940 
WTNT33 KNHC 160842
TCPAT3

BULLETIN
Tropical Storm Helene Advisory Number  36
NWS National Hurricane Center Miami FL       AL082018
500 AM AST Sun Sep 16 2018

...HELENE QUICKLY TRANSITIONING TO AN EXTRATROPICAL LOW...


SUMMARY OF 500 AM AST...0900 UTC...INFORMATION
----------------------------------------------
LOCATION...42.5N 28.4W
ABOUT 270 MI...435 KM N OF FAIAL ISLAND IN THE CENTRAL AZORES
MAXIMUM SUSTAINED WINDS...50 MPH...85 KM/H
PRESENT MOVEMENT...NE OR 50 DEGREES AT 25 MPH...41 KM/H
MINIMUM CENTRAL PRESSURE...993 MB...29.33 INCHES


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

CHANGES WITH THIS ADVISORY:

None.

SUMMARY OF WATCHES AND WARNINGS IN EFFECT:

None.

Interests in Ireland and the 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 500 AM AST (0900 UTC), the center of Tropical Storm Helene was
located near latitude 42.5 North, longitude 28.4 West.  Helene is
moving toward the northeast near 25 mph (41 km/h), and this motion
is expected to continue with an increase in forward speed during the
next couple of days.  On the forecast track, Helene should move away
from the Azores today and then approach Ireland and the United
Kingdom tonight and Monday.

Maximum sustained winds have decreased to near 50 mph (85 km/h) with
higher gusts.  Little, if any, change in strength is forecast, and
Helene is expected to become an extratropical cyclone today.

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

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


HAZARDS AFFECTING LAND
----------------------
WIND:  Winds should continue to abate in the Azores.
morning.

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


NEXT ADVISORY
-------------
Next complete advisory at 1100 AM AST.

$$
Forecaster Roberts