The M-11 Shtorm (Russian: М-11 «Шторм»; English: Storm) is a Soviet naval surface-to-air missile system.

It was originally intended to be installed on the Project 1126 warship, but both the ship and missile system were canceled in June 1961.

The design was completed in April 1962, and included a modified version of the ZIF-101 launcher, that was used with the M-1 missile system.

Between 1964 and 1966 sea trials were conducted on the missile testbed OS-24 which had previously been the heavy cruiser Voroshilov.

The system was installed on Moskva, which was commissioned on 25 December 1967, but development continued until 1969 when it was officially accepted into service.