Addison Ch. 2 Book I

2. winter storm that lasts at least three hours with temp. of -12 c or below, poor visibility and winds of at least 51 km/h.
6. a stratus cloud that forms when air is cooled to its dew point near the ground.
7. state of the atmosphere at a specific time and place, determined by factors including air, temp., wind and precipitation.
8. lines drawn on a weather map that connect points having equal atmospheric pressure;also indicate the location of high- and low-pressure areas and can show wind speed
9. water falling from clouds including rain,snow,sleet,and hail whose form is determined by air temp.
13. model indicates weather conditions at a specific location, using a combination of symbols on a map.
14. amount of water vapor held in the air.
15. boundary between two air masses with different temps., density, or moisture; can be cold, warm, occluded, and stationary.

1. studies weather and uses information from Doppler radar, weather satellites, computers, and other instruments to make weather maps and provide forecasts.
3. violent, whirling windstorm that crosses land in a narrow path and can result from wind shears inside a thunderhead.
4. large, severe storm that forms over tropical oceans, has winds of at least 120 km/h, and loses power when it reaches land.
5. point temp. at which air is saturated and condensation forms.
10. humidity measure of the amount of moisture held in the air compared with the amount it can hold at a given temp; can range from 0% to 100%.
11. line drawn on a weather map that connects points having equal temps.
12. mass large body if air that has the same characteristics of temp. and moisture content as the part of earths surface over with it formed.