R: local region; T: environment; D: 8 hours

 

Choose an effect less than or equal to [sum]:

 

1 Overcast
2-3 Raining
4-6 Storming
7+ Torrential

After [dice] time, the weather will change to that effect for the 8 hour duration:

 

1 [dice] 1 Week
2 [dice] 1 Day
3 [dice] 1 Hour
4 [dice] Now

Until the weather comes to pass, further performances of this Ritual have a 25% chance to fail, even with greater than 0 [dice]