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BULLETIN
Tropical Storm Helene Advisory Number   9
NWS National Hurricane Center Miami FL       AL082018
1100 AM AST Sun Sep 09 2018

...HELENE EXPECTED TO BECOME A HURRICANE SOON...


SUMMARY OF 1100 AM AST...1500 UTC...INFORMATION
-----------------------------------------------
LOCATION...13.2N 25.0W
ABOUT 120 MI...190 KM SSW OF THE SOUTHERNMOST CABO VERDE ISLANDS
MAXIMUM SUSTAINED WINDS...65 MPH...100 KM/H
PRESENT MOVEMENT...W OR 270 DEGREES AT 13 MPH...20 KM/H
MINIMUM CENTRAL PRESSURE...997 MB...29.44 INCHES


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

None.

SUMMARY OF WATCHES AND WARNINGS IN EFFECT:

A Hurricane Watch is in effect for...
* The Cabo Verde islands of Santiago, Fogo, and Brava

A Tropical Storm Warning is in effect for...
* The Cabo Verde islands of Santiago, Fogo, and Brava

A Hurricane Watch means that hurricane conditions are possible
within the watch area.

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

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


DISCUSSION AND OUTLOOK
----------------------
At 1100 AM AST (1500 UTC), the center of Tropical Storm Helene was
located near latitude 13.2 North, longitude 25.0 West.  Helene is
moving toward the west near 13 mph (20 km/h), and this motion is
expected to continue through today.  A turn toward the
west-northwest is forecast to occur by Monday.

Maximum sustained winds are near 65 mph (100 km/h) with higher
gusts.  Strengthening is forecast during the next 48 hours, and
Helene is expected to become a hurricane later today.

Tropical-storm-force winds extend outward up to 80 miles (130 km)
from the center.

The estimated minimum central pressure is 997 mb (29.44 inches).


HAZARDS AFFECTING LAND
----------------------
WIND:  Tropical storm conditions are expected within portions
of the warning area today.  Hurricane conditions are also possible
in the southernmost Cabo Verde Islands today.

RAINFALL:  Helene is expected to produce total rain accumulations of
2 to 4 inches over the southern Cabo Verde Islands through today,
with isolated maximum amounts of 6 inches.  This rainfall may
produce life-threatening flash floods.


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

$$
Forecaster Pasch

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