11) What kind of storm forms when two different air masses meet?
12) How is a storm defined by the World Meteorological Organization (WMO)?
13) What type of storm has an updraft of warm, moist air and can form hail and lightning?
14) What type of storm is the most destructive?
15) Which storm can form in any season?
16) How many categories are hurricanes divided into?
17) In what month do most Atlantic hurricanes occur?
18) What is the most powerful type of storm?
19) What term is used to describe the clouds of a thunderstorm?
20) What is a supercell storm?