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Eastern North Pacific Tropical Weather Outlook
2018-09-19 15:47:49| National Hurricane Center (East Pacific)
751 ABPZ20 KNHC 191347 TWOEP Special Tropical Weather Outlook NWS National Hurricane Center Miami FL Issued by the NWS Weather Prediction Center College Park MD 650 AM PDT Wed Sep 19 2018 Updated first system to raise probabilities For the eastern North Pacific...east of 140 degrees west longitude: Updated: Satellite imagery and surface observations indicate that a low pressure area over the southern Gulf of California has become better defined this morning. This system could become a tropical depression later today before moving into northwestern mainland Mexico tonight. This disturbance is expected to produce total rain accumulations of 5 to 10 inches, with isolated maximum amounts of 15 inches across portions of Baja California Sur, Sinaloa, and Sonora through Thursday. This rainfall may cause life-threatening flash floods and mudslides. Moisture from this disturbance will also lead to areas of heavy rainfall and a risk of flash flooding in the southwestern United States beginning today. * Formation chance through 48 hours...medium...50 percent. * Formation chance through 5 days...medium...50 percent. Another elongated area of low pressure is located about 900 miles southwest of the southern tip of the Baja California peninsula. Environmental conditions are expected to be conducive for some gradual development of this system during the next few days while it moves slowly west-northwestward or northwestward. * Formation chance through 48 hours...low...20 percent. * Formation chance through 5 days...medium...40 percent. $$ Forecaster Roth/Blake
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