ZCZC MIATCPAT3 ALL
TTAA00 KNHC DDHHMM
Tropical Storm Helene Intermediate Advisory Number 34A
NWS National Hurricane Center Miami FL AL082018
800 PM AST Sat Sep 15 2018
...HELENE PASSING JUST TO THE NORTH OF FLORES ISLAND IN THE
...WINDS AND RAINS SHOULD DECREASE OVERNIGHT...
SUMMARY OF 800 PM AST...0000 UTC...INFORMATION
ABOUT 65 MI...105 KM NNW OF FLORES ISLAND IN THE WESTERN AZORES
MAXIMUM SUSTAINED WINDS...65 MPH...100 KM/H
PRESENT MOVEMENT...NE OR 45 DEGREES AT 24 MPH...39 KM/H
MINIMUM CENTRAL PRESSURE...989 MB...29.21 INCHES
WATCHES AND WARNINGS
CHANGES WITH THIS ADVISORY:
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 the
next 6 to 12 hours. The Tropical Storm Warning will likely be
discontinued by Sunday morning.
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
DISCUSSION AND OUTLOOK
At 800 PM AST (0000 UTC), the center of Tropical Storm Helene was
located near latitude 40.4 North, longitude 31.4 West. Helene is
moving toward the northeast near 24 mph (39 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 continue
to move past the western Azores overnight and then approach Ireland
and the United Kingdom Sunday night and Monday.
Maximum sustained winds are near 65 mph (100 km/h) with higher
gusts. Little change in strength is forecast through Monday, but
Helene is expected to transition to an extratropical cyclone as it
approaches Ireland and the United Kingdom.
Tropical-storm-force winds extend outward up to 185 miles (295 km)
from the center. Wind gusts to 35 mph (55 km/h) were recently
reported on Flores Island in the Azores.
The estimated minimum central pressure is 989 mb (29.21 inches).
HAZARDS AFFECTING LAND
WIND: Tropical storm conditions are occurring over portions of
the warning area at this time. These conditions should begin to
abate by Sunday morning.
RAINFALL: Helene is expected to produce total rainfall amounts of 1
to 2 inches across the far western Azores. Rainfall amounts of 1 to
2 inches (25 to 50 mm) are expected across western Ireland and
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 complete advisory at 1100 PM AST.