You’re totally right, weather is a very important and often overlooked factor in wilderness travel. Did you ever read the Wilderness Survival Guide? Lots of good ideas in there regardless of what system you’re playing.
I can admit that I’ve spaced at times and just completely forgotten even describing the time of year and what type of weather patterns are happening at any given time. It really can affect things. For example, tonight we have heavy rain and flooding in the Snoqualmie Valley here in Washington State. Some of the roads have water over the roadway (river over the road) which is fine if you’re in a vehicle that rides up high and can go through it, but if you were on foot as a traveler that could seriously impede your travel especially when the layout of the land prevents you from going around.