Marine Interpretation Message
Issued by NWS

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AGNT40 KWNM 302009
MIMATN

MARINE WEATHER DISCUSSION FOR N ATLANTIC OCEAN
NWS OCEAN PREDICTION CENTER WASHINGTON DC
409 PM EDT TUE JUN 30 2015

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

THE 12Z SFC ANALYSIS INDICATED A STATIONARY FRONT EXTENDING ACROSS
THE NRN AND CENTRAL MID ATLANTIC WATERS...WITH ANOTHER WEAK FRONT
FURTHER N JUST NW OF THE NEW ENGLAND WATERS. AN ASCAT PASS FROM
AROUND 1505Z INDICATED THE STRONGEST WINDS NEAR AND E OF THE
FRONTAL BOUNDARY IN THE 20 TO 25 KT RANGE. THERE WAS A SMALL AREA
OF 25 TO 30 KT OVER THE FAR S WATERS...THOUGH THIS WAS ASSOCIATED
WITH CONVECTION IN THE VCNTY.

THE 12Z MODELS ARE IN DECENT AGREEMENT THROUGH THE FCST PERIODWITH
REGARD TO SFC FEATURES...WITH ONLY SOME SUBTLE DIFFERENCES NOTED.
THE FRONTAL BOUNDARY WILL MOVE LITTLE THE NEXT 24 TO 36 HOURS
BEFORE WASHING OUT. ANOTHER FRONT WILL MOVE ACROSS THE AREA LATE
WED NIGHT INTO THU BEFORE BECOMING STATIONARY OVER THE CENTRAL MID
ATLANTIC WATERS. SEVERAL WEAK LOWS WILL MOVE NE ALONG THE FRONT
THU THROUGH SAT NIGHT. THE 12Z GFS HAS BACKED OFF ON THE WINDS
OVER THE NRN NT2 WATERS LATER WED AND WED NIGHT...AND NOW KEEPS
WINDS BELOW GALE SIMILAR TO THE OTHER MODELS. WITH THIS IN
MIND...WILL POPULATE THE WIND GRIDS USING THE 12Z GFS 10M WINDS
THROUGH THE PERIOD...WITH NO WARNING HEADLINES THROUGH THE FIVE
DAY FORECAST.

.SEAS...THE LATEST SEA STATE ANALYSIS INDICATED THAT THE OBSERVED
SEAS MATCHED UP WELL WITH THE MWW3/ECMWF WAM GUIDANCE. WILL
CONTINUE TO USE A 50/50 BLEND OF MWW3/ECMWF WAM THROUGH THE
PERIOD...SO OVERALL FEW CHANGES FROM EXISTING FCST.

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


.WARNINGS...PRELIMINARY.

.NT1 NEW ENGLAND WATERS...
     NONE.

.NT2 MID ATLC WATERS...
     NONE.

$$

.FORECASTER KOSIER. OCEAN PREDICTION CENTER.



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