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Tropical Storm Laura Intermediate Advisory Number 8A
NWS National Hurricane Center Miami FL AL132020
800 PM AST Fri Aug 21 2020
...LAURA MOVING ACROSS THE NORTHERN LEEWARD ISLANDS...
SUMMARY OF 800 PM AST...0000 UTC...INFORMATION
ABOUT 250 MI...415 KM ESE OF SAN JUAN PUERTO RICO
MAXIMUM SUSTAINED WINDS...45 MPH...75 KM/H
PRESENT MOVEMENT...W OR 275 DEGREES AT 17 MPH...28 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...
* Puerto Rico, Vieques and Culebra
* U.S. Virgin Islands
* British Virgin Islands
* Saba and St. Eustatius
* St. Maarten
* St. Martin and St. Barthelemy
* Antigua, Barbuda, St. Kitts, Nevis, Anguilla, and Montserrat
* The northern coast of the Dominican Republic from Cabo Engano to
the border with Haiti
* The northern coast of Haiti from Le Mole St. Nicholas to the
border with the Dominican Republic
A Tropical Storm Watch is in effect for...
* The southeastern Bahamas and the Turks and Caicos Islands
A Tropical Storm Warning means that tropical storm conditions are
expected somewhere within the warning area.
A Tropical Storm Watch means that tropical storm conditions are
possible within the watch area, generally within 48 hours.
Interests in Cuba and the remainder of the Bahamas should monitor
the progress of Laura.
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 800 PM AST (0000 UTC), the center of Tropical Storm Laura was
located near latitude 16.8 North, longitude 62.6 West. Laura is
moving toward the west near 17 mph (28 km/h), and a generally
west-northwestward motion at a slightly faster forward speed is
expected over the next few days. On the forecast track, the center
of Laura will move near or over portions of the Leeward Islands
tonight, near or over Puerto Rico Saturday morning, and near the
northern coast of Hispaniola Saturday night and early Sunday.
Maximum sustained winds are near 45 mph (75 km/h) with higher
gusts. Some slow strengthening is forecast during the next few days.
Tropical-storm-force winds extend outward up to 115 miles (185 km)
from the center.
The estimated minimum central pressure is 1007 mb (29.74 inches).
HAZARDS AFFECTING LAND
RAINFALL: Laura is expected to produce 3 to 6 inches of rain over
Puerto Rico and the Virgin Islands, the Dominican Republic, the
southern Haitian Peninsula and eastern Cuba through Sunday. Maximum
amounts up to 8 inches are possible along eastern portions and the
southern slopes of Puerto Rico, as well as over Haiti, the Dominican
Republic and eastern Cuba. This heavy rainfall could lead to flash
and urban flooding, as well as an increased potential for mudslides
with minor river flooding in Puerto Rico.
1 to 3 inches of rain with isolated maximum totals of 5 inches is
expected over the remainder of Haiti, the northern Leeward Islands,
the Turks and Caicos and southeast Bahamas.
WIND: Tropical storm conditions are expected within portions of
the warning area area through Saturday. Tropical storm conditions
are possible within portions of the watch area Saturday night and
SURF: Swells generated by Laura are affecting portions of
the northern Leeward Islands. These swells are expected to spread
across the northern coasts of Puerto Rico, Hispaniola and Cuba,
and much of the Bahamas during the next few days. Please consult
products from your local weather office.
Next complete advisory at 1100 PM AST.