arXiv:2610.20787v1 Announce Type: new Abstract: Maintaining the resilience and reliability of electrical power grids under weather driven disturbances is a critical challenge for modern power system planning and operation. Among weather driven hazards, tornadoes and hurricanes are mostly considered for research purpose overlooking straight line winds despite its significant contribution to transmission line outages and cascading effects. Accurate modeling of these events is essential for operational decision making, and long term infrastructure planning and investment. This research explores the probabilistic risk assessment of transmission lines under straight line winds and their impacts on system level performance. The approach examines the probability of transmission towers failure, transmission lines outages, cascading effects, and identify critical transmission lines. The IEEE 118 bus system was utilized to validate the proposed approach and to demonstrate how wind induced component failures propagate throughout the network, affecting power grid reliability.