A tornado appears as rotating, funnel shaped cloud that is in contact with both the surface of the earth and a cumulonimbus cloud. Tornadoes come in many shapes and sizes. On average tornadoes have wind speeds less than 110 miles per hour, but in the most extreme cases they can reach wind speeds of over 300 miles per hour!
Tornadoes can develop so rapidly that little, if any, advance warning is possible. Make sure to always be prepared with the right emergency plan and disaster supplies.