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Hurricane Marco Public Advisory Number 14
2020-08-23 22:54:35| National Hurricane Center (Atlantic)
Issued at 400 PM CDT Sun Aug 23 2020 000 WTNT34 KNHC 232054 TCPAT4 BULLETIN Hurricane Marco Advisory Number 14 NWS National Hurricane Center Miami FL AL142020 400 PM CDT Sun Aug 23 2020 ...MARCO EXPECTED TO BRING LIFE-THREATENING STORM SURGE AND HURRICANE-FORCE WINDS ALONG PORTIONS OF THE U.S. GULF COAST MONDAY... SUMMARY OF 400 PM CDT...2100 UTC...INFORMATION ---------------------------------------------- LOCATION...25.8N 87.8W ABOUT 240 MI...390 KM SSE OF THE MOUTH OF THE MISSISSIPPI RIVER ABOUT 395 MI...640 KM SE OF LAFAYETTE LOUISIANA MAXIMUM SUSTAINED WINDS...75 MPH...120 KM/H PRESENT MOVEMENT...NNW OR 340 DEGREES AT 13 MPH...20 KM/H MINIMUM CENTRAL PRESSURE...991 MB...29.27 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: A Tropical Storm Warning has been issued from Cameron to west of Morgan City, Louisiana. 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 Mississippi to the Mississippi/Alabama border * Lake Pontchartrain and Lake Maurepas A Hurricane Watch is in effect for... * Intracoastal City 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 * Cameron to west of Morgan City 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 PM CDT (2100 UTC), the center of Hurricane Marco was located near latitude 25.8 North, longitude 87.8 West. Marco is moving toward the north-northwest near 13 mph (20 km/h), a turn to the northwest is expected later tonight followed by a turn to the west-northwest by Monday night. On the forecast track, Marco will be near the Louisiana coast Monday afternoon, and move near or over the coast through Tuesday. Maximum sustained winds are near 75 mph (120 km/h) with higher gusts. Little change is strength is expected over the next 24 h. Gradual weakening is expected thereafter, and Marco could become a remnant low by Tuesday night. Hurricane-force winds extend outward up to 15 miles (30 km) from the center and tropical-storm-force winds extend outward up to 105 miles (165 km). The estimated minimum central pressure is 991 mb (29.27 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 Mouth of the Mississippi River...4-6 ft Mouth of the Mississippi River to Ocean Springs MS including Lake Borgne...3-5 ft Lake Pontchartrain and Lake Maurepas...2-4 ft Intracoastal City LA to Morgan City LA...2-4 ft Sabine Pass to Intracoastal City...1-3 ft Ocean Springs MS to the AL/FL Border including Mobile Bay...1-3 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: 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 total rainfall accumulations of 3 to 5 inches with isolated maximum amounts of 7 inches across the Central U.S. Gulf coast through Tuesday. This rainfall may result in scattered 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 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: An isolated tornado is possible early Monday morning near the southeast Louisiana coast. Isolated tornadoes are possible across southeast Louisiana, southern Mississippi, southern Alabama, and the Florida Panhandle Monday and Monday night. NEXT ADVISORY ------------- Next intermediate advisory at 700 PM CDT. Next complete advisory at 1000 PM CDT. $$ Forecaster Latto
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Hurricane Marco Wind Speed Probabilities Number 14
2020-08-23 22:54:35| National Hurricane Center (Atlantic)
Issued at 2100 UTC SUN AUG 23 2020 000 FONT14 KNHC 232054 PWSAT4 HURRICANE MARCO WIND SPEED PROBABILITIES NUMBER 14 NWS NATIONAL HURRICANE CENTER MIAMI FL AL142020 2100 UTC SUN AUG 23 2020 AT 2100Z THE CENTER OF HURRICANE MARCO WAS LOCATED NEAR LATITUDE 25.8 NORTH...LONGITUDE 87.8 WEST WITH MAXIMUM SUSTAINED WINDS NEAR 65 KTS...75 MPH...120 KM/H. Z INDICATES COORDINATED UNIVERSAL TIME (GREENWICH) ATLANTIC STANDARD TIME (AST)...SUBTRACT 4 HOURS FROM Z TIME EASTERN DAYLIGHT TIME (EDT)...SUBTRACT 4 HOURS FROM Z TIME CENTRAL DAYLIGHT TIME (CDT)...SUBTRACT 5 HOURS FROM Z TIME WIND SPEED PROBABILITY TABLE FOR SPECIFIC LOCATIONS CHANCES OF SUSTAINED (1-MINUTE AVERAGE) WIND SPEEDS OF AT LEAST ...34 KT (39 MPH... 63 KM/H)... ...50 KT (58 MPH... 93 KM/H)... ...64 KT (74 MPH...119 KM/H)... FOR LOCATIONS AND TIME PERIODS DURING THE NEXT 5 DAYS PROBABILITIES FOR LOCATIONS ARE GIVEN AS OP(CP) WHERE OP IS THE PROBABILITY OF THE EVENT BEGINNING DURING AN INDIVIDUAL TIME PERIOD (ONSET PROBABILITY) (CP) IS THE PROBABILITY OF THE EVENT OCCURRING BETWEEN 18Z SUN AND THE FORECAST HOUR (CUMULATIVE PROBABILITY) PROBABILITIES ARE GIVEN IN PERCENT X INDICATES PROBABILITIES LESS THAN 1 PERCENT PROBABILITIES FOR 34 KT AND 50 KT ARE SHOWN AT A GIVEN LOCATION WHEN THE 5-DAY CUMULATIVE PROBABILITY IS AT LEAST 3 PERCENT. PROBABILITIES FOR 34...50...64 KT SHOWN WHEN THE 5-DAY 64-KT CUMULATIVE PROBABILITY IS AT LEAST 1 PERCENT. - - - - WIND SPEED PROBABILITIES FOR SELECTED LOCATIONS - - - - FROM FROM FROM FROM FROM FROM FROM TIME 18Z SUN 06Z MON 18Z MON 06Z TUE 18Z TUE 18Z WED 18Z THU PERIODS TO TO TO TO TO TO TO 06Z MON 18Z MON 06Z TUE 18Z TUE 18Z WED 18Z THU 18Z FRI FORECAST HOUR (12) (24) (36) (48) (72) (96) (120) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - LOCATION KT APALACHICOLA 34 2 3( 5) X( 5) X( 5) X( 5) X( 5) X( 5) GFMX 290N 850W 34 2 3( 5) X( 5) X( 5) X( 5) X( 5) X( 5) PANAMA CITY FL 34 2 3( 5) X( 5) 1( 6) X( 6) X( 6) X( 6) DESTIN EXEC AP 34 1 2( 3) 1( 4) X( 4) X( 4) X( 4) X( 4) WHITING FLD FL 34 1 2( 3) 1( 4) X( 4) X( 4) X( 4) X( 4) PENSACOLA FL 34 1 3( 4) 1( 5) X( 5) X( 5) X( 5) X( 5) GFMX 290N 870W 34 4 9(13) 1(14) X(14) X(14) X(14) X(14) MOBILE AL 34 1 4( 5) 5(10) X(10) X(10) X(10) X(10) GULFPORT MS 34 1 10(11) 13(24) X(24) 1(25) X(25) X(25) STENNIS MS 34 1 14(15) 18(33) 1(34) 1(35) X(35) X(35) STENNIS MS 50 X 1( 1) 2( 3) 1( 4) X( 4) X( 4) X( 4) BURAS LA 34 1 55(56) 13(69) 1(70) X(70) X(70) X(70) BURAS LA 50 X 10(10) 6(16) X(16) X(16) X(16) X(16) BURAS LA 64 X 1( 1) 2( 3) X( 3) X( 3) X( 3) X( 3) GFMX 280N 890W 34 67 31(98) X(98) X(98) X(98) X(98) X(98) GFMX 280N 890W 50 6 65(71) X(71) X(71) X(71) X(71) X(71) GFMX 280N 890W 64 1 26(27) 1(28) X(28) X(28) X(28) X(28) JACKSON MS 34 X 2( 2) 2( 4) X( 4) 1( 5) X( 5) X( 5) NEW ORLEANS LA 34 1 19(20) 32(52) 1(53) 1(54) X(54) X(54) NEW ORLEANS LA 50 X 1( 1) 10(11) X(11) X(11) X(11) X(11) NEW ORLEANS LA 64 X X( X) 2( 2) X( 2) X( 2) X( 2) X( 2) GFMX 280N 910W 34 2 28(30) 12(42) 1(43) X(43) X(43) X(43) GFMX 280N 910W 50 X 4( 4) 4( 8) 1( 9) X( 9) X( 9) X( 9) GFMX 280N 910W 64 X 1( 1) 1( 2) X( 2) X( 2) X( 2) X( 2) BATON ROUGE LA 34 X 5( 5) 30(35) 6(41) 1(42) X(42) X(42) BATON ROUGE LA 50 X X( X) 5( 5) 1( 6) X( 6) X( 6) X( 6) MORGAN CITY LA 34 X 9( 9) 45(54) 5(59) X(59) X(59) X(59) MORGAN CITY LA 50 X 1( 1) 15(16) 1(17) X(17) X(17) X(17) MORGAN CITY LA 64 X X( X) 3( 3) X( 3) X( 3) X( 3) X( 3) ALEXANDRIA LA 34 X 1( 1) 7( 8) 6(14) 2(16) X(16) X(16) LAFAYETTE LA 34 X 2( 2) 29(31) 10(41) 2(43) X(43) X(43) LAFAYETTE LA 50 X X( X) 5( 5) 3( 8) 1( 9) X( 9) X( 9) LAFAYETTE LA 64 X X( X) 1( 1) 1( 2) X( 2) X( 2) X( 2) NEW IBERIA LA 34 X 3( 3) 35(38) 8(46) 1(47) X(47) X(47) NEW IBERIA LA 50 X X( X) 6( 6) 2( 8) 1( 9) X( 9) X( 9) NEW IBERIA LA 64 X X( X) 1( 1) 1( 2) X( 2) X( 2) X( 2) GFMX 280N 930W 34 1 3( 4) 5( 9) 6(15) 2(17) X(17) X(17) SHREVEPORT LA 34 X X( X) 1( 1) 2( 3) 1( 4) X( 4) X( 4) FORT POLK LA 34 X 1( 1) 5( 6) 11(17) 4(21) X(21) X(21) LAKE CHARLES 34 X 1( 1) 9(10) 19(29) 4(33) X(33) X(33) LAKE CHARLES 50 X X( X) 1( 1) 4( 5) X( 5) X( 5) X( 5) CAMERON LA 34 1 3( 4) 12(16) 20(36) 5(41) X(41) X(41) CAMERON LA 50 X X( X) 2( 2) 5( 7) 2( 9) X( 9) X( 9) CAMERON LA 64 X X( X) X( X) 1( 1) 1( 2) X( 2) X( 2) JASPER TX 34 X 1( 1) 2( 3) 11(14) 6(20) X(20) X(20) KOUNTZE TX 34 X 1( 1) 2( 3) 10(13) 9(22) X(22) X(22) KOUNTZE TX 50 X X( X) X( X) 2( 2) 1( 3) X( 3) X( 3) PORT ARTHUR TX 34 X 1( 1) 3( 4) 13(17) 7(24) X(24) X(24) PORT ARTHUR TX 50 X X( X) X( X) 2( 2) 2( 4) X( 4) X( 4) GALVESTON TX 34 X 2( 2) 2( 4) 8(12) 9(21) X(21) X(21) GALVESTON TX 50 X X( X) X( X) 2( 2) 3( 5) X( 5) X( 5) HOUSTON TX 34 X X( X) 1( 1) 4( 5) 10(15) X(15) X(15) AUSTIN TX 34 X X( X) X( X) 1( 1) 5( 6) X( 6) X( 6) SAN ANTONIO TX 34 X X( X) X( X) X( X) 3( 3) X( 3) X( 3) FREEPORT TX 34 X X( X) 1( 1) 2( 3) 8(11) X(11) X(11) GFMX 280N 950W 34 X 1( 1) 2( 3) 2( 5) 6(11) X(11) X(11) HIGH ISLAND TX 34 X 1( 1) 2( 3) 8(11) 8(19) X(19) X(19) MATAGORDA TX 34 X X( X) 2( 2) 2( 4) 6(10) X(10) X(10) PORT O CONNOR 34 X X( X) 1( 1) 2( 3) 5( 8) X( 8) X( 8) ROCKPORT TX 34 X X( X) X( X) X( X) 3( 3) X( 3) X( 3) CORPUS CHRISTI 34 X X( X) X( X) X( X) 3( 3) X( 3) X( 3) GFMX 270N 960W 34 X X( X) 1( 1) 1( 2) 2( 4) X( 4) X( 4) PENSACOLA NAS 34 2 8(10) 1(11) X(11) 1(12) X(12) X(12) KEESLER AB 34 2 22(24) 7(31) X(31) X(31) X(31) X(31) KEESLER AB 50 X 1( 1) 1( 2) X( 2) 1( 3) X( 3) X( 3) $$ FORECASTER LATTO
Hurricane Marco Forecast Advisory Number 14
2020-08-23 22:54:02| National Hurricane Center (Atlantic)
Issued at 2100 UTC SUN AUG 23 2020 111 WTNT24 KNHC 232053 TCMAT4 HURRICANE MARCO FORECAST/ADVISORY NUMBER 14 NWS NATIONAL HURRICANE CENTER MIAMI FL AL142020 2100 UTC SUN AUG 23 2020 CHANGES IN WATCHES AND WARNINGS WITH THIS ADVISORY... A TROPICAL STORM WARNING HAS BEEN ISSUED FROM CAMERON TO WEST OF MORGAN CITY...LOUISIANA. 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 MISSISSIPPI TO THE MISSISSIPPI/ALABAMA BORDER * LAKE PONTCHARTRAIN AND LAKE MAUREPAS A HURRICANE WATCH IS IN EFFECT FOR... * INTRACOASTAL CITY 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 * CAMERON TO WEST OF MORGAN CITY 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. HURRICANE CENTER LOCATED NEAR 25.8N 87.8W AT 23/2100Z POSITION ACCURATE WITHIN 30 NM PRESENT MOVEMENT TOWARD THE NORTH-NORTHWEST OR 340 DEGREES AT 11 KT ESTIMATED MINIMUM CENTRAL PRESSURE 991 MB MAX SUSTAINED WINDS 65 KT WITH GUSTS TO 80 KT. 64 KT....... 15NE 15SE 0SW 0NW. 50 KT....... 30NE 30SE 0SW 20NW. 34 KT....... 90NE 70SE 30SW 60NW. 12 FT SEAS.. 90NE 75SE 75SW 75NW. WINDS AND SEAS VARY GREATLY IN EACH QUADRANT. RADII IN NAUTICAL MILES ARE THE LARGEST RADII EXPECTED ANYWHERE IN THAT QUADRANT. REPEAT...CENTER LOCATED NEAR 25.8N 87.8W AT 23/2100Z AT 23/1800Z CENTER WAS LOCATED NEAR 25.3N 87.6W FORECAST VALID 24/0600Z 27.1N 88.6W MAX WIND 65 KT...GUSTS 80 KT. 64 KT... 15NE 15SE 0SW 0NW. 50 KT... 30NE 30SE 0SW 20NW. 34 KT... 90NE 70SE 30SW 60NW. FORECAST VALID 24/1800Z 28.5N 89.7W MAX WIND 65 KT...GUSTS 80 KT. 64 KT... 15NE 15SE 0SW 0NW. 50 KT... 30NE 30SE 0SW 20NW. 34 KT... 70NE 50SE 30SW 45NW. FORECAST VALID 25/0600Z 29.3N 91.4W...INLAND MAX WIND 50 KT...GUSTS 60 KT. 50 KT... 0NE 15SE 0SW 0NW. 34 KT... 30NE 30SE 10SW 20NW. FORECAST VALID 25/1800Z 29.8N 93.2W...INLAND MAX WIND 35 KT...GUSTS 45 KT. 34 KT... 0NE 20SE 0SW 0NW. FORECAST VALID 26/0600Z 29.9N 95.1W...POST-TROP/INLAND MAX WIND 30 KT...GUSTS 40 KT. FORECAST VALID 26/1800Z 29.7N 96.8W...POST-TROP/INLAND MAX WIND 25 KT...GUSTS 35 KT. EXTENDED OUTLOOK. NOTE...ERRORS FOR TRACK HAVE AVERAGED NEAR 150 NM ON DAY 4 AND 175 NM ON DAY 5...AND FOR INTENSITY NEAR 15 KT EACH DAY OUTLOOK VALID 27/1800Z...DISSIPATED REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 25.8N 87.8W INTERMEDIATE PUBLIC ADVISORY...WTNT34 KNHC/MIATCPAT4...AT 24/0000Z NEXT ADVISORY AT 24/0300Z $$ FORECASTER LATTO
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Hurricane Marco Public Advisory Number 13A
2020-08-23 19:40:40| National Hurricane Center (Atlantic)
Issued at 100 PM CDT Sun Aug 23 2020 000 WTNT34 KNHC 231740 TCPAT4 BULLETIN Hurricane Marco Intermediate Advisory Number 13A NWS National Hurricane Center Miami FL AL142020 100 PM CDT Sun Aug 23 2020 ...HURRICANE MARCO CROSSING THE CENTRAL GULF... ...LIFE-THREATENING STORM SURGE AND HURRICANE-FORCE WINDS EXPECTED ALONG PORTIONS OF THE U.S. GULF COAST MONDAY... SUMMARY OF 100 PM CDT...1800 UTC...INFORMATION ---------------------------------------------- LOCATION...25.3N 87.4W ABOUT 280 MI...450 KM SSE OF THE MOUTH OF THE MISSISSIPPI RIVER ABOUT 440 MI...710 KM SE OF LAFAYETTE LOUISIANA MAXIMUM SUSTAINED WINDS...75 MPH...120 KM/H PRESENT MOVEMENT...NNW OR 340 DEGREES AT 14 MPH...22 KM/H MINIMUM CENTRAL PRESSURE...992 MB...29.29 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 Mississippi to the Mississippi/Alabama border * Lake Pontchartrain and Lake Maurepas 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 100 PM CDT (1800 UTC), the center of Hurricane Marco was located near latitude 25.3 North, longitude 87.4 West. Marco is moving toward the north-northwest near 14 mph (22 km/h), and this motion is expected to continue through tonight, followed by a turn toward the northwest by Monday. On the forecast track, Marco will cross the central Gulf of Mexico today and will approach southeastern Louisiana on Monday. A gradual turn toward the west-northwest with a decrease in forward speed is expected after Marco moves inland. Maximum sustained winds are near 75 mph (120 km/h) with higher gusts. Marco is expected to be a hurricane when it approaches the northern Gulf Coast on Monday. Rapid weakening is expected after Marco moves inland. Hurricane-force winds extend outward up to 20 miles (30 km) from the center and tropical-storm-force winds extend outward up to 100 miles (160 km) from the center. The estimated minimum central pressure is 992 mb (29.29 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...4-6 ft Sabine Pass to Morgan City LA...2-4 ft Ocean Springs MS to the MS/AL Border...2-4 ft Lake Pontchartrain and Lake Maurepas...2-4 ft MS/AL Border to AL/FL Border including Mobile Bay...1-3 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: 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 400 PM CDT. $$ Forecaster Latto
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Summary for Hurricane Marco (AT4/AL142020)
2020-08-23 18:29:32| National Hurricane Center (Atlantic)
...HURRICANE MARCO CROSSING THE CENTRAL GULF... ...LIFE-THREATENING STORM SURGE AND HURRICANE-FORCE WINDS EXPECTED ALONG PORTIONS OF THE U.S. GULF COAST MONDAY... As of 1:00 PM CDT Sun Aug 23 the center of Marco was located near 25.3, -87.4 with movement NNW at 14 mph. The minimum central pressure was 992 mb with maximum sustained winds of about 75 mph.
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