A U.S. Air Force HC-130J Hercules aircraft approaches the edge of Hurricane Florence in a September 2018 mission.Tech. Sgt. Chris Hibben/US Air ForceSevere weather degrades the accuracy of navigation systems and hampers military operations.Climate change has made weather patterns more erratic and harder to forecast.This makes it harder for commanders to plan missions and prepare for weather effects.More extreme weather is scrambling the high-tech systems that have given the US military its edge.For example, severe weather can degrade navigation systems such as GPS and sensors on precision-guided munitions.