000 ABPZ20 KNHC 261739 TWOEP TROPICAL WEATHER OUTLOOK NWS NATIONAL HURRICANE CENTER MIAMI FL 1100 AM PDT SAT SEP 26 2015 For the eastern North Pacific...east of 140 degrees west longitude: Satellite imagery indicates that shower and thunderstorm activity associated with an area of low pressure located about 350 miles southwest of Acapulco, Mexico is becoming better organized, and that the low's circulation is becoming better defined. If these trends continue, advisories would be initiated on a tropical depression later today or tonight while the low moves northwestward or north-northwestward at about 5 to 10 mph. Interests along the southern coast of Mexico should continue to monitor the progress of this system. * Formation chance through 48 hours...high...near 100 percent * Formation chance through 5 days...high...near 100 percent The concentrated area of thunderstorms associated with a small low pressure system offshore of the coasts of Guatemala and El Salvador has diminished this morning, and the area of low pressure appears to be dissipating. Upper-level winds are not conducive for development, and tropical cyclone formation from this system is unlikely. Moisture related to this disturbance could still produce locally heavy rains across portions of El Salvador and southern Guatemala during the next day or so, with the rains possibly causing life-threatening flash floods and mud slides. * Formation chance through 48 hours...low...10 percent * Formation chance through 5 days...low...10 percent An area of low pressure could form by the middle of this week about 1000 miles southwest of the southern tip of the Baja California peninsula. Any development of this system later should be slow to occur while the moves northward or northeastward. * Formation chance through 48 hours...low...near 0 percent * Formation chance through 5 days...low...20 percent $$ Forecaster Kimberlain