PAGASA color coded rainfall warning signal

In a press brief issued by the Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA), the Rainfall Warning System (RWS) was modified effective August 9, 2012.

The former green warning sign was changed to orange. The current color codes are now yellow, orange and red.

The initial color codes being used by the agency since June 20, 2012 were yellow, green and red.

This color scheme was adopted from the Community-based Flood Early Warning System of the United Nations Development Program (UNDP) project.

According to PAGASA, yellow, orange and red are more appropriate as they are associated with awareness, preparedness and emergency, respectively.

The amount of rainfall in the infograph from rappler.com  is applicable only for Metro Manila  area. According to PAGASA, if an RWS will be used in provincial areas, system values may be different.