THE WEATHER

3. A high-pressure center of dry air.
5. An instrument used to measure changes in air pressure.
7. A rapidly whirling, funnel-shaped cloud that reaches down a storm cloud to touch the Earth’s surface.
9. An instrument used to measure wind speed.
10. A tropical cyclone that has winds of 119 KM/hr. or higher.
13. Low pressure warm air mass which forms in the tropics.
15. A thin glass tube with a bulb at one end containing alcohol or mercury which is used to measure temperature.
18. mass: A huge body of air that has similar temperature, humidity, and air pressure at any given height.
19. Whispery, feathery clouds made from ice crystals that form at high levels.
21. A small storm often accompanied by heavy precipitation and frequent thunder and lightning.
23. Clouds that form in flat layers and often cover much of the sky.

1. A sudden spark or electrical discharge formed when a charge jumps from cloud to cloud.
2. High pressure cold air mass which forms north of 50o north and south of 50o South.
4. A violent disturbance in the atmosphere.
6. surge: A dome of water that sweeps across the coast where the hurricane lands.
8. House effect: Gases form a blanket around the Earth that holds heat in the atmosphere.
11. Air mass that forms over land.
12. Air mass that forms over the ocean.
14. The boundary where air masses meet.
16. Fluffy, white clouds, usually with flat bottoms, that look like rounded piles of cotton.
17. A swirling center of low air pressure.
20. streams: Bands of high-speed winds about 10 kilometers above the Earth’s surface.
22. Cut off, as in a front where a warm air mass is caught between two cooler air masses.