Depends how deep it is and the strength of the tornado. However, they are still better than nothing when you can't get to shelter.
If the tornado is still distant, drive perpendicular or diagonal to its path (depending on the roads) to get out of the way. If the tornado is getting close, abandon the car and get in a ditch as a last resort or, better yet, a nearby sturdy building.
If caught outside during a tornado, find a low-lying area like a ditch and lie flat with your hands covering your head. Avoid seeking shelter under bridges or overpasses. If possible, try to locate a sturdy building for protection.
If you are caught in the open during a tornado, the best course of action is to seek shelter immediately. If no shelter is available, lie flat in a low-lying area such as a ditch and cover your head and neck with your arms. Avoid areas with trees or power lines that can fall on you.
If caught outside during a tornado with no shelter, try to find a low-lying area like a ditch or ravine. Lie flat and cover your head with your hands to protect yourself from flying debris. Avoid seeking shelter under highway overpasses or bridges, as these areas can be even more dangerous during a tornado.
Despite it being a funnel, you are less likely to be pulled into a tornado if you are below ground level. The wind tend to go over the ditch more than they go into it. Additionally, the ground around you can shield you from flying debris, the biggest danger in a tornado. Keep in mind, though that a ditch is only to be used as a last resort. If there is a sturdy building nearby go there instead.
If you cannot get to any safe shelter or even a ditch during a tornado, lie flat on the ground.
get in a ditch
To some degree. You should only take cover in a ditch from a tornado as a last resort if no shelter is available.
try and get as low as you can. like in ditch
When you see a tornado, go into a secure building or if there are none near you, huddle in a nearby ditch.
If no shelter is available lie down in a ditch.
Lie in a ditch or depression in the ground if you cannot get to shelter.
Lie down in a ditch or depression in the ground and cover your head.
If you are outside with no shelter a available and a tornado is coming the best option is to lie in a ditch or depression in the ground
No. You should take cover in a ditch only as a last resort if no other shelter is available. A ditch is simply better than being completely exposed. The only truly safe place is underground or in a reinforced enclosure such as a tornado shelter or bank vault.
Get out and hide in a nearby ditch deep enough so you can hide in it.
Get in a ditch and lay face down protecting your head with your hands.