEA HT GRIDS THRU THE
FCST PRD TO SMOOTH OUT THE DIFFS.

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


.WARNINGS...PRELIMINARY.

.NT1 NEW ENGLAND WATERS...
     NONE.

.NT2 MID ATLC WATERS...
     NONE.

$$

.FORECASTER PROSISE/SCOVIL. OCEAN PREDICTION CENTER.


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