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Tropical Storm Maria Intermediate Advisory Number 3A
NWS National Hurricane Center Miami FL AL152017
200 AM AST Sun Sep 17 2017
...MARIA CONTINUES MOVING TOWARD THE LESSER ANTILLES...
SUMMARY OF 200 AM AST...0600 UTC...INFORMATION
ABOUT 500 MI...800 KM ESE OF THE LESSER ANTILLES
MAXIMUM SUSTAINED WINDS...50 MPH...85 KM/H
PRESENT MOVEMENT...W OR 280 DEGREES AT 16 MPH...26 KM/H
MINIMUM CENTRAL PRESSURE...1000 MB...29.53 INCHES
WATCHES AND WARNINGS
CHANGES WITH THIS ADVISORY:
SUMMARY OF WATCHES AND WARNINGS IN EFFECT:
A Hurricane Watch is in effect for...
* Antigua, Barbuda, St. Kitts, Nevis, and Montserrat
* Saba and St. Eustatius
* St. Maarten
A Tropical Storm Watch is in effect for...
* St. Lucia
* St. Vincent and the Grenadines
A Hurricane Watch means that hurricane conditions are possible
within the watch area. A watch is typically issued 48 hours
before the anticipated first occurrence of tropical-storm-force
winds, conditions that make outside preparations difficult or
A Tropical Storm Watch means that tropical storm conditions are
possible within the watch area, generally within 48 hours.
Interests elsewhere in the Lesser Antilles and the British and U. S.
Virgin Islands should monitor the progress of this system.
Additional Tropical Storm or Hurricane Watches and Warnings will
likely be issued today.
For storm information specific to your area, please monitor
products issued by your national meteorological service.
DISCUSSION AND 48-HOUR OUTLOOK
At 200 AM AST (0600 UTC), the center of Tropical Storm Maria was
located near latitude 12.7 North, longitude 54.4 West. Maria is
moving toward the west near 16 mph (26 km/h). A turn toward the
west-northwest and a slower forward speed are expected during next
couple of days. On the forecast track, the center of Maria will be
near the Leeward Islands Monday or Monday night.
Maximum sustained winds are near 50 mph (85 km/h) with higher
gusts. Strengthening is expected during the next 48 hours, and
Maria is forecast to be a hurricane when it approaches the Leeward
Tropical-storm-force winds extend outward up to 45 miles (75 km)
from the center.
The estimated minimum central pressure is 1000 mb (29.53 inches).
HAZARDS AFFECTING LAND
WIND: Hurricane conditions are possible within the hurricane watch
area by Monday night or Tuesday, with tropical storm conditions
possible on Monday. Tropical storm conditions are possible in the
Tropical Storm Watch area on Monday.
STORM SURGE: A dangerous storm surge accompanied by large and
destructive waves will raise water levels by as much as 3 to 5 feet
above normal tide levels within the Hurricane Watch area.
RAINFALL: Maria is expected to produce total rain accumulations of 6
to 12 inches with isolated maximum amounts of 20 inches across the
central and southern Leeward Islands through Tuesday night. Maria
is also expected to produce total rain accumulations of 2 to 4
inches with isolated maximum amounts of 8 inches in the northern
Leeward Islands through Tuesday night. This rainfall could cause
life-threatening flash floods and mudslides.
SURF: Swells generated by Maria are expected to begin affecting the
Lesser Antilles by tonight. 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 500 AM AST.