Across
- 2. A brief sudden increase in wind speed. Generally the duration is less than 20 seconds and the fluctuation greater than 10 mph.
- 5. A severe tropical cyclone with sustained winds over 74 mph (64 knots). Normally applied to such storms in the Atlantic Basin and the Pacific Ocean east of the International Date Line.
- 6. A significant body of air flowing in the same general circulation.
- 7. A rotating, cone-shaped column of air extending downward from the base of a thunderstorm but not touching the ground. When it reaches the ground it is called a tornado.
- 10. The semi-permanent, semi-continuous front that encircles the northern hemisphere separating air masses of tropical and polar origin.
- 12. An air mass that forms over water. It is usually humid, and may be cold or warm.
- 14. A form of oxygen in which the molecule is made of 3 atoms instead of the usual two. Ozone is usually found in the stratosphere, and responsible for filtering out much of the sun's ultraviolet radiation. It is also a primary component of smog.
Down
- 1. the first bad weather in spring after a warm period.
- 3. The pressure value obtained by the theoretical reduction or increase of barometric pressure to sea-level.
- 4. A person who studies meteorology. Some examples include research meteorologist, climatologist, operational meteorologist, TV meteorologist.
- 7. The formation of thin ice crystals on the ground or other surfaces. Frost develops when the temperature of the exposed surface falls below 32 degrees Fahrenheit and water vapor is deposited as a solid.
- 8. Any form of visible electrical discharges produced by thunderstorms.
- 9. Precipitation in the form of balls or irregular lumps of ice produced by liquid precipitation, freezing and being coated by layers of ice as it is lifted and cooled in strong updrafts of thunderstorms.
- 11. Sustained wind speeds from 34 to 47 knots (39 to 54 mph).
- 13. An active instrument (see active system) used to measure the altitude of an object above a fixed level.