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.
Rating Newest Oldest. Best Answer: Yes, they very well do. Tornadoes need warm, moist air to form and intensify, and most people believe that this type of air is not possible during nighttime hours. But it is. The surface cools slower than the air, and the Sun's heat could still be on the surface.