  A Weyl semimetal denotes an electronic phase of solids in which two bands
cross linearly. In this paper we study the effect of a spatially correlated
disorder on such a phase. Using a renormalization group analysis, we show that
in three dimensions, three scenarios are possible depending on the disorder
correlations. A standard transition is recovered for short range correlations.
For disorder decaying slower than $1/r^{2}$, the Weyl semimetal is unstable to
any weak disorder and no transition persists. In between, a new phase
transition occurs. This transition still separates a disordered metal from a
semi-metal, but with a new critical behavior that we analyze to two-loop order.
