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Tropical Storm Beta Public Advisory Number 18A
2020-09-22 07:54:29| National Hurricane Center (Atlantic)
Issued at 100 AM CDT Tue Sep 22 2020 000 WTNT32 KNHC 220554 TCPAT2 BULLETIN Tropical Storm Beta Intermediate Advisory Number 18A NWS National Hurricane Center Miami FL AL222020 100 AM CDT Tue Sep 22 2020 ...CENTER OF BETA MOVING FARTHER INLAND NEAR LAVACA BAY... ...HEAVY RAINS CONTINUE OVER PORTIONS OF THE MIDDLE AND UPPER TEXAS COAST... SUMMARY OF 100 AM CDT...0600 UTC...INFORMATION ---------------------------------------------- LOCATION...28.6N 96.5W ABOUT 10 MI...20 KM ESE OF PORT LAVACA TEXAS ABOUT 15 MI...25 KM NNW OF PORT OCONNOR TEXAS MAXIMUM SUSTAINED WINDS...40 MPH...65 KM/H PRESENT MOVEMENT...NW OR 325 DEGREES AT 3 MPH...6 KM/H MINIMUM CENTRAL PRESSURE...1000 MB...29.53 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: The Storm Surge Warning from Port Aransas, Texas, to Sargent, Texas, has been discontinued. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Storm Surge Warning is in effect for... * Sargent Texas to Sabine Pass including Galveston Bay A Tropical Storm Warning is in effect for... * Port Aransas Texas to Morgan City Louisiana A Storm Surge Warning means there is a danger of life-threatening inundation, from rising water moving inland from the coastline, during the next 36 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 Tropical Storm Warning means that tropical storm conditions are expected somewhere within the warning area. 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 100 AM CDT (0600 UTC), the center of Tropical Storm Beta was located near latitude 28.6 North, longitude 96.5 West. Beta is moving toward the northwest near 3 mph (6 km/h). A slow north to northeast motion is expected today, and a faster east-northeastward motion should begin tonight and continue on Wednesday. On the forecast track, the center of Beta will move near the coast of southeastern Texas today and on Wednesday. Surface observations and satellite-derived wind data indicate that the maximum sustained winds have decreased to near 40 mph (65 km/h) with higher gusts. Additional weakening is anticipated during the next few days. Tropical-storm-force winds extend outward up to 125 miles (205 km) from the center. A wind gust to 48 mph (78 km/h) was reported at Port Lavaca, Texas, over the past couple of hours. The estimated minimum central pressure based on surface observations is 1000 mb (29.53 inches). HAZARDS AFFECTING LAND ---------------------- Key messages for Beta can be found in the Tropical Cyclone Discussion under AWIPS header MIATCDAT2 and WMO header WTNT42 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... Sargent, TX to Sabine Pass including Galveston Bay...2-4 ft Sabine Pass to Ocean Springs, MS including Sabine Lake, Calcasieu Lake, Vermilion Bay, Lake Borgne, Lake Pontchartrain, and Lake Maurepas...1-3 ft Baffin Bay, TX to Sargent, TX including Copano Bay, Aransas Bay, San Antonio Bay, Matagorda Bay, Corpus Christi Bay and Baffin Bay... 1-3 ft Mouth of the Rio Grande to Baffin Bay, TX...1-2 ft The deepest water will occur along the immediate coast in areas of onshore winds, 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. WIND: Tropical storm conditions are expected to continue within portions of the tropical storm warning area today. RAINFALL: Through Friday, Beta is expected to produce rainfall accumulations of 5 to 10 inches with isolated totals of 15 inches from the middle Texas coast to southeast Louisiana. Rainfall totals of 3 to 5 inches are expected northward into the ArkLaTex region and east into the Lower Mississippi Valley through the end of the week. Flash and urban flooding is likely, as well as isolated minor river flooding. TORNADOES: A tornado or two could occur today near the middle to upper Texas coast or the southwestern Louisiana coast. SURF: Swells generated by a combination of Beta and a cold front over the northern Gulf of Mexico will continue along the coasts of Louisiana and Texas 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. NEXT ADVISORY ------------- Next complete advisory at 400 AM CDT. $$ Forecaster Berg
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