000 AGXX40 KNHC 041653 MIMATS MARINE WEATHER DISCUSSION NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL 100 PM EDT SUN SEP 4 2005 MARINE WEATHER DISCUSSION FOR GULF OF MEXICO...CARIBBEAN SEA AND SOUTHWEST NORTH ATLC S OF 31N W OF 55W. UPPER LEVELS... RIDGE IS WEST OF 90W AND ANOTHER RIDGE IS EAST OF 70W SOUTH OF 20N AND E OF 62W N OF 20N. BETWEEN THE TWO RIDGES IS A BROAD TROUGH. BY WEDNESDAY A BROAD RIDGE WILL BE OVER THE ATLANTIC AREA WITH A BROAD TROUGH OVER THE GULF OF MEXICO. THIS PATTERN WILL CONTINUE THROUGH FRIDAY. SURFACE... A BROAD TROUGH WILL BE OVER THE AREA NEAR 25N WITH HIGH PRESSURE NORTH OF THE AREA. THE PRESSURE GRADIENT BETWEEN THE TWO SYSTEM WILL BE MAINLY NORTH OF 28N WITH THE STRONGER NORTHEAST WINDS CONFINED TO THIS AREA. THIS PATTERN SHOULD HOLD THROUGH WEDNESDAY WHEN THE GRADIENT WILL WEAKEN AND PULL FURTHER NORTH. OF COURSE ALL THIS IS WITHOUT REGARD FOR ANY TROPICAL DEVELOPMENT. THE NHC IS CONCERNED WITH CONVECTIVE AREAS IN THE BROAD SURFACE LOW OVER THE WESTERN ATLANTIC AND THIS SHOULD BE WATCHED CLOSELY. THE USUAL WINDS WILL PREVAIL IN THE CARIBBEAN WITH 20 TO 25 KT WINDS OVER THE SOUTH CENTRAL PART. ATLANTIC... NONE. CARIBBEAN... NONE. GULF OF MEXICO... NONE. FORECASTER LL