NATURE 4

6. A type of intense dust storm carried on an atmospheric gravity current, commonly observed in arid regions.
8. A sudden electrostatic discharge during a thunderstorm, often accompanied by a bright flash and thunder.
9. A form of precipitation consisting of ice pellets, often occurring when snowflakes partially melt as they fall through a warm layer of air.
10. A sudden, violent gust of wind often accompanied by rain or snow.
12. A violently rotating column of air extending from a thunderstorm to the ground.
13. A sudden, powerful, localized downdraft of air that can cause significant damage, especially to aircraft during takeoff and landing.
14. A system of winds rotating inward to an area of low atmospheric pressure, with a counterclockwise circulation in the Northern Hemisphere and a clockwise circulation in the Southern Hemisphere.
17. A seasonal wind that brings heavy rain, especially in the Indian subcontinent and Southeast Asia.
18. A severe tropical cyclone with powerful winds and heavy rain.

1. An arc of spectral colors that appears in the sky opposite the sun and is caused by the refraction, reflection, and dispersion of light in water droplets.
2. A prolonged period of excessively hot weather, often with high humidity.
3. A localized storm with thunder and lightning, often accompanied by heavy rain or hail.
4. A thick cloud of tiny water droplets suspended in the atmosphere at or near the Earth's surface, reducing visibility.
5. A tornado that occurs over a body of water, forming a funnel-shaped cloud and sucking up water.
7. A severe snowstorm characterized by strong winds, low temperatures, and poor visibility.
11. A storm with precipitation in the form of large hailstones.
15. A warm, dry wind that descends from the eastern slopes of the Rocky Mountains, often causing a rapid increase in temperature.
16. A covering of tiny ice crystals formed when the temperature drops below freezing and condenses directly from water vapor in the air.