Negres Tempestes (Black Storms) is an anarchist organisation based in the Catalan Countries. The group defends the principle of independence and self-determination, but opposes the creation of new statist institutions, being highly critical of the notion that independence necessitates the "attainment of a state, with the authoritarianism it implies". The organisation describes itself as opposed to "the state as a basis of authority, repression and economic exploitation" as well as "dogma, states or borders", while participating in struggles in defence of the Catalan language and culture.