More rain is expected on Friday, September 17, from a low pressure area (LPA) and the intertropical convergence zone (ITCZ).
The LPA was last spotted 50 kilometers northeast of Guiuan, Eastern Samar, still embedded in the ITCZ, late Thursday evening, September 16.
In an advisory, the Philippine Atmospheric, Geophysical, and Astronomical Services Administration (PAGASA) said the LPA remains "less likely" to become a tropical depression on Friday.
But it will move west northwest toward Bicol and Mimaropa, and trigger more rain, along with the ITCZ.
Below is the rainfall forecast for Friday.
Affected areas should watch out for isolated flash floods and landslides. (READ: FAST FACTS: Tropical cyclones, rainfall advisories)
The weather bureau earlier said other parts of the Philippines may see isolated rain showers or localized thunderstorms.
If the LPA develops into a tropical depression, it would be given the local name Lannie. (READ: LIST: PAGASA's names for tropical cyclones in 2021)