[Concerning a nature check to tell if a blizzard is coming while travelling through the mountains]
As an example of a scenario where they know bad weather is approaching, they need to do something. I'll give them a chance to come up with ideas, possibly looking for a cave or building a shelter which could result in perception or survival checks. But I may also remind them of something they've forgotten or have them roll to see if they think of a different option I know about that they do not.
The main point is that as a DM I want to establish a fiction that has interesting challenges, ties to NPCs, motivation beyond just killing things for loot (not that there's anything wrong with that). Ultimately all I can say is that I want the world to feel "real". Sometimes the PCs have to deal with the fog of war, sometimes what they thought was fact is instead fiction, sometimes they know more about their opponent(s) than the opponent knows but sometimes it's switched.
So I'm not "training" my players to do anything, I'm trying to accommodate their style while hopefully building interesting campaigns together.
Either. Some will just be common knowledge and exposition before travel starts, if the group is familiar with the area they will know that travel in the high mountains can be dangerous. If they're new to the area it depends on if they chatted with the locals. A lot of times it simply comes down to what I think the PCs would know or likely to do. They can also mention that they're keeping an eye on the weather or simply ask for a check.Do you call for a nature check, or do the players do it themselves? If the latter, how did they learn to do that?
As an example of a scenario where they know bad weather is approaching, they need to do something. I'll give them a chance to come up with ideas, possibly looking for a cave or building a shelter which could result in perception or survival checks. But I may also remind them of something they've forgotten or have them roll to see if they think of a different option I know about that they do not.
The main point is that as a DM I want to establish a fiction that has interesting challenges, ties to NPCs, motivation beyond just killing things for loot (not that there's anything wrong with that). Ultimately all I can say is that I want the world to feel "real". Sometimes the PCs have to deal with the fog of war, sometimes what they thought was fact is instead fiction, sometimes they know more about their opponent(s) than the opponent knows but sometimes it's switched.
So I'm not "training" my players to do anything, I'm trying to accommodate their style while hopefully building interesting campaigns together.