Marine Interpretation Message
Issued by NWS

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000
AGNT40 KWNM 260845
MIMATN

MARINE WEATHER DISCUSSION FOR N ATLANTIC OCEAN
NWS OCEAN PREDICTION CENTER WASHINGTON DC
345 AM EST FRI DEC 26 2014

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

THERE WAS AN HIGH RESOLUTION ASCAT PASS FM ABT 02Z WITH A SWATH
OVR THE ERN AREAS OF THE OFFSHR WTRS WHICH COVERED THE ERN NEW
ENGLAND WTRS INTO THE NRN MID ATLC AND ALL E OF 70W. THE STGST
WINDS WERE TO 30 KT OVR THE GLF OF ME AND OVR GEORGES BANK AND NRN
MID ATLC WTRS. THERE WERE A FEW 35 KT OVR THE FAR ERN AREAS OF THE
SWATH NR 42N/65W AND E OF THE OFFSHR WTRS.

FOR TDA A BROAD AREA OF HIGH PRES NOW OVR THE INLAND AREAS OF MID
ATLC STATES INTO THE SERN US MOVS EWD INTO THE OFFSHR WTRS LATER
TDA AND OVERSPREADS ALL OF THE WTRS TNGT AND SAT. ON SAT NGT INTO
SUN LOW PRES MOVS E OVR ERN QUEBEC INTO CANADIAN MARITIMES. THE
GFS IS SOMEWHAT FASTER WITH THE LOW PRES AND IS FASTER WITH FNT
CROSSING THE WTRS WITH THE GEM/UKMET SLOWER. THE 12Z VERSION OF
THE ECMWF WAS ALSO SLOWER AS IS 00Z ECMWF WHICH IS STARTING TO
COME IN. WL LIKELY GO WITH A SLOWER SLN...AND WL LIKELY USE THE
00Z ECMWF GUID. BY SUN NGT GFS DVLPS LOW PRES ALG THE FNT OVR THE
NRN MID ATLC WTRS HOWEVER OTHER GUID DOES NOT AGREE WITH TIMING.
THE UKMET DOES AGREE THAT SYS WL STRENGTHEN AS IT MOVS E ALG THE
FNT MON...ALTHO NOT AS QUICK AS GFS. AGAIN PREFER A SLOWER SLN AND
00Z ECMWF LOOKS SMLR TO UKMET WITH TIMING AND STRENGTHENING SO WL
LIKELY USE A SLOWER MDL SLN. MDLS DO SHOW ANOTHER LOW PRES MOVG E
ALG THE FNT ON TUE...ALTHO FOR THIS SYS GFS IS SLOWER AND WKR THAN
UKMET. THE 00Z ECMWF LOOKS SMLR TO GFS GUID AND PLAN TO USE ECMWF
FOR GRIDS FOR THIS TIME PD.

.GRIDS...PLAN TO USE THE GFS MDL OUTPUT THRU 00Z SAT...THEN FAVOR
THE ECMWF WITH ITS SLOWER SLN THERAFT.

.SEAS...THE 00Z MULTIGRID WWIII GUID LOOKS OK WHEN COMPARED 06Z
BUOY OBS AND SHIP OBS. PLAN TO USE THE WWIII THRU SAT NGT...THEN
USE ECMWF WV GUID THEREAFT WITH ECMWF SVRL FT HIGHER WITH LOW PRES
CNTRS THAT CROSS WTRS.

.EXTRATROPICAL STORM SURGE GUIDANCE...THE LATEST 00Z ESTOFS AND
ETSS MDLS CONT TO SHOW A NEG SURGE UP TO ABT 1.5 FT DVLPG FROM THE
NRN MID ATLC N TO THE GULF OF MAINE TDA WITH ESTOFS VALUES
SLIGHTLY HIER AND EXTENDING FM NR CAPE COD AND S INTO THE MID
ATLC. OVERALL...GFS LOOKS OK INIT AND LITTLE DEVIATION FM THE
ESSG APPEARS NEEDED.

.WARNINGS...PRELIMINARY.

.NT1 NEW ENGLAND WATERS...
     NONE.

.NT2 MID ATLC WATERS...
.ANZ920...BALTIMORE CANYON TO THE GREAT SOUTH CHANNEL...
     GALE POSSIBLE MON.
.ANZ910...EAST OF THE GREAT SOUTH CHANNEL AND SOUTH OF 39N...
     GALE POSSIBLE MON.
.ANZ925...OUTER WATERS FROM BALTIMORE CANYON TO HATTERAS CANYON...
     GALE POSSIBLE MON.

$$

.FORECASTER ROWLAND. OCEAN PREDICTION CENTER.



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