000 AGXX40 KNHC 210651 MIMATS MARINE WEATHER DISCUSSION NWS NATIONAL HURRICANE CENTER MIAMI FL 250 AM EDT TUE JUN 21 2011 GULF OF MEXICO... A RIDGE OF HIGH PRESSURE WILL CONTINUE OVER THE NORTHERN GULF TODAY BEFORE SHIFTING N OF THE AREA BY TONIGHT. SE TO S RETURN FLOW WILL CONTINUE OVER THE FAR NW GULF THROUGH THE FORECAST PERIOD. TROPICAL WAVE OVER THE SW CARIBBEAN HAS SHIFTED INLAND OVER EASTERN MEXICO. ATLC RIDGE STRENGTHENS SOME ON SAT...THIS COMBINED WITH LOWER PRES OVER MEXICO INCREASES THE WINDS TO 20-25 KT ACROSS THE SW GULF ON SAT. SW N ATLC... A RIDGE OF HIGH PRESSURE WILL PREVAIL ALONG 27N FOR MUCH OF THE FORECAST PERIOD. WINDS HAVE FRESHENED OVER THE NORTHERN PART OF THE AREA DUE TO A TIGHTER PRESSURE GRADIENT BETWEEN THE RIDGE AND LOW PRESSURE N OF THE AREA. THE FRESH WINDS WILL SPREAD W TO E TROUGH WED AS THE LOW SHIFTS EASTWARD. WINDS WILL THEN DECREASE OVER THE N PART OF THE AREA AS THE LOW SHIFTS FURTHER FROM THE AREA. OTHERWISE LIGHT TO MODERATE WINDS WILL CONTINUE OVER MUCH OF THE AREA THROUGH SAT. ONE EXCEPTION WILL BE OVER THE FAR S PART OF THE AREA WHERE WINDS WILL FRESHEN TOWARD THE END OF THE WEEK AS A TROPICAL WAVE MOVES INTO THE CARIBBEAN SEA TIGHTENING THE PRESSURE GRADIENT. CARIBBEAN AND TROPICAL N ATLC W OF 55W... TROPICAL WAVE OVER THE CARIBBEAN IS HARD TO DETECT THROUGH OBSERVATIONAL DATA. UNIVERSITY AT ALBANY HOVMOLLER DIAGRAMS INDICATE THAT THE WAVE IS CONFINED MAINLY S OF 12N. THIS IS LIKELY DUE TO THE FAVORABLE WAVE GROWTH REGION BEING LOCATED OVER THE FAR S PART OF THE CARIBBEAN AND THE N PART OF S AMERICA. INDICATIONS ARE THAT THIS WAVE WILL BECOME ABSORBED INTO THE EASTERN EXTENT OF THE MONSOON TROUGH OVER THE SW CARIBBEAN ONCE IT MOVES OFF THE WESTERN COAST OF S AMERICA TONIGHT. THUS...HAVE REMOVED THE TROPICAL WAVE FROM THE SURFACE FORECAST CHARTS AND WILL REMOVE WORDING OF THIS WAVE FROM THE OFFSHORE AND HIGH SEAS FORECAST. A TROPICAL WAVE E OF THE AREA WILL MOVE INTO THE TROPICAL N ATLC EARLY WED. THIS WAVE WILL MOVE INTO THE E CARIBBEAN EARLY THU AND THE CENTRAL CARIBBEAN EARLY FRI WHERE ITS WESTWARD PROGRESS WILL DECREASE AS IT STARTS TO INTERACT WITH THE MONSOON TROUGH OVER THE SW CARIBBEAN. A SECOND TROPICAL WAVE WILL MOVE INTO THE TROPICAL N ATLC SAT. WARNINGS... ATLC... .NONE. CARIBBEAN... .NONE. GULF OF MEXICO... .NONE. FOR ADDITIONAL INFORMATION PLEASE VISIT HTTP://WWW.HURRICANES.GOV/MARINE $$ FORECASTER AL