000 AGXX40 KNHC 060700 MIMATS MARINE WEATHER DISCUSSION NWS NATIONAL HURRICANE CENTER MIAMI FL 300 AM EDT MON APR 6 2015 MARINE WEATHER DISCUSSION FOR THE GULF OF MEXICO...CARIBBEAN SEA AND TROPICAL N ATLANTIC FROM 07N TO 19N BETWEEN 55W AND 64W...AND THE SW N ATLANTIC INCLUDING THE BAHAMAS. ...GULF OF MEXICO... MODEL PREFERENCE: LATEST GFS BLENDED WITH PREVIOUS FORECAST. NWPS USED FOR WAVE PARAMETERS. HIGH CONFIDENCE. A WEAKENING FRONTAL BOUNDARY REMAINS STALLED ALONG THE NW AND N CENTRAL GULF COAST WITH SCATTERED SHOWERS AND PATCHY DENSE FOG NEAR THE BOUNDARY. OBSERVATIONS INDICATE MODERATE E-SE WINDS ACROSS THE BASIN...EXCEPT JUST OFFSHORE OF THE YUCATAN PENINSULA WHERE SCATTEROMETER DATA SHOWS FRESH TO LOCALLY STRONG NE-E WINDS. BUOYS AND SHIPS REPORT 1-3 FT SEAS IN THE NE GULF WITH 3-5 FT ELSEWHERE. THE FRONT WILL BECOME ILL-DEFINED AND DIFFUSE THROUGH THE DAY WITH MODERATE TO LOCALLY FRESH RETURN FLOW DOMINATING THROUGH THE FORECAST PERIOD...EXCEPT PULSING TO STRONG ALONG AND OFF THE COAST OF THE YUCATAN DURING THE LATE NIGHT AND EARLY MORNING HOURS THROUGH THE WEEK. LITTLE CHANGE IN SIGNIFICANT WAVE HEIGHTS IS EXPECTED EXCEPT SEAS WILL OCCASIONALLY BUILD TO 6 FT IN THE CENTRAL AND NW GULF WHERE THE FETCH LENGTH WILL BE THE GREATEST. ...CARIBBEAN SEA AND TROPICAL N ATLANTIC FROM 07N TO 19N BETWEEN 55W AND 64W... MODEL PREFERENCE: LATEST GFS BLENDED WITH PREVIOUS FORECAST. NWPS USED FOR WAVE PARAMETERS. HIGH CONFIDENCE. RECENT ASCAT AND ASCAT-B PASSES SHOWED WINDS NEAR GALE FORCE RIGHT NEAR THE NW COAST OF COLOMBIA WITH A TIGHT PRESSURE GRADIENT IN PLACE DUE TO RIDGING N OF THE AREA AND LOW PRESSURE ACROSS INTERIOR COLOMBIA. A SURROUNDING AREA OF FRESH TO STRONG WINDS COVERS THE S CENTRAL CARIBBEAN WITH MAINLY MODERATE TO LOCALLY FRESH TRADES ELSEWHERE ACROSS THE BASIN. WINDS WILL PULSE TO FRESH TO STRONG LEVELS IN AND DOWNWIND OF THE WINDWARD PASSAGE AND IN THE LEE OF THE DOMINICAN REPUBLIC FOR THE NEXT SEVERAL DAYS. WINDS NEAR THE COAST OF COLOMBIA ARE FORECAST TO PULSE TO GALE FORCE DURING THE OVERNIGHT HOURS MON NIGHT INTO EARLY TUE...WITH ANOTHER ROUND EXPECTED THE FOLLOWING NIGHT AND EARLY MORNING. SEAS MEANWHILE WILL BUILD TO 10-14 FT DURING THE GALE FORCE WINDS WITH A SURROUNDING AREA OF 7-10 FT SEAS IN THE S CENTRAL CARIBBEAN...WITH 4-6 FT EXPECTED ELSEWHERE ACROSS THE BASIN. OTHERWISE LITTLE CHANGE IN SENSIBLE WEATHER CONDITIONS IS ANTICIPATED THROUGH THE NEXT SEVERAL DAYS. ...SW N ATLANTIC INCLUDING THE BAHAMAS... MODEL PREFERENCE: LATEST GFS BLENDED WITH PREVIOUS FORECAST. NWPS USED FOR WAVE PARAMETERS. HIGH CONFIDENCE. A STATIONARY FRONT EXTENDS FROM 30N65W TO NEAR MELBOURNE FLORIDA WITH MODERATE TO FRESH NE-E WINDS N OF THE BOUNDARY. THIS FRONT WILL DISSIPATE DURING THE NEXT 24 HOURS OR SO. A SURFACE TROUGH IS JUST TO THE E OF 65W WITH ISOLATED SHOWERS OCCURRING NEAR IT. MODERATE NE-E WINDS ARE W OF THE TROUGH. LATEST OBSERVATIONS SHOW SEAS OF 5-8 FT OUTSIDE OF THE BAHAMAS AND 1-3 FT INSIDE THE BAHAMAS. THE TROUGH IS FORECAST TO DRIFT TO THE W THROUGH THE WEEK... EXITING THE ATLC ON THU. HIGH PRES RIDGING WILL BUILD DOWN FROM THE NE IN THE WAKE OF THE TROUGH WITH MODERATE TO LOCALLY FRESH EASTERLY FLOW ANTICIPATED THROUGH THE WEEK INTO THE EARLY PART OF THE WEEKEND. SEAS WILL BE 4-7 FT WITH THE HIGHEST WINDS AND SEAS EXPECTED S OF 22N WHERE THE PRESSURE GRADIENT WILL BE THE TIGHTEST. $$ .WARNINGS...ANY CHANGES IMPACTING COASTAL NWS OFFICES WILL BE COORDINATED THROUGH AWIPS 12 PLANET CHAT OR BY TELEPHONE: .GULF OF MEXICO... NONE. .CARIBBEAN SEA AND TROPICAL N ATLANTIC FROM 07N TO 19N BETWEEN 55W AND 64W... .AMZ031...CARIBBEAN FROM 11N TO 15N BETWEEN 72W AND 80W INCLUDING COLOMBIA BASIN... GALE WARNING TONIGHT INTO TUE. GALE CONDITIONS POSSIBLE TUE NIGHT INTO WED. .SW N ATLANTIC INCLUDING THE BAHAMAS... NONE. $$ *FOR DETAILED ZONE DESCRIPTIONS PLEASE VISIT: HTTP://WWW.NHC.NOAA.GOV/ABOUTTAFBPROD.SHTML#OWF NOTE: GRIDDED MARINE FORECASTS ARE AVAILABLE IN THE NATIONAL DIGITAL FORECAST DATABASE (NDFD) AT: HTTP://WWW.NHC.NOAA.GOV/MARINE/GRIDS.PHP FOR ADDITIONAL INFORMATION PLEASE VISIT: HTTP://WWW.HURRICANE WARNINGS.GOV/MARINE $$ .FORECASTER LEWITSKY. NATIONAL HURRICANE CENTER.