1. fair-weather electric field
2. sheet lightning
3. sprite
4. St. Elmo's fire
5. mesoscale
6. cumulus stage
7. thunder
8. air mass thunderstorm
9. return stroke
10. stepped leader
11. microburst
12. gust front
13. funnel cloud
14. tornado warning
15. waterspout
16. Tornado Alley
17. a large cluster of thunderstorms
tall objects glow, hiss, and emit sparks
most common and least destructive type of thunderstorm
flow of electrons when a leader meets a spark from the surface
a downburst with a diamter less than 4 km
where wedge of cold downdrafts meet warm air
a tornado-like vortex that is not touching the ground
region from the southern Great Plains to the lower Great Lakes
cloud-to-cloud lightning causing the sky to light uniformly
posted when a tornado has been spotted
a tornado-like vortex over water
mesoscale convective complex (MCC)
large, short-lived burst of light from tops of thunderstorms
rapid, staggered advance of negatively charged air
voltage difference between Earth's surface and ionosphere
sound produced by lightning heating and expanding air
the first stage of a thunderstorm
atmospheric features that are 10-1000 km in size