ZCZC MIATCPAT2 ALL
TTAA00 KNHC DDHHMM

BULLETIN
HURRICANE GASTON ADVISORY NUMBER  40
NWS NATIONAL HURRICANE CENTER MIAMI FL       AL072016
1100 AM AST THU SEP 01 2016

...GASTON MOVING QUICKLY EAST-NORTHEASTWARD...
...TROPICAL STORM WARNING ISSUED FOR THE CENTRAL AZORES...


SUMMARY OF 1100 AM AST...1500 UTC...INFORMATION
-----------------------------------------------
LOCATION...37.6N 40.6W
ABOUT 650 MI...1045 KM W OF FAIAL ISLAND IN THE CENTRAL AZORES
ABOUT 735 MI...1185 KM W OF LAJES AIR BASE IN THE AZORES
MAXIMUM SUSTAINED WINDS...85 MPH...140 KM/H
PRESENT MOVEMENT...ENE OR 70 DEGREES AT 24 MPH...39 KM/H
MINIMUM CENTRAL PRESSURE...980 MB...28.94 INCHES


WATCHES AND WARNINGS
--------------------
CHANGES WITH THIS ADVISORY:

The Azores Meteorological Service has issued a Tropical Storm
Warning for the islands of Faial, Pico, Graciosa, Sao Jorge, and
Terceira in the central Azores.

SUMMARY OF WATCHES AND WARNINGS IN EFFECT:

A Tropical Storm Warning is in effect for...
* Flores and Corvo in the western Azores
* Faial, Pico, Graciosa, Sao Jorge, and Terceira in the central
Azores

A Tropical Storm Warning means that tropical storm conditions are
expected somewhere within the warning area, in this case within
24 to 36 hours.

For storm information specific to your area, please monitor
products issued by your national meteorological service.


DISCUSSION AND 48-HOUR OUTLOOK
------------------------------
At 1100 AM AST (1500 UTC), the center of Hurricane Gaston was
located near latitude 37.6 North, longitude 40.6 West.  Gaston is
moving toward the east-northeast near 24 mph (39 km/h), and this
motion is expected to continue for the next couple of days with a
decrease in forward speed expected on Friday.  On the forecast
track, the center of Gaston will move near the western Azores on
Friday and pass north of the central Azores on Friday night.

Maximum sustained winds are near 85 mph (140 km/h) with higher
gusts.  Some weakening is forecast during the next 48 hours, and
Gaston is expected to become a tropical storm by early Friday before
it reaches the western Azores.  Gaston is expected to become a
post-tropical cyclone on Saturday.

Hurricane-force winds extend outward up to 80 miles (130 km), mainly
to the south and east of the center, and tropical-storm-force winds
extend outward up to 185 miles (295 km).

The estimated minimum central pressure is 980 mb (28.94 inches).


HAZARDS AFFECTING LAND
----------------------
WIND:  Tropical storm conditions are expected in the western Azores
on Friday and in the central Azores Friday night.

RAINFALL:  Gaston is expected to produce total rain accumulations
of 1 to 3 inches, primarily over the western Azores, through the
weekend.

SURF:  Swells generated by Gaston will begin affecting the Azores
tonight and continue into Saturday.  These swells are likely to
cause life-threatening surf and rip current conditions.  For more
information, please consult products from your local weather office.


NEXT ADVISORY
-------------
Next intermediate advisory at 200 PM AST.
Next complete advisory at 500 PM AST.

$$
Forecaster Brennan

NNNN