000 WTPZ34 KNHC 232343 TCPEP4 BULLETIN Hurricane Willa Intermediate Advisory Number 15A NWS National Hurricane Center Miami FL EP242018 600 PM MDT Tue Oct 23 2018 ...EYE OF WILLA ABOUT TO MAKE LANDFALL ALONG THE WEST-CENTRAL COAST OF MEXICO... ...DO NOT VENTURE OUT INTO THE RELATIVE CALM OF THE EYE SINCE HAZARDOUS WINDS WILL SUDDENLY INCREASE AS THE EYE PASSES... SUMMARY OF 600 PM MDT...0000 UTC...INFORMATION ---------------------------------------------- LOCATION...22.6N 106.0W ABOUT 50 MI...80 KM SSE OF MAZATLAN MEXICO MAXIMUM SUSTAINED WINDS...120 MPH...195 KM/H PRESENT MOVEMENT...NNE OR 30 DEGREES AT 10 MPH...17 KM/H MINIMUM CENTRAL PRESSURE...965 MB...28.50 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: None. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Hurricane Warning is in effect for... * San Blas to Mazatlan, including Las Islas Marias A Tropical Storm Warning is in effect for... * Playa Perula to San Blas * North of Mazatlan to Bahia Tempehuaya A Hurricane Warning means that hurricane conditions are expected somewhere within the warning area. A Tropical Storm Warning means that tropical storm conditions are expected somewhere within the warning area. For storm information specific to your area, please monitor products issued by your national meteorological service. DISCUSSION AND OUTLOOK ---------------------- At 600 PM MDT (0000 UTC), the eye of Hurricane Willa was located near latitude 22.6 North, longitude 106.0 West. Willa is moving toward the north-northeast near 10 mph (17 km/h). A faster motion toward the northeast is expected tonight. On the forecast track, the eye of Willa will make landfall along the coast of west-central Mexico within the hurricane warning area within the next hour or so. Maximum sustained winds remain near 120 mph (195 km/h) with higher gusts. Willa is a category 3 hurricane on the Saffir-Simpson Hurricane Wind Scale. Little change in strength is expected before Willa crosses the coast of Mexico. Very rapid weakening is expected after landfall, and Willa is expected to dissipate over northern Mexico on Wednesday. Hurricane-force winds extend outward up to 35 miles (55 km) from the center and tropical-storm-force winds extend outward up to 115 miles (185 km). The estimated minimum central pressure is 965 mb (28.50 inches). HAZARDS AFFECTING LAND ---------------------- STORM SURGE: An extremely dangerous storm surge is occurring along portions of the coast of southwestern Mexico in southern Sinaloa and Nayarit, with the highest surge likely to occur near and to the south of where the center of Willa makes landfall. Near the coast, the surge will be accompanied by large and destructive waves. RAINFALL: Willa is expected to produce storm total rainfall accumulations of 6 to 12 inches, with local amounts to 18 inches, across portions of western Jalisco, western Nayarit, southern Sinaloa, and far southern Durango in Mexico. This rainfall will cause life-threatening flash flooding and landslides. Farther inland, Willa is expected to produce rainfall amounts of 1 to 3 inches across the rest of Durango and portions of Zacateca, southeast Chihuahua, and Coahuila, with local amounts to 5 inches possible. WIND: Hurricane conditions will gradually subside in Las Islas Marias. Hurricane conditions will continue to spread into the hurricane warning area along the coast of mainland Mexico this evening. Tropical storm conditions will continue along the coast of mainland Mexico within the warning area through tonight. 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. SURF: Large swells generated by Willa will continue to affect portions of the coast of southwestern and west-central mainland Mexico, and the coast of the southern Baja California peninsula during the next day or two. These swells are likely to cause life-threatening surf and rip current conditions. Please consult products from your local weather office. NEXT ADVISORY ------------- Next complete advisory at 900 PM MDT. $$ Forecaster Avila