Jane's reports that bunkers south of the Tel Nof Airbase house nuclear gravity bombs for F-4s, F-15s, and F-16s stationed at the airbase.[1] The 2002 SIPRI Yearbook concurred, reporting that "operational nuclear weapons are thought to be stored near the Tel Nof AB." [2]

Sources:
[1] Harold Hough, "Israel's Nuclear Infrastructure," Jane's Intelligence Review, 1 November 1994.
[2] 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.