Request GM advice for Control Weather spell underground

[MightyOwlet]

My group ended our last game rather abruptly, but my players warned me about their plan to use control weather in the upcoming session to blow away the smoke that was in their way (which I unfortunately forgot until now, a few hours before the game.) The problem is that they are underground and the source of the smoke is not natural.

Reign of Winter book 6 details:

They are moving from one underground cavern to another(pg 44 if you have the book), this next cavern is filled with smoke from an eversmoking bottle. The description states that the smoke can be dispersed with wind, it doesn't completely dissipate until the bottle is resealed. The entire area is in a sort-of mini dimension.

I'm figuring that if the spell can control wind, that can blow the smoke away or maybe thin it and increase the visibility range. The problem is that I'm not convinced this spell works underground. Is there such a thing as underground weather?

[Joey Cote]

Well, one thing I see in the description of the spell is that is says

"You can call forth weather appropriate to the climate and season of the area you are in."

Does that underground area normally have high winds at this time of the year?

[MightyOwlet]

The book doesn't say anything about high winds, or even mild ones, in any of the caverns.

Some Map details:

The cavern is about 150 feet long and maybe 70 feet wide. There are some caverns below this one that are described as having magma and burning gas vents.
If I understand the science, warm air moves up, so that could create some air movement, but there's only a very small hole connecting the caverns.

I guess I need to go google some science.

Thanks!

[MightyOwlet]

Well, seven minutes of research into "cave breathing" has told me that I can just tell the players to find some way of changing air pressure outside the cave and that should adjust air pressure inside the cave system by way of wind! Now the ball's in their court and they can solve the problem for me.

[Quixote]

If they control the weather outside, a pressure increase or decrease should be easy enough.

At any rate, using control weather to get rid of fog is a fairly hefty price tag in terms of resources. I think it's fine. Creative, not abusive, plausible enough to be effective.

[gnoams]

Control weather wouldn't do what they want. I would suggest control winds instead.

[Lady Asharah]

Control Weather seems like a complete overkill to blow away some smoke.

[Quixote]

gnoams wrote:

Control weather wouldn't do what they want. I would suggest control winds instead.

If they create a storm outside and it causes a drastic change in air pressure. ..should be fine, yeah?

Also, what's the difference between control weather and control wind? Is wind not part of the weather? I swear, there's so much extra crap in this game, if they hadn't come out with 2nd ed., we'd have drowned in all this content.

Lady Asharah wrote:

Control Weather seems like a complete overkill to blow away some smoke.

Exactly what I was saying. Why not let them have it? If they want to level the mountain flat instead of taking the path through it, that's just less resources for later on.