000
AGXX40 KNHC 211724
MIMATS

MARINE WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
124 PM EDT TUE APR 21 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: GFS BLENDED WITH PREVIOUS OFFICIAL. BLENDED
MWW3 WITH PREVIOUS OFFICIAL FOR WAVES. HIGH CONFIDENCE.

AGRICULTURE SMOKE INDICATED ON VISIBLE SATELLITE IMAGERY ACROSS
THE SW GULF. A WEAK COLD FRONT EXTENDS FROM TAMPA BAY TO 26N89W
THEN STATIONARY TO THE TEXAS MEXICO BORDER. THE COLD FRONT WILL
MOVE E OF THE AREA TONIGHT WHILE THE STATIONARY FRONT DISSIPATES
ACROSS THE CENTRAL PORTION OF THE AREA. WEAK HIGH PRESSURE WILL
BUILD IN THE WAKE OF THE FRONT AND PREVAIL THROUGH SAT NIGHT. A
SURFACE TROUGH WILL SHIFT W OFF THE YUCATAN PENINSULA EACH
NIGHT...MOVE W ACROSS THE SW WATERS DURING THE EARLY MORNING HOURS
AND DISSIPATE BY MIDDAY. WINDS WILL REMAIN 15 KT OR LESS THROUGH
THE FORECAST PERIOD...EXCEPT ELY INCREASING TO 15-20 KT ACROSS THE
E BAY OF CAMPECHE FRI THROUGH SAT NIGHT.
 
...CARIBBEAN SEA AND TROPICAL N ATLANTIC FROM 07N TO 19N BETWEEN 
55W AND 64W...

MODEL PREFERENCE: GFS BLENDED WITH PREVIOUS OFFICIAL. BLENDED
MWW3 WITH PREVIOUS OFFICIAL FOR WAVES. HIGH CONFIDENCE.

ATLC RIDGING N OF THE AREA...COMBINED WITH LOW PRES OVER NW 
COLOMBIA...WILL SUPPORT 20-25 KT NE WINDS NEAR THE NW COAST OF
COLOMBIA TONIGHT AND WED...THEN THE AFFECTED AREA SHOULD SHRINK.
E-SE TRADES WILL INCREASE TO 20-25 KT ACROSS THE GULF OF HONDURAS
EACH NIGHT WITH SEAS BUILDING TO 9 FT. MODERATE TO FRESH TRADES
EXPECTED ELSEWHERE. N SWELL RESULTING IN 7-8 FT COMBINED SEAS
EXTEND W ACROSS THE TROPICAL ATLC WATERS S OF 15N. THESE
CONDITIONS WILL SUBSIDE THIS EVENING OT LESS THAN 8 FT. THE NEXT
ROUND OF NNE SWELL WILL REACH 19N55W LATE WED NIGHT WITH SEAS UP
TO 8 FT AGAIN BY THU...WITH THESE CONDITIONS REACHING NEAR THE E
CARIBBEAN PASSAGES THU EVENING...AND CONTINUING THROUGH EARLY
FRI...THEN SUBSIDING FROM THE N ON FRI NIGHT AND SAT.

 ...SW N ATLANTIC INCLUDING THE BAHAMAS...

MODEL PREFERENCE: GFS BLENDED WITH PREVIOUS OFFICIAL. BLENDED
MWW3 WITH PREVIOUS OFFICIAL FOR WAVES. HIGH CONFIDENCE.

A COLD FRONT FROM 31N80W TO THE N FLORIDA COAST WILL EXTEND FROM
BERMUDA TO CENTRAL FLORIDA TONIGHT...THEN STALL FROM 31N55W TO
25N70W ON WED...AND DISSIPATE THROUGH THU. A SECOND COLD FRONT
WILL OFF THE NE FLORIDA COAST LATE THU AND EXTEND FROM BERMUDA TO
THE CENTRAL BAHAMAS LATE FRI THEN STALL AND DISSIPATE ALONG 26N
ON SAT. SOUTHERLY WINDS WILL INCREASE ACROSS THE NW PORTION OF
THE AREA FRI NIGHT AHEAD OF A THIRD COLD FRONT MOVING OFF THE NE
FLORIDA COAST ON SAT LATE AND EXTENDING FROM BERMUDA TO THE NW
BAHAMAS EARLY SUN.

$$

.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...
     NONE.

.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 DGS. NATIONAL HURRICANE CENTER.