Tropical Storm Marco Tropical Cyclone Update
NWS National Hurricane Center Miami FL AL142020
600 PM CDT Mon Aug 24 2020
...MARCO MAKES LANDFALL NEAR THE MOUTH OF THE MISSISSIPPI...
...EXPECTED TO BECOME A TROPICAL DEPRESSION LATER TONIGHT...
Visible satellite imagery and surface observations indicate that
Marco made landfall near the mouth of the Mississippi River around
600 PM CDT. Data from an Air Force Reserve Hurricane Hunter Aircraft
indicate that Marco is producing a small area of
tropical-storm-force winds over water to the northeast of the
center. These winds will likely subside during the next few hours as
Marco moves along the coast of Louisiana. Heavy rain will continue
along portions of the north-central Gulf Coast through tonight.
The estimated minimum pressure at the time of landfall was 1006 mb
(29.71 inches).
SUMMARY OF 600 PM CDT...2300 UTC...INFORMATION
----------------------------------------------
LOCATION...29.0N 89.2W
ABOUT 0 MI...0 KM N OF THE MOUTH OF THE MISSISSIPPI RIVER
MAXIMUM SUSTAINED WINDS...40 MPH...65 KM/H
PRESENT MOVEMENT...WNW OR 290 DEGREES AT 8 MPH...13 KM/H
MINIMUM CENTRAL PRESSURE...1006 MB...29.71 INCHES
$$
Forecaster Zelinsky
NNNN
03Z已減弱為TD
000
WTNT44 KNHC 250231
TCDAT4
Tropical Depression Marco Discussion Number 20
NWS National Hurricane Center Miami FL AL142020
1000 PM CDT Mon Aug 24 2020
Visible imagery and surface observations indicated that Marco made
landfall around 6 pm CDT near the mouth of the Mississippi River.
Shortly before landfall, reports from an Air Force Reserve Hurricane
Hunter plane indicated that Marco was still producing a small area
of tropical-storm-force winds over water to the northeast of its
center. Since then, the system has moved almost due west along the
southeast coast of Louisiana while its deep convection has become
farther displaced from the low-level center. Between the lack of
central convection and Marco's proximity to land, it is likely that
the winds have decreased since earlier this evening and the
intensity has been lowered to 30 kt.
If deep convection does not redevelop overnight, Marco will become a
remnant low as soon as Tuesday morning. Regardless of its status,
Marco should move generally westward near the coast of Louisiana
while it weakens for the next day or so and could continue to
produce heavy rain for portions of the north-central Gulf Coast
tonight. The system is then forecast to dissipate by early
Wednesday, if not sooner.
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