Public Tropical Cyclone Advisory
870 WTPZ35 KNHC 101153 TCPEP5 BULLETIN Hurricane Simon Intermediate Advisory Number 12A NWS National Hurricane Center Miami FL EP202026 600 AM CST Sat Oct 10 2026 ...SIMON CONTINUES TO RAPIDLY INTENSIFY WITH 150-MPH WINDS... ...PREPARATIONS TO PROTECT LIFE AND PROPERTY SHOULD BE RUSHED TO COMPLETION THIS MORNING IN THE HURRICANE WARNING AREA... SUMMARY OF 600 AM CST...1200 UTC...INFORMATION ---------------------------------------------- LOCATION...17.3N 104.8W ABOUT 120 MI...195 KM SSW OF MANZANILLO MEXICO ABOUT 220 MI...355 KM SSE OF CABO CORRIENTES MEXICO MAXIMUM SUSTAINED WINDS...150 MPH...240 KM/H PRESENT MOVEMENT...N OR 350 DEGREES AT 5 MPH...7 KM/H MINIMUM CENTRAL PRESSURE...938 MB...27.70 INCHES WATCHES AND WARNINGS -------------------- None. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Hurricane Warning is in effect for... * Punta San Telmo to El Roblito * Las Islas Marias A Tropical Storm Watch is in effect for... * East of Punta San Telmo to Lazaro Cardenas A Hurricane Warning means that hurricane conditions are expected somewhere within the warning area. A warning is typically issued 36 hours before the anticipated first occurrence of tropical-storm-force winds, conditions that make outside preparations difficult or dangerous. Preparations to protect life and property should be rushed to completion today. A Tropical Storm Watch means that tropical storm conditions are possible within the watch area, in this case starting this afternoon. Additional watches or warnings could be required for portions of the coast of southwestern and west-central Mexico later today. For storm information specific to your area, please monitor products issued by your national meteorological service. DISCUSSION AND OUTLOOK ---------------------- At 600 AM CST (1200 UTC), the center of Hurricane Simon was located near latitude 17.3 North, longitude 104.8 West. Simon is moving toward the north near 5 mph (7 km/h), and this general motion is forecast to continue through the weekend. On the forecast track, Simon is expected to be near or just inland of the west-central coast of Mexico on early Sunday. Maximum sustained winds have increased to near 150 mph (240 km/h) with higher gusts. Simon is a category 4 hurricane on the Saffir-Simpson Hurricane Wind Scale. Additional strengthening is forecast today. Simon is forecast to approach the coast of west-central Mexico as a major hurricane this evening or early Sunday. An Air Force Reconnaissance aircraft is scheduled to investigate the hurricane later today. Hurricane-force winds extend outward up to 15 miles (30 km) from the center and tropical-storm-force winds extend outward up to 70 miles (110 km). The estimated minimum central pressure is 938 mb (27.70 inches). HAZARDS AFFECTING LAND ---------------------- Key messages for Simon can be found in the Tropical Cyclone Discussion under AWIPS header MIATCDEP5 and WMO header WTPZ45 KNHC. WIND: Hurricane conditions are expected in the southern part of the Hurricane Warning area beginning early Sunday, with tropical storm conditions expected as soon as this afternoon, with these winds spreading northward thereafter. Tropical storm conditions are possible within the Tropical Storm Watch area beginning this afternoon. RAINFALL: Simon is expected to produce rainfall totals of 10 to 20 inches over portions of southwestern Mexico, with isolated maximum totals of 30 inches possible across portions of Michoacan, Colima, Jalisco and Nayarit through Sunday. This rainfall will produce life-threatening flooding and mudslides, especially in areas of steep terrain. For a complete depiction of forecast rainfall associated with Simon, please see the National Weather Service Storm Total Rainfall Graphic available at hurricanes.gov/graphics_ep5.shtml?rainqpf. STORM SURGE: A dangerous storm surge is expected along the immediate coast near and to the east of where the center makes landfall. Near the coast, the surge will be accompanied by large and destructive waves. SURF: Swells generated by Simon will affect portions of the coast of southwestern and west-central Mexico during the next few days. 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 AM CST.