I want to know the answer to the following question:
Where in Oklahoma does the semi-arid zone begin?
All the background I'm provided with is that "Traveling westward, the climate transitions progressively toward a semi-arid zone (Koppen BSk) in the high plains of the Panhandle and other western areas from about Lawton westward, less frequently touched by southern moisture.". Is that enough to answer the question?
Answer: yes