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Across 4. record of weather data for a specific place at a specific time, using meteorological symbols 10. balloon borne weather instrument whose sensors measure air pressure, humidity, temperature, wind speed and wind 12. band where the strongest winds in a hurricane are usually concentrated surrounding the eye 14. large, low pressure rotating tropical storm that gets its energy from the evaporation of warm water ocean water and release of heat HURRICANE 18. type of thunderstorm usually produced by an advancing cold front which can result in a line of thunderstorms hundreds of kilometers long 19. weather instrument used to measure humidity 20. violent whirling of columns of air in contact with the ground that forms when wind direction and speed suddenly changes in height; is often associated with a supercell and can be extremely damaging 21. change in the wave frequency that occur due to the wave as I t moves toward or away from an observer 22. classifies hurricanes according to wind speed on a scale ranging from Category 1 to Category 5

Down 1. classifies tornados according to their destruction and estimated wind speed on a scale ranging from EF 0 – EF 5 2. occurs when powerful hurricane-force winds drive a mound of ocean water toward shore, where it is overland, often causing enormous damage 3. violent downdrafts that are concentrated in a local area 5. line on a weather map connecting areas of equal temperature 6. extremely powerful, self-sustaining thunderstorm characterized by intense, rotating updrafts 7. weather forecast that uses numerical data to predict how atmospheric variables change over time 8. instrument used to measure air pressure 9. type of thunderstorm in which air rises because of unequal heating of Earth’s surface within a single air mass and is most common during the afternoon or evenings 11. weather forecast that compares current weather patterns to patterns that occurred in the past 13. calm center of a tropical cyclone that develops when the wind around its center reaches at least 120km/hr. 15. instrument used to measure temperature either Fahrenheit or Celsius 16. line on a weather map connecting areas of equal pressure 17. weather instrument used to measure wind speed