000 ABPZ20 KNHC 180542 TWOEP TROPICAL WEATHER OUTLOOK NWS NATIONAL HURRICANE CENTER MIAMI FL 1000 PM PST THU NOV 17 2011 FOR THE EASTERN NORTH PACIFIC...EAST OF 140 DEGREES WEST LONGITUDE.. SHOWERS AND THUNDERSTORMS HAVE BECOME MORE CONCENTRATED NEAR AN AREA OF LOW PRESSURE LOCATED ABOUT 450 MILES SOUTH-SOUTHWEST OF THE BORDER OF GUATEMALA AND MEXICO. ENVIRONMENTAL CONDITIONS ARE GENERALLY CONDUCIVE FOR DEVELOPMENT...AND A TROPICAL DEPRESSION COULD FORM OVER THE WEEKEND AS IT MOVES WESTWARD AT 10 TO 15 MPH. THIS SYSTEM HAS A MEDIUM CHANCE...40 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