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BULLETIN
Tropical Storm Helene Advisory Number  31
NWS National Hurricane Center Miami FL       AL082018
1100 PM AST Fri Sep 14 2018

...HELENE EXPECTED TO BRING GUSTY WINDS AND RAINS TO THE AZORES THIS
WEEKEND...


SUMMARY OF 1100 PM AST...0300 UTC...INFORMATION
-----------------------------------------------
LOCATION...35.8N 35.8W
ABOUT 520 MI...840 KM WSW OF LAJES AIR BASE IN THE AZORES
MAXIMUM SUSTAINED WINDS...70 MPH...110 KM/H
PRESENT MOVEMENT...NNE OR 30 DEGREES AT 18 MPH...30 KM/H
MINIMUM CENTRAL PRESSURE...988 MB...29.18 INCHES


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

CHANGES WITH THIS ADVISORY:

None.

SUMMARY OF WATCHES AND WARNINGS IN EFFECT:

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

A Tropical Storm Warning means that tropical storm conditions are
expected somewhere within the warning area, in this case within 12
to 24 hours.

Interests in the Ireland and United Kingdom should consult products
from their local meteorological service for information about
potential impacts from Helene in those locations.  Local forecasts
and warnings for the UK can be found on the website of the UK Met
Office at https://www.metoffice.gov.uk/.  Local forecasts and
warnings for Ireland can be found on the website of Met Eireann at
https://www.met.ie/.


DISCUSSION AND OUTLOOK
----------------------
At 1100 PM AST (0300 UTC), the center of Tropical Storm Helene was
located near latitude 35.8 North, longitude 35.8 West.  Helene is
moving toward the north-northeast near 18 mph (30 km/h).  A turn
toward the northeast is expected by Saturday night or Sunday
morning. On the forecast track, Helene will be passing near or over
the Azores late Saturday or Sunday.

Maximum sustained winds remain near 70 mph (110 km/h) with higher
gusts.  Little change in strength is forecast during the next 12
hours, but gradual weakening is expected over the weekend.  Helene
should make the transition to an extratropical cyclone as it
approaches Ireland and the United Kingdom.

Tropical-storm-force winds extend outward up to 160 miles (260 km)
mainly to the east of the center.

The estimated minimum central pressure is 988 mb (29.18 inches).


HAZARDS AFFECTING LAND
----------------------
WIND:  Tropical storm conditions are expected within the warning
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 200 AM AST.
Next complete advisory at 500 AM AST.

$$
Forecaster Avila

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