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Tropical Storm Marco Intermediate Advisory Number 7A...CORRECTED
NWS National Hurricane Center Miami FL AL142020
200 AM EDT Sat Aug 22 2020
CORRECTED LATITUDE IN DISCUSSION
...MARCO MOVING NORTH-NORTHWESTWARD TOWARD THE YUCATAN PENINSULA...
SUMMARY OF 200 AM EDT...0600 UTC...INFORMATION
ABOUT 150 MI...240 KM SE OF COZUMEL MEXICO
MAXIMUM SUSTAINED WINDS...40 MPH...65 KM/H
PRESENT MOVEMENT...NNW OR 335 DEGREES AT 13 MPH...20 KM/H
MINIMUM CENTRAL PRESSURE...1005 MB...29.68 INCHES
WATCHES AND WARNINGS
CHANGES WITH THIS ADVISORY:
SUMMARY OF WATCHES AND WARNINGS IN EFFECT:
A Hurricane Watch is in effect for...
* Punta Herrero to Cancun Mexico
A Tropical Storm Warning is in effect for...
* Punta Herrero to Dzilam Mexico
A Hurricane Watch means that hurricane conditions are possible
within the watch area, in this case within 24 hours.
A Tropical Storm Warning means that tropical storm conditions are
expected somewhere within the warning area, in this case within 24
For storm information specific to your area, please monitor
products issued by your national meteorological service.
DISCUSSION AND OUTLOOK
At 200 AM EDT (0600 UTC), the center of Tropical Storm Marco was
located near latitude 19.1 North, longitude 85.2 West. Marco is
moving toward the north-northwest near 13 mph (20 km/h). A slightly
slower northwestward motion is expected for the next day or so,
followed by an increase in forward speed by early next week. On the
forecast track, the center of Marco will approach the east coast of
the Yucatan Peninsula of Mexico today. The center will then cross
the northeastern part of the Yucatan Peninsula tonight and move over
the central Gulf of Mexico toward the northwestern Gulf on Sunday
Maximum sustained winds are near 40 mph (65 km/h) with higher
gusts. Additional strengthening is forecast during the next couple
of days as the system approaches the Yucatan peninsula and Marco
could be near hurricane strength when it moves over the central Gulf
of Mexico on Sunday.
Tropical-storm-force winds extend outward up to 70 miles (110 km)
from the center.
The minimum central pressure estimated by 53rd Air Force Reserve
reconnaissane aircraft observations is 1005 mb (29.68 inches).
HAZARDS AFFECTING LAND
WIND: Tropical storm conditions are expected to first reach the
eastern Yucatan coast within the warning area this afternoon
and will spread northward and westward within the warning area
tonight, making outside preparations difficult or dangerous.
Hurricane conditions are also possible within the hurricane watch
area by this evening.
RAINFALL: Marco is expected to produce the following rainfall
accumulations through Sunday:
Eastern portions of the Mexican states of Quintana Roo and Yucatan:
3 to 6 inches, isolated maximum totals of 10 inches. This rainfall
may result in areas of flash flooding.
Northeast Nicaragua and the Cayman Islands: 1 to 2 inches.
Next complete advisory at 500 AM EDT.