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BULLETIN
Tropical Storm Helene Advisory Number  26
NWS National Hurricane Center Miami FL       AL082018
500 PM AST Thu Sep 13 2018

...TROPICAL STORM WATCHES ISSUED FOR THE AZORES ISLANDS FOR
HELENE...


SUMMARY OF 500 PM AST...2100 UTC...INFORMATION
----------------------------------------------
LOCATION...26.3N 37.0W
ABOUT 1035 MI...1670 KM SW OF LAJES AIR BASE IN THE AZORES
MAXIMUM SUSTAINED WINDS...65 MPH...100 KM/H
PRESENT MOVEMENT...N OR 5 DEGREES AT 21 MPH...33 KM/H
MINIMUM CENTRAL PRESSURE...993 MB...29.33 INCHES


WATCHES AND WARNINGS
--------------------

CHANGES WITH THIS ADVISORY:

The Government of Portugal has issued a Tropical Storm Watch for
all of the Azores Islands.

SUMMARY OF WATCHES AND WARNINGS IN EFFECT:

A Tropical Storm Watch is in effect for...
* All of the Azores Islands

A Tropical Storm Watch means that tropical storm conditions are
possible within the watch area, generally within 48 hours.


DISCUSSION AND OUTLOOK
----------------------
At 500 PM AST (2100 UTC), the center of Tropical Storm Helene was
located near latitude 26.3 North, longitude 37.0 West. Helene is
moving toward the north near 21 mph (33 km/h).  The system is
expected to accelerate and turn toward the northeast by Monday.  On
this forecast track, Helene will be crossing over or near the
Azores late Saturday or Sunday.

Maximum sustained winds are near 65 mph (100 km/h) with higher
gusts.  Little change in strength is forecast during the next 48
hours.

Tropical-storm-force winds extend outward up to 140 miles (220 km)
from the center.

The estimated minimum central pressure is 993 mb (29.33 inches).


HAZARDS AFFECTING LAND
----------------------
WIND:  Tropical storm conditions are possible within the watch
area by late Saturday.

RAINFALL:  Helene is expected to produce total rainfall amounts of 2
to 4 inches across the Azores, with isolated amounts up to 8 inches
across the western Azores. This rainfall may cause life-threatening
flash flooding.

SURF:  Swells generated by Helene are affecting portions of
the Azores.  These swells are likely to cause life-threatening surf
and rip current conditions.  Please consult products from your local
weather office.


NEXT ADVISORY
-------------
Next intermediate advisory at 800 PM AST.
Next complete advisory at 1100 PM AST.

$$
Forecaster Landsea

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