Forecast

6th-level divination (ritual)
Casting time: 1 minute
Range: Self
Target: --
Components: V, S, M (a glass thermometer and a copper weathervane)
Duration: 24 hours
Classes: Druid, Wizard
Subclasses:

You predict that you’re going to cast a spell within the next 24 hours and send your future self the power to cast it. Choose a spell of 5th level or lower that you know or have prepared and that has a casting time of 1 action, then expend a spell slot of the spell’s level or higher to forecast it. Once before the spell ends, you can cast the forecasted spell without expending a spell slot, at which time you lose it as your forecasted spell. You also lose the spell as your forecasted spell if you cast this spell again.