Tornadoes are classified into 3 main groups: weak- wind speeds up to 170 km/h: strong- wind speeds of 170- 330 km/h;
Iinkanyamab zihlelwe zangamaqela ama-3: umoya obuthathaka ubaleka ngesantya esi-170 km/h: umoya onamandla ubaleka ngesantya esi-170- 330 km/h;