BULLETIN
Tropical Depression Marco Advisory Number 20
NWS National Hurricane Center Miami FL AL142020
1000 PM CDT Mon Aug 24 2020
...MARCO WEAKENS TO A TROPICAL DEPRESSION...
...HEAVY RAIN STILL POSSIBLE TONIGHT ACROSS PORTIONS OF THE CENTRAL
GULF COAST...
SUMMARY OF 1000 PM CDT...0300 UTC...INFORMATION
-----------------------------------------------
LOCATION...29.0N 89.8W
ABOUT 45 MI...70 KM W OF THE MOUTH OF THE MISSISSIPPI RIVER
MAXIMUM SUSTAINED WINDS...35 MPH...55 KM/H
PRESENT MOVEMENT...W OR 270 DEGREES AT 9 MPH...15 KM/H
MINIMUM CENTRAL PRESSURE...1007 MB...29.74 INCHES
WATCHES AND WARNINGS
--------------------
CHANGES WITH THIS ADVISORY:
None.
SUMMARY OF WATCHES AND WARNINGS IN EFFECT:
There are no coastal watches or warnings in effect.
DISCUSSION AND OUTLOOK
----------------------
At 1000 PM CDT (0300 UTC), the center of Tropical Depression Marco
was located near latitude 29.0 North, longitude 89.8 West. The
depression is moving toward the west near 9 mph (15 km/h). Marco is
forecast to continue moving westward near the coast of Louisiana
for the next day or so.
Maximum sustained winds have decreased to near 35 mph (55 km/h) with
higher gusts. Additional weakening is expected, and Marco is
forecast to become a remnant low on Tuesday. The system is then
forecast to dissipate by early Wednesday.
The estimated minimum central pressure is 1007 mb (29.74 inches).
HAZARDS AFFECTING LAND
----------------------
RAINFALL: Marco is expected to produce additional rainfall
accumulations of 1 to 3 inches with additional isolated totals of 5
inches across portions of the north-central Gulf coast and
Southeastern United States through Wednesday. Rain totals related
to Marco near Apalachicola, Florida reached as high as 11.81 inches
on Sunday per a CoCoRaHS report. The additional rainfall may result
in areas of flash, urban and small stream flooding along the same
area.
SURF: Swells generated by Marco are likely to affect portions of
the northern Gulf Coast overnight. These swells are likely to cause
life-threatening surf and rip current conditions. Please consult
products from your local weather office.
TORNADOES: A brief tornado or two remains possible overnight across
the Florida Panhandle, southwest Georgia, far southern Alabama, and
far southern Mississippi.
NEXT ADVISORY
-------------
Next complete advisory at 400 AM CDT.
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