When will we have a tornado?

It is impossible to answer this question for two reasons:
  1. It is impossible to predict when a location will next be hit by a tornado unless that tornado will strike in the next few minutes.
  2. Even if such predictions were possible, you do not provide any information on your location.
For information on current weather hazards in the United States, including tornadoes, you may refer tot he website of the National Weather Service.