Tropical storm Vamco formed in the South China Sea on September 13, 2015 and went ashore in Vietnam a few days later. Although short lived Vamco dropped very heavy rainfall over the mountainous terrain of central Vietnam and in Laos and eastern Thailand. An Integrated Multi-satellite Retrievals for GPM (IMERG) rainfall analysis is shown here for the period from September 12-15, 2015. This analysis indicates that during this short period over 220 mm (8.7 inches) rain fell along the tropical storm's path. Flash floods and landslides were likely in areas where this drenching rainfall occurred.