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BULLETIN
HURRICANE OLAF ADVISORY NUMBER  20
NWS NATIONAL HURRICANE CENTER MIAMI FL       EP192015
200 PM PDT MON OCT 19 2015

...OLAF RAPIDLY STRENGTHENS TO A CATEGORY FOUR HURRICANE...
...EXPECTED TO CROSS INTO THE CENTRAL PACIFIC BASIN TONIGHT...


SUMMARY OF 200 PM PDT...2100 UTC...INFORMATION
----------------------------------------------
LOCATION...10.0N 138.7W
ABOUT 1280 MI...2065 KM ESE OF HILO HAWAII
MAXIMUM SUSTAINED WINDS...130 MPH...215 KM/H
PRESENT MOVEMENT...W OR 275 DEGREES AT 12 MPH...19 KM/H
MINIMUM CENTRAL PRESSURE...954 MB...28.17 INCHES


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


DISCUSSION AND 48-HOUR OUTLOOK
------------------------------
At 200 PM PDT (2100 UTC), the eye of Hurricane Olaf was located near
latitude 10.0 North, longitude 138.7 West. Olaf is moving toward the
west near 12 mph (19 km/h), and this motion is expected to continue
through tonight. A turn toward the west-northwest is forecast on
Tuesday, followed by a turn toward the northwest on Wednesday.

Satellite imagery indicates that maximum sustained winds have
increased to near 130 mph (215 km/h) with higher gusts. Olaf is a
category 4 hurricane on the Saffir-Simpson Hurricane Wind Scale.
Some additional strengthening is forecast tonight. Some fluctuations
in intensity are possible on Tuesday and Wednesday.

Hurricane-force winds extend outward up to 30 miles (45 km) from the
center and tropical-storm-force winds extend outward up to 140 miles
(220 km).

The estimated minimum central pressure is 954 mb (28.17 inches).


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


NEXT ADVISORY
-------------
Next complete advisory at 800 PM PDT.

$$
Forecaster Brennan

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