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Tropical Storm Marco Public Advisory Number 16A
2020-08-24 13:55:14| National Hurricane Center (Atlantic)
Issued at 700 AM CDT Mon Aug 24 2020 000 WTNT34 KNHC 241155 TCPAT4 BULLETIN Tropical Storm Marco Intermediate Advisory Number 16A NWS National Hurricane Center Miami FL AL142020 700 AM CDT Mon Aug 24 2020 ...MARCO PRODUCING HEAVY RAINFALL AND GUSTY WINDS ALONG PORTIONS OF THE NORTHERN GULF COAST... SUMMARY OF 700 AM CDT...1200 UTC...INFORMATION ---------------------------------------------- LOCATION...28.1N 88.4W ABOUT 85 MI...135 KM SSE OF THE MOUTH OF THE MISSISSIPPI RIVER MAXIMUM SUSTAINED WINDS...50 MPH...80 KM/H PRESENT MOVEMENT...NW OR 325 DEGREES AT 10 MPH...17 KM/H MINIMUM CENTRAL PRESSURE...1005 MB...29.68 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: None. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Storm Surge Warning is in effect for.... * Morgan City Louisiana to Ocean Springs Mississippi * Lake Borgne A Tropical Storm Warning is in effect for... * Intracoastal City to the Mississippi/Alabama border * Lake Pontchartrain, Lake Maurepas, and Metropolitan New Orleans 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, in this case within 12 to 24 hours. 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 700 AM CDT (1200 UTC), the center of Tropical Storm Marco was located near latitude 28.1 North, longitude 88.4 West. Marco is moving toward the northwest near 10 mph (17 km/h). Marco is forecast to approach the coast of Louisiana this afternoon, and then turn westward and move very close to the coast of Louisiana through Tuesday night. Data from an Air Force Reserve Hurricane Hunter aircraft indicate that maximum sustained winds have decreased to near 50 mph (80 km/h) with higher gusts. Further weakening is expected, and Marco is forecast to become a tropical depression late on Tuesday and dissipate on Wednesday. Tropical-storm-force winds extend outward up to 105 miles (165 km), primarily northeast of the center. The estimated minimum central pressure is 1005 mb (29.68 inches). HAZARDS AFFECTING LAND ---------------------- 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... Morgan City LA to Ocean Springs MS, including Lake Borgne...2-4 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 start by this afternoon in portions of the warning area. RAINFALL: Marco is expected to produce total rainfall accumulations of 3 to 5 inches with isolated maximum amounts of 10 inches across portions of the northeast and north-central Gulf coast through Tuesday. This rainfall may result in areas of flash, urban and small stream flooding in the area. SURF: Swells generated by Marco are likely to affect portions of the northern Gulf Coast for 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. TORNADOES: A couple of tornadoes will be possible today from southeast Louisiana to the western Florida Panhandle. NEXT ADVISORY ------------- Next complete advisory at 1000 AM CDT. $$ Forecaster Latto
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Atlantic Tropical Weather Outlook
2020-08-24 13:53:45| National Hurricane Center (Atlantic)
000 ABNT20 KNHC 241153 TWOAT Tropical Weather Outlook NWS National Hurricane Center Miami FL 800 AM EDT Mon Aug 24 2020 For the North Atlantic...Caribbean Sea and the Gulf of Mexico: The National Hurricane Center is issuing advisories on Tropical Storm Laura, located just off the southern coast of Cuba, and on Tropical Storm Marco, located over the north-central Gulf of Mexico. Tropical cyclone formation is not expected during the next 5 days. $$ Forecaster Berg
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Eastern North Pacific Tropical Weather Outlook
2020-08-24 13:38:02| National Hurricane Center (East Pacific)
000 ABPZ20 KNHC 241137 TWOEP Tropical Weather Outlook NWS National Hurricane Center Miami FL 500 AM PDT Mon Aug 24 2020 For the eastern North Pacific...east of 140 degrees west longitude: An elongated zone of disturbed weather is located several hundred miles south-southwest of the southern tip of the Baja California peninsula. This weather is expected to consolidate in a couple of days, and environmental conditions appear conducive for a tropical depression to form later this week while the system meanders or drifts northward a few hundred miles offshore of the coast of southwestern Mexico. * Formation chance through 48 hours...high...70 percent. * Formation chance through 5 days...high...90 percent. A small low pressure area located a couple of hundred miles southwest of the Gulf of Tehuantepec continues to produce disorganized shower and thunderstorm activity. Conditions appear conducive for additional development of this system if it does not move inland over Mexico, and a tropical depression is likely to form within the next couple of days while it moves slowly northwestward, near or parallel to the southwestern coast of Mexico. Regardless of development, areas of heavy rainfall and flash flooding are likely in southeastern Mexico and northern Central America during the next several days. * Formation chance through 48 hours...high...70 percent. * Formation chance through 5 days...high...80 percent. && For more information on the system several hundred miles south-southwest of the southern tip of the Baja California peninsula, see High Seas Forecasts issued by the National Weather Service under AWIPS header NFDHSFEPI, WMO header FZPN02 KWBC, and on the web at ocean.weather.gov/shtml/NFDHSFEPI.php $$ Forecaster Berg
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Tropical Storm Marco Potential Storm Surge Flooding Map
2020-08-24 11:37:31| National Hurricane Center (Atlantic)
Potential Storm Surge Flooding Map last updated Mon, 24 Aug 2020 09:37:31 GMT
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Tropical Storm Marco Probabilistic Storm Surge Graphics
2020-08-24 11:24:05| National Hurricane Center (Atlantic)
Probabilistic Storm Surge Graphics last updated Mon, 24 Aug 2020 09:24:05 GMT
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