Strengthening The Resiliency of Our Nation on the Ground Act or the STRONG Act This bill requires the Office of Science and Technology Policy of the Executive Office of the President to establish an interagency working group to (1) provide a strategic vision of extreme weather resilience; (2) conduct an analysis of current and planned federal activities related to achieving short- and long-term resilience to extreme weather and its impacts on the United States, such as flooding, drought, and wildfires; and (3) develop a National Extreme Weather Resilience Action Plan. The plan must include (1) the establishment of an online portal that directs users to key data and tools to inform resilience-enhancing efforts; and (2) the identification of a coordinating entity to establish and maintain such portal and to coordinate the implementation of the plan and track its progress.