Marine Interpretation Message
Issued by NWS

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000
AGNT40 KWNM 291257
MIMATN

MARINE WEATHER DISCUSSION FOR N ATLANTIC OCEAN
NWS OCEAN PREDICTION CENTER WASHINGTON DC
900 AM EDT TUE 29 JUL 2014

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

BASED ON LAST NGTS HI RES ASCAT OVERPASS WILL BE UPDATING
OFFSHORE WIND GRIDS E OF COLD FRONT WITH 06Z GFS BNDRY LAYER
WINDS OVER NEXT 48HRS. SSTS N OF GULF STREAM OVER NERN MID ATLC
ZONES SPECIFICALLY ANZ905 AND NRN PART OF ANZ910 ARE AS HIGH AS
27C TO 28C. ALSO 00Z UKMET AND 00Z ECMWF ADVERTISE SFC WINDS AS
HIGH AS 30 KT OVER THESE AREAS EARLY WED AS SFC LOW MOVES NE
ALONG FRONT. OTHERWISE WILL NOT BE MAKING MUCH ADJUSTMENT TO
PREVIOUS OFFSHORE FORECASTS/GRIDS. 06Z MULTIGRID WAVEWATCH III
LOOKS REASONABLE WHEN COMPARED TO THE LATEST W ATLC SHIP/BUOY
OBS OVER THE PAST FEW HRS.

----------------------------------------------------------------
...PREVIOUS DISCUSSION...

LOW PRES WAS MOVG N ACRS MAINE WHILE INTENSIFYING EARLY THIS
MRNG. AN ASSOC CD FNT WAS MOVG OFFSHR THIS MRNG WITH HVY
CONVECTION INADVOF FNT OVR THE MID ATLC WTRS AND ALG AND JUST E
OF THE NEW ENGLAND WTRS. THERE WAS A SHIP OBS NR GEORGES BANK
WITH GUSTS TO GALE FORCE EARLY THIS MRNG. EARLIER ASCAT PASS FM
10 PM EDT HAD A SWATH ALG THE ERN NEW ENGLAND INTO THE NRN MID
ATLC WTRS E OF 71W SHOWING IN THE AREA OF TSTMS WINDS TO 35 KT.
WL CONT TO INDICATE IN FCST OVR THE ERN AREAS OF MID ATLC WINDS
GUSTING TO GALE FORCE IN HVY TSTMS. ELSW ALG THE SC COAST THIS
MRNG LOW PRES SHUD BE MOVG OFFSHR AND THEN NE ALG THE FNT TDY.
EARLIER ASCAT PASS FM 10 PM EDT HAD WINDS TO 30 KT IN THIS
REGION JUST W OF 76W. THE STGST AREA OF S TO SWLY FLW MOVS E OF
THE AREA WITH THE EXCEPTION FAR ERN AREAS OF THE OFFSHR WTRS
TDY. LOW PRES ALG SC COAST MOVS NEWD INTO THE NEW ENGLAND LATE
WED AND WED NGT. GFS IS FASTER MOVG LOW PRES INTO THE NEW
ENGLAND WTRS WHILE UKMET/12Z ECMWF ARE FURTHER S AND SLOWER.
STGST WINDS RMN TO THE E OF THE LOW WITH WINDS TO 30 KT. THE
FNTL BOUNDARY EVENTUALLY STALLS ALG OR JUST E OF THE OFFSHR WTRS
TUE NGT INTO THU...THEN DRIFTS W OR NW INTO THE WTRS FRI AND SAT
AS HIGH PRES EXPANDS E OF THE AREA. PLAN TO FAVOR THE GFS THRU
SAT NGT WHICH LOOKS SMLR TO THE GEM/UKMET WITH THEIR SYNOPTIC
PATTERN.

SEAS...00Z WWIII LOOKS OK AND DOES NOT DIFFER MUCH FM EARLIER
18Z GUID. OBS SEAS WHEN COMPARED TO WWIII GUID SHOW MOST OF
REGION CLOSE TO GUID. SHUD XPCT SEAS TO BE HIGHER IN AND NR THE
HEAVIER TSTMS TDY. ONLY EXCEPTION WHERE SEAS SEEM OVERDONE APRS
TO BE OVR THE NRN NEW ENGLAND WTRS IN GLF OF ME WHICH ARE A CPL
OF FT LWR THAN GUID.

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

.WARNINGS...PRELIMINARY.

.NT1 NEW ENGLAND WATERS...
     NONE.

.NT2 MID ATLC WATERS...
     NONE.

$$

.FORECASTER CLARK. OCEAN PREDICTION CENTER.


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