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Tropical Storm Hanna Forecast Advisory Number 15
2020-07-26 16:44:44| National Hurricane Center (Atlantic)
Issued at 1500 UTC SUN JUL 26 2020 705 WTNT23 KNHC 261444 TCMAT3 TROPICAL STORM HANNA FORECAST/ADVISORY NUMBER 15 NWS NATIONAL HURRICANE CENTER MIAMI FL AL082020 1500 UTC SUN JUL 26 2020 CHANGES IN WATCHES AND WARNINGS WITH THIS ADVISORY... THE TROPICAL STORM WARNING ALONG THE COAST OF TEXAS SOUTH OF BAFFIN BAY HAS BEEN DISCONTINUED. SUMMARY OF WATCHES AND WARNINGS IN EFFECT... A TROPICAL STORM WARNING IS IN EFFECT FOR... * BARRA EL MEZQUITAL MEXICO TO THE MOUTH OF THE RIO GRANDE INTERESTS IN NORTHEASTERN MEXICO SHOULD MONITOR THE PROGRESS OF HANNA. TROPICAL STORM CENTER LOCATED NEAR 26.1N 99.7W AT 26/1500Z POSITION ACCURATE WITHIN 40 NM PRESENT MOVEMENT TOWARD THE WEST-SOUTHWEST OR 250 DEGREES AT 8 KT ESTIMATED MINIMUM CENTRAL PRESSURE 995 MB MAX SUSTAINED WINDS 40 KT WITH GUSTS TO 50 KT. 34 KT....... 60NE 90SE 30SW 30NW. WINDS AND SEAS VARY GREATLY IN EACH QUADRANT. RADII IN NAUTICAL MILES ARE THE LARGEST RADII EXPECTED ANYWHERE IN THAT QUADRANT. REPEAT...CENTER LOCATED NEAR 26.1N 99.7W AT 26/1500Z AT 26/1200Z CENTER WAS LOCATED NEAR 26.2N 99.2W FORECAST VALID 27/0000Z 25.5N 100.6W...INLAND MAX WIND 30 KT...GUSTS 40 KT. FORECAST VALID 27/1200Z 25.0N 101.9W...INLAND MAX WIND 25 KT...GUSTS 35 KT. FORECAST VALID 28/0000Z 24.9N 102.9W...POST-TROP/INLAND MAX WIND 20 KT...GUSTS 30 KT. FORECAST VALID 28/1200Z...DISSIPATED REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 26.1N 99.7W INTERMEDIATE PUBLIC ADVISORY...WTNT33 KNHC/MIATCPAT3...AT 26/1800Z NEXT ADVISORY AT 26/2100Z $$ FORECASTER BROWN
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Tropical Storm Hanna Public Advisory Number 15
2020-07-26 16:44:44| National Hurricane Center (Atlantic)
Issued at 1000 AM CDT Sun Jul 26 2020 704 WTNT33 KNHC 261444 TCPAT3 BULLETIN Tropical Storm Hanna Advisory Number 15 NWS National Hurricane Center Miami FL AL082020 1000 AM CDT Sun Jul 26 2020 ...CENTER OF HANNA CONTINUES TO MOVE INLAND OVER NORTHEASTERN MEXICO... ...HEAVY RAIN AND DANGEROUS FLASH FLOODING CONTINUES OVER FAR SOUTHEAST TEXAS AND NORTHEAST MEXICO... SUMMARY OF 1000 AM CDT...1500 UTC...INFORMATION ----------------------------------------------- LOCATION...26.1N 99.7W ABOUT 75 MI...120 KM NE OF MONTERREY MEXICO ABOUT 90 MI...150 KM W OF MCALLEN TEXAS MAXIMUM SUSTAINED WINDS...45 MPH...75 KM/H PRESENT MOVEMENT...WSW OR 250 DEGREES AT 9 MPH...15 KM/H MINIMUM CENTRAL PRESSURE...995 MB...29.39 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: The Tropical Storm Warning along the coast of Texas south of Baffin Bay has been discontinued. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Tropical Storm Warning is in effect for... * Barra el Mezquital Mexico to the Mouth of the Rio Grande 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 1000 AM CDT (1500 UTC), the center of Tropical Storm Hanna was located near latitude 26.1 North, longitude 99.7 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 45 mph (75 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. The estimated minimum central pressure is 995 mb (29.39 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 several hours, and along the coast of Mexico within the warning area for a few more 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 intermediate advisory at 100 PM CDT. Next complete advisory at 400 PM CDT. $$ Forecaster Brown
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Tropical Storm Hanna Graphics
2020-07-26 13:52:37| National Hurricane Center (Atlantic)
5-Day Uncertainty Track last updated Sun, 26 Jul 2020 11:52:37 GMT Wind Speed Probabilities last updated Sun, 26 Jul 2020 09:24:46 GMT
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Tropical Storm Hanna Public Advisory Number 14A
2020-07-26 13:51:43| National Hurricane Center (Atlantic)
Issued at 700 AM CDT Sun Jul 26 2020 000 WTNT33 KNHC 261151 TCPAT3 BULLETIN Tropical Storm Hanna Intermediate Advisory Number 14A NWS National Hurricane Center Miami FL AL082020 700 AM CDT Sun Jul 26 2020 ...HANNA PRODUCING HEAVY RAIN AND DANGEROUS FLASH FLOODING OVER FAR SOUTHEAST TEXAS AND NORTHEAST MEXICO... SUMMARY OF 700 AM CDT...1200 UTC...INFORMATION ---------------------------------------------- LOCATION...26.2N 99.1W ABOUT 55 MI...85 KM W OF MCALLEN TEXAS ABOUT 110 MI...175 KM ENE OF MONTERREY MEXICO MAXIMUM SUSTAINED WINDS...50 MPH...85 KM/H PRESENT MOVEMENT...WSW OR 250 DEGREES AT 9 MPH...15 KM/H MINIMUM CENTRAL PRESSURE...992 MB...29.29 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: None SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Tropical Storm Warning is in effect for... * Barra el Mezquital Mexico to Baffin Bay Texas Interests in northeastern Mexico should monitor the progress of Hanna. For storm information specific to your area, including possible inland watches and warnings, please monitor products issued by your local National Weather Service forecast office. DISCUSSION AND OUTLOOK ---------------------- At 700 AM CDT (1200 UTC), the center of Tropical Storm Hanna was located near latitude 26.2 North, longitude 99.1 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 are near 50 mph (85 km/h) with higher gusts. Rapid 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 115 miles (185 km) mainly over water to the east of the center. A wind gust of 49 mph (80 km/h) was reported within the past couple of hours at Port Isabel-Cameron County Airport. The estimated minimum central pressure is 992 mb (29.29 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 morning. 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 several hours, and along the Texas and northeastern Mexican coast in the warning area for a few more hours. RAINFALL: Hanna is expected to produce total rain accumulations of 6 to 12 inches, with isolated maximum amounts of 18 inches through Monday in south Texas and into the Mexican states of Coahuila, Nuevo Leon, and northern Tamaulipas. This rain will produce life-threatening flash flooding, rapid rises on small streams, and isolated minor to moderate river flooding. Hanna is also expected to produce 2 to 4 inches of rain along the upper Texas and Louisiana coasts. 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 1000 AM CDT. $$ Forecaster Brown/Zelinsky
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Tropical Storm Hanna Forecast Discussion Number 14
2020-07-26 10:53:42| National Hurricane Center (Atlantic)
Issued at 400 AM CDT Sun Jul 26 2020 000 WTNT43 KNHC 260853 TCDAT3 Tropical Storm Hanna Discussion Number 14 NWS National Hurricane Center Miami FL AL082020 400 AM CDT Sun Jul 26 2020 Hanna continues to weaken as the center crosses the Rio Grande River from Texas into northeastern Mexico. Satellite imagery shows some warming of the cloud tops near the center, and WSR-88D radar data shows that only about a third of the previous eyewall is still present to the southeast of the center. The storm is generating a vigorous outer convective band over the eastern semicircle. The initial intensity is reduced to 50 kt based mainly on Doppler radar winds of 50-65 kt at about 9000 ft to the northeast of the center, and it is possible that this is generous. The initial motion remains west-southwestward or 250/8 kt. The mid-level ridge over the central United States should continue to steer Hanna west-southwestward until dissipation, and the new NHC forecast track is little changed from the previous forecast. Hanna should rapidly weaken as it moves over northeastern Mexico, with the system expected to weaken to a depression in 12-18 h, if not sooner. The system is expected to dissipate completely over the rugged terrain of Mexico between 36-48 h. The radar signature of the storm has weakened to the point where there will be no more hourly position updates between advisories. Key Messages 1. Tropical storm conditions are expected to persist for several more hours near the center of Hanna, and for a few more hours in the warning area along the coast of Texas and northeastern Mexico. 2. Hanna is expected to produce heavy rains across portions of southern Texas and northeastern Mexico. These rains will result in life-threatening flash flooding and isolated minor to moderate river flooding. 3. Storm surge along the Texas coast should diminish today. FORECAST POSITIONS AND MAX WINDS INIT 26/0900Z 26.3N 98.9W 50 KT 60 MPH...INLAND 12H 26/1800Z 25.8N 99.9W 35 KT 40 MPH...INLAND 24H 27/0600Z 25.1N 101.4W 25 KT 30 MPH...INLAND 36H 27/1800Z 24.5N 102.7W 20 KT 25 MPH...POST-TROP/INLAND 48H 28/0600Z...DISSIPATED $$ Forecaster Beven
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