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Tropical Storm Harvey Public Advisory Number 37A
2017-08-29 19:50:43| National Hurricane Center (Atlantic)
Issued at 100 PM CDT Tue Aug 29 2017 000 WTNT34 KNHC 291750 TCPAT4 BULLETIN Tropical Storm Harvey Intermediate Advisory Number 37A NWS National Hurricane Center Miami FL AL092017 100 PM CDT Tue Aug 29 2017 ...HARVEY CONTINUES TO DUMP CATASTROPHIC RAINS OVER SOUTHEASTERN TEXAS AND SOUTHWESTERN LOUISIANA... SUMMARY OF 100 PM CDT...1800 UTC...INFORMATION ---------------------------------------------- LOCATION...28.8N 94.3W ABOUT 80 MI...130 KM SSW OF PORT ARTHUR TEXAS ABOUT 95 MI...155 KM SW OF CAMERON LOUISIANA MAXIMUM SUSTAINED WINDS...45 MPH...75 KM/H PRESENT MOVEMENT...NNE OR 20 DEGREES AT 8 MPH...13 KM/H MINIMUM CENTRAL PRESSURE...997 MB...29.44 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: None SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Tropical Storm Warning is in effect for... * North of Port O'Connor to Morgan City Louisiana A Tropical Storm Watch is in effect for... * East of Morgan City to Grand Isle A Storm Surge Watch is in effect for... * Port Bolivar to Morgan City Catastrophic and life-threatening flooding continues in southeastern Texas and portions of southwestern Louisiana. Please see warnings and other products issued by your local National Weather Service office for additional information on this life-threatening situation. 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. 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 100 PM CDT (1800 UTC), the center of Tropical Storm Harvey was located near latitude 28.8 North, longitude 94.3 West. Harvey is moving a little faster toward the north-northeast near 8 mph (13 km/h), and this general motion is expected to continue today and tomorrow. On the forecast track, the center of Harvey is expected to move inland over the northwestern Gulf within the tropical storm warning area later tonight or early Wednesday. Maximum sustained winds remain near 45 mph (75 km/h) with higher gusts. An Air Force plane is currently approaching the center of Harvey. No significant change in strength is expected before the center moves inland. A gradual weakening should begin thereafter. Tropical-storm-force winds extend outward up to 160 miles (260 km) mainly to the east of the center. The estimated minimum central pressure is 997 mb (29.44 inches). HAZARDS AFFECTING LAND ---------------------- RAINFALL: Harvey is expected to produce additional rainfall accumulations of 6 to 12 inches through Friday over parts of the upper Texas coast into southwestern Louisiana. Isolated storm totals may reach 50 inches over the upper Texas coast, including the Houston/Galveston metropolitan area. These rains are currently producing catastrophic and life-threatening flooding over large portions of southeastern Texas and southwestern Louisiana. DO NOT ATTEMPT TO TRAVEL IN THE AFFECTED AREA IF YOU ARE IN A SAFE PLACE. DO NOT DRIVE INTO FLOODED ROADWAYS. Please see warnings and products issued by your local National Weather Service office for additional information on this life-threatening situation. Elsewhere, Harvey is expected to produce additional rainfall amounts of 5 to 10 inches across portions of southern Louisiana into coastal Mississippi and Alabama. Rainfall associated with Harvey will spread north by mid to late week, with rainfall amounts of 4 to 8 inches spreading into portions of Arkansas and the Tennessee Valley. A preliminary report from one Texas rain gauge has broken the Texas tropical cyclone rainfall record. Southeast of Houston, Mary's Creek at Winding Road reported 49.32 inches as of 9 am CDT. This total is higher than the previous record of 48 inches set during tropical cyclone Amelia of 1978 at Medina, Texas. 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... San Luis Pass to Morgan City including Galveston Bay...1 to 3 ft The deepest water will occur along the immediate coast near the area of onshore winds. 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 over portions of the warning area along the coast and are likely to persist during the next day or so. Tropical storms conditions are possible within the watch area within the next 24 hours. SURF: Swells generated by Harvey are still affecting the coasts of Texas and Louisiana. 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 from extreme southeast Texas across parts of southern Louisiana, coastal Mississippi and coastal Alabama. NEXT ADVISORY ------------- Next complete advisory at 400 PM CDT. $$ Forecaster Avila
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