ok SEP definitions of turbulance.........
Light : slight / rapid / rhythmic bumpiness without changes in alt (liquids shaking but not splashing) Little or no difficaulty walking
Mod: similar to light turb but of greater intensity, causes rapid jolts or bumps without appreciable changes in alt (liquids splash and items are dislodged) difficaulty walking
Severe: Turb in which aircraft is violently tossed around (items falling, lifting off the floor, food service impossible) impossible to walk
