A semi sequel to Sands of Time, reading not required.

When Kitty first came to Equestria, it was a long road to friendship. But now, nopony feared the giant winged cat, and Kitty was known for his ability.

Time travel. He could go to the past, or stop time for himself, but Applejack was looking for something else.

A future prediction. And though Kitty never told what the future held, citing grave dangers that might happen, what could happen if she knew the weather? Lots.