The weather forecast called for heavy overcast, and was accurate.
When students ask me about shooting B&W, there are a few things I tell them. First, that it’s a good option if there’s not much color to begin with. That’s what happened to me on a winter trip to Yosemite. The weather forecast called for heavy overcast, and was accurate. So I went ahead and switched my camera to “Monochrome,” and honestly, even when I occasionally went back to color, the photos looked about the same.