000
WTNT31 KNHC 310844
TCPAT1

BULLETIN
Tropical Storm Irma Advisory Number   4
NWS National Hurricane Center Miami FL       AL112017
500 AM AST Thu Aug 31 2017

...IRMA CLOSE TO HURRICANE STRENGTH...


SUMMARY OF 500 AM AST...0900 UTC...INFORMATION
----------------------------------------------
LOCATION...16.5N 32.9W
ABOUT 590 MI...950 KM W OF THE CABO VERDE ISLANDS
MAXIMUM SUSTAINED WINDS...70 MPH...110 KM/H
PRESENT MOVEMENT...W OR 280 DEGREES AT 12 MPH...19 KM/H
MINIMUM CENTRAL PRESSURE...997 MB...29.44 INCHES


WATCHES AND WARNINGS
--------------------
There are no coastal watches or warnings in effect.


DISCUSSION AND 48-HOUR OUTLOOK
------------------------------
At 500 AM AST (0900 UTC), the center of Tropical Storm Irma was
located near latitude 16.5 North, longitude 32.9 West.  Irma is
moving toward the west near 12 mph (19 km/h).  A west-northwestward
motion is expected today and tonight, followed by a generally
westward motion on Friday.

Maximum sustained winds have increased to near 70 mph (110 km/h)
with higher gusts.   Additional strengthening is forecast, and
Irma is likely to become a hurricane later today.

Tropical-storm-force winds extend outward up to 60 miles (95 km)
from the center.

The estimated minimum central pressure is 997 mb (29.44 inches).


HAZARDS AFFECTING LAND
----------------------
None


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

$$
Forecaster Pasch