a local region of low pressure or descending air that causes a plane to lose height suddenly

a local region of low pressure or descending air that causes a plane to lose height suddenly

a local region of low pressure or descending air that causes a plane to lose height suddenly

a local region of low pressure or descending air that causes a plane to lose height suddenly

a local region of low pressure or descending air that causes a plane to lose height suddenly

a local region of low pressure or descending air that causes a plane to lose height suddenly

a local region of low pressure or descending air that causes a plane to lose height suddenly

a local region of low pressure or descending air that causes a plane to lose height suddenly

a local region of low pressure or descending air that causes a plane to lose height suddenly

a local region of low pressure or descending air that causes a plane to lose height suddenly