Hurricane Maria Intermediate Advisory Number 15A

NWS National Hurricane Center Miami FL AL152017
800 PM AST Tue Sep 19 2017

…EYE OF CATEGORY 5 HURRICANE MARIA MOVING CLOSER TO ST CROIX IN
THE U.S. VIRGIN ISLANDS…
…PREPARATIONS AGAINST LIFE-THREATENING STORM SURGE AND RAINFALL
FLOODING AND DESTRUCTIVE WINDS SHOULD BE RUSHED TO COMPLETION…

SUMMARY OF 800 PM AST…0000 UTC…INFORMATION
———————————————-
LOCATION…17.0N 64.2W
ABOUT 60 MI…100 KM SE OF ST. CROIX
ABOUT 160 MI…255 KM SE OF SAN JUAN PUERTO RICO
MAXIMUM SUSTAINED WINDS…175 MPH…280 KM/H
PRESENT MOVEMENT…WNW OR 300 DEGREES AT 10 MPH…17 KM/H
MINIMUM CENTRAL PRESSURE…909 MB…26.84 INCHES

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WATCHES AND WARNINGS
——————–
CHANGES WITH THIS ADVISORY:

The Meteorological Service of Antigua has discontinued the
Hurricane Warning for St. Kitts, Nevis, and Montserrat. The
Tropical Storm Warning and Hurricane Watch for Anguilla has also
been discontinued.

SUMMARY OF WATCHES AND WARNINGS IN EFFECT:

A Hurricane Warning is in effect for…
* U.S. Virgin Islands
* British Virgin Islands
* Puerto Rico, Culebra, and Vieques
* Dominican Republic from Cabo Engano to Puerto Plata

A Tropical Storm Warning is in effect for…
* Saba and St. Eustatius
* St. Maarten
* Guadeloupe
* Dominican Republic west of Puerto Plata to the northern border of
the Dominican Republic and Haiti
* Dominican Republic west of Cabo Engano to Punta Palenque

A Hurricane Watch is in effect for…
* Saba and St. Eustatius
* St. Maarten
* St. Martin and St. Barthelemy
* Isla Saona to Cabo Engano
* Turks and Caicos Islands and the Southeastern Bahamas

A Hurricane Warning means that hurricane conditions are expected
somewhere within the warning area. Preparations to protect life and
property should be rushed to completion.

A Tropical Storm Warning means that tropical storm conditions are
expected somewhere within the warning area.

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 dangerous.

Interests elsewhere in Hispaniola and the Bahamas should monitor the
progress of Maria.

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
the United States, please monitor products issued by your national
meteorological service.

DISCUSSION AND 48-HOUR OUTLOOK
——————————
At 800 PM AST (0000 UTC), the eye of Hurricane Maria was located
near latitude 17.0 North, longitude 64.2 West. Maria is moving
toward the west-northwest near 10 mph (17 km/h), and this general
motion is expected to continue through Wednesday night. On the
forecast track, the eye of Maria will move near or over St. Croix
in the U.S. Virgin Islands tonight, cross Puerto Rico on Wednesday,
and then pass just north of the coast of the Dominican Republic
Wednesday night and Thursday.

Reports from an Air Force Reserve Hurricane Hunter aircraft
indicate that maximum sustained winds are near 175 mph (280 km/h)
with higher gusts. Maria is a potentially catastrophic category
5 hurricane on the Saffir-Simpson Hurricane Wind Scale. Some
fluctuations in intensity are likely during the next day or so, but
Maria is forecast to remain an extremely dangerous category 4 or 5
hurricane as it moves near or over the Virgin Islands and Puerto
Rico. Slow weakening is expected after the hurricane emerges over
the Atlantic north of Puerto Rico and the Dominican Republic.

Hurricane-force winds extend outward up to 35 miles (55 km) from
the center and tropical-storm-force winds extend outward up to 140
miles (220 km).

The latest minimum central pressure reported by the Hurricane
Hunter aircraft is 909 mb (26.84 inches).

Source: The Daily Herald https://www.thedailyherald.sx/islands/69528-hurricane-maria-intermediate-advisory-number-15a

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