Tornadoes that do not occur in association with a mid-level mesocyclone (or a pre-existing wall cloud) of a supercell are called ___________________ _ tornadoes.
Fill in the blank with correct word.
Question 2
To an observer on the ground, the first sign that a supercell may give birth to a tornado is the sight of ___________________ __ at the base of the storm.
Fill in the blank with correct word.