cool moist air
It doesn't they both are two completely different things, and they don't transform into one and other. The scientific names for air mass's descriptions are: Cool = Polar Warm = Maritime Dry = Continental Moist = Oceanic
A tornado usually requires a warm, moist air mass, most often when it collides with a cool and/or dry air mass.
A maritime polar air mass is composed of cold, moist air.
Generally tornadoes form near a boundary between warm, moist air and cool, dry air. The warm, moist air mass is more important as it provide the energy that fuels the storm.
Tornadoes often form when a cool air mass and a dry air mass collide with a warm, moist air mass. This collision produces strong thunderstorms. Under the right conditions these thunderstorms can produce tornadoes.
A maritime polar air mass is a weather system that forms over cold ocean waters. It is characterized by its moisture content and cool temperatures. When this air mass moves over land, it can bring cooler and damp weather conditions.
The effects of force on a mass is acceleration of the mass.
Most often a warm, moist air mass collides with a cool air mass, a cold air mass, or both. However, such a collision alone will only form thunderstorms. Other factors are needed for those storms to produce tornadoes.
maby??
When a relatively cool, dry air mass plows into a warm, moist one it forces the warm air mass upwards along a cold front, often creating thunderstorms. Under the right conditions these thunderstorms can produce tornadoes.
a warm, moist, and unstable air massa warm, moist, and unstable air mass
Tornadoes in the United States are generally associated with collisions of air masses. In mmany cases there is a warm, moist air mass that originates over the Gulf of Mexico. This meets a cool air mass from Canada, a warm, dry air mass from the Rocky Mountains, or both.