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Tropical Storm Barry Public Advisory Number 9A
2019-07-12 19:49:18| National Hurricane Center (Atlantic)
Issued at 100 PM CDT Fri Jul 12 2019 000 WTNT32 KNHC 121749 TCPAT2 BULLETIN Tropical Storm Barry Intermediate Advisory Number 9A NWS National Hurricane Center Miami FL AL022019 100 PM CDT Fri Jul 12 2019 ...TROPICAL STORM CONDITIONS SPREADING ACROSS PORTIONS OF SOUTHEASTERN LOUISIANA... ...DANGEROUS STORM SURGE, HEAVY RAINS, AND WIND CONDITIONS EXPECTED ACROSS THE NORTH-CENTRAL GULF COAST... SUMMARY OF 100 PM CDT...1800 UTC...INFORMATION ---------------------------------------------- LOCATION...28.4N 90.6W ABOUT 105 MI...170 KM WSW OF THE MOUTH OF THE MISSISSIPPI RIVER ABOUT 100 MI...160 KM SSE OF MORGAN CITY LOUISIANA MAXIMUM SUSTAINED WINDS...65 MPH...100 KM/H PRESENT MOVEMENT...WNW OR 290 DEGREES AT 5 MPH...7 KM/H MINIMUM CENTRAL PRESSURE...993 MB...29.32 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY... None. SUMMARY OF WATCHES AND WARNINGS IN EFFECT... A Hurricane Warning is in effect for... * Intracoastal City to Grand Isle A Tropical Storm Warning is in effect for... * Mouth of the Pearl River to Grand Isle * Lake Pontchartrain and Lake Maurepas including metropolitan New Orleans * Intracoastal City to Cameron A Storm Surge Warning is in effect for... * Intracoastal City to Biloxi * Lake Pontchartrain A Storm Surge Watch is in effect for... * Biloxi to the Mississippi/Alabama border A Hurricane Watch is in effect for... * Mouth of the Mississippi River to Grand Isle * Intracoastal City to Cameron A Tropical Storm Watch is in effect for... * East of the Mouth of the Pearl River to the Mississippi/Alabama border A Hurricane Warning means that hurricane conditions are expected somewhere within the warning area. A warning is typically issued 36 hours before the anticipated first occurrence of tropical-storm-force winds, conditions that make outside preparations difficult or dangerous. 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 within 36 hours. 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 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. 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. Interests elsewhere along the Gulf Coast from the Upper Texas Coast to the Florida Panhandle should monitor the progress of this system. 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 PM CDT (1800 UTC), the center of Tropical Storm Barry was located near latitude 28.4 North, longitude 90.6 West. Barry is moving toward the west-northwest near 5 mph (7 km/h). A motion toward the northwest is expected to begin later today, followed by a turn toward the north Saturday night. On the forecast track, the center of Barry will approach the central or southeastern coast of Louisiana through tonight and then make landfall over the central Louisiana coast on Saturday. After landfall, Barry is expected to move generally northward through the Mississippi Valley through Sunday. Reports from an Air Force Reserve Hurricane Hunter aircraft indicate that maximum sustained winds are near 65 mph (100 km/h) with higher gusts. Strengthening is forecast before landfall, and Barry is expected to be a hurricane when the center reaches the Louisiana coast. Weakening is expected after Barry moves inland. Tropical-storm-force winds extend outward up to 175 miles (280 km) from the center. The NOAA automated station at the Southwest Pass of the Mississippi River recently reported sustained winds of 55 mph and a wind gust of 66 mph at an elevation of 125 ft. An oil rig located southwest of the Mouth of the Mississippi River recently reported sustained winds of 76 mph and a wind gust of 87 mph at an elevation of 295 ft. The minimum central pressure just reported by the Hurricane Hunter aircraft is 993 mb (29.32 inches). HAZARDS AFFECTING LAND ---------------------- Key Messages for Barry 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... Mouth of the Atchafalaya River to Shell Beach...3 to 6 ft Shell Beach to Biloxi MS...3 to 5 ft Intracoastal City to the Mouth of the Atchafalaya River...3 to 5 ft Lake Pontchartrain...3 to 5 ft Biloxi MS to the Mississippi/Alabama border...2 to 4 ft Lake Maurepas...1 to 3 ft 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. RAINFALL: Barry is expected to produce total rain accumulations of 10 to 20 inches over south-central and southeast Louisiana along with southwest Mississippi, with isolated maximum amounts of 25 inches. These rains are expected to lead to dangerous, life threatening flooding over portions of the central Gulf Coast into the Lower Mississippi Valley. Over the remainder of the Lower Mississippi Valley, total rain accumulations of 4 to 8 inches are expected, with isolated maximum amounts of 12 inches. WIND: Hurricane conditions are expected in the Hurricane Warning area tonight or Saturday, with tropical storm conditions beginning during the next few hours. Hurricane conditions are possible within the Hurricane Watch area by tonight or Saturday morning. Tropical storm conditions are spreading across the Tropical Storm Warning area in southeastern Louisiana at this time. Tropical storm conditions are possible in the Tropical Storm Watch area by tonight or Saturday. Wind gusts to tropical-storm force in squalls are possible along portions of the coasts of Alabama and the western Florida Panhandle through Saturday night. TORNADOES: A couple tornadoes are possible this afternoon through tonight across southeast Louisiana, far southern Mississippi, and the Alabama coast. NEXT ADVISORY ------------- Next complete advisory at 400 PM CDT. $$ Forecaster Beven
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