#3389 Postby eastcoastFL » Mon Sep 04, 2017 9:47 pm
BULLETIN
Hurricane Irma Advisory Number 23
NWS National Hurricane Center Miami FL AL112017
1100 PM AST Mon Sep 04 2017
...HURRICANE WARNINGS ISSUED FOR PUERTO RICO AND THE VIRGIN
ISLANDS...
SUMMARY OF 1100 PM AST...0300 UTC...INFORMATION
-----------------------------------------------
LOCATION...16.7N 55.6W
ABOUT 410 MI...660 KM E OF THE LEEWARD ISLANDS
MAXIMUM SUSTAINED WINDS...140 MPH...220 KM/H
PRESENT MOVEMENT...W OR 270 DEGREES AT 13 MPH...20 KM/H
MINIMUM CENTRAL PRESSURE...943 MB...27.85 INCHES
WATCHES AND WARNINGS
--------------------
CHANGES WITH THIS ADVISORY:
The Hurricane Watch for the U.S. Virgin Islands, Puerto Rico,
Vieques, and Culebra has been changed to a Hurricane Warning.
The government of Antigua has changed the Hurricane Watch for the
British Virgin Islands to a Hurricane Warning.
SUMMARY OF WATCHES AND WARNINGS IN EFFECT:
A Hurricane Warning is in effect for...
* Antigua, Barbuda, Anguilla, Montserrat, St. Kitts, and Nevis
* Saba, St. Eustatius, and Sint Maarten
* Saint Martin and Saint Barthelemy
* British Virgin Islands
* U.S. Virgin Islands
* Puerto Rico, Vieques, and Culebra
A Hurricane Watch is in effect for...
* Guadeloupe
A Tropical Storm Warning is in effect for...
* Guadeloupe
A Tropical Storm Watch is in effect for...
* Dominica
A Hurricane Warning means that hurricane conditions are expected
somewhere within the warning area. A warning is typically issued
36 hours before the anticipated first occurrence of tropical-storm-
force winds, conditions that make outside preparations difficult or
dangerous. Preparations to protect life and property should be
rushed to completion.
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.
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 in the Dominican Republic, Haiti, the Turks and Caicos
Islands, Cuba, and the southeastern and central Bahamas should
monitor the progress of Irma.
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 1100 PM AST (0300 UTC), the eye of Hurricane Irma was located
by an Air Force Hurricane Hunter aircraft near latitude 16.7 North,
longitude 55.6 West. Irma is moving toward the west near 13 mph (20
km/h) and this general motion is expected to continue into Tuesday,
followed by a turn toward the west-northwest late Tuesday. On the
forecast track, the center of Irma will move near or over portions
of the northern Leeward Islands Tuesday night and early Wednesday.
Maximum sustained winds are near 140 mph (220 km/h) with higher
gusts. Irma is a category 4 hurricane on the Saffir-Simpson
Hurricane Wind Scale. Additional strengthening is forecast during
the next 48 hours.
Hurricane-force winds extend outward up to 45 miles (75 km) from the
center and tropical-storm-force winds extend outward up to 140 miles
(220 km).
The minimum central pressure estimated from Hurricane
Hunter observations is 943 mb (27.85 inches).
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