Answer:
When any Public Storm Warning Signal Number is hoisted or put in effect for the first time, the corresponding meteorological conditions are not yet prevailing over the locality. This is because the purpose of the signal is to warn the impending occurrence of the given meteorological conditions. Based on the advisory level, find out if your area is affected. For example, if you live in Marikina, go to Project Noah. The real-time flood reference for Marikina can be seen if you click flood maps and go to flood inundation. PAGASA generates flood scenario for Marikina river every 10 min.
