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Tropical Storm Harvey Public Advisory Number 27
2017-08-27 04:45:53| National Hurricane Center (Atlantic)
Issued at 1000 PM CDT Sat Aug 26 2017 000 WTNT34 KNHC 270245 TCPAT4 BULLETIN Tropical Storm Harvey Advisory Number 27 NWS National Hurricane Center Miami FL AL092017 1000 PM CDT Sat Aug 26 2017 ...HARVEY WEAKENING AS IT DRIFTS OVER SOUTHEASTERN TEXAS... ...TORRENTIAL RAINS WILL CONTINUE... SUMMARY OF 1000 PM CDT...0300 UTC...INFORMATION ----------------------------------------------- LOCATION...29.3N 97.3W ABOUT 40 MI...65 KM NW OF VICTORIA TEXAS ABOUT 75 MI...115 KM E OF SAN ANTONIO TEXAS MAXIMUM SUSTAINED WINDS...50 MPH...85 KM/H PRESENT MOVEMENT...ENE OR 60 DEGREES AT 1 MPH...2 KM/H MINIMUM CENTRAL PRESSURE...994 MB...29.36 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: The Storm Surge Warning and the Tropical Storm Warning are discontinued north of Sargent Texas. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Storm Surge Warning is in effect for... * Port Aransas to Sargent Texas A Tropical Storm Warning is in effect for... * Baffin Bay to Sargent Texas A Storm Surge Warning means there is a danger of life-threatening inundation from rising water moving inland from the coastline 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. 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 48-HOUR OUTLOOK ------------------------------ At 1000 PM CDT (0300 UTC), the center of Tropical Storm Harvey was located near latitude 29.3 North, longitude 97.3 West. Harvey is drifting east-northeastward. A drift toward the south or southeast is expected during the next couple of days. On the forecast track, the center of Harvey is expected to remain inland over southeastern Texas. Maximum sustained winds have decreased to near 50 mph (85 km/h) with higher gusts. Additional weakening is forecast during the next 48 hours, and Harvey is likely to weaken to a tropical depression on Sunday. Tropical-storm-force winds extend outward up to 115 miles (185 km) from the center. During the past few hours, the airport at New Braunfels, Texas has reported sustained winds of 41 mph (67 km/h) and a gust of 58 mph (93 km/h). The estimated minimum central pressure is 994 mb (29.36 inches). HAZARDS AFFECTING LAND ---------------------- RAINFALL: Harvey is expected to produce additional rain accumulations of 15 to 25 inches over the middle and upper Texas coast through Thursday. Isolated storm totals may reach around 40 inches in this area. Rainfall of this magnitude will cause catastrophic and life-threatening flooding. Elsewhere during the same time period, Harvey is expected to produce total rain accumulations of 5 to 15 inches farther south toward the lower Texas coast, farther west toward the the Texas Hill Country, and farther east through southwest and central Louisiana. A list of rainfall observations compiled by the NOAA Weather Prediction Center can be found at: www.wpc.ncep.noaa.gov/discussions/nfdscc1.html 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 Aransas to Sargent...3 to 6 ft Sargent to High Island including Galveston Bay...1 to 3 ft High Island to Morgan City...1 to 2 ft The deepest water will occur along the immediate coast near the area of onshore winds, 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: Tropical storm conditions are occurring in an area near the center and over portions of the tropical storm warning area along the coast. These conditions are likely to persist through Sunday morning. SURF: Swells generated by Harvey affecting the coasts of Texas and Louisiana should subside through Sunday morning. 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 through Monday near the middle and upper Texas coast into far southwest Louisiana. NEXT ADVISORY ------------- Next intermediate advisory at 100 AM CDT. Next complete advisory at 400 AM CDT. $$ Forecaster Beven
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