West Asia includes from Turkey to Afghanistan to Saudia Arabia & surrounding countries & Israel, Lebabnon, Syria, Jordan. 

Physical characteristics of this region are huge expanses of Deserts, several mountainous areas, & very little water. 12 degrees North to 42 degrees North. 

The climate ranges from Desert Semi-Arid to Tropical, Sub-Tropical to Alpine, steppe & continental 
Western AsiaWest AsiaSouthwestern Asia or Southwest Asia is the westernmost subregion of Asia. The concept is in limited use, as it significantly overlaps with the Middle East (or Near East), the main difference being the exclusion of Egypt (which would be counted as part of North Africa). The term is sometimes used for the purposes of grouping countries in statistics.