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Tropical Depression Seven Intermediate Advisory Number 3A
NWS National Hurricane Center Miami FL AL072021
200 AM AST Sat Aug 14 2021
...DEPRESSION EXPECTED TO BECOME A TROPICAL STORM LATER TODAY...
SUMMARY OF 200 AM AST...0600 UTC...INFORMATION
ABOUT 480 MI...770 KM E OF THE LEEWARD ISLANDS
MAXIMUM SUSTAINED WINDS...35 MPH...55 KM/H
PRESENT MOVEMENT...W OR 280 DEGREES AT 21 MPH...33 KM/H
MINIMUM CENTRAL PRESSURE...1010 MB...29.83 INCHES
WATCHES AND WARNINGS
CHANGES WITH THIS ADVISORY:
SUMMARY OF WATCHES AND WARNINGS IN EFFECT:
A Tropical Storm Warning is in effect for...
* Antigua and Barbuda, Anguilla, St. Kitts and Nevis, and Montserrat
* Saba and Sint Eustatius
* Sint Maarten
* St. Martin and St. Barthelemy
A Tropical Storm Watch is in effect for...
* British Virgin Islands
* U.S. Virgin Islands
* Puerto Rico, including Vieques and Culebra
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 the Leeward Islands, as well as the
Dominican Republic, should monitor the progress of this system.
Additional watches and warnings will likely be required for these
areas tonight or on Saturday.
For storm information specific to your area in the United
States, including possible inland watches and warnings, please
monitor products issued by your local National Weather Service
forecast office. For storm information specific to your area
outside of the United States, please monitor products issued by
your national meteorological service.
DISCUSSION AND OUTLOOK
At 200 AM AST (0600 UTC), the center of Tropical Depression Seven
was located near latitude 15.6 North, longitude 54.7 West. The
depression is moving toward the west near 21 mph (33 km/h). A motion
towards the west or west-northwest with a gradual decrease in
forward speed is expected during the next few days. On the forecast
track, the center of the depression is forecast to move over the
Leeward Islands tonight, over the Virgin Islands and Puerto
Rico on Sunday, and then over the Dominican Republic on Monday.
Maximum sustained winds are near 35 mph (55 km/h) with higher
gusts. Some strengthening is forecast during the next couple of
days, and the depression is expected to become a tropical storm
The estimated minimum central pressure is 1010 mb (29.83 inches).
HAZARDS AFFECTING LAND
Key messages for Tropical Depression Seven can be found in
the Tropical Cyclone Discussion under AWIPS header MIATCDAT2 and
WMO header WTNT42 KNHC and on the web at
WIND: Tropical storm conditions are expected within the warning
area over the Leeward Islands by tonight or early Sunday.
Tropical storm conditions are possible over the Virgin Islands and
Puerto Rico beginning on Sunday.
RAINFALL: The system is expected to produce the following rainfall
amounts today into Monday:
Over the northern Leeward Islands and Virgin Islands...3 to 6
inches. This rainfall may produce scattered areas of flash and urban
Over Puerto Rico...3 to 6 inches. Heavy rainfall could lead to
flash, urban, and small stream flooding as well as potential
Next complete advisory at 500 AM AST.