Is there a weather bonus cap?

Does using rank 1 RainCasting in a thunderstorm give more production bonus than just thunderstorm or RainCasting alone would? Also, do any cloud bonuses from multiple casters stack?

These have both already been asked on this very page.

Where? I looked through the entire page before posting and again after your reply, I have found no discussions about the first one (cap) and the unanswered one about multiple raincasters is only about the water cannon boost(I'm asking about the production & gathering effects).

It's literally right above where you're talking about;

If searching for "stack" doesn't make it visible try;

http://wiki.mabinogiworld.com/index.php?title=Talk:Rain_Casting&action=edit&section=7

Exactly, it's not a threaded discussion. it's at the VERY top

Up on the very very top.

There is definitely nothing about this at the very top.

Ok, I've checked the page myself. There used to be a line that stated something along the lines of "Rain Casting does not stack with weather effects". It must have been cut sometime during the rearrangement.
My own personal testing found that so much as "cloudy" would overwrite my R1 rain casting, that is to say, the production effects of rain cast only occur during a clear day.