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BULLETIN
Tropical Storm Helene Intermediate Advisory Number 3A
NWS National Hurricane Center Miami FL       AL082018
200 AM AST Sat Sep 08 2018

...TROPICAL STORM HELENE FORECAST TO STRENGTHEN...
...TROPICAL STORM CONDITIONS EXPECTED TO REACH PORTIONS OF THE CABO
VERDE ISLANDS TONIGHT...


SUMMARY OF 200 AM AST...0600 UTC...INFORMATION
----------------------------------------------
LOCATION...13.7N 18.9W
ABOUT 375 MI...605 KM ESE OF THE SOUTHERNMOST CABO VERDE ISLANDS
MAXIMUM SUSTAINED WINDS...40 MPH...65 KM/H
PRESENT MOVEMENT...W OR 280 DEGREES AT 13 MPH...20 KM/H
MINIMUM CENTRAL PRESSURE...1002 MB...29.59 INCHES


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

None.

SUMMARY OF WATCHES AND WARNINGS IN EFFECT:

A Tropical Storm Warning is in effect for...
* Santiago, Fogo, and Brava

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

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


DISCUSSION AND OUTLOOK
----------------------
At 200 AM AST (0600 UTC) was located near latitude 13.7 North,
longitude 18.9 West. Helene is moving toward the west near 13 mph
(20 km/h), and a westward to west-northwestward motion with a
gradual increase in forward speed is expected during the next 72
hours.  On the forecast track, Helene will pass very close to the
southern Cabo Verde Islands tonight and early Sunday.

Maximum sustained winds are near 40 mph (65 km/h) with higher
gusts. Some strengthening is forecast during the next 2 to 3 days,
and Helene could become a hurricane early next week.

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

The estimated minimum central pressure is 1002 mb (29.59 inches).


HAZARDS AFFECTING LAND
----------------------
WIND:  Tropical storm conditions are expected to first reach the
warning area tonight or early Sunday.

RAINFALL:  Helene is expected to produce total rain accumulations of
3 to 5 inches, with maximum totals of 8 inches across the southern
Cabo Verde Islands.  This rainfall may produce life-threatening
flash floods.


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

$$
Forecaster Zelinsky/Brown

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