Tornadoes, like other forms of stormy weather, are associated with low pressure.
Tornadoes produces low pressure.
Tornadoes and other forms of severe weather are most often associated with cold fronts. However, warm fronts and stationary fronts have on occasion produced tornadoes.
Tornadoes
Tornadoes can have low pressure at their center, typically around 800 mb. Hurricanes usually have even lower pressure at their center, below 900 mb. These low pressures are a result of the strong updrafts and rotation within these intense storm systems.
Low pressure
Tornadoes and hurricanes both produce low pressure.
Tornadoes can occur almost anywhere thunderstorms do, though most often in areas with a warm or temperate climate. They occur during thunder storms.
Stormy weather is associated with low pressure.
Tornadoes usually form from a kind of thunderstorm called a supercell.
Hurricanes usually spawn supercell tornadoes from supercells that form in their outer bands. These tornadoes are weaker on average than tornadoes from other storm systems.
Tornadoes produce very powerful winds. They occur during severe thunderstorms.
In a high pressure area, good warm weather will occur. In a low pressure area, colder rainy weather will occur.