Marine Interpretation Message
Issued by NWS

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AGNT40 KWNM 271926
MIMATN

MARINE WEATHER DISCUSSION FOR N ATLANTIC OCEAN
NWS OCEAN PREDICTION CENTER WASHINGTON DC
326 PM EDT SUN JUL 27 2014

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

UPDATED TO MENTION THE HIGHER SEAS NR AND S OF THE GULF STREAM IN
SEAS SECTION BELOW...

SUMMARY...THE MAIN CONCERN OVR THE OFF WTRS FOR THE NEXT FEW DAYS
WILL BE THE LOCALLY VRY GUSTY WINDS AND VRY ROUGH SEAS IN AND
NEAR SCTD TO NUMEROUS TSTMS OVR THE WTRS. WIND GUSTS EXCEEDING
GALE FORCE ARE LKLY IN/NR THE HEAVIER TSTMS. THE LATEST RADAR...
SATELLITE...AND LIGHTNING DATA INDICATES TSTMS WEAKENING FROM ERN
NORTH CAROLINA NE TOWARD THE GULF OF MAINE. SEVERE TSTMS ARE
NOTED INLAND OVR THE OHIO VALLEY. THESE TSTMS ARE ASSOC WITH A
STRONG COLD FRONT MOVG E TOWARD THE OFF WTRS. THE FRONT IS STILL
FCST TO NR THE COAST MON...AND THEN PUSH E OVR THE WTRS MON NGT
INTO TUE NGT. THE BEST CHANCE FOR TSTMS WILL BE AHEAD OF AND NR
THE FRONT TNGT THRU MON INTO TUE NGT. SHWRS AND TSTMS MAY LINGER
NR THE FRONT AS IT STALLS AND WEAKENS ACROSS THE WTRS WED THRU
FRI NT. WEAK LOW PRES AREAS MAY PERIODICALLY FORM ALONG THE FRONT
BY MID AND LATE WK. THESE LOW PRES AREAS MAY PRODUCE OCCASIONAL
INCREASES IN TSTM ACTIVITY OVR THE WTRS DURING THE WK. OVRALL...
THERE WILL BE NO MAJOR CHANGES TO THE PREV FEW OPC FCSTS FOR THE
AFTN FCST PACKAGE.

MODELS...THE 12Z MDLS REMAIN VRY PRETTY DECENT AGREEMENT OVR THE
OFF WTRS THIS AFTN. THE 12Z GFS MAY BE A TAD TOO DEEP WITH LOW
PRES MOVG NE OVR NEW ENGLAND MON...BUT THIS WILL LKLY HAVE NO SIG
IMPACT ON THE FCST WINDS OVR THE OFF WTRS THRU THE NEXT 24-48 HRS.
WE WILL CONT TO FOLLOW THE 10M GFS WINDS OVR THE COOLER SSTS N OF
THE GULF STREAM...AND USE THE 30M GFS WINDS NR AND S OF THE
STREAM MAINLY TNGT THRU TUE. THE 12Z ECMWF...12Z UKMET...12Z
CANADIAN GLBL MDLS ALL SUPPORT THE 12Z GFS THRU THE PD. MAX WINDS
TO 30 KT ARE STILL FCST AHEAD OF THE COLD FRONT MON INTO MON
NGT...AGAIN WITH WINDS NR AND OVR GALE FORCE IN/NR THE HEAVIER
TSTMS TNGT THRU AT LEAST TUE.

SEAS...THE WNA AND MULTIGRID VERSIONS OF THE WW3 INITIALIZED WELL
OVR WELL OVR MOST OF THE OFF WTRS PER THE 18Z RA1 SEA STATE
ANALYSIS. THE MDL GUID IS ABOUT A FT OR TWO ON THE LOW SIDE OVR
THE GULF OF MAINE. WE WILL MAKE ADJUSTMENTS UPWARD TO THE MDL
INITIALLY AS A RESULT OVR THE GULF OF MAINE. OTW...WE WILL STAY
CLOSE TO THE WW3 MDL THRU THE FCST PD...EXCEPT TO BLEND WITH THE
HIGHER ECMWF WAM WV GUID LT TNGT INTO TUE NGT AS IT TENDS TO
BUILD SEAS IN THE S-SW FLOW FASTER AND MORE ACCURATELY THAN THE
WW3 ESPEC OVR THE WARMER SSTS NR AND S OF THE GULF STREAM.

.EXTRATROPICAL STORM SURGE GUIDANCE...NA


.WARNINGS...PRELIMINARY.

.NT1 NEW ENGLAND WATERS...
     NONE.

.NT2 MID ATLC WATERS...
     NONE.

$$

.FORECASTER MILLS. OCEAN PREDICTION CENTER.


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