000 ABPZ20 KNHC 190554 TWOEP TROPICAL WEATHER OUTLOOK NWS NATIONAL HURRICANE CENTER MIAMI FL 1100 PM PDT SAT JUN 18 2011 FOR THE EASTERN NORTH PACIFIC...EAST OF 140 DEGREES WEST LONGITUDE.. RECENT SATELLITE DATA INDICATE THE LARGE LOW PRESSURE SYSTEM CENTERED ABOUT 300 MILES SOUTH-SOUTHEAST OF ACAPULCO HAS CONTINUED TO BECOME BETTER DEFINED. ALTHOUGH THUNDERSTORM ACTIVITY HAS CHANGED LITTLE OVER THE PAST SEVERAL HOURS...ENVIRONMENTAL CONDITIONS ARE EXPECTED TO REMAIN SOMEWHAT FAVORABLE FOR A TROPICAL DEPRESSION TO FORM AS EARLY AS SUNDAY EVENING. THERE IS A HIGH CHANCE...80 PERCENT...OF THIS SYSTEM BECOMING A TROPICAL CYCLONE DURING THE NEXT 48 HOURS AS IT MOVES WESTWARD TO WEST-NORTHWESTWARD NEAR 10 MPH. INTERESTS ALONG THE SOUTHWESTERN COAST OF MEXICO SHOULD MONITOR THE PROGRESS OF THIS LARGE DISTURBANCE OVER THE NEXT FEW DAYS. ELSEWHERE...TROPICAL CYCLONE FORMATION IS NOT EXPECTED DURING THE NEXT 48 HOURS. $$ FORECASTER STEWART