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.
Local heating of air, over a desert or a city, causes air to expand and become lower in pressure. Higher pressure air tries to fill in the gap but, again because of the coriolis effect, the air moves inward in a circular path, counter clockwise in the northern hemisphere and clockwise in the southern hemisphere.