Question

Which condition would most likely require the national Weather service to issue a severe thunderstorm warning? 1. A front moving out of an area. 2. A meeting of two air masses with major differences in temperature and moisture. 3. A large amount of moisture in the air condensing to form clouds. 4. An air mass developing over a large body of water.

Answer 1

2. A meeting of two air masses with major differences in temperature and moisture.