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Tropical Depression Grace Intermediate Advisory Number 14A
NWS National Hurricane Center Miami FL AL072021
800 PM EDT Mon Aug 16 2021
...GRACE CONTINUES TO PRODUCE VERY HEAVY RAINFALL OVER PORTIONS OF
HAITI AND THE DOMINICAN REPUBLIC.
...THREAT OF FLOODING AND MUDSLIDES WILL CONTINUE THROUGH
SUMMARY OF 800 PM EDT...0000 UTC...INFORMATION
ABOUT 60 MI...95 KM SW OF PORT AU PRINCE HAITI
ABOUT 325 MI...525 KM E OF MONTEGO BAY JAMAICA
MAXIMUM SUSTAINED WINDS...35 MPH...55 KM/H
PRESENT MOVEMENT...WNW OR 285 DEGREES AT 13 MPH...20 KM/H
MINIMUM CENTRAL PRESSURE...1007 MB...29.74 INCHES
WATCHES AND WARNINGS
CHANGES WITH THIS ADVISORY:
SUMMARY OF WATCHES AND WARNINGS IN EFFECT:
A Tropical Storm Warning is in effect for...
* Southern coast of the Cuban provinces of Santiago de Cuba, Granma,
Las Tunas, and Camaguey
* Cayman Islands
A Tropical Storm Watch is in effect for...
* Entire coast of Haiti
* Southern coast of the Cuban provinces of Ciego de Avila, Sancti
Spiritus, Cienfuegos, and Matanzas, as well as Isla de la Juventud.
A Tropical Storm Warning means that tropical storm conditions are
expected somewhere within the warning area within 36 hours.
A Tropical Storm Watch means that tropical storm conditions are
possible within the watch area, generally within 48 hours.
Interests elsewhere in Cuba and the Yucatan Peninsula of Mexico
should monitor the progress of Grace. Additional watches or
warnings are possible tonight or on Tuesday.
For storm information specific to your area, please monitor
products issued by your national meteorological service.
DISCUSSION AND OUTLOOK
At 800 PM EDT (0000 UTC), the center of Tropical Depression Grace
was located near latitude 18.0 North, longitude 73.0 West. Grace is
moving toward the west-northwest near 13 mph (20 km/h). A west to
west-northwest motion is expected during the next few days. On the
forecast track, the center of Grace will continue to move near or
over the Tiburon Peninsula of Haiti tonight. It will then move
between Jamaica and southeastern Cuba on Tuesday, near the Cayman
Islands Tuesday night, and approach the Yucatan Peninsula of Mexico
Wednesday and Wednesday night.
Maximum sustained winds are near 35 mph (55 km/h) with higher
gusts. Strengthening is forecast during the next few days, and Grace
is expected to regain tropical storm status on Tuesday. Grace could
be near hurricane strength when it approaches the Yucatan Peninsula
of Mexico Wednesday night.
The estimated minimum central pressure is 1007 mb (29.74 inches).
HAZARDS AFFECTING LAND
Key messages for Grace can be found in the Tropical Cyclone
Discussion under AWIPS header MIATCDAT2, WMO header WTNT42 KNHC
and on the web at
WIND: Tropical storm conditions are possible in Haiti through
tonight, and in Jamaica on Tuesday. Tropical storm conditions are
expected along the southern coast of Cuba within the warning area on
Tuesday, and over the Cayman Islands beginning late Tuesday into
early Wednesday. Tropical storm conditions are possible along the
southern coast of Cuba within the watch area Tuesday night and
RAINFALL: Grace is expected to produce the following rainfall
Over Haiti and the Dominican Republic...5 to 10 inches of rain with
isolated maximum totals of 15 inches are expected across the
southern terrain areas through Tuesday. This heavy rainfall may lead
to flash and urban flooding, and possible mudslides.
Over far southern Cuba, Jamaica, and the Cayman Islands....2 to 4
inches of rain with isolated maximum totals of 6 inches are expected
through Thursday. This heavy rainfall may lead to flash and urban
SURF: Swells generated by Grace will continue to affect portions of
Hispaniola over the next day or so, and will spread westward to
Jamaica, the Cayman Islands, the southern coast of Cuba, and the
Yucatan Peninsula of Mexico. These swells are likely to cause
life-threatening surf and rip current conditions. Please consult
products from your local weather office.
Next complete advisory at 1100 PM EDT.