000 AGXX40 KNHC 210702 MIMATS MARINE WEATHER DISCUSSION NWS NATIONAL HURRICANE CENTER MIAMI FL 302 AM EDT TUE JUL 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/ECMWF BLEND. HIGH CONFIDENCE. A WEAK RIDGE EXTENDS ACROSS THE GULF OF MEXICO ALONG 26N FROM S FLORIDA TO SOUTHERN TEXAS. MODEL GUIDANCE INDICATES THE RIDGE WILL REMAIN FIRMLY ENTRENCHED ALONG 26-27N FOR SEVERAL MORE DAYS WELL INTO THE WEEKEND. LIGHT TO GENTLE WINDS ARE EXPECTED WITHIN 60-90 NM OF THE RIDGE AXIS...WITH GENTLE TO MODERATE WINDS ELSEWHERE. SEAS WILL REMAIN 4 FT OR LESS OVER THE ENTIRE REGION THROUGH THE WEEKEND...THE RESULT OF A STATIC PRESSURE PATTERN. ...CARIBBEAN SEA AND TROPICAL N ATLANTIC FROM 07N TO 19N BETWEEN 55W AND 64W... MODEL PREFERENCE: GFS/ECMWF BLEND. HIGH CONFIDENCE. SCATTEROMETER DATA SHOWED ONLY A SMALL AREA OF 20 KT WINDS OFF THE COAST OF NORTHERN COLOMBIA NEAR 12N75W. AS A RESULT...EXPECT SEAS ARE LESS THAN 8 FT IN THE SOUTH-CENTRAL CARIBBEAN THIS MORNING. SATELLITE-DERIVED TOTAL PRECIP WATER TPW IMAGERY SHOWS THREE TROPICAL WAVES MARCHING ACROSS THE DEEP TROPICS IN THE ATLC AND CARIBBEAN...BUT SCATTEROMETER DATA HAS NOT INDICATED MUCH OF A GRADIENT IN WIND SPEEDS ASSOCIATED WITH ANY OF THESE WAVES. MODEL GUIDANCE SHOWS A LOW NEAR THE PANAMA/COLOMBIA BORDER INTENSIFYING A LITTLE THU AND FRI WHILE THE ATLC RIDGE N OF THE AREA REMAINS UNCHANGED...ALLOWING WINDS IN THE S CENTRAL CARIBBEAN TO APPROACH 30 KT LATE THU. OTHERWISE HIGH PRES N OF THE AREA WILL MAINTAIN MODERATE TO FRESH TRADES IN THE REGION THROUGH THE WEEKEND. THE WAVE IN THE CENTRAL CARIBBEAN ALONG 71W WILL REACH THE W CARIBBEAN TONIGHT AND MOVE INTO CENTRAL AMERICA WED AND THU. A TROPICAL WAVE ALONG 64W IN THE EASTERN CARIBBEAN WILL REACH THE CENTRAL CARIBBEAN WED...AND MOVE INTO THE WESTERN CARIBBEAN THU. ANOTHER TROPICAL WAVE ALONG 53W WILL MOVE ACROSS THE TROPICAL N ATLC THROUGH TONIGHT REACH THE EASTERN CARIBBEAN WED AFTERNOON...AND MOVE INTO THE CENTRAL CARIBBEAN THU. ...SW N ATLANTIC INCLUDING THE BAHAMAS... MODEL PREFERENCE: GFS/ECMWF BLEND. HIGH CONFIDENCE. A RIDGE ALONG 26N TO THE FLORIDA STRAITS WILL SHIFT S TO NEAR 25N TONIGHT WITH LITTLE CHANGE EXPECTED THROUGH EARLY FRI...THEN RETREAT EASTWARD AND WEAKEN FRI NIGHT AND SAT AS WEAK LOW PRES MOVES OFF THE SE U.S. COAST. A TROUGH OVER NW WATERS TONIGHT AND WED WILL ALLOW SW WINDS TO INCREASE IN NORTHERN WATERS W OF 70W THROUGH WED NIGHT. THE NORTHERN PORTION OF A WEAK TROPICAL WAVE ALONG 64W WILL MOVE ACROSS SOUTHERN WATERS THROUGH THU TO BRING AN INCREASE IN DEEP LAYER MOISTURE AND RAIN CHANCES TO THE AREA BUT NOT MUCH IN THE WAY OF INCREASED WINDS OR COMBINED SEAS. $$ .WARNINGS...ANY CHANGES IMPACTING COASTAL NWS OFFICES WILL BE COORDINATED THROUGH AWIPS 12 PLANET CHAT OR BY TELEPHONE: .GULF OF MEXICO... NONE. .CARIBBEAN SEA AND TROPICAL N ATLANTIC FROM 07N TO 19N BETWEEN 55W AND 64W... NONE. .SW N ATLANTIC INCLUDING THE BAHAMAS... NONE. $$ *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 MUNDELL. NATIONAL HURRICANE CENTER.