000 ABNT20 KNHC 271136 TWOAT TROPICAL WEATHER OUTLOOK NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL 800 AM EDT SAT JUN 27 2009 FOR THE NORTH ATLANTIC...CARIBBEAN SEA AND THE GULF OF MEXICO... A TROPICAL WAVE OVER THE FAR NORTHWESTERN CARIBBEAN SEA IS PRODUCING DISORGANIZED SHOWERS AND THUNDERSTORMS FROM CUBA AND THE CAYMAN ISLANDS WESTWARD TO THE YUCATAN PENINSULA...AND SATELLITE IMAGES INDICATE THAT THE LOW-LEVEL CIRCULATION IS NOT WELL-DEFINED. SIGNIFICANT DEVELOPMENT OF THIS SYSTEM IS NOT EXPECTED TODAY ALTHOUGH ENVIRONMENTAL CONDITIONS SHOULD BECOME MORE FAVORABLE FOR SOME DEVELOPMENT ONCE THE SYSTEM MOVES INTO THE SOUTHERN GULF OF MEXICO TONIGHT. THERE IS A MEDIUM CHANCE...30 TO 50 PERCENT... OF THIS SYSTEM BECOMING A TROPICAL CYCLONE DURING THE NEXT 48 HOURS. LOCALLY HEAVY RAINS WILL AFFECT PORTIONS OF WESTERN AND CENTRAL CUBA...THE CAYMAN ISLANDS...AND THE YUCATAN PENINSULA TODAY AND COULD SPREAD NORTHWARD TOWARDS SOUTH FLORIDA OVER THE NEXT DAY OR SO. ELSEWHERE...TROPICAL CYCLONE FORMATION IS NOT EXPECTED DURING THE NEXT 48 HOURS. $$ FORECASTER BERG