000 AGXX40 KNHC 080457 MIMATS MARINE WEATHER DISCUSSION NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL 130 AM SAT JUL 08 2006 MARINE WEATHER DISCUSSION FOR GULF OF MEXICO...CARIBBEAN SEA AND SOUTHWEST NORTH ATLC S OF 31N W OF 55W. THE UPPER PATTERN TONIGHT IS CHARACTERIZED BY LARGE RIDGES WITH EMBEDDED CYCLONIC CENTERS. ONE OVER THE MID ATLC NEAR 35N40W AND ANOTHER NEAR 35N80W. A THIRD ONE IS JUST N OF PUERTO RICO NEAR 22N67W MOVING SLOWLY W. ON THE SURFACE TONIGHT A WEAK COLD FRONT HAS MOVED S OVER N CENTRAL FL AND THE N GULF AS WEAK LOW PRES MOVES NE OFF THE CAROLINA COAST. TRPCL WAVES WERE ALONG 93W..69W AND 50W..NONE OF WHICH WERE VERY ACTIVE. FOR DAY 1 LITTLE CHANGE TO THE UPPER FEATURES. THE UPPER LOW N OF PUERTO RICO MVOES TO NEAR 70W WHILE AN UPPER TROUGH CONTINUES ALONG 80W. ON THE SURFACE DAY 1 A WEAK FRONTAL TROUGH WILL CONTINUE E OF FL WITH WINDS TO 20 KT ON EITHER SIDE. THE ATLC RIDGE CENTER 1028 MB WILL BE NEAR 32N50W WITH IT'S AXIS WSW TO THE NRN BAHAMAS. MODERATE ELY TRADES S OF 23N E OF 65W AND OVER THE CARIB S OF 17N. GULF WINDS MOSTLY LIGHT. FOR DAY 2 THE UPPER RIDGE OVER THE MID ATLC STRENGTHENS WITH A CENTER NEAR 32N57W. THE TROUGH ALONG 80W BEGINS TO LIFT NE AND THE UPPER LOW ALONG 70W WEAKENS OVER THE SE BAHAMAS. ON THE SURFACE DAY 2 A WEAK FRONTAL TROUGH WILL CONTINUE JUST E OF FL WITH LIGHT WINDS. THE ATLC RIDGE CENTER WILL MOVE TO NEAR 33N59W AT 1028 MB WITH LITTLE CHANGE TO THE TRADES. GULF WINDS WILL REMAIN LIGHT. OUTLOOK PERIOD... A STRONG UPPER RIDGE WILL CONTINUE DAY 3 WITH A CENTER NEAR 33N60W. A WEAKNESS IN THE PRESSURE FIELD WILL CONTINUE OVER THE SE US DAY 3 BACK TO 90W. ON THE SURFACE THE FRONTAL TROUGH WILL DISSIPATE DAY 3 WHILE THE ATLC RIDGE DEVELOPS TWO CENTERS WITH A TROUGH ALONG 60W N OF 28N. THE GFS CONTINUES A MODERATE TRPCL WAVE SIGNATURE WWD TO NEAR 59W OTHERWISE NO CHANGE TO THE BASIC WIND PATTERN. LITTLE CHANGE TO THE UPPER PATTERN DAY 4 WITH THE ATLC RIDGE CENTER HOLDING NEAR 33N62W. A CLOSED UPPER CYCLONIC CENTER WILL REMAIN NEAR 31N40W. A WEAKNESS IN THE MID LEVEL PRESSURE FIELD REMAINS OVER THE DEEP SOUTH ALONG 87W. ON THE SURFACE LITTLE CHANGE TO THE ATLC RIDGE WITH A WEAK TROUGH ALONG 60W. THE MODERATE TRPL WAVE CONTINUES WWD TO NEAR 55W WITH 25 TO 30 KT ELY WINDS BETWEEN 17N AND 22N FROM 50W TO 55W. ON DAY 5 A BROAD UPPER RIDGE WILL DOMINATE THE REGION W OF 50W WWD TO THE SE US. A WEAKNESS WILL CONTINUE OVER THE N CENTRAL GULF ALONG 88W. ON THE SURFACE A 1028 MB RIDGE CENTER NEAR 33N67W WILL MAINTAIN MODERATE ELY TRADES WITH CARIB WINDS INCREASING SOME 20 TO 25 KT. GULF WINDS REMAIN LIGHT. THE GFS MODEL SHOWS THE MODERATE TRPL WAVE MOVING TO NEAR 62W WITH NO DEVELOPMENT. WARNINGS... ATLANTIC... NONE. CARIBBEAN... NONE. GULF OF MEXICO... NONE. FORECASTER RRG