000 ABPZ20 KNHC 032349 TWOEP TROPICAL WEATHER OUTLOOK NWS NATIONAL HURRICANE CENTER MIAMI FL 500 PM PDT SAT SEP 3 2016 For the eastern North Pacific...east of 140 degrees west longitude: Showers and thunderstorms associated with an elongated area of low pressure continue to extend for several hundred miles near and offshore the southern coast of Mexico. Satellite images indicate that a more well-defined center of circulation may be developing about 300 miles south-southwest of Manzanillo, Mexico, and the thunderstorm activity in that area is showing some signs of organization. Upper-level winds are becoming more conducive for development, and a tropical depression is expected to form on Sunday or Monday while the disturbance moves slowly northward and then northwestward parallel to the southwestern coast of Mexico. Regardless of development, the system is expected to bring gusty winds and very heavy rains to southwestern Mexico. Total rainfall amounts of 5 to 10 inches with isolated totals up to 15 inches are expected through the weekend into early next week over the southern Mexico states of Oaxaca, Guerrero, Michoacan, Colima, Jalisco, and Nayarit. These rains could produce life-threatening flash floods and mudslides, especially in areas of mountainous terrain. Interests in these areas and Baja California Sur should monitor the progress of this disturbance. * Formation chance through 48 hours...high...80 percent * Formation chance through 5 days...high...90 percent An area of low pressure could form in a few days about 1500 miles southwest of the southern tip of the Baja California peninsula. Any development of this system should be slow to occur while the system moves little. * Formation chance through 48 hours...low...near 0 percent * Formation chance through 5 days...low...20 percent Another area of low pressure is likely to form by the middle of next week well south of Mexico. Some gradual development of this system is possible late next week while it moves generally westward. * Formation chance through 48 hours...low...near 0 percent * Formation chance through 5 days...low...20 percent $$ Forecaster Berg