During the Clone Wars, Obi-Wan Kenobi and Anakin Skywalker happen upon a disguised Separatist fleet known as the Storm Fleet at the Llon Nebulae, and track it to Kronex spaceport. There, with the help of an old contact of Kenobi's, Fizz, the two Jedi uncover the fleet's intended destination: the planet Cyphar, with the presumed purpose of intimidating the local populace into allowing the Separatists to establish a base there.
When the Storm Fleet takes off into space and towards its intended destination, Skywalker, against his master's will, approaches the ships in his starfighter, pursuing them into a nearby asteroid field, destroying two of them, and further hindering the Separatist operation.
Before the advent of Star Wars: The Clone Wars, Storm Fleet Warnings was established as taking place in 21.67 BBY, approximately 4 months after the First Battle of Geonosis.