In the battle against the giant Porphyrion, at the Wolf House, Jason Grace uses his power to control the wind to tame Tempest to help him in the fight. Tempest manages to survive when Hera unleashes her true form after she is released from her cage by Leo Valdez and Piper McLean. However, Tempest "scatters" off and it was unknown where he went, but Hera tells Jason he will see him again.
Tempest was called by Jason to ride towards the Topeka 32 mile marker (and consequently finding Bacchus) during their trip to Kansas. After being possessed by an Eidolon, Jason, on Tempest, fights Percy on Blackjack. He dissipated after Jason fell off.
Tempest has been shown to take the form of a horse made out of thunderclouds and electricity. He hasn't been shown of taking a human form.
- Tempest shares a name with one of the Gray sisters.
- He is the half-brother of the Boreads and Khione.