000 ABPZ20 KNHC 182335 TWOEP TROPICAL WEATHER OUTLOOK NWS NATIONAL HURRICANE CENTER MIAMI FL 500 PM PDT SAT JUN 18 2011 FOR THE EASTERN NORTH PACIFIC...EAST OF 140 DEGREES WEST LONGITUDE.. SATELLITE DATA FROM EARLIER TODAY INDICATE THAT THE CENTER OF CIRCULATION OF A LOW PRESSURE AREA CENTERED ABOUT 325 MILES SOUTH-SOUTHEAST OF ACAPULCO MEXICO IS BECOMING BETTER DEFINED. SHOWER AND THUNDERSTORM ACTIVITY IS A LITTLE BIT MORE CONCENTRATED NEAR THE CENTER...AND ADDITIONAL ORGANIZATION COULD RESULT IN THE FORMATION OF A TROPICAL DEPRESSION TONIGHT OR ON SUNDAY. THERE IS A HIGH CHANCE...70 PERCENT...OF THIS SYSTEM BECOMING A TROPICAL CYCLONE DURING THE NEXT 48 HOURS AS IT MOVES WEST-NORTHWESTWARD NEAR 10 MPH. INTERESTS ALONG THE SOUTHWESTERN COAST OF MEXICO SHOULD MONITOR THE PROGRESS OF THIS LOW OVER THE NEXT FEW DAYS. ELSEWHERE...TROPICAL CYCLONE FORMATION IS NOT EXPECTED DURING THE NEXT 48 HOURS. $$ FORECASTER BERG