Marine Interpretation Message
Issued by NWS

Home | Current Version | Previous Version | Text Only | Print | Product List | Glossary On
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
000
AGNT40 KWNM 291156
MIMATN

MARINE WEATHER DISCUSSION FOR N ATLANTIC OCEAN
NWS OCEAN PREDICTION CENTER WASHINGTON DC
756 AM EDT SUN MAR 29 2015

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

SUMMARY...LOW PRES WILL FORM ALG A COLD FRONT E OF THE NRN NT2 WTRS
TODAY...THEN MOVE OFF TO THE E TONITE. A TROF WILL PASS SE OVER
THE NRN NT2 WTRS TODAY. A HI PRES RIDGE WILL BUILD OFSHR TODAY
AND TONITE...THEN PASS SE OF THE OFSHR WTRS MON. ANOTHER COLD
FRONT WILL PASS SE ACROSS THE WATERS LATER MON INTO EARLY TUE.
ANOTHER RIDGE WILL PASS E OVER THE WATERS TUE. A DVLPG LOW WILL
MOVE OFF THE MID ATLC COAST TUE NITE...PASS E ACROSS THE NRN NT2
WTRS WED...THEN MOVE OFF TO THE NE LATE WED AND WED NITE WHILE
INTENSIFYING. A THIRD RIDGE WILL BUILD OFSHR LATE WED AND WED
NITE...THEN MOVE E ACROSS THE WATERS THU INTO THU NITE. A WARM
FRONT WILL LIFT NE ACROSS THE NT1 AREA THU NITE...AS A THIRD COLD
FRONT MOVES E AND APRCHS THE NEW ENG AND MID ATLC COASTS.

MODELS...THE GEM IS TOO SLOW WITH THE DVLPG LOW FOR TUE NITE THRU
WED NITE...AND THE UKMET IS A BIT TOO FAST WITH THE RIDGE ON
THU...BUT OTHW THE MED RNG MDLS ARE IN VRY GUD OVERALL AGREEMNT
FOR TODAY THRU THU. THE REPRESENTATIVE GFS 30M SOLN WILL BE USED
TO POPULATE THE WIND GRIDS THRU THU. GEM/GFS ARE SIGNIF FASTER
THAN THE ECMWF/UKMET WITH A PROGRESSIVE COLD FRONT THAT WILL APRCH
THE E COAST LATE THU AND THU NITE...SO WILL GO WITH A 50/50 BLEND
OF THE ECMWF/GFS AS A COMPRIMISE SOLN DURING THIS TIMEFRAME.

.SEAS...THE MULTIGRID WW3 MDL AND ECMWF WAM BOTH INITIALIZED WELL
OVER THE OFSHR WTRS. THE MDLS ARE IN VRY GUD AGREEMNT INTO TUE
AFTN...AND WILL USE THE MWW3 GUIDANCE FOR THE SEA HT GRIDS FOR
THIS TIMEFRAME. MWW3 IS SVRL FEET HIGHER WITH THE SEAS OVER THE
NRN AND CNTRL NT2 WTRS FOR TUE NITE AND WED...WHILE THE ECMWF WAM
IS HIGHER WITH THE SEAS ACROSS PARTS OF THE NT1 WTRS THU AND THU
NITE. WILL USE A 50/50 BLEND OF THE MWW3/ECMWF WAM FOR THE LATE
TUE THRU THU NITE PRD IN ORDER TO SMOOTH OUT THESE MDL DIFFS.

.EXTRATROPICAL STORM SURGE GUIDANCE...ESTOFS CONTS TO FCST A NEG
SURGE OF 1.0 TO 1.5 FT ALONG THE MID ATLC COAST FOR MON NITE INTO
TUE. THE ETSS HAS CORRESPONDING NEG SURGE VALUES OF 1.0 FT OR
LESS.

.WARNINGS...PRELIMINARY.

.NT1 NEW ENGLAND WATERS...
.ANZ800...GULF OF MAINE...
     GALE POSSIBLE THU NIGHT.
.ANZ805...GEORGES BANK WEST OF 68W...
     GALE POSSIBLE THU NIGHT.
.ANZ900...GEORGES BANK EAST OF 68W...
     GALE POSSIBLE THU NIGHT.
.ANZ810...SOUTH OF NEW ENGLAND...
     GALE MON NIGHT.
.ANZ815...SOUTH OF LONG ISLAND...
     GALE MON INTO MON NIGHT.

.NT2 MID ATLC WATERS...
.ANZ820...HUDSON CANYON TO BALTIMORE CANYON...
     GALE MON.
     GALE POSSIBLE TUE NIGHT.
.ANZ915...HUDSON CANYON TO THE GREAT SOUTH CHANNEL...
     GALE TODAY.
     GALE MON INTO MON NIGHT.
.ANZ920...BALTIMORE CANYON TO THE GREAT SOUTH CHANNEL...
     GALE TODAY INTO MON NIGHT.
     GALE POSSIBLE TUE NIGHT.
.ANZ905...THE GREAT SOUTH CHANNEL TO THE HAGUE LINE...
     GALE POSSIBLE THU NIGHT.
.ANZ910...EAST OF THE GREAT SOUTH CHANNEL AND SOUTH OF 39N...
     GALE MON NIGHT.
     GALE POSSIBLE TUE NIGHT.
.ANZ825...INNER WATERS FROM BALTIMORE CANYON TO CAPE CHARLES LIGHT...
     GALE MON.
     GALE POSSIBLE TUE NIGHT.
.ANZ828...INNER WATERS FROM CAPE CHARLES LIGHT TO CURRITUCK BEACH LIGHT...
     GALE MON.
     GALE POSSIBLE TUE NIGHT.
.ANZ925...OUTER WATERS FROM BALTIMORE CANYON TO HATTERAS CANYON...
     GALE MON.
     GALE POSSIBLE TUE NIGHT.

$$

.FORECASTER SCOVIL. OCEAN PREDICTION CENTER.



USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.