ZCZC MIATCPEP2 ALL TTAA00 KNHC DDHHMM BULLETIN TROPICAL STORM MARTY ADVISORY NUMBER 13 NWS NATIONAL HURRICANE CENTER MIAMI FL EP172015 400 PM CDT TUE SEP 29 2015 ...MARTY DRIFTING ERRATICALLY OFFSHORE OF SOUTH-CENTRAL MEXICO... SUMMARY OF 400 PM CDT...2100 UTC...INFORMATION ---------------------------------------------- LOCATION...16.3N 101.2W ABOUT 100 MI...160 KM SSE OF ZIHUATANEJO MEXICO ABOUT 95 MI...155 KM WSW OF ACAPULCO MEXICO MAXIMUM SUSTAINED WINDS...50 MPH...85 KM/H PRESENT MOVEMENT...N OR 0 DEGREES AT 2 MPH...4 KM/H MINIMUM CENTRAL PRESSURE...999 MB...29.50 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: None. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Tropical Storm Warning is in effect for... * Acapulco to Lazaro Cardenas A Tropical Storm Watch is in effect for... * West of Lazaro Cardenas to Punta San Telmo A Tropical Storm Warning means that tropical storm conditions are expected somewhere within the warning area, in this case within 12-24 hours. A Tropical Storm Watch means that tropical storm conditions are possible within the watch area, in this case within the next 24 hours. For storm information specific to your area, please monitor products issued by your national meteorological service. DISCUSSION AND 48-HOUR OUTLOOK ------------------------------ At 400 PM CDT (2100 UTC), the center of Tropical Storm Marty was located near latitude 16.3 North, longitude 101.2 West. Marty is currently drifting toward the north. A turn toward the west-northwest is expected tonight, and this general motion is likely to continue on Wednesday and Wednesday night with some increase in forward speed. On the forecast track, the center of Marty is forecast to be near but just offshore of the southwestern coast of Mexico this afternoon through Wednesday. Maximum sustained winds have decreased to near 50 mph (85 km/h) with higher gusts. Some additional weakening is forecast during the next 48 hours, and Marty could weaken to a depression Wednesday or Wednesday night. Tropical-storm-force winds extend outward up to 80 miles (130 km) from the center. The estimated minimum central pressure is 999 mb (29.50 inches). HAZARDS AFFECTING LAND ---------------------- WIND: Tropical storm conditions are expected within the tropical storm warning area this afternoon and tonight. Tropical storm conditions are possible within the watch area by tonight. RAINFALL: Marty is expected to produce rainfall amounts of 5 to 10 inches over the Mexican state of Guerrero through Thursday. Isolated amounts of 15 inches are possible in Guerrero from the Sierra Madre del Sur mountains toward the coast. These rains are expected to produce life-threatening flash floods and mud slides, especially in areas of mountainous terrain. STORM SURGE: A storm surge is expected to produce coastal flooding in areas of onshore flow. The surge will be accompanied by large and destructive waves. SURF: Swells generated by Marty are affecting portions of the coast of southern Mexico. These swells are likely to cause life- threatening surf and rip current conditions. Please consult products from your local weather office. NEXT ADVISORY ------------- Next intermediate advisory at 700 PM CDT. Next complete advisory at 1000 PM CDT. $$ Forecaster Beven NNNN