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Tropical Weather Outlook RSS Feed

Issued: Aug 18, 2013 02:00 am HST

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

1. Tropical storm Pewa has moved just west of the international date line, and is now located over the northwest Pacific ocean about 960 miles east southeast of Wake Island. Pewa is moving toward the west northwest at about 13 mph. For additional information on Pewa, see bulletins issued by the regional meteorological center in Tokyo Japan under WMO text product header wtjp22 rjtd. For u.s. Interests, see department of defense warnings issued by the joint typhoon warning center in Honolulu, Hawaii under WMO text product header wtpn31 pgtw.

2. Showers and thunderstorms associated with a surface trough located about 1120 miles west southwest of Lihue, Hawaii are moving westward at 10 to 15 mph. Little significant development of this system is expected due to its close proximity to the outflow from tropical storm Pewa, which has been creating unfavorable winds aloft above the system. This system has a low chance, 20 percent, of becoming a tropical cyclone during the next 48 hours.

3. Showers and thunderstorms associated with another surface trough located about 650 miles southwest of Lihue, Hawaii are moving westward at 10 to 15 mph. Even though thunderstorms have increased in coverage and intensity overnight, little significant development of this system is expected due to strong upper level winds over the surface trough. This system has a low chance, 10 percent, of becoming a tropical cyclone during the next 48 hours.

4. Showers and thunderstorms associated with a weak disturbance located about 1100 miles east southeast of Hilo, Hawaii have increased in coverage and intensity overnight. Little significant development of this system is expected as this disturbance moves west northwest at 10 to 15 mph during the next 24 to 36 hours due to very strong southerly winds over the system. However, the upper level winds may relax slightly by late Monday, and this system has a low chance, 10 percent, of becoming a tropical cyclone during the next 48 hours.

Elsewhere, no tropical cyclones are expected through late Monday night.


Graphical Tropical Weather Outlook

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