Philippines August 2023 Jurisdictional Update
If the Philippine weather bureau issues a warning for Tropical Cyclone Wind Signal No. 1 (winds of at least 39-61km/h are expected in the locality within 36 hours), all aircraft with MTOM of 5,700 kgs or less are 1) strictly prohibited from taking off and landing at airports under warning of TCWS No. 1 and above, 2) strictly prohibited from conducting ground operations, and 3) when the aircraft is already en-route and a TCWS is declared within its immediate vicinity or destination, the Pilot-in-Command should land the aircraft at the nearest suitable airport at which a safe landing can be made (or return to point of origin).
For the aircraft operator, they would have a more objective basis by which to claim “bad” weather caused the delay or cancellation of a flight. For the passenger, it is advisable to be on the lookout for official weather forecasts by the Philippine weather bureau in order to plan ahead.