According to the 2002 SIPRI Yearbook and other sources, strategic nuclear weapons "may be stored at the Tirosh depot." The bunkers at Tirosh are part of a complex of storage locations located in the center of Israel, which includes the Tel Nof and Sdot Micha Air Bases. [1]

Source:

[1] Hans M. Kristensen and Joshua Handler, "Appendix 10A: World Nuclear Forces," in SIPRI Yearbook 2002: Armaments, Disarmament, and International Security, Stockholm International Peace Research Institute (Oxford: Oxford University Press, 2002), p. 565; Harold Hough, "Could Israel's Nuclear Assets Survive a Pre-Emptive Strike?," Jane's Intelligence Review, 9 January 1997.