Catawba rhododendron bushes can reach a height of 6'-8' with a spread of 4'-6'. Displays are most effective when rhododendron bushes are massed together. These are poisonous plants -- do not allow children to ingest any of the azaleas or rhododendrons.
Best Answer: Tornadoes are caused by winds. When a tornado forms the wind pressure around the tornado drops and that's what you see on the barometer, the pressure goes down.
Atmospheric pressure changes because where the sun heats the earth, the warm air rises and that reduced the pressure. Where cold air sinks, it increases the pressure. The wind is simply the air trying to balance the pressure between those two systems.tmospheric pressure changes because where the sun heats the earth, the warm air rises and that reduced the pressure. Where cold air sinks, it increases the pressure. The wind is simply the air trying to balance the pressure between those two systems.