Turn to the set to channel 13. Using the brightness control knob, darken the screen so it is almost black. Turn to channel 2 and leave the channel selector be. Do not reset the brightness after the initial adjustment in step 3. Sit and watch the television set.
Lightning appears on the screen as horizontal streaks or flashes.
A color television produces colored flashes. As long as the screen does not have a steady glow, the storm is not a tornado. This manual described the basic characteristics of tornadoes and the damage that tornadoes have caused. People should take tornadoes seriously and be aware of what the National Weather SErvice means when it issues tornado watches and warnings. Now that the detection of tornadoes has become easier over the years, the detection methods discussed in this manual can be used to give people more time to find the safest refuge in the event of a tornado.