That is when lightning is your friend. Lights up the sky.
And the exploding flashes of transformers. That is all that warned me of a tornado that hit my house! Not much time to get myself and my dogs into an interior hallway on the floor. I was trying for the bathroom but could not make it. No warnings on TV, Radio or sirens. The weather guys who came out of Jackson, Ms said the town I was in was just below the range of their radar and they did not see it. Investigation says it was an F2.