Teshub was considered analogous to the Mesopotamian weather god, Adad. A degree of syncretism between them occurred across northern Syria and Upper Mesopotamia in the second millennium BCE due to the proliferation of new Hurrian dynasties, and eventually the rise of the empire of Mitanni, but its precise development is not possible to study yet due to lack of sources which could be a basis for case studies. While Hurrian rulers are not absent from sources from the Old Babylonian period, they attained greater relevance from the sixteenth century onwards, replacing the formerly predominant Amorite dynasties. As a result of this process, Teshub came to be regarded as the weather god of Aleppo. However, as Semitic languages continued to be spoken across the region, both names of weather gods continued to be used across the middle Euphrates area.
