A Tempest Rocket is an Imperial ballistic rocket munition used by some Imperial military aircraft in both anti-aircraft and anti-armour roles, including the Adeptus Astartes Storm Eagle assault gunship. The Tempest Rocket was an antiquated design that was actually being phased out in favour of more powerful munitions at the time of the Horus Heresy in the early 31st Millennium, though it is still in use in the late 41st Millennium. Tempest Rockets are nevertheless simple and reliable ballistic weapons able to deal with moderately armoured targets and shoot down enemy aircraft.
- The Horus Heresy - Book One: Betrayal (Forge World Series) by Alan Bligh, pg. 215