000 ABPZ20 KNHC 200539 TWOEP TROPICAL WEATHER OUTLOOK NWS NATIONAL HURRICANE CENTER MIAMI FL 1100 PM PDT SAT SEP 19 2015 For the eastern North Pacific...east of 140 degrees west longitude: Shower and thunderstorm activity has changed little in association with an elongated low pressure system located about 250 miles southwest of the southern tip of the Baja California peninsula. This system still has the potential to become a tropical depression on Sunday while it moves north-northwestward or northward at 10 to 15 mph, and interests in the Baja California peninsula should monitor its progress. By late Sunday, however, the low is expected to encounter strong upper-level winds and cooler waters, which should prevent tropical cyclone formation. Regardless of development, moisture associated with this disturbance is expected to produce heavy rains across portions of the Baja California peninsula and northwestern Mexico on Sunday, and over portions of southern California and Arizona on Monday and Tuesday. These rains could produce life-threatening flash floods and mud slides, especially in mountainous areas. * Formation chance through 48 hours...high...70 percent * Formation chance through 5 days...high...70 percent A small area of disturbed weather located about 1300 miles east- southeast of the Big Island of Hawaii is not showing any signs of development at this time. This system has moved westward into the central Pacific, and future information on this disturbance can be found in products issued by the Central Pacific Hurricane Center in Honolulu, Hawaii. * Formation chance through 48 hours...low...near 0 percent * Formation chance through 5 days...low...30 percent $$ Forecaster Stewart