Timestorm
A Timestorm is one of the side effects of disrupting the flow of time itself, caused by someone altering the timestream though time travel. Although what a timestorm does by itself is never fully explored, it can't be anything pleasant.
Visually, a timestorm appears as bright, blue and white light patterns moving erratically in the air, accompanied by lightning, to those within it. When viewed from outside, it begins as a cyclone-like shape, widest from its point of origin and stretching upwards. When it has reached a substantial size, a large energy "whirpool" erupts from the point of origin, spreading quickly throughout the cosmos. Those who are directly affected negatively by the the changes in time within a timestorm experience agonizing pain, and are prone to phase in and out of existence, as well as having their appearance change wildly, possibly as a result of different outcomes in the timeline shifting.
Fiction
Beast Wars cartoon
When Megatron attempted to terminate the stasis-locked Optimus Prime in a gambit to change history in favor of the Decepticons and their descendants, the Predacons, a timestorm was formed. With Prime's severely damaged head as it's origin point, the storm spread exponentially, spreading all the way to Jupiter and beyond. The Agenda (Part III) However, Megatron's plans were thwarted by the combined efforts of the Maximals and Blackarachnia, and When Optimus Prime was put on auxiliary life support, the timestorm stabilized. Although no longer a roaring vortex of doom, reality was nonetheless in flux, and the Maximals faded in and out of existence while the course of the future was still uncertain. Once Optimus Prime was fully repaired and returned to stasis lock, the timestorm finally disspated. Optimal Situation The Vok however took notice of the storm's occurance, and prepared to eliminate Megatron's interference in the past once and for all. Other Victories