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Across 3. water droplets or ice crystals that gather together in the atmosphere 4. a circulation of winds around a center region of high atmospheric pressure, moving clockwise 7. a violent storm column caused by an extremely rapidly twirling updraft of low pressure 12. a scientist who studies atmosphere and weather 15. an intense low-pressure system of winds that spiral around a calm center 17. a violent storm with much thunder and lightning formed from rapid updrafts of warm, humid air 18. lines on a weather map that connect locations with the same barometric pressure 19. layered, low-altitude clouds

Down 1. clouds formed when weather conditions cause cumulus clouds to grow vertically because of rapidly rising water 2. a large-scale, wind and pressure system characterized by low pressure at its center and by circular motion 5. a stratus cloud that brings rain or snow 6. a sensitive radar system that monitors particle movement and is used to track storms 8. the area of earth science concerning the study of weather 9. a storm with very heavy snow, strong winds, and low temperatures 10. lines on a weather map that connect locations with the same temperature 11. thin, wispy,high-altitude clouds 13. a phenomenon that occurs when electricity travels between areas of opposite charges within a cloud, from cloud to cloud, or from cloud to the ground 14. a mound of water that is pushed toward the shore by a hurricane 16. thick, billowy clouds formed in the troposphere