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BULLETIN
Tropical Storm Helene Advisory Number   7
NWS National Hurricane Center Miami FL       AL082018
1100 PM AST Sat Sep 08 2018

...HELENE EXPECTED TO PRODUCE TROPICAL STORM CONDITIONS FOR
PORTIONS OF THE CABO VERDE ISLANDS SUNDAY...


SUMMARY OF 1100 PM AST...0300 UTC...INFORMATION
-----------------------------------------------
LOCATION...13.2N 22.8W
ABOUT 155 MI...250 KM SE OF THE SOUTHERNMOST CABO VERDE ISLANDS
MAXIMUM SUSTAINED WINDS...60 MPH...95 KM/H
PRESENT MOVEMENT...W OR 260 DEGREES AT 13 MPH...20 KM/H
MINIMUM CENTRAL PRESSURE...999 MB...29.50 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, in this case within the next 12 to 18
hours.

A Tropical Storm Warning means that tropical storm conditions are
expected somewhere within the warning area, in this case within the
next 12 to 18 hours.

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


DISCUSSION AND OUTLOOK
----------------------
At 1100 PM AST (0300 UTC), the center of Tropical Storm Helene was
located near latitude 13.2 North, longitude 22.8 West. Helene is
moving toward the west near 13 mph (20 km/h).  The system is
expected to turn toward the west-northwest by Monday at about the
same rate of forward speed.

Maximum sustained winds are near 60 mph (95 km/h) with higher gusts.
Some strengthening is forecast during the next 48 hours, and Helene
is anticipated to become a hurricane on Sunday.

Tropical-storm-force winds extend outward up to 70 miles (110 km)
from the center.

The estimated minimum central pressure is 999 mb (29.50 inches).


HAZARDS AFFECTING LAND
----------------------
WIND:  Tropical storm conditions are expected to first reach the
warning area during the next several hours.  Hurricane conditions
are possible in the southernmost Cabo Verde Islands on Sunday.

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


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

$$
Forecaster Landsea

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