ZCZC MIATCPEP4 ALL TTAA00 KNHC DDHHMM BULLETIN Tropical Storm Lidia Advisory Number 11 NWS National Hurricane Center Miami FL EP142017 300 AM MDT Fri Sep 01 2017 ...LIDIA'S CENTER JUST OFFSHORE THE SOUTHWESTERN COAST OF BAJA CALIFORNIA SUR... ...HEAVY RAINS CONTINUE OVER SOUTHERN BAJA CALIFORNIA SUR... SUMMARY OF 300 AM MDT...0900 UTC...INFORMATION ---------------------------------------------- LOCATION...23.8N 111.0W ABOUT 50 MI...85 KM WSW OF LA PAZ MEXICO ABOUT 105 MI...170 KM SE OF CABO SAN LAZARO MEXICO MAXIMUM SUSTAINED WINDS...65 MPH...100 KM/H PRESENT MOVEMENT...NW OR 325 DEGREES AT 8 MPH...13 KM/H MINIMUM CENTRAL PRESSURE...987 MB...29.15 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: The government of Mexico has extended the Tropical Storm Warning on the west coast of the Baja California peninsula northward to San Jose de Las Palomas, on the east coast northward to Isla San Luis, and along the coast of mainland Mexico northward to Puerto Libertad. The government of Mexico has discontinued the Hurricane Watch for Baja California Sur, as well as the Tropical Storm Warning south of Altata on the coast of mainland Mexico. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Tropical Storm Warning is in effect for... * Baja California peninsula from San Jose de Las Palomas to Isla San Luis * Mainland Mexico from Altata to Puerto Libertad A Tropical Storm Warning means that tropical storm conditions are expected somewhere within the warning area within 36 hours. Interests elsewhere in western Mexico and the Baja California peninsula should monitor the progress of Lidia. For storm information specific to your area, please monitor products issued by your national meteorological service. DISCUSSION AND 48-HOUR OUTLOOK ------------------------------ At 300 AM MDT (0900 UTC), the center of Tropical Storm Lidia was located near latitude 23.8 North, longitude 111.0 West. Lidia is moving toward the northwest near 8 mph (13 km/h), and this direction with an increase in forward speed is expected through Saturday night. On the forecast track, the center of Lidia will move near or along the west coast of the Baja California peninsula through Saturday and then move west of the peninsula over the Pacific waters Saturday night. Maximum sustained winds are near 65 mph (100 km/h) with higher gusts. Weakening is forecast during the next couple of days while Lidia interacts with the mountainous terrain of the Baja California peninsula. Lidia is expected to become a remnant low by Saturday night. Tropical-storm-force winds extend outward up to 195 miles (315 km), especially to the northeast and southeast of the center. The estimated minimum central pressure is 987 mb (29.15 inches). HAZARDS AFFECTING LAND ---------------------- RAINFALL: Lidia is expected to produce total rain accumulations of 6 to 12 inches across the Mexican states of Baja California Sur into Baja California, Sinaloa, and the coastal section of Sonora, with isolated maximum amounts of 20 inches. These rains may cause life-threatening flash floods and mudslides. Some of the tropical moisture from Lidia may reach parts of the Desert Southwest this holiday weekend, including southern California, southern Nevada, and southwestern Arizona. WIND: Tropical storm conditions are occurring over the southern portion of Baja California Sur at this time. These conditions should spread northward across the warning areas of the Baja California peninsula and mainland Mexico through Saturday. Wind speeds atop and on the windward sides of hills and mountains are often up to 30 percent stronger than the near-surface winds indicated in this advisory, and in some elevated locations could be even greater. STORM SURGE: A dangerous storm surge is expected to produce coastal flooding in areas of onshore winds on the southern portion of Baja California Sur. Near the coast, the surge will be accompanied by large and destructive waves. SURF: Swells generated by Lidia are affecting portions of the coast of southwestern and western Mexico and southern portions of Baja California Sur, and could cause life-threatening surf and rip current conditions. Please consult products from your local weather office. NEXT ADVISORY ------------- Next intermediate advisory at 600 AM MDT. Next complete advisory at 900 AM MDT. $$ Forecaster Berg NNNN