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Summary for Post-Tropical Cyclone Marco (AT4/AL142020)

2020-08-25 10:39:29| National Hurricane Center (Atlantic)

...MARCO BECOMES A REMNANT LOW JUST SOUTH OF LOUISIANA... ...THIS IS THE LAST ADVISORY... As of 4:00 AM CDT Tue Aug 25 the center of Marco was located near 28.8, -91.2 with movement W at 10 mph. The minimum central pressure was 1008 mb with maximum sustained winds of about 30 mph.

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Post-Tropical Cyclone Marco Public Advisory Number 21

2020-08-25 10:39:29| National Hurricane Center (Atlantic)

Issued at 400 AM CDT Tue Aug 25 2020 401 WTNT34 KNHC 250839 TCPAT4 BULLETIN Post-Tropical Cyclone Marco Advisory Number 21 NWS National Hurricane Center Miami FL AL142020 400 AM CDT Tue Aug 25 2020 ...MARCO BECOMES A REMNANT LOW JUST SOUTH OF LOUISIANA... ...THIS IS THE LAST ADVISORY... SUMMARY OF 400 AM CDT...0900 UTC...INFORMATION ---------------------------------------------- LOCATION...28.8N 91.2W ABOUT 60 MI...100 KM S OF MORGAN CITY LOUISIANA ABOUT 110 MI...175 KM SSE OF LAFAYETTE LOUISIANA MAXIMUM SUSTAINED WINDS...30 MPH...45 KM/H PRESENT MOVEMENT...W OR 270 DEGREES AT 10 MPH...17 KM/H MINIMUM CENTRAL PRESSURE...1008 MB...29.77 INCHES WATCHES AND WARNINGS -------------------- There are no coastal watches or warnings in effect. DISCUSSION AND OUTLOOK ---------------------- At 400 AM CDT (0900 UTC), the center of Post-Tropical Cyclone Marco was located near latitude 28.8 North, longitude 91.2 West. The post-tropical cyclone is moving toward the west near 10 mph (17 km/h), and this general motion is expected to continue for the next day or so. On the forecast track, Marco should continue moving westward just offshore the coast of Louisiana until the system dissipates. Maximum sustained winds are near 30 mph (45 km/h) with higher gusts. Additional weakening is expected, and Post-Tropical Cyclone Marco is forecast to dissipate by early Wednesday, if not sooner. The estimated minimum central pressure is 1008 mb (29.77 inches). HAZARDS AFFECTING LAND ---------------------- SURF: Swells and rip currents affecting the north-central Gulf coast will gradually subside today. Please consult products from your local weather service office. NEXT ADVISORY ------------- This is the last public advisory issued by the National Hurricane Center on Marco. Additional information on this system can be found in High Seas Forecasts issued by the National Weather Service, under AWIPS header NFDHSFAT1, WMO header FZNT01 KWBC, and online at ocean.weather.gov/shtml/NFDHSFAT1.php $$ Forecaster Stewart

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Post-Tropical Cyclone Marco Forecast Advisory Number 21

2020-08-25 10:39:29| National Hurricane Center (Atlantic)

Issued at 0900 UTC TUE AUG 25 2020 400 WTNT24 KNHC 250839 TCMAT4 POST-TROPICAL CYCLONE MARCO FORECAST/ADVISORY NUMBER 21 NWS NATIONAL HURRICANE CENTER MIAMI FL AL142020 0900 UTC TUE AUG 25 2020 THERE ARE NO COASTAL WATCHES OR WARNINGS IN EFFECT. POST-TROPICAL CYCLONE CENTER LOCATED NEAR 28.8N 91.2W AT 25/0900Z POSITION ACCURATE WITHIN 30 NM PRESENT MOVEMENT TOWARD THE WEST OR 270 DEGREES AT 9 KT ESTIMATED MINIMUM CENTRAL PRESSURE 1008 MB MAX SUSTAINED WINDS 25 KT WITH GUSTS TO 35 KT. 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 28.8N 91.2W AT 25/0900Z AT 25/0600Z CENTER WAS LOCATED NEAR 28.8N 90.7W FORECAST VALID 25/1800Z 28.8N 92.7W...POST-TROP/REMNT LOW MAX WIND 20 KT...GUSTS 30 KT. FORECAST VALID 26/0600Z...DISSIPATED REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 28.8N 91.2W THIS IS THE LAST FORECAST/ADVISORY ISSUED BY THE NATIONAL HURRICANE CENTER ON THIS MARCO. ADDITIONAL INFORMATION ON THIS SYSTEM CAN BE FOUND IN HIGH SEAS FORECASTS ISSUED BY THE NATIONAL WEATHER SERVICE...UNDER AWIPS HEADER NFDHSFAT1 AND WMO HEADER FZNT01 KWBC. $$ FORECASTER STEWART

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Post-Tropical Cyclone Marco Wind Speed Probabilities Number 21

2020-08-25 10:39:29| National Hurricane Center (Atlantic)

Issued at 0900 UTC TUE AUG 25 2020 383 FONT14 KNHC 250839 PWSAT4 POST-TROPICAL CYCLONE MARCO WIND SPEED PROBABILITIES NUMBER 21 NWS NATIONAL HURRICANE CENTER MIAMI FL AL142020 0900 UTC TUE AUG 25 2020 AT 0900Z THE CENTER OF POST-TROPICAL CYCLONE MARCO WAS LOCATED NEAR LATITUDE 28.8 NORTH...LONGITUDE 91.2 WEST WITH MAXIMUM SUSTAINED WINDS NEAR 25 KTS...30 MPH...45 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 06Z TUE 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 06Z TUE 18Z TUE 06Z WED 18Z WED 06Z THU 06Z FRI 06Z SAT PERIODS TO TO TO TO TO TO TO 18Z TUE 06Z WED 18Z WED 06Z THU 06Z FRI 06Z SAT 06Z SUN FORECAST HOUR (12) (24) (36) (48) (72) (96) (120) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - LOCATION KT $$ FORECASTER STEWART

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