Weather Terms

5. The statistical collective of weather conditions over a specified period of time
6. The state of the atmosphere, usually short term, with respect to its effects upon life, property and human activities
8. A principal cloud type in the form of individual detached elements, sharp non-fibrous outlines, and vertical development
9. The temperature to which a parcel of air must be cooled to reach saturation
12. A closed circulation of the atmosphere, of relative high pressure. (clockwise flow in the northern hemisphere)
14. A homogenous mass of air, the properties of which can be identified as having been established while the air was situated over a particular region of the earth's surface
15. The leading edge of a relatively cold air mass.
17. The semi-permanent, semi-continuous front separating air masses of polar and tropical origin
18. All the various visible electrical discharges produced by thunderstorms. It can be cloud to cloud, cloud to ground, or cloud to air

1. A measure of the water vapor content of the air.
2. The ratio of the actual amount of water vapor in the air to the possible amount at that temperature
3. A closed isobaric circulation in the atmosphere, with counter-clockwise rotation in the northern hemisphere
4. Internal energy. A form of energy transferred between systems by virtue of a difference in temperature
7. A sudden brief increase in wind speed
10. The chance that a prescribed event will occur
11. Any or all the forms of water particles, liquid or solid, that fall from the atmosphere and reach the ground
13. A front that moves in such a way that warmer air replaces colder air
16. A cloud layer that covers most, or all of the sky