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MANILA, Philippines – Tropical Storm Rolly approached the western border of the Philippine area of responsibility on Monday evening, according to the latest Philippine Atmospheric, Geophysical and Astronomical Services (Pagasa) bulletin.
Rolly was located 365 kilometers west of the city of Iba in Zambales, moving west at a speed of 20 kilometers per hour (kph). While it still had maximum sustained winds of 65 km / h with a gust of up to 80 km / h, it was expected to weaken as a tropical depression over the Western Philippine Sea.
Rolly no longer had a direct effect on the country, but would combine with Tropical Storm Siony to intensify the surface wind from the northeast, which was expected to bring strong winds over northern Luzon.
“Northeast winds intensified by tropical storms Rolly and Siony will bring strong to near-gale conditions with higher gusts over Batanes, the Babuyan Islands and the northern portions of Cagayan and Ilocos Norte,” Pagasa said.
This would cause rough to very rough seas across the northern Luzon coastline and the western coastline of central Luzon, prompting Pagasa to issue a gale warning.
According to previous forecasts, Siony was moving erratically. Pagasa would keep a close eye on him as his probability cone was wide, meaning he had a wide range of possible clues, stretching from the extreme north of Luzon to central Luzon.
Siony is expected to remain nearly stationary, moving north and then east on Tuesday, turning south on Wednesday and completing a loop moving southeast by Thursday.
However, from there, the tropical storm can stalk north towards the extreme north of Luzon, or south towards central Luzon.
As of Monday afternoon, Siony had maximum sustained winds of 65 km / hr with a gust of up to 80 km / h.
“The movement of Tropical Storm Siony would be erratic. It will stay in the middle of the Philippine Sea for the next two days and then possibly loop due to two areas of high pressure pushing it away, ”said climate specialist Ariel Rojas previously in Filipino.
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