Tonight (Saturday) is my boyfriend's brother and sister-in-law's gender reveal party for their baby, and we are all gathering at their parents' home about 30 minutes away. However, the weather forecast will be treacherous with heavy, hard snowfall and white-out conditions. From our place, it takes about half an hour, but with the road conditions, I worry that travel will be difficult and I don't want to risk an accident.

My boyfriend's brother is adamant on keeping plans the way they are. Originally, the party would be next weekend and it gave us enough time to plan what we would bring, safer travel conditions, etc.

Basically, I don't think it is wise to travel tonight, BUT I feel like if I bring this up with my boyfriend, he will get annoyed again. Are my feelings justified? I don't agree with his brother's decision to plan this small party, knowing well that there will be a snowstorm. It will be dangerous and their family doesn't change plans regardless of weather. How can I bring this up to my boyfriend without sparking some sort of disagreement?