000 ABPZ20 KNHC 212331 TWOEP TROPICAL WEATHER OUTLOOK NWS NATIONAL HURRICANE CENTER MIAMI FL 500 PM PDT SUN JUL 21 2013 FOR THE EASTERN NORTH PACIFIC...EAST OF 140 DEGREES WEST LONGITUDE.. SHOWERS AND THUNDERSTORMS ASSOCIATED WITH A BROAD LOW PRESSURE AREA LOCATED ABOUT 600 MILES SOUTHWEST OF ACAPULCO MEXICO REMAIN DISORGANIZED. HOWEVER...THE CENTER OF CIRCULATION HAS BECOME BETTER DEFINED DURING THE DAY...AND CONTINUED SLOW DEVELOPMENT OF THE LOW IS POSSIBLE AS IT MOVES WEST-NORTHWESTWARD AT 10 TO 15 MPH DURING THE NEXT COUPLE OF DAYS. THIS SYSTEM HAS A LOW CHANCE...20 PERCENT...OF BECOMING A TROPICAL CYCLONE DURING THE NEXT 48 HOURS. $$ FORECASTER BERG