000 WTPZ31 KNHC 281737 TCPEP1 BULLETIN Tropical Storm Agatha Intermediate Advisory Number 3A NWS National Hurricane Center Miami FL EP012022 100 PM CDT Sat May 28 2022 ...AGATHA GRADUALLY STRENGTHENING OFF SOUTHERN MEXICO... ...EXPECTED TO BECOME A HURRICANE AS IT APPROACHES THE COAST... SUMMARY OF 100 PM CDT...1800 UTC...INFORMATION ---------------------------------------------- LOCATION...13.5N 98.0W ABOUT 180 MI...295 KM SSW OF PUERTO ANGEL MEXICO MAXIMUM SUSTAINED WINDS...50 MPH...85 KM/H PRESENT MOVEMENT...NNW OR 345 DEGREES AT 5 MPH...7 KM/H MINIMUM CENTRAL PRESSURE...1000 MB...29.53 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: None. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Hurricane Watch is in effect for... * The southern coast of Mexico from Salina Cruz to Punta Maldonado A Hurricane Watch means that hurricane conditions are possible within the watch area. A watch is typically issued 48 hours before the anticipated first occurrence of tropical-storm-force winds, conditions that make outside preparations difficult or dangerous. Interests elsewhere in southern Mexico should closely monitor the progress of Agatha. Additional watches and warnings will likely be required for portions of this area later today. For storm information specific to your area, please monitor products issued by your national meteorological service. DISCUSSION AND OUTLOOK ---------------------- At 100 PM CDT (1800 UTC), the center of Tropical Storm Agatha was located near latitude 13.5 North, longitude 98.0 West. Agatha is moving toward the north-northwest near 5 mph (7 km/h). A turn toward the northeast is forecast to occur late tonight or Sunday. On the forecast track, the center of Agatha will approach the southern coast of Mexico on Sunday and make landfall there on Monday. Satellite data indicate that the maximum sustained winds have increased to near 50 mph (85 km/h) with higher gusts. Additional steady to rapid strengthening is forecast, and Agatha is expected to become a hurricane on Sunday. Tropical-storm-force winds extend outward up to 70 miles (110 km) from the center. The estimated minimum central pressure is 1000 mb (29.53 inches). HAZARDS AFFECTING LAND ---------------------- WIND: Hurricane conditions are possible within the hurricane watch area on Monday, with tropical storm conditions possible late Sunday or early Monday. STORM SURGE: Storm surge could produce coastal flooding near and to the east of where the center passes the coast in areas of onshore winds. The surge may be accompanied by large and destructive waves. RAINFALL: Agatha will produce heavy rains over portions of southern Mexico by Sunday into Tuesday night. The following rainfall amounts are currently expected: Mexican state of Oaxaca: 10 to 16 inches, with isolated maximum amounts of 20 inches possible. Life-threatening flash flooding and mudslides may occur. Mexican state of Chiapas: 5 to 10 inches, with isolated maximum amounts of 15 inches possible. Life-threatening flash flooding and mudslides may occur. Eastern portions of the Mexican state of Guerrero: 2 to 6 inches, with isolated maximum amounts of 10 inches possible. Life-threatening flash flooding and mudslides may occur. Mexican states of Vera Cruz and Tabasco: 2 to 4 inches, with isolated maximum amounts of 6 inches possible. SURF: Swells generated by Agatha are expected to begin affecting the coast of southern Mexico early Sunday. 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 400 PM CDT. $$ Forecaster Cangialosi