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| #899336 (Received by flhurricane at: 1:44 AM 24.Aug.2017) TCPAT4 BULLETIN Tropical Storm Harvey Intermediate Advisory Number 14A NWS National Hurricane Center Miami FL AL092017 100 AM CDT Thu Aug 24 2017 ...AIR FORCE AND NOAA PLANES FIND HARVEY A LITTLE STRONGER... SUMMARY OF 100 AM CDT...0600 UTC...INFORMATION ---------------------------------------------- LOCATION...22.6N 92.6W ABOUT 465 MI...740 KM SSE OF PORT OCONNOR TEXAS ABOUT 410 MI...660 KM SE OF PORT MANSFIELD TEXAS MAXIMUM SUSTAINED WINDS...45 MPH...70 KM/H PRESENT MOVEMENT...NW OR 325 DEGREES AT 7 MPH...11 KM/H MINIMUM CENTRAL PRESSURE...1001 MB...29.56 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: None. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Storm Surge Watch is in effect for... * Port Mansfield to High Island A Hurricane Watch is in effect for... * North of Port Mansfield to San Luis Pass A Tropical Storm Watch is in effect for... * Boca De Catan Mexico to Port Mansfield Texas * North of San Luis Pass to High Island A Storm Surge Watch means there is a possibility of life- threatening inundation, from rising water moving inland from the coastline, in the indicated locations during the next 48 hours. For a depiction of areas at risk, please see the National Weather Service Storm Surge Watch/Warning Graphic, available at hurricanes.gov. A Hurricane Watch means that hurricane conditions are possible within the watch area. A watch is typically issued 48 hours before the anticipated first occurrence of tropical-storm-force winds, conditions that make outside preparations difficult or dangerous. A Tropical Storm Watch means that tropical storm conditions are possible within the watch area, generally within 48 hours. Warnings will likely be required for portions of the watch area this morning. In addition, interests in southwestern Louisiana should continue to monitor the progress of this system. For storm information specific to your area in the United States, including possible inland watches and warnings, please monitor products issued by your local National Weather Service forecast office. For storm information specific to your area outside the United States, please monitor products issued by your national meteorological service. DISCUSSION AND 48-HOUR OUTLOOK ------------------------------ At 100 AM CDT (0600 UTC), the center of Tropical Storm Harvey was located by NOAA and Air Force reconnaissance planes near latitude 22.6 North, longitude 92.6 West. Harvey is now moving toward the northwest near 7 mph (11 km/h). A track toward the northwest or north-northwest at a faster forward speed is expected for the next 48 hours. On the forecast track, Harvey should be approaching the Texas coast on Friday. Reports from an Air Force Reserve Hurricane Hunter aircraft indicate that the maximum sustained winds have increased to near 45 mph (70 km/h) with higher gusts. Some additional strengthening is forecast during the next 48 hours, and Harvey could become a a hurricane on Friday. Tropical-storm-force winds extend outward up to 100 miles (160 km) to the northeast of the center. The latest minimum central pressure reported by Air Force and NOAA Hurricane Hurricane Hunter planes was 1001 mb (29.56 inches). HAZARDS AFFECTING LAND ---------------------- RAINFALL: Harvey is expected to produce total rain accumulations of 10 to 15 inches and isolated maximum amounts of 20 inches over the Texas coast and southwest Louisiana through next Wednesday, with heavy rainfall beginning Friday. During the same time period Harvey is expected to produce total rain accumulations of 3 to 9 inches along its outer radius including parts of south, central, and eastern Texas and the lower Mississippi Valley. Rainfall from Harvey may cause life-threatening flooding. 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 is expected to reach the following heights above ground if the peak surge occurs at the time of high tide... Port Mansfield to High Island...4 to 6 ft The deepest water will occur along the immediate coast near and to the northeast of the landfall location, where the surge will be accompanied by large and destructive 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: Hurricane conditions are possible within the hurricane watch area late Friday or Friday night, with tropical storm conditions possible by Friday. SURF: Swells generated by Harvey are likely to affect the Texas, Louisiana, and northeast Mexico coasts by 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 400 AM CDT. $$ Forecaster Avila |
