Get out your rain gear! Its going to get wet in Thunder Bay. Environment Canada's Geoff Coulson says a low pressure system is moving into the area that could bring 20 to 30 millimetres of rain. Coulson says if there is any thunderstorm activity there could be even more rain and some areas could see rainfall warnings. The weather will turn around for the weekend, with sunshine and temperatures nearing the 20 degree mark for Saturday, Sunday and Monday.