000 WTNT31 KNHC 201148 TCPAT1 BULLETIN Tropical Storm Alberto Intermediate Advisory Number 11A NWS National Hurricane Center Miami FL AL012024 700 AM CDT Thu Jun 20 2024 ...ALBERTO MOVING INLAND OVER MEXICO... ...HEAVY RAINS AND FLASH FLOODING CONTINUE IN NORTHEASTERN MEXICO... SUMMARY OF 700 AM CDT...1200 UTC...INFORMATION ---------------------------------------------- LOCATION...22.3N 98.3W ABOUT 25 MI...45 KM W OF TAMPICO MEXICO ABOUT 255 MI...410 KM S OF BROWNSVILLE TEXAS MAXIMUM SUSTAINED WINDS...45 MPH...75 KM/H PRESENT MOVEMENT...W OR 275 DEGREES AT 13 MPH...20 KM/H MINIMUM CENTRAL PRESSURE...997 MB...29.44 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: None. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Tropical Storm Warning is in effect for... * the northeastern coast of Mexico south of the mouth of the Rio Grande to Tecolutla. A Tropical Storm Warning means that tropical storm conditions are expected somewhere within the warning area, in this case through this morning. For storm information specific to your area, please monitor products issued by your national meteorological service. DISCUSSION AND OUTLOOK ---------------------- At 700 AM CDT (1200 UTC), the center of Tropical Storm Alberto was located near latitude 22.3 North, longitude 98.3 West. Alberto is moving toward the west near 13 mph (20 km/h). This motion is expected to continue through today, as Alberto moves further inland over Mexico. Maximum sustained winds are near 45 mph (75 km/h) with higher gusts. Weakening is anticipated as Alberto continues to move inland, and the storm is likely to dissipate over Mexico later today or tonight. Tropical-storm-force winds extend outward up to 250 miles (400 km) from the center. The estimated minimum central pressure is 997 mb (29.44 inches). HAZARDS AFFECTING LAND ---------------------- Key messages for Alberto can be found in the Tropical Cyclone Discussion under AWIPS header MIATCDAT1 and WMO header WTNT41 KNHC. RAINFALL: Rainfall associated with Tropical Storm Alberto is expected to begin to diminish across southern Texas during the day, with additional rainfall totals of 1 inch or less expected. Heavy rainfall will continue to impact northeast Mexico through this morning, with rainfall totals of 5 to 10 inches expected. Maximum rainfall totals around 20 inches are possible across the higher terrain of the Mexican states of Coahuila, Nuevo Leon, and Tamaulipas. This rainfall will likely produce considerable flash and urban flooding along with new and renewed river flooding. Mudslides are also possible in areas of higher terrain across northeast Mexico. For a complete depiction of forecast rainfall and flash flooding associated with Alberto, please see the National Weather Service Storm Total Rainfall Graphic, available at hurricanes.gov/graphics_at1.shtml?rainqpf and the Flash Flood Risk graphic at hurricanes.gov/graphics_at1.shtml?ero STORM SURGE: The combination of a dangerous storm surge and the tide will cause normally dry areas near the coast to be flooded by rising waters moving inland from the shoreline. The water could reach the following heights above ground somewhere in the indicated areas if the peak surge occurs at the time of high tide... Sargent, TX to Sabine Pass, TX...2-4 ft Galveston Bay...2-4 ft Mouth of the Rio Grande, TX to Sargent, TX...1-3 ft Sabine Pass, TX to Vermilion/Cameron Parish Line, LA...1-3 ft The deepest water will occur along the immediate coast near and to the north of the landfall location, where the surge will be accompanied by large and dangerous waves. Surge-related flooding depends on the relative timing of the surge and the tidal cycle, and can vary greatly over short distances. For information specific to your area, please see products issued by your local National Weather Service forecast office. For a complete depiction of areas at risk of storm surge inundation, please see the National Weather Service Peak Storm Surge Graphic, available at hurricanes.gov/graphics_at1.shtml?peakSurge. Storm surge will raise water levels by as much as 1 to 3 feet above normal tide levels along the immediate coast of northeastern Mexico in areas of onshore winds north of where the center makes landfall. Near the coast, the surge will be accompanied by large and destructive waves. WIND: Tropical storm conditions are expected within the warning area through this morning. TORNADOES: A tornado or two could occur this morning across parts of Deep South Texas. SURF: Swells generated by Alberto will affect the coast of Texas and northeastern Mexico through Friday. 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 1000 AM CDT. $$ Forecaster Kelly