000 ABPZ20 KNHC 282333 TWOEP TROPICAL WEATHER OUTLOOK NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL 500 PM PDT FRI AUG 28 2009 FOR THE EASTERN NORTH PACIFIC...EAST OF 140 DEGREES WEST LONGITUDE.. SHOWERS AND THUNDERSTORMS ASSOCIATED WITH A LOW PRESSURE AREA LOCATED ABOUT 210 MILES SOUTH-SOUTHWEST OF ACAPULCO MEXICO HAVE BECOME SIGNIFICANTLY BETTER ORGANIZED DURING THE PAST SEVERAL HOURS AND A TROPICAL DEPRESSION APPEARS TO BE FORMING. IF THIS TREND CONTINUES...ADVISORIES WOULD BE INITIATED TONIGHT OR TOMORROW MORNING. THE LOW IS MOVING WEST-NORTHWESTWARD NEAR 10 MPH AND THERE IS A HIGH CHANCE...GREATER THAN 50 PERCENT...OF THIS SYSTEM BECOMING A TROPICAL CYCLONE DURING THE NEXT 48 HOURS. SHOWER AND THUNDERSTORMS ASSOCIATED WITH A BROAD AREA OF LOW PRESSURE LOCATED ABOUT 1030 MILES SOUTHWEST OF THE SOUTHERN TIP OF BAJA CALIFORNIA HAVE CHANGED LITTLE THIS AFTERNOON. UPPER-LEVEL WINDS APPEAR FAVORABLE FOR ADDITIONAL DEVELOPMENT OF THIS SYSTEM DURING THE NEXT COUPLE OF DAYS AS IT MOVES WEST-NORTHWESTWARD AT 10 TO 15 MPH. THERE IS A HIGH CHANCE...GREATER THAN 50 PERCENT...OF THIS SYSTEM BECOMING A TROPICAL CYCLONE DURING THE NEXT 48 HOURS. ELSEWHERE...TROPICAL CYCLONE FORMATION IS NOT EXPECTED DURING THE NEXT 48 HOURS. $$ FORECASTER ROBERTS/BEVEN