Although it is not what usually happens, it is possible. If an anonymous call or calls contain sufficient information to reasonably verify the allegations, then a court may find them adequate to support a search warrant.
"Joe Smith is a drug dealer" -- not adequate.
"Joe Smith lives at 1123 Anyplace Drive, a light grey bungalow, and he is selling drugs out of his house. He keeps the drugs inside of the middle couch cushion of a brown leather couch in his living room. He's 5'11, has light brown hair and blue eyes. I saw him selling drugs there this afternoon. You'll find drug baggies in his garbage can, outside of his house." -- probably more than adequate, assuming the verifiable factual information checks out.

