000 AGXX40 KNHC 041730 MIMATS MARINE WEATHER DISCUSSION NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL 130 PM EDT SAT JUL 04 2009 MARINE WEATHER DISCUSSION FOR THE GULF OF MEXICO...CARIBBEAN SEA AND SOUTHWEST NORTH ATLC S OF 31N W OF 55W. UPPER LEVELS... DEEP LAYER TROUGH EXTENDS ACROSS CENTRAL FLORIDA TO SE TEXAS COAST BRINGING DRY STABLE AIR MASS TO MOST OF GULF OF MEXICO NORTHERN HALF. TROUGH WILL FORCE MID/UPPER LEVEL ATLC RIDGE FURTHER E EASING PRES GRADIENT OVER TROPICAL ATLC AND EASTERN CARIBBEAN HELPING DIMINISH WINDS BY SECOND HALF OF FORECAST PERIOD. TROUGH FORECAST TO WEAKEN AS CARIBBEAN MID/UPPER RIDGE RECLAIMS THE LOWER LATITUDES. SURFACE... WEAK COLD FRONT ACROSS N FLORIDA SHOULD STALL HALFWAY ALONG PENINSULA AND STRETCH TO SE TEXAS BY SUN. ATLC RIDGE EXTENDING FROM 28N60W TO STRAITS OF FLORIDA THEN TO 25N90W WEAKEN AS FRONT FORCES ATLC CENTER FURTHER E EASING PRES GRADIENT OVER EASTERN CARIBBEAN AND TROPICAL ATLC SECTIONS. SERIES OF WEAK SURFACE TROUGHS SLIDE JUST N OF 31N THROUGH PERIOD INCREASING SW WINDS N OF 28N-29N. TROPICAL WAVES ALONG 88W...69W AND 64W REMAIN AS ONLY OTHER SURFACE FEATURES MAKING IMPACT ON MARINE WEATHER CONDITIONS. WARNINGS ATLC... .NONE. CARIBBEAN... .NONE. GULF OF MEXICO... .NONE. FORECASTER WALLY BARNES. TROPICAL PREDICTION CENTER.