000 WTPZ35 KNHC 270547 TCPEP5 BULLETIN Tropical Storm John Intermediate Advisory Number 17A NWS National Hurricane Center Miami FL EP102024 1200 AM CST Fri Sep 27 2024 ...JOHN GRADUALLY WEAKENING AND SLOWLY MOVING TOWARD THE COAST... ...CATASTROPHIC FLASH FLOODING AND MUDSLIDES CONTINUE OVER PORTIONS OF SOUTHERN AND SOUTHWESTERN MEXICO... SUMMARY OF 1200 AM CST...0600 UTC...INFORMATION ----------------------------------------------- LOCATION...17.5N 102.9W ABOUT 60 MI...95 KM SW OF LAZARO CARDENAS MEXICO ABOUT 140 MI...225 KM SE OF MANZANILLO MEXICO MAXIMUM SUSTAINED WINDS...65 MPH...100 KM/H PRESENT MOVEMENT...NW OR 315 DEGREES AT 4 MPH...6 KM/H MINIMUM CENTRAL PRESSURE...988 MB...29.18 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: None. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Tropical Storm Warning is in effect for... * Punta Maldonado to Manzanillo A Tropical Storm Warning means that tropical storm conditions are expected somewhere within the warning area, in this case within the next 12 hours. For storm information specific to your area, please monitor products issued by your national meteorological service. DISCUSSION AND OUTLOOK ---------------------- At 1200 AM CST (0600 UTC), the center of Tropical Storm John is a little south of the previously estimated position and was located near latitude 17.5 North, longitude 102.9 West. John is moving toward the northwest near 4 mph (6 km/h) and this motion is expected to continue through today. On the forecast track, the center of John is forecast move along the coast or just inland of southwestern Mexico later today or tonight. Maximum sustained winds have decreased to near 65 mph (100 km/h) with higher gusts. Gradual weakening is expected today, with a faster rate of weakening forecast by tonight while the center begins to interact with the higher terrain of the Sierra Madre Del Sur mountains. Tropical-storm-force winds extend outward up to 160 miles (260 km) from the center. The estimated minimum central pressure is 988 mb (29.18 inches). HAZARDS AFFECTING LAND ---------------------- RAINFALL: Through today, Tropical Storm John is expected to produce rainfall amounts of 10 to 20 inches across portions of the Mexican States of Guerrero and Michoacán. Additional rainfall of 2 to 4 inches with locally up to 6 inches is expected across the Mexican states of Colima and western Oaxaca. For a complete depiction of forecast rainfall associated with John, please see the National Weather Service Storm Total Rainfall Graphic, available at hurricanes.gov/graphics_ep5.shtml?rainqpf STORM SURGE: Storm surge is likely to produce coastal flooding near and to the east of where the center makes landfall. Near the coast, the surge will be accompanied by large waves. WIND: Tropical storm conditions are expected to continue across coastal portions of the Tropical Storm Warning area through today. SURF: Swells associated with John are forecast to continue to affect the coast of southern and southwestern Mexico through tonight into Saturday, with the potential for dangerous surf and rip currents. Please see local statements for more information. NEXT ADVISORY ------------- Next complete advisory at 300 AM CST. $$ Forecaster Roberts
Tropical Storm John Public Advisory
27
Sep