MANILA -- Tropical Storm "Chedeng" slightly accelerated Tuesday night as it continues to move west northwestward, prompting weather officials to raise storm signal no. 2 in Catanduanes.
Signal no. 1 remains hoisted over Camarines Sur, Albay, Sorsogon and Samar provinces, the Philippine Atmospheric, Geophysical and Astronomical Services Administration (Pagasa) said.
As of 11 p.m. Tuesday, Chedeng (international codename: Songda) was located 420 kilometers east of Catarman in Northern Samar with maximum sustained winds of 115 kilometers per hour (kph) near the center and gustiness of up 145 kph.
In public storm signal no. 2, winds of greater than 60 kph and up to 100 kph may be expected in at least 24 hours, while in public storm signal no. 1, winds of 30 to 60 kph may be expected in at least 36 hours, or intermittent rains may be expected within 36 hours.
Science and Technology Undersecretary Graciano Yumul Jr. earlier warned that Chedeng would bring heavy rainfall when it makes its landfall.
He said it might affect wide areas, including Metro Manila.
"Its diameter is 500 kilometers. Initial rainfall content would actually be in the vicinity of 20 to 40 millimeters per hour. In the classification of light, moderate to heavy rainfall, that's extremely heavy rainfall," Yumul said.
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