000 ABNT20 KNHC 052332 TWOAT TROPICAL WEATHER OUTLOOK NWS NATIONAL HURRICANE CENTER MIAMI FL 800 PM EDT SUN JUN 5 2011 FOR THE NORTH ATLANTIC...CARIBBEAN SEA AND THE GULF OF MEXICO... SHOWER AND THUNDERSTORM ACTIVITY HAS CHANGED LITTLE OVER THE PAST FEW HOURS IN ASSOCIATION WITH A BROAD LOW PRESSURE SYSTEM LOCATED ABOUT 175 MILES WEST-SOUTHWEST OF JAMAICA. WHILE THE SHOWER AND THUNDERSTORM ACTIVITY REMAINS CONCENTRATED MAINLY TO THE EAST OF THE AREA OF LOWEST SURFACE PRESSURES...SOME GRADUAL DEVELOPMENT OF THIS LARGE DISTURBANCE IS POSSIBLE DURING THE NEXT DAY OR SO BEFORE UPPER-LEVEL WINDS BECOME LESS FAVORABLE. THERE IS A MEDIUM CHANCE ...40 PERCENT...OF THIS SYSTEM BECOMING A TROPICAL CYCLONE DURING THE NEXT 48 HOURS. AN AIR FORCE RESERVE HURRICANE HUNTER AIRCRAFT IS SCHEDULED TO INVESTIGATE THE SYSTEM MONDAY AFTERNOON...IF NECESSARY. REGARDLESS OF DEVELOPMENT...HEAVY RAINS COULD CAUSE FLASH FLOODS AND MUD SLIDES OVER PORTIONS OF HAITI AND JAMAICA AS THE SYSTEM MOVES SLOWLY TOWARD THE NORTHWEST OR NORTH OVER THE NEXT COUPLE OF DAYS. ELSEWHERE...TROPICAL CYCLONE FORMATION IS NOT EXPECTED DURING THE NEXT 48 HOURS. $$ FORECASTER BRENNAN