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Tropical Storm Marco Intermediate Advisory Number 9A
NWS National Hurricane Center Miami FL       AL142020
100 PM CDT Sat Aug 22 2020
 
...MARCO'S CENTER MOVING THROUGH THE YUCATAN CHANNEL...
 
 
SUMMARY OF 100 PM CDT...1800 UTC...INFORMATION
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LOCATION...21.4N 85.5W
ABOUT 50 MI...85 KM SW OF THE WESTERN TIP OF CUBA
ABOUT 90 MI...150 ENE OF CANCUN MEXICO
MAXIMUM SUSTAINED WINDS...65 MPH...100 KM/H
PRESENT MOVEMENT...NNW OR 340 DEGREES AT 12 MPH...19 KM/H
MINIMUM CENTRAL PRESSURE...992 MB...29.30 INCHES
 
 
WATCHES AND WARNINGS
--------------------
CHANGES WITH THIS ADVISORY:
 
None.
 
SUMMARY OF WATCHES AND WARNINGS IN EFFECT:
 
A Tropical Storm Warning is in effect for...
* Province of Pinar del Rio Cuba
* Cancun to Dzilam Mexico
 
A Tropical Storm Warning means that tropical storm conditions are
expected somewhere within the warning area, in this case within
the next 6-12 hours.
 
Interests along the coasts of Louisiana and Texas should monitor
the progress of Marco.  Watches will likely be required for a
portion of this area later today.
 
For storm information specific to your area, please monitor
products issued by your national meteorological service.
 
 
DISCUSSION AND OUTLOOK
----------------------
At 100 PM CDT (1800 UTC), the center of Tropical Storm Marco was
located near latitude 21.4 North, longitude 85.5 West.  Marco is
moving toward the north-northwest near 12 mph (19 km/h), and this
general motion is expected to continue through Sunday morning.  A
gradual turn toward the northwest and west-northwest is expected to
begin Sunday afternoon and continue through Tuesday morning.  On the
forecast track, Marco's center will move into the southeastern Gulf
of Mexico by this evening.  Marco will then move across the central
Gulf of Mexico on Sunday and approach the central and northwestern
Gulf coast on Monday and Tuesday.
 
Maximum sustained winds are near 65 mph (100 km/h) with higher
gusts.  Strengthening is forecast during the next day or two, and
Marco is expected to become a hurricane later today or tonight.
Weakening is forecast to occur on Monday and Tuesday.
 
Tropical-storm-force winds extend outward up to 45 miles (75 km)
from the center.
 
The estimated minimum central pressure is 992 mb (29.30 inches).
 
 
HAZARDS AFFECTING LAND
----------------------
WIND:  Tropical storm conditions are expected within the warning
area in Cuba through this afternoon.  Tropical storm conditions are
also still possible today within the warning area along the
northeastern coast of the Yucatan Peninsula of Mexico.
 
RAINFALL:  Marco is expected to produce 1 to 4 inches of rain, with
isolated maximum amounts of 6 inches possible, across the eastern
portions of the Mexican states of Quintana Roo and Yucatan, and
across far western Cuba. This rainfall may result in areas of flash
flooding.
 
 
NEXT ADVISORY
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Next complete advisory at 400 PM CDT.
 
$$
Forecaster Berg
 
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