The term “jet stream” is often used by weather forecasters to describe

In reality, the border between hot and cold air. But meteorologists tend to misuse it and describe it as any strong upper-atmosphere wind pattern for simplicity.  

It is hoped that these data will help residents, visitors, prospective residents, ... The climate is of a desert type with low annual rainfall and low relative humidity. ... drop below freezing during the three coldest months, but the afternoons are usually ... The change from the heat of summer to the mild winter temperatures (sorry if its wrong :(