000 AGXX40 KNHC 021746 MIMATS MARINE WEATHER DISCUSSION NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL 200 PM EDT WED JULY 2 2008 MARINE WEATHER DISCUSSION FOR GULF OF MEXICO...CARIBBEAN SEA AND SOUTHWEST NORTH ATLC S OF 31N W OF 55W. THE SFC HIGH PRESSURE CENTER OVER THE CENTRAL N ATLC IS EXPECTED TO SHIFT NORTHWARD AND SPLIT BY SUN AS AN UPPER LOW CURRENTLY NEAR 25N67W STRENGTHENS AND PUSHES NORTHEASTWARD WEAKENING THE RIDGE AT THE SFC. THE SFC HIGH OVER THE WESTERN ATLC SHOULD RELOCATE W OF 60W ON SUN. DESPITE THIS...MODERATE EASTERLY TRADE WINDS WILL CONTINUE TO DOMINATE THE SWRN N ATLC THROUGH MUCH OF THE PERIOD. HOWEVER...A LOW PRESSURE CENTER...CURRENTLY NEAR 11N20W...IS EXPECTED TO PUSH W OF 40W ON SUN...SHIFTING THE WINDS MORE NORTHEASTERLY IN THE FAR SOUTHEASTERN EDGE OF THE FORECAST AREA SUN AND MON. ELSEWHERE...LOOK FOR THE TRPCL WAVE ALONG 58W TO PUSH THROUGH THE ISLANDS OVERNIGHT TONIGHT WITH THE WAVE LOCATED ALONG 47W TO MOVE THROUGH THE ISLANDS ON SAT AND THE WAVE AT 38W TO MOVE PAST 55W AT THE END OF THE PERIOD. THE UPPER TROUGH OVER THE EASTERN CONUS IS CURRENTLY LIFTING NORTHEASTWARD...WEAKENING THE SFC FRONTAL SYSTEM OVER THE NORTHERN GULF OF MEXICO. THE REGION SHOULD RETURN TO A FLOW REGIME DOMINATED BY THE RIDGE BUILDING ALONG 29N OVERNIGHT TONIGHT. THE RELOCATION OF THE N CENTRAL ATLC HIGH WILL MAKE FOR LITTLE CHANGE IN THE EASTERLY TO SOUTHEASTERLY FLOW OVER THE GULF OF MEXICO THROUGH THE PERIOD...BUT LOOK FOR A SERIES OF TROPICAL WAVES TO IMPACT THE SOUTHERN GULF OF MEXICO AS THEY PASS SOUTH OF THE RIDGE...WITH THE LEAD WAVE PASSING THROUGH THE BAY OF CAMPECHE TONIGHT...ANOTHER MOVING THROUGH THE SOUTHERN GULF THU THROUGH SAT AND A THIRD...CURRENTLY ALONG 58W...MOVING INTO THE SOUTHEASTERN GULF BY THE END OF THE PD. STRONG EASTERLY TRADE WINDS THAT HAVE BEEN ACROSS THE CARIBBEAN THE LAST SEVERAL DAYS WILL DIMINISH TO 15 TO 20 KT AS THE ATLC RIDGE LIFTS N....BUT LOOK FOR THE PRESSURE GRADIENT TO INCREASE AGAIN EARLY NEXT WEEK AS THE HIGH SHIFTS W. THREE TROPICAL WAVES S OF 15N WILL IMPACT THE REGION...WITH THE WESTERN-MOST CURRENTLY ALONG 74W TO MOVE THROUGH THE WESTERN CARIBBEAN BY THE WEEKEND. THE WAVE ALONG 58W SHOULD PUSH W THROUGH THE CARIBBEAN THROUGH THE PERIOD WHILE A THIRD WAVE...CURRENTLY ALONG 47W...WILL ENTER THE CARIBBEAN ON SAT. ATLANTIC... .NONE. CARIBBEAN... .NONE. GULF OF MEXICO... .NONE. .FORECASTER SCHAUER CLARK. TROPICAL PREDICTION CENTER.