I've never seen a tornado on the ground but I saw one over the water when I was at the beach. All of a sudden the wind picked up, it got really dark and there were sirens ringing through the air while everyone rushed to get inside.
I have been in Many and also Hurricanes -- and i also have seen them come out of no where -- seen them take out the neighbors - house and all - and not a drop of rain in sight or no wind in my yard --- I have see them take out row of chicken houses - chickens and all --- On a tornado it usually rains / storms and then it gets quiet -- and when it gets quiet you hear a train a coming - and it gets louder and louder - until it is on top of you --- i have driven (even ) tractor trailers and have seen miles of others Blown off the road --- (( looking for a Author )
Yes, first you will get an emergency public notification on the television or radio program. Soon after the tornado warning or watch you will get a lot of hale falling, dark sky or some force wind driven rain. Finally, if you are in it's path all you can see is destruction and it sounds and feels like a loud vacuum cleaner.
I have gotten close to one. There was a huge tornado watch in fourth grade during school. The Lind way loud and rain was going everywhere. We had to go under our cubbies and put our hands over our neck. After a while the rain stopped. And it began to get light out again, as if nothing happened. It was a very creepy feeling.