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| Description: Local storms of short duration Features Violent windstorm Rotating column of air that extends down from a cumulonimbus cloud Low pressures inside causes the air to rush into the tornado Winds approach 480 km (300 miles) per hour Smaller suction vortices can form inside stronger tornadoes Occurrence and development Most frequent from April through June Associated with severe thunderstorms Exact cause of tornadoes formation is not known Picture Stats: Views: 353 Filesize: 1.62MB Height: 921 Width: 1367 Source: https://biology-forums.com/index.php?action=gallery;sa=view;id=39828 |