Can any judge in California sign a warrant for anyone in any city in California or is there jurisdiction?

In California, judges generally have the authority to issue warrants within their own jurisdictions, which typically corresponds to the county where they serve. However, a judge can sign a warrant for someone in another jurisdiction if it is related to a case they are handling or if it's a matter of statewide concern. For certain types of warrants, such as search warrants, the issuing judge must be familiar with the specifics of the case. Overall, while there is some flexibility, jurisdictional boundaries are an important factor in warrant issuance.