(UPDATED) Tropical storm "Gorio" intensified further while moving over the Philippine Sea early Thursday, state weather bureau PAGASA said.
At 5 a.m., Gorio was packing top sustained winds of 85 kilometers per hour (kph) near the center, and gusts of up to 105 kph, PAGASA meteorologist Samuel Duran told DZMM.
The tropical storm was last spotted 500 km east of Casiguran, Aurora.
Gorio is expected to intensify into a severe tropical storm within the next 24 to 36 hours, said Duran.
"Papalakas pa po kasi nasa karagatan pa po ito," he explained.
The tropical storm will enhance the habagat or southwest monsoon, which will bring rains over Luzon and the Visayas.
This may trigger floods and landslides in Metro Manila and the regions of Ilocos, Cordillera, Central Luzon, Calabarzon and the provinces of Mindoro and Palawan, PAGASA said in its 6 a.m. advisory.
Visayas and the regions of Cagayan Valley, Bicol and the provinces of Marinduque and Romblon meanwhile will experience cloudy skies with light to moderate rains and thunderstorms.
Partly cloudy to cloudy skies with isolated rains or thunderstorms will prevail over Mindanao.
Some local governments in Metro Manila and nearby areas have suspended classes Thursday because of heavy rains:
Las Piñas City
San Fernando, Pampanga
San Juan City
San Pedro, Laguna
Sta. Maria, Bulacan
PRE-SCHOOL TO HIGH SCHOOL
San Mateo, Rizal
SCHOOLS AND UNIVERSITIES
Ateneo de Manila University (pre-school to senior high school)
Centro Escolar University - Makati, Manila and Malolos
Claret School of Quezon City
De La Salle - College of Saint Benilde
Don Honorio Ventura Technological University - Bacolor, Pampanga
Far Eastern University - Diliman, Quezon City
Imelda Operio's Learning School (pre-school to senior high school)
La Salle Greenhills High School
Lyceum of the Philippines - Manila
Manila Tytana Colleges
Nest Classes, Teacher's Village
OB Montessori - Fairview, Greenhills, Las Piñas, Sta. Ana
Pamantasan ng Lungsod ng Valenzuela
Philippine College of Criminology
Philippine School of Business Administration - Quezon City
Polytechnic University of the Philippines - Metro Manila campuses)
Poveda High School
Saint Mary's College
School of the Holy Spirit
St. John Technological College of the Philippines - Quezon City
St. Theresa College - Quezon City
Valenzuela City Polytechnic College
Gorio is expected to leave the Philippine area of responsibility late Sunday if it continues moving north northwest at 13 kph, Duran said.
No tropical cyclone warning signal has been raised so far.
Visit the ABS-CBN Weather Center for the latest weather updates.