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Issued: Aug 18, 2013 20:00 pm HST

For the central north Pacific, between 140°W and 180.

1. The Central Pacific Hurricane Center is issuing advisories on tropical storm Unala, located 1330 miles west southwest of Lihue Kauai, under AWIPS header TCMCP5 and WMO header WTPA25 PHFO.

2. Showers and thunderstorms associated with a disturbance located about 900 miles west southwest of Lihue Kauai are moving westward at 10 to 15 mph. Thunderstorms have intensified recently near an apparent low level circulation center. Upper level winds have become weaker in the area, increasing the chances of development, at least in the near term. This system has a medium chance, 30 percent, of becoming a tropical cyclone during the next 48 hours.

3. Showers and thunderstorms associated with a weak disturbance located about 1000 miles east southeast of Hilo Hawaii have decreased in coverage and intensity since this afternoon. Little significant development of the feature is expected as it moves west northwest at 10 to 15 mph over the next 24 to 48 hours. The system has a low chance, 10 percent, of becoming a tropical cyclone during the next 48 hours.

Elsewhere, no tropical cyclones are expected through Tuesday evening.


Graphical Tropical Weather Outlook

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List of Central Pacific Outlooks (June 2010-present)