Saturday, May 28, 2011

TYPHOON SONGDA (CHEDENG) as of 28 May @ 4:30pm (Final Advisory)

As of 4:30 this afternoon, Typhoon CHEDENG/SONGDA continued to move northeast and is now outside the Philippine Area of Responsibility. Forecast models show that this system is no longer a threat to the Philippines. SONGDA is moving NNE at 35 kph in the general direction of Okinawa, Japan. Threat to Okinawa, the Ryukyus and Southern Kyushu remains. SONGDA rapidly lost its strength now with wind gusts dropping to 195 kph. It is about 610 km NE of Basco, Batanes or 365 km East of Taipei, Taiwan or almost in the vicinity of the North Philippine Area of Responsibility (PAR). SONGDA's rainbands continue to leave the Batanes, Babuyan and Calayan Group of Islands and is affecting Taiwan. It shall approach in a few hours to the Okinawa Islands of Japan.

At 2am – 29 May, it shall be 210 km NE of Okinawa, Japan (outside the PAR) with wind gusts dropping to 155 kph.

On 29 May at 2pm, SONGDA is forecast to be 260 km SSE of Hiroshima, Japan. Wind gusts drops further to 130 kph.


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1-Day TYPHOON CHEDENG(Songda) Forecast Positions


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AREAS HAVING PUBLIC STORM SIGNAL WARNING

ALL STORM SIGNALS NOW LOWERED:


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FORECAST ANALYSIS AND EFFECTS:

SONGDA continues to pick up speed while gliding several hundred kilometers to the East of Taiwan. Deteriorating weather conditions shall prevail today over Taiwan. Very strong far-fetched waves are expected to hit the shorelines of Taiwan becoming apparent over Okinawa and The Ryukyus. Okinawa, The Ryukyus and Southern Kyushu shall also experience stormy weather (29 or 30 May) as SONGDA heads to the northeast over these Japanese Islands. Extra tropical transition is also expected beginning 30 May.

Expect rough to very rough sea conditions along these areas. FISHING BOATS AND OTHER SMALL SEACRAFTS ARE ADVISED NOT TO VENTURE OUT INTO THE SEA WHILE LARGER SEA VESSELS ARE ALERTED AGAINST BIG WAVES.

SONGDA shall also glide a few hundred kilometers north of Okinawa and Kadena Base and into Southern Kyushu. Once north of Okinawa, SONGDA shall encounter much cooler waters and rapid weakening is expected as the system continues to accelerate turning further to the Northeast. SONGDA is forecast to dissipate in the North Western Pacific Ocean by 01 June.

Forecast models generated different results in the extended forecasts (30 and 31 May) with some models bringing SONGDA over Japan while other models favoring an open water scenario just South of Japan and into the cooler portions of the North Western Pacific Ocean. Few other models even brought the system further north into the Sea of Japan. These inconsistencies are normal in a recurvature scenario.

Gradual weakening of sea waves is expected over Batanes, Calayan and Babuyan Island as the system moves away. The rest of the country shall experience improved weather condition as the Southwest Moonsoon weakens with some passing rain showers and thunderstorms mostly in the afternoon. The intertropical convergence zone shall continue to affect the archipelago as normal weather resumes.

P.S.
This will be the FINAL Advisory on this Tropical Disturbance. A new advisory will be issued once a new tropical disturbance becomes a threat to our country. Mabalos po.

TRACKING MAP OF TYPHOON CHEDENG(Songda)


SATELLITE IMAGE

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