000 ABPZ20 KNHC 112340 TWOEP TROPICAL WEATHER OUTLOOK NWS NATIONAL HURRICANE CENTER MIAMI FL 500 PM PDT TUE SEP 11 2012 FOR THE EASTERN NORTH PACIFIC...EAST OF 140 DEGREES WEST LONGITUDE.. SHOWERS AND THUNDERSTORMS ASSOCIATED WITH A LOW PRESSURE SYSTEM...LOCATED ABOUT 250 MILES SOUTH OF MANZANILLO MEXICO...HAVE BECOME BETTER ORGANIZED THIS AFTERNOON. ENVIRONMENTAL CONDITIONS ARE CONDUCIVE FOR ADDITIONAL DEVELOPMENT...AND A TROPICAL DEPRESSION COULD FORM TONIGHT OR WEDNESDAY. THIS SYSTEM HAS A HIGH CHANCE...90 PERCENT...OF BECOMING A TROPICAL CYCLONE DURING THE NEXT 48 HOURS AS IT MOVES WEST-NORTHWESTWARD AT 10 MPH. ELSEWHERE...TROPICAL CYCLONE FORMATION IS NOT EXPECTED DURING THE NEXT 48 HOURS. $$ FORECASTER ROBERTS