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Tropical Storm Hanna Public Advisory Number 8A
2020-07-25 01:56:22| National Hurricane Center (Atlantic)
Issued at 700 PM CDT Fri Jul 24 2020 000 WTNT33 KNHC 242356 TCPAT3 BULLETIN Tropical Storm Hanna Intermediate Advisory Number 8A NWS National Hurricane Center Miami FL AL082020 700 PM CDT Fri Jul 24 2020 ...HANNA FORECAST TO MAKE LANDFALL AS A HURRICANE IN SOUTH TEXAS TOMORROW... ...CONDITIONS EXPECTED TO DETERIORATE OVERNIGHT... SUMMARY OF 700 PM CDT...0000 UTC...INFORMATION ---------------------------------------------- LOCATION...27.3N 94.4W ABOUT 190 MI...300 KM E OF CORPUS CHRISTI TEXAS ABOUT 195 MI...305 KM ENE OF PORT MANSFIELD TEXAS MAXIMUM SUSTAINED WINDS...50 MPH...85 KM/H PRESENT MOVEMENT...W OR 275 DEGREES AT 10 MPH...17 KM/H MINIMUM CENTRAL PRESSURE...998 MB...29.47 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: None. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Storm Surge Warning is in effect for... * Baffin Bay to Sargent Texas A Hurricane Warning is in effect for... * Baffin Bay to Mesquite Bay Texas A Tropical Storm Warning is in effect for... * Mouth of the Rio Grande to Baffin Bay Texas * Mesquite Bay to San Luis Pass Texas A Storm Surge Warning means there is a danger of life-threatening inundation, from rising water moving inland from the coastline, during the next 24 hours in the indicated locations. For a depiction of areas at risk, please see the National Weather Service Storm Surge Watch/Warning Graphic, available at hurricanes.gov. This is a life-threatening situation. Persons located within these areas should take all necessary actions to protect life and property from rising water and the potential for other dangerous conditions. Promptly follow evacuation and other instructions from local officials. A Hurricane Warning means that hurricane conditions are expected somewhere within the warning area, in this case within the next 24 hours. Preparations to protect life and property should be rushed to completion. A Tropical Storm Warning means that tropical storm conditions are expected somewhere within the warning area, in this case within the next 24 hours. Interests elsewhere along the Texas and Louisiana coasts 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 PM CDT (0000 UTC), the center of Tropical Storm Hanna was located near latitude 27.3 North, longitude 94.4 West. Hanna is moving toward the west near 10 mph (17 km/h), and this motion should continue through Saturday morning. A gradual turn toward the west-southwest is expected Saturday night and that motion should continue through Sunday. On the forecast track, the center of Hanna should make landfall along the Texas coast within the hurricane warning area Saturday afternoon or early evening. Maximum sustained winds are near 50 mph (85 km/h) with higher gusts. Strengthening is forecast, and Hanna is expected to become a hurricane before the cyclone makes landfall on Saturday. Steady to rapid weakening is expected after Hanna moves inland. Tropical-storm-force winds extend outward up to 60 miles (95 km) from the center. The estimated minimum central pressure based on surface observations is 998 mb (29.47 inches). HAZARDS AFFECTING LAND ---------------------- Key messages for Hanna can be found in the Tropical Cyclone Discussion under AWIPS header MIATCDAT3 and WMO header WTNT43 KNHC. 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... Baffin Bay to Sargent TX...including Corpus Christi Bay, Copano Bay, Aransas Bay, San Antonio Bay, and Matagorda Bay...2 to 4 ft Mouth of the Rio Grande to Baffin Bay TX...1 to 3 ft North of Sargent to High Island TX...including Galveston Bay...1 to 2 ft The deepest water will occur along the immediate coast near and to the right of the landfall location. 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. WIND: Hurricane conditions are expected in the warning area Saturday afternoon. Tropical storm conditions are expected to begin in the warning area later tonight or Saturday morning. RAINFALL: Hanna is expected to produce 5 to 10 inches of rain with isolated maximum totals of 15 inches through Sunday night in south Texas and into the Mexican states of Coahuila, Nuevo Leon, and northern Tamaulipas. This rain may result in life-threatening flash flooding, rapid rises on small streams, and isolated minor to moderate river flooding in south Texas. 3 to 5 inches of rain is expected along the upper Texas and Louisiana coasts. SURF: Swells generated by Hanna are expected to increase and affect much of the Texas and Louisiana coasts during the next couple of days. These swells are likely to cause life-threatening surf and rip current conditions. Please consult products from your local weather office. TORNADOES: A brief tornado or two will be possible, mainly overnight, across portions of the upper Texas and Louisiana Coasts. NEXT ADVISORY ------------- Next complete advisory at 1000 PM CDT. $$ Forecaster Cangialosi
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