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| #1009793 (Received by flhurricane at: 1:48 PM 26.Jul.2020) TCPAT3 BULLETIN Tropical Storm Hanna Intermediate Advisory Number 15A NWS National Hurricane Center Miami FL AL082020 100 PM CDT Sun Jul 26 2020 ...HANNA MOVING WEST-SOUTHWESTWARD OVER NORTHEASTERN MEXICO... ...HEAVY RAIN AND DANGEROUS FLASH FLOODING CONTINUES OVER FAR SOUTHEAST TEXAS AND NORTHEAST MEXICO... SUMMARY OF 100 PM CDT...1800 UTC...INFORMATION ---------------------------------------------- LOCATION...25.9N 100.1W ABOUT 10 MI...15 KM N OF MONTERREY MEXICO MAXIMUM SUSTAINED WINDS...40 MPH...65 KM/H PRESENT MOVEMENT...WSW OR 250 DEGREES AT 9 MPH...15 KM/H MINIMUM CENTRAL PRESSURE...1000 MB...29.53 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: The government of Mexico has discontinued the Tropical Storm Watch along the coast of northeastern Mexico. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: There are no coastal watches or warnings in effect. Interests in northeastern Mexico should monitor the progress of Hanna. 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 Hanna was located near latitude 25.9 North, longitude 100.1 West. Hanna is moving toward the west-southwest near 9 mph (15 km/h) and this motion is expected to continue through Monday. On the forecast track, the center of Hanna should continue to move farther inland over northeastern Mexico through tonight. Maximum sustained winds have decreased to near 40 mph (65 km/h) with higher gusts. Additional weakening is expected as the center of Hanna moves farther inland, and the cyclone is expected to weaken to a tropical depression later today and dissipate Monday or Monday night. Tropical-storm-force winds extend outward up to 105 miles (165 km) from the center. A wind gust to 39 mph (63 km/h) was recently reported at Monterrey, Mexico. The estimated minimum central pressure is 1000 mb (29.53 inches). HAZARDS AFFECTING LAND ---------------------- Key messages for Hanna can be found in the Tropical Cyclone Discussion under AWIPS header MIATCDAT3, WMO header WTNT43 KNHC and on the web at www.hurricanes.gov/text/MIATCDAT3.shtml. STORM SURGE: Water levels along the Texas coast will gradually subside through this afternoon. Consult products issued by your local National Weather Service forecast office for additional information. WIND: Tropical storm conditions will continue near the center of Hanna for the next few hours. RAINFALL: Hanna is expected to produce the following rain accumulations and flood threats through Monday: South Texas...Additional 2 to 5 inches. Storm total amounts 6 to 12 inches, isolated 16 inches. Northern Mexican states of Coahuila, Nuevo Leon, Tamaulipas...6 to 12 inches, isolated 16 inches. Northern Mexican states of northern Zacatecas and eastern Durango...1 to 4 inches. This rain will produce life-threatening flash flooding, rapid rises on small streams, and isolated minor to moderate river flooding in South Texas. Flash flooding and mudslides are likely across Northern Mexican states. SURF: Swells generated by Hanna will continue to affect much of the Texas and Louisiana coasts for another day or so. These swells are likely to cause life-threatening surf and rip current conditions. Please consult products from your local weather office. TORNADOES: A few tornadoes are possible today into this evening across parts of south Texas. NEXT ADVISORY ------------- Next complete advisory at 400 PM CDT. $$ Forecaster Brown |