| NATS 101 Lecture 22 Air Masses |
| What is an Air Mass? |
| How Air Masses Form |
| Air Mass Source Regions |
| Air Mass Characteristics |
| Air Mass Source Regions for NA |
| Creation of cP Air Mass |
| Creation of cP Air Mass |
| Creation of mP Air Mass |
| Lake Effect Snows |
| Creation of mT and cT Air Masses |
| Contrasting Air Masses |
| Paths of cP Air Masses |
| cP Air Mass |
| Modification of cP Air Mass |
| mP Air Masses |
| cT Air Mass |
| Winter mT Pacific Air Masses |
| Weather Map with Air Masses |
| Summary |
| Assignment for Next Lecture |