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Tropical Storm Marco Public Advisory Number 12A
2020-08-23 13:54:30| National Hurricane Center (Atlantic)
Issued at 700 AM CDT Sun Aug 23 2020 000 WTNT34 KNHC 231154 TCPAT4 BULLETIN Tropical Storm Marco Intermediate Advisory Number 12A NWS National Hurricane Center Miami FL AL142020 700 AM CDT Sun Aug 23 2020 ...MARCO NEARING HURRICANE STRENGTH AS IT CROSSES THE SOUTHEASTERN GULF OF MEXICO... SUMMARY OF 700 AM CDT...1200 UTC...INFORMATION ---------------------------------------------- LOCATION...24.2N 87.1W ABOUT 210 MI...340 KM NW OF THE WESTERN TIP OF CUBA ABOUT 360 MI...580 KM SSE OF THE MOUTH OF THE MISSISSIPPI RIVER MAXIMUM SUSTAINED WINDS...70 MPH...110 KM/H PRESENT MOVEMENT...NNW OR 335 DEGREES AT 13 MPH...20 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 Storm Surge Warning is in effect for.... * Morgan City Louisiana to Ocean Springs Mississippi * Lake Borgne A Hurricane Warning is in effect for... * Morgan City Louisiana to the Mouth of the Pearl River A Storm Surge Watch is in effect for... * Sabine Pass to Morgan City Louisiana * Ocean Springs to the Alabama/Florida border * Lake Pontchartrain, Lake Maurepas, and Mobile Bay A Hurricane Watch is in effect for... * Intracoastal City Louisiana to west of Morgan City * Lake Pontchartrain, Lake Maurepas, and Metropolitan New Orleans A Tropical Storm Warning is in effect for... * Mouth of the Pearl River to the Mississippi/Alabama border * Lake Pontchartrain, Lake Maurepas, and Metropolitan New Orleans A Tropical Storm Watch is in effect for... * Mississippi/Alabama border to the Alabama/Florida border 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 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 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 Tropical Storm Warning means that tropical storm conditions are expected somewhere within the warning area within 36 hours. A Tropical Storm Watch means that tropical storm conditions are possible within the watch area, generally within 48 hours. 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 of the United States, please monitor products issued by your national meteorological service. DISCUSSION AND OUTLOOK ---------------------- At 700 AM CDT (1200 UTC), the center of Tropical Storm Marco was located near latitude 24.2 North, longitude 87.1 West. Marco is moving toward the north-northwest near 13 mph (20 km/h). Marco is forecast to continue moving north-northwestward across the central Gulf of Mexico today and will approach southeastern Louisiana on Monday. A gradual turn toward the west with a decrease in forward speed is expected after Marco moves inland on Monday and on Tuesday. Maximum sustained winds are near 70 mph (110 km/h) with higher gusts. Some strengthening is anticipated and Marco is forecast to become a hurricane later today and be at hurricane strength when it approaches the northern Gulf Coast on Monday. Rapid weakening is expected after Marco moves inland. Tropical-storm-force winds extend outward up to 60 miles (95 km) from the center. The estimated minimum central pressure based on data from the Air Force Reserve Hurricane Hunter aircraft is 994 mb (29.36 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... Sabine Pass to Morgan City LA...2-4 ft Morgan City LA to Ocean Springs MS including Lake Borgne...4-6 ft Ocean Springs MS to the AL/FL Border including Mobile Bay...2-4 ft Lake Pontchartrain and Lake Maurepas...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 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 expected within the hurricane warning area by midday Monday, with tropical storm conditions possible by early Monday. Tropical storm conditions are possible within the tropical storm watch area on Monday, and hurricane conditions are possible within the hurricane watch areas late Monday. RAINFALL: Marco is expected to produce rainfall accumulations of 2 to 4 inches with isolated maximum amounts of 6 inches across the Central U.S. Gulf coast through Tuesday. This rainfall may result in isolated areas of flash and urban flooding along the Central U.S. Gulf Coast. SURF: Swells generated by Marco are likely to affect portions of the northern Gulf Coast later today. These swells are likely to cause life-threatening surf and rip current conditions. Please consult products from your local weather office. TORNADOES: An isolated tornado will be possible early Monday morning near the southeast Louisiana coast. NEXT ADVISORY ------------- Next complete advisory at 1000 AM CDT. $$ Forecaster Latto
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Tropical Storm Laura Public Advisory Number 14A
2020-08-23 13:44:25| National Hurricane Center (Atlantic)
Issued at 800 AM EDT Sun Aug 23 2020 000 WTNT33 KNHC 231144 TCPAT3 BULLETIN Tropical Storm Laura Intermediate Advisory Number 14A NWS National Hurricane Center Miami FL AL132020 800 AM EDT Sun Aug 23 2020 ...LAURA BRINGING TORRENTIAL RAINFALL AND LIFE-THREATENING FLOODING TO THE DOMINICAN REPUBLIC AND HAITI... SUMMARY OF 800 AM EDT...1200 UTC...INFORMATION ---------------------------------------------- LOCATION...19.1N 72.1W ABOUT 40 MI...65 KM NNE OF PORT AU PRINCE HAITI ABOUT 50 MI...80 KM S OF CAP HAITIEN HAITI MAXIMUM SUSTAINED WINDS...45 MPH...75 KM/H PRESENT MOVEMENT...WNW OR 285 DEGREES AT 18 MPH...30 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 Tropical Storm Warning is in effect for... * The northern coast of the Dominican Republic from Cabo Engano to the border with Haiti * The southern coast of the Dominican Republic from Cabo Engano to Punta Palenque * The northern coast of Haiti from Le Mole St. Nicholas to the border with the Dominican Republic * The southeastern Bahamas and the Turks and Caicos Islands * Cuban provinces of Camaguey, Las Tunas, Holguin, Guantanamo, Santiago de Cuba, Granma, Ciego De Avila, Sancti Spiritus, Villa Clara, Cienfuegos, Matanzas, Mayabeque, La Habana, and Artemisa A Tropical Storm Watch is in effect for... * The central Bahamas * Andros Island * Florida Keys from Ocean Reef to Key West and the Dry Tortugas * Florida Bay * Cuban province of Pinar Del Rio A Tropical Storm Warning for the Dominican Republic and Haiti means that tropical storm conditions are expected somewhere within the warning area today. The Tropical Storm Warning for the Cuban provinces means that tropical storm conditions are expected somewhere within the warning area during the next 24 to 36 hours. A Tropical Storm Watch means that tropical storm conditions are possible within the watch area, generally within 48 hours. 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 of the United States, please monitor products issued by your national meteorological service. DISCUSSION AND OUTLOOK ---------------------- At 800 AM EDT (1200 UTC), the center of Tropical Storm Laura was located near latitude 19.1 North, longitude 72.1 West. Laura is moving toward the west-northwest near 18 mph (30 km/h), and this general motion is expected over the next few days. On the forecast track, the center of Laura will move across Hispaniola this morning, be near or over Cuba tonight and Monday, and over the southeastern Gulf of Mexico Monday night and Tuesday. Maximum sustained winds are near 45 mph (75 km/h) with higher gusts. No significant change in strength is forecast during the next 36 to 48 hours while Laura moves over or near Hispaniola and Cuba. Strengthening is forecast once Laura moves into the Gulf of Mexico Monday night and Tuesday. Tropical-storm-force winds extend outward up to 140 miles (220 km) from the center. The estimated minimum central pressure based on nearby surface observations is 1005 mb (29.68 inches). HAZARDS AFFECTING LAND ---------------------- RAINFALL: Laura is expected to produce the following rainfall accumulations through Tuesday: Dominican Republic, Haiti and Cuba: 4 to 8 inches, with maximum amounts of 12 inches. This heavy rainfall could lead to life-threatening flash and urban flooding, and the potential for mudslides across the Greater Antilles. Rainfall amounts of 1 to 3 inches, with isolated maximum totals of 5 inches, is expected over the Turks and Caicos, southeast Bahamas, and Jamaica. Rainfall amounts of 1 to 3 inches is expected across the Florida Keys. WIND: Tropical storm conditions are expected within portions of the warning area in the Dominican Republic and Haiti through tonight. Tropical storm conditions are expected within portions of the warning area in Cuba later today through Monday. Tropical storm conditions are possible within portions of the watch area tonight through Monday evening. SURF: Swells generated by Laura are affecting portions of the Virgin Islands, Puerto Rico, and Hispaniola. These swells are expected to spread across Cuba, much of the Bahamas, and the Florida Keys during the next few days. Please consult products from your local weather office. NEXT ADVISORY ------------- Next complete advisory at 1100 AM EDT. $$ Forecaster Brown
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Tropical Storm Marco Public Advisory Number 12
2020-08-23 10:56:25| National Hurricane Center (Atlantic)
Issued at 400 AM CDT Sun Aug 23 2020 000 WTNT34 KNHC 230856 TCPAT4 BULLETIN Tropical Storm Marco Advisory Number 12 NWS National Hurricane Center Miami FL AL142020 400 AM CDT Sun Aug 23 2020 ...HURRICANE AND STORM SURGE WARNINGS ISSUED FOR PORTIONS OF THE NORTHERN GULF COAST... SUMMARY OF 400 AM CDT...0900 UTC...INFORMATION ---------------------------------------------- LOCATION...23.7N 87.0W ABOUT 185 MI...295 KM NW OF THE WESTERN TIP OF CUBA ABOUT 395 MI...635 KM SSE OF THE MOUTH OF THE MISSISSIPPI RIVER MAXIMUM SUSTAINED WINDS...70 MPH...110 KM/H PRESENT MOVEMENT...NNW OR 335 DEGREES AT 13 MPH...20 KM/H MINIMUM CENTRAL PRESSURE...994 MB...29.36 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: A Storm Surge Warning has been issued from Morgan City Louisiana to Ocean Springs Mississippi. A Hurricane Warning has been issued for the coast of Louisiana from Morgan City to the Mouth of the Pearl River. A Tropical Storm Warning has been issued for Louisiana for Lake Pontchartrain, Lake Maurepas, and Metropolitan New Orleans The Hurricane Watch from the Mouth of the Pearl River to the Mississippi/Alabama border has been changed to a Tropical Storm Warning. The Tropical Storm Warning has been discontinued for the province of Pinar del Rio Cuba for Marco. 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 Hurricane Warning is in effect for... * Morgan City Louisiana to the Mouth of the Pearl River A Storm Surge Watch is in effect for... * Sabine Pass to Morgan City Louisiana * Ocean Springs to the Alabama/Florida border * Lake Pontchartrain, Lake Maurepas, and Mobile Bay A Hurricane Watch is in effect for... * Intracoastal City Louisiana to west of Morgan City * Lake Pontchartrain, Lake Maurepas, and Metropolitan New Orleans A Tropical Storm Warning is in effect for... * Mouth of the Pearl River to the Mississippi/Alabama border * Lake Pontchartrain, Lake Maurepas, and Metropolitan New Orleans A Tropical Storm Watch is in effect for... * Mississippi/Alabama border to the Alabama/Florida border 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 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 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 Tropical Storm Warning means that tropical storm conditions are expected somewhere within the warning area within 36 hours. A Tropical Storm Watch means that tropical storm conditions are possible within the watch area, generally within 48 hours. 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 of the United States, please monitor products issued by your national meteorological service. DISCUSSION AND OUTLOOK ---------------------- At 400 AM CDT (0900 UTC), the center of Tropical Storm Marco was located near latitude 23.7 North, longitude 87.0 West. Marco is moving toward the north-northwest near 13 mph (20 km/h). Marco is forecast to continue moving north-northwestward across the central Gulf of Mexico today and will approach southeastern Louisiana on Monday. A gradual turn toward the west with a decrease in forward speed is expected after Marco moves inland on Monday and on Tuesday. Maximum sustained winds are near 70 mph (110 km/h) with higher gusts. Some strengthening is anticipated and Marco is forecast to become a hurricane today. Marco is expected to be a hurricane when it approaches the northern Gulf Coast on Monday. Rapid weakening is expected after Marco moves inland. Tropical-storm-force winds extend outward up to 60 miles (95 km) from the center. The estimated minimum central pressure based on data from the Air Force reconnaissance plane is 994 mb (29.36 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... Sabine Pass to Morgan City...2-4 ft Morgan City to Ocean Springs including Lake Borgne...4-6 ft Ocean Springs to the AL/FL Border including Mobile Bay...2-4 ft Lake Pontchartrain and Lake Maurepas...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 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 expected within the hurricane warning watch area by midday Monday, with tropical storm conditions possible by early Monday. Tropical storm conditions are possible within the tropical storm watch area on Monday, and hurricane conditions are possible within the hurricane watch areas late on Monday. RAINFALL: Marco is expected to produce rainfall accumulations of 2 to 4 inches with isolated maximum amounts of 6 inches across the Central U.S. Gulf coast through Tuesday. This rainfall may result in isolated areas of flash and urban flooding along the Central U.S. Gulf Coast. SURF: Swells generated by Marco are likely to affect portions of the northern Gulf Coast later today. These swells are likely to cause life-threatening surf and rip current conditions. Please consult products from your local weather office. TORNADOES: An isolated tornado will be possible early Monday morning near the southeast Louisiana coast. NEXT ADVISORY ------------- Next intermediate advisory at 700 AM CDT. Next complete advisory at 1000 AM CDT. $$ Forecaster Blake
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Tropical Storm Laura Public Advisory Number 13A
2020-08-23 08:19:26| National Hurricane Center (Atlantic)
Issued at 200 AM AST Sun Aug 23 2020 000 WTNT33 KNHC 230618 CCA TCPAT3 BULLETIN Tropical Storm Laura Intermediate Advisory Number 13A...Corrected NWS National Hurricane Center Miami FL AL132020 200 AM AST Sun Aug 23 2020 Corrected location in summary section ...LAURA PRODUCING HEAVY RAINFALL OVER THE DOMINICAN REPUBLIC AND EASTERN HAITI... SUMMARY OF 200 AM AST...0600 UTC...INFORMATION ---------------------------------------------- LOCATION...18.6N 70.1W ABOUT 15 MI...25 KM WNW OF SANTO DOMINGO DOMINICAN REPUBLIC ABOUT 145 MI...230 KM E OF PORT AU PRINCE HAITI MAXIMUM SUSTAINED WINDS...50 MPH...85 KM/H PRESENT MOVEMENT...WNW OR 285 DEGREES AT 16 MPH...26 KM/H MINIMUM CENTRAL PRESSURE...1004 MB...29.65 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: The Tropical Storm Warning has been discontinued for Puerto Rico, Vieques, and Culebra. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Tropical Storm Warning is in effect for... * The northern coast of the Dominican Republic from Cabo Engano to the border with Haiti * The southern coast of the Dominican Republic from Cabo Engano to Punta Palenque * The northern coast of Haiti from Le Mole St. Nicholas to the border with the Dominican Republic * The southeastern Bahamas and the Turks and Caicos Islands * Cuban provinces of Camaguey, Las Tunas, Holguin, Guantanamo, Santiago de Cuba, and Granma A Tropical Storm Watch is in effect for... * The central Bahamas * Andros Island * Florida Keys from Ocean Reef to Key West and the Dry Tortugas * Florida Bay * Cuban provinces of Ciego De Avila, Sancti Spiritus, Villa Clara, Cienfuegos, Matanzas, Mayabeque, La Habana, Artemisa, and Pinar Del Rio It should be noted that the Cuban province of Pinar Del Rio is still under a Tropical Storm Warning for Marco. A Tropical Storm Warning means that tropical storm conditions are expected somewhere within the warning area. A Tropical Storm Watch means that tropical storm conditions are possible within the watch area, generally within 48 hours. 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 of the United States, please monitor products issued by your national meteorological service. DISCUSSION AND OUTLOOK ---------------------- At 200 AM AST (0600 UTC), the center of Tropical Storm Laura was located by surface observations over southern Dominican Republic near latitude 18.6 North, longitude 70.1 West. Laura is moving toward the west-northwest near 16 mph (26 km/h), and this general motion is expected over the next few days. On the forecast track, the center of Laura will move across Hispaniola today, be near or over Cuba Sunday night and Monday, and over the southeastern Gulf of Mexico Monday night and Tuesday. Maximum sustained winds are near 50 mph (85 km/h) with higher gusts. No significant changes in strength are forecast during the next 36 to 48 hours while Laura moves near or over Hispaniola and Cuba. Strengthening is forecast once Laura moves into the Gulf of Mexico Monday night and Tuesday. Tropical-storm-force winds extend outward up to 140 miles (220 km) from the center. The estimated minimum central pressure is 1004 mb (29.65 inches). HAZARDS AFFECTING LAND ---------------------- RAINFALL: Laura is expected to produce the following rainfall accumulations through Tuesday: Dominican Republic and Haiti: 4 to 8 inches, with maximum amounts of 12 inches across southern areas. Cuba: 3 to 6 inches, with isolated amounts of 8 inches. This heavy rainfall could lead to life-threatening flash and urban flooding, and the potential for mudslides across the Greater Antilles. Widespread minor to potentially moderate river flooding is still possible in Puerto Rico today. Rainfall amounts of 1 to 3 inches, with isolated maximum totals of 5 inches, is expected over the Turks and Caicos, southeast Bahamas and Jamaica. WIND: Tropical storm conditions are expected within portions of the warning area through Sunday night. Tropical storm conditions are possible within portions of the watch area on Monday. SURF: Swells generated by Laura are affecting portions of the Virgin Islands, Puerto Rico, and Hispaniola. These swells are expected to spread across Cuba, much of the Bahamas, and the Florida Keys during the next few days. Please consult products from your local weather office. NEXT ADVISORY ------------- Next complete advisory at 500 AM AST. $$ Forecaster Stewart
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Tropical Storm Marco Public Advisory Number 11A
2020-08-23 07:48:56| National Hurricane Center (Atlantic)
Issued at 100 AM CDT Sun Aug 23 2020 000 WTNT34 KNHC 230548 TCPAT4 BULLETIN Tropical Storm Marco Intermediate Advisory Number 11A NWS National Hurricane Center Miami FL AL142020 100 AM CDT Sun Aug 23 2020 ...MARCO FORECAST TO BECOME A HURRICANE LATER TODAY... ...STORM SURGE AND HURRICANE WATCHES IN EFFECT FOR PORTIONS OF THE NORTHERN GULF COAST... SUMMARY OF 100 AM CDT...0600 UTC...INFORMATION ---------------------------------------------- LOCATION...23.1N 86.6W ABOUT 135 MI...220 KM NW OF THE WESTERN TIP OF CUBA ABOUT 440 MI...705 KM SSE OF THE MOUTH OF THE MISSISSIPPI RIVER MAXIMUM SUSTAINED WINDS...70 MPH...110 KM/H PRESENT MOVEMENT...NNW OR 335 DEGREES AT 13 MPH...20 KM/H MINIMUM CENTRAL PRESSURE...994 MB...29.36 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: None. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Storm Surge Watch is in effect for... * Sabine Pass to the Alabama/Florida border * Lake Pontchartrain, Lake Maurepas, Lake Borgne, and Mobile Bay A Hurricane Watch is in effect for... * Intracoastal City Louisiana to the Mississippi/Alabama border * Lake Pontchartrain, Lake Maurepas, and Metropolitan New Orleans A Tropical Storm Warning is in effect for... * Province of Pinar del Rio Cuba A Tropical Storm Watch is in effect for... * Mississippi/Alabama border to the Alabama/Florida border 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. For storm information specific to your area, please monitor products issued by your national meteorological service. DISCUSSION AND OUTLOOK ---------------------- At 100 AM CDT (0600 UTC), the center of Tropical Storm Marco was located near latitude 23.1 North, longitude 86.6 West. Marco is moving toward the north-northwest near 13 mph (20 km/h). Marco is forecast to continue moving north-northwestward across the central Gulf of Mexico today and will approach the northern Gulf Coast on Monday. A gradual turn toward the west with a decrease in forward speed is expected after Marco moves inland on Monday and on Tuesday. Data from an Air Force Reserve Hurricane Hunter aircraft indicate that the maximum sustained winds have increased to near 70 mph (110 km/h) with higher gusts. Some strengthening is anticipated and Marco is forecast to become a hurricane today. Marco is expected to be at or near hurricane strength when it approaches the northern Gulf Coast on Monday. Rapid weakening is expected after Marco moves inland. Tropical-storm-force winds extend outward up to 70 miles (110 km) from the center. The estimated minimum central pressure based on data from the Air Force reconnaissance plane is 994 mb (29.36 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... Grand Isle LA to the AL/FL Border including Lake Borgne and Mobile Bay...3-5 ft Lake Pontchartrain and Lake Maurepas...2-4 ft Sabine Pass to Grand Isle LA...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 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 by midday Monday, with tropical storm conditions possible by early Monday. Tropical storm conditions are possible within the tropical storm watch area on Monday. Tropical storm conditions are expected to continue within the warning area in Cuba through the next few hours. RAINFALL: Marco is expected to produce the following rainfall accumulations through Tuesday: Far western Cuba: 2 to 4 inches of rain, with isolated maximum amounts of 6 inches possible Central U.S. Gulf Coast: 1 to 3 inches, isolated maximum amounts of 5 inches. This rainfall may result in areas of flash and urban flooding along the Central U.S. Gulf Coast. NEXT ADVISORY ------------- Next complete advisory at 400 AM CDT. $$ Forecaster Blake
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