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Tropical Storm Helene Intermediate Advisory Number 26A
NWS National Hurricane Center Miami FL       AL082018
800 PM AST Thu Sep 13 2018

...HELENE HEADING NORTHWARD OVER THE EASTERN ATLANTIC...


SUMMARY OF 800 PM AST...0000 UTC...INFORMATION
----------------------------------------------
LOCATION...27.2N 36.6W
ABOUT 965 MI...1555 KM SW OF LAJES 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:

None.

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 800 PM AST (0000 UTC), the center of Tropical Storm Helene was
located near latitude 27.2 North, longitude 36.6 West. Helene is
moving toward the north near 21 mph (33 km/h).  The cyclone is
expected to accelerate and turn toward the northeast over the
weekend. 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 complete advisory at 1100 PM AST.

$$
Forecaster Avila

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