Abstract: A weather radar system includes a radio frequency (RF) receiver, an entity detector, and a machine learning circuit. The RF receiver generates a radar data signal based on a received radar return. The entity detector calculates an entity value based on the radar data signal, compares the entity value to a threat detection threshold, and outputs an indication of a threat based on the entity value exceeding the threat detection threshold. The machine learning circuit receives at least one of (1) sensor data regarding an environment about the antenna or (2) platform state data regarding a platform, executes a radar detection model to calculate an updated threat detection threshold based on the radar data signal and the at least one of the sensor data or the platform state data, and provides the updated threat detection threshold to the entity detector to update the entity detector.