typhoon_haiyan_(yolanda)_in_the_philippines_summary_for_scientists.pdf
of Responsibility (PAR), with an average of 17 TCs (12 typhoons) per year (Met-Office, 2014). About 7 TCs (5 typhoons) make landfall each year, typically towards the end of the main TC season. Factors influencing tropical cyclones in the region Sea surface temperatures (SSTs) of at least 27°C are required