Public Storm Warning Signals
| Signal #1 |
| Signal #2 |
| Signal #3 |
| Signal #4 |
The Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA) releases tropical cyclone warnings in the form of Public Storm Warning Signals. An area having a storm signal may be under:
- PSWS #1 - Tropical cyclone winds of 30 km/h (19 mph) to 60 km/h (37 mph) are expected within the next 36 hours. (Note: If a tropical cyclone forms very close to the area, then a shorter lead time is seen on the warning bulletin.)
- PSWS #2 - Tropical cyclone winds of 60 km/h (37 mph) to 100 km/h (62 mph) are expected within the next 24 hours.
- PSWS #3 - Tropical cyclone winds of 100 km/h (62 mph) to 185 km/h (115 mph) are expected within the next 18 hours.
- PSWS #4 - Tropical cyclone winds of greater than 185 km/h (115 mph) are expected within 12 hours.
These storm signals are usually raised when an area (in the Philippines only) is about to be hit by a tropical cyclone. As a tropical cyclone gains strength and/or gets nearer to an area having a storm signal, the warning may be upgraded to a higher one in that particular area (e.g. a signal #1 warning for an area may be increased to signal #3). Conversely, as a tropical cyclone weakens and/or gets farther to an area, it may be downgraded to a lower signal or may be lifted (that is, an area will have no storm signal).
Classes for preschool are canceled when Signal #1 is in effect. High school classes and below are canceled under Signal #2 and classes for colleges and universities and below are canceled under Signal #3.
Read more about this topic: Typhoons In The Philippines
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