Formation of the Philippine Twin Tropical Cyclones during the 2008 Summer Monsoon Onset Chen, Tsing-Chang ; Tsay, Jenq-Dar ; Yen, Ming-Cheng ; Cayanan, Esperanza O. Abstract Publication: Weather and Forecasting Pub Date: October 2010 DOI: 10.1175/2010WAF2222395.1 Bibcode: 2010WtFor..25.1317C