Skip Navigation Links
NOAA NOAA United States Department of Commerce

Parts of the U.S. Government are closed. However, because the information this site provides is necessary to protect life and property, it will be updated and maintained during the Federal Government shutdown. For critical weather information, please visit www.weather.gov. To learn more, see www.commerce.gov.

Tropical Storm HELENE


ZCZC MIATCPAT3 ALL
TTAA00 KNHC DDHHMM

BULLETIN
Tropical Storm Helene Advisory Number  30
NWS National Hurricane Center Miami FL       AL082018
500 PM AST Fri Sep 14 2018

...HELENE EXPECTED TO TURN TOWARD THE AZORES SATURDAY...
...EXPECTED TO BRING GUSTY WINDS AND HEAVY RAINS TO THE AZORES THIS
WEEKEND...


SUMMARY OF 500 PM AST...2100 UTC...INFORMATION
----------------------------------------------
LOCATION...34.1N 36.8W
ABOUT 630 MI...1010 KM WSW OF LAJES AIR BASE IN THE AZORES
MAXIMUM SUSTAINED WINDS...70 MPH...110 KM/H
PRESENT MOVEMENT...N OR 10 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 24
to 36 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 500 PM AST (2100 UTC), the center of Tropical Storm Helene was
located near latitude 34.1 North, longitude 36.8 West. Helene is
moving toward the north near 18 mph (30 km/h), A turn toward the
north-northeast is forecast early Saturday followed by a turn toward
the northeast by Sunday morning.  On the forecast track, Helene will
pass near or over the Azores late Saturday or Sunday.

Maximum sustained winds are near 70 mph (110 km/h) with higher
gusts.  Little change in strength is forecast during the next 12
hours.  Afterward, gradual weakening is expected over the weekend
as Helene makes 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)
from 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 800 PM AST.
Next complete advisory at 1100 PM AST.

$$
Forecaster Roberts

NNNN