What two weather conditions keep the antenna lead atop the mast from being repaired in the film 'All Is Lost'?

In the film 'All Is Lost,' the antenna lead atop the mast cannot be repaired due to the severe weather conditions, specifically high winds and torrential rain. These conditions make it unsafe for the protagonist to attempt the repair, as the risk of falling or being swept off the mast is too great. The relentless storm exacerbates the situation, compounding the challenges of navigating and surviving at sea.