Marine Interpretation Message
Issued by NWS

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000 AGNT40 KWNM 202020 MIMATN MARINE WEATHER DISCUSSION FOR N ATLANTIC OCEAN NWS OCEAN PREDICTION CENTER WASHINGTON DC 420 PM EDT MON OCT 20 2014 .FORECAST DISCUSSION: MAJOR FEATURES/WINDS/SEAS/SIGNIFICANT .WEATHER FOR THE NORTH ATLANTIC OCEAN W OF 50W FROM 30N TO 50N. CURRENT OBS INDICATE CONDITIONS ARE SLOWLY DIMINISHING OVER ERN OFFSHORE WATERS AS SYSTEM MOVES TOWARD NEWFOUNDLAND. SCAT PASS FROM 14Z SHOWS MAX WINDS NR 20 KT OVR ERN PTNS AS WELL. OVR THE NEXT 24 HRS HIGH PRES WILL MOVE E OVR NT2 INADV OF COMPLEX AREA OF LOW PRES THAT WILL DEVELOP OFF THE E CST IN THE 24-48 HR TIME PERIOD. THE FRIST LOW CENTER WILL FORM OFF THE JERSEY CST TOMORROW MORNING AND TRACK NE TO A PSN JUST E OF CAPE COD BY WED MORNING. AT THE SAME TIME A LOW CENTER CURRENTLY SITUATED OVER THE GREAT LAKES WILL MOVE OVR WESTERN NEW YORK STATE TOMORROW MONING...THEN THE ENERGY WILL TRANSFER SE OFF THE DELMARVA CST BY WED MORNING. FROM 48-72 THE TWO LOW CENTERS WILL CONSOLIDATE INTO ONE AREA OF LOW PRES E OF LONG ISLAND. THE GLOBAL MODELS ARE IN PRETTY GOOD AGREEMENT IN THE GRAND SCHEME OF THINGS...EVEN THOUGH THEY MAY TAKE SLIGHTLY DIFFERENT WAYS TO GET THERE. FOR THE PURPOSES OF POP THE GRIDS I WILL INTIALLY USE THE 10M GFS THROUGH 18Z WED...THEN I WILL TRANSITION TO THE 30M GFS FOR ALL AREAS...EXCEPT FOR THE GULF OF MAINE WHERE I WILL CONTINUE TO USE THE 10M WINDS. I FEEL PRETTY CONFIDENT AT GALES WILL OCCUR IN THE GULF OF MAINE BY 72 HRS...WITH A MODERATE LEVEL OF CONFIDENCE GALES WILL OCCUR AS EARLY AS 48 HRS. GALES ARE ALSO A STRONG POSSIBILITY TO OCCUR ON DAY 4 IN THE W-SW FLOW OVER THE GULF STREAM AS 30 KT BL WINDS ASCROSS STREAM LIKELY TO PRODUCE SMALL AREA OF GALES ACROSS PTNS OF NRN NT2 WATERS. SEAS...WILL POP WITH THE ECMWF WAVE GUID AS SEAS ARE BETTER REPRESENTED IN THE NW FLOW...WILL BUMP UP SEAS A BIT IN GULF OF MAINE TO MATCH WIND GRIDS. .EXTRATROPICAL STORM SURGE GUIDANCE...THE SURGE HGTS LOOK REASONABLE...ALTHOUGH ETSS APPEARS SLIGHTLY TOO LOW GIVEN THE CURRENT FCST SCENERIO. .WARNINGS...PRELIMINARY. .NT1 NEW ENGLAND WATERS... .ANZ800...GULF OF MAINE... GALE POSSIBLE WED INTO THU. .NT2 MID ATLC WATERS... .ANZ920...BALTIMORE CANYON TO THE GREAT SOUTH CHANNEL... GALE POSSIBLE THU NIGHT. .ANZ910...EAST OF THE GREAT SOUTH CHANNEL AND SOUTH OF 39N... GALE POSSIBLE THU NIGHT. .ANZ925...OUTER WATERS FROM BALTIMORE CANYON TO HATTERAS CANYON... GALE POSSIBLE THU NIGHT. $$ .FORECASTER SHAW. OCEAN PREDICTION CENTER.

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