If Druidcraft can predict a location's weather for the next 24 hours, would it note weird weather caused by Control Weather, such as a sudden storm at midday on an otherwise clear and cloudless day? Or would only naturally occurring weather be predicted?
I predict the matter will come up at our next game session (my friends like to exploit loopholes, but in good fun) so I'm hoping to be prepared for the inevitable. I read the answer to "How reliable is Druidcraft weather prediction?", but my question is more specific than that question answers.
Best Answer
Time of Casting/Acting is Important
If a Druid were to attempt predict the Weather before the spell Control Weather was cast, then they would have no idea that the weather was changing because they would not have that information.
If they were to attempt to predict the Weather after the spell was cast, then I would rule that they certainly did have that information.
Also, the pertinent Druidcraft text reads:
Thus, since it only lasts 1 round (or 6 seconds) it can't predict any use of Control Weather after the spell, because that would be like saying Detect Magic could be used to detect magic through prediction after its duration had ended. The effect has a Duration: It last for 6 seconds and then disappears, and cannot be retroactively used to predict the use of Control Weather.
EDIT: It's been how many months and I forgot to include this simple Caveat? I just want to throw in that you would have no indication other than common sense whether weather effects were magically created or not (for example, if you see an intense blizzard in a desert that hasn't gotten any precipitation for the last 250 years, something might be up.)