000 ABPZ20 KNHC 182330 TWOEP TROPICAL WEATHER OUTLOOK NWS NATIONAL HURRICANE CENTER MIAMI FL 500 PM PDT FRI MAY 18 2012 FOR THE EASTERN NORTH PACIFIC...EAST OF 140 DEGREES WEST LONGITUDE.. THE NATIONAL HURRICANE CENTER IS ISSUING ADVISORIES ON TROPICAL DEPRESSION ALETTA...LOCATED ABOUT 635 MILES SOUTH-SOUTHWEST OF THE SOUTHERN TIP OF BAJA CALIFORNIA. SHOWER AND THUNDERSTORM ACTIVITY REMAINS DISORGANIZED IN ASSOCIATION WITH AN AREA OF LOW PRESSURE LOCATED SEVERAL HUNDRED MILES SOUTH OF ACAPULCO MEXICO. DEVELOPMENT OF THIS SYSTEM IS EXPECTED TO BE SLOW AS IT DRIFTS ERRATICALLY...AND THIS SYSTEM HAS A LOW CHANCE...20 PERCENT...OF BECOMING A TROPICAL CYCLONE DURING THE NEXT 48 HOURS. ELSEWHERE...TROPICAL CYCLONE FORMATION IS NOT EXPECTED DURING THE NEXT 48 HOURS. $$ FORECASTER BLAKE