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Tropical Storm Marco Intermediate Advisory Number 8A
NWS National Hurricane Center Miami FL AL142020
700 AM CDT Sat Aug 22 2020
...HURRICANE HUNTER AIRCRAFT FINDS MARCO CONTINUING TO STRENGTHEN...
SUMMARY OF 700 AM CDT...1200 UTC...INFORMATION
ABOUT 110 MI...180 KM E OF COZUMEL MEXICO
MAXIMUM SUSTAINED WINDS...50 MPH...85 KM/H
PRESENT MOVEMENT...NNW OR 335 DEGREES AT 12 MPH...19 KM/H
MINIMUM CENTRAL PRESSURE...1002 MB...29.59 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 700 AM CDT (1200 UTC), the center of Tropical Storm Marco was
located near latitude 20.2 North, longitude 85.2 West. Marco is
moving toward the north-northwest near 12 mph (19 km/h). A
northwestward motion is expected on Sunday, followed by a turn
toward the northwest and west-northwest early next week. On the
forecast track, the center of Marco will approach the eastern coast
of the Yucatan Peninsula of Mexico today. The center will approach
the northeastern part of the Yucatan Peninsula by early evening and
move over the central Gulf of Mexico toward the northwestern Gulf on
Sunday and Monday followed by a track toward the northwestern Gulf
Data from an Air Force Reserve Hurricane Hunter aircraft indicate
that maximum sustained winds have increased to near 50 mph (85 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 Sunday night and early Monday.
Tropical-storm-force winds extend outward up to 70 miles (110 km)
from the center. Marco's center moved just to the west of NOAA buoy
42056, which recently reported a sustained wind of 38 mph (61 km/h)
and a gust to 45 mph (72 km/h).
The estimated minimum central pressure is 1002 mb (29.59 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. Far western
Cuba: 1 to 3 inches. This rainfall may result in areas of flash
Next complete advisory at 1000 AM CDT.