Later in the day, head there.
As the day goes on and ground heats up, warm air rises from the bottom of draws, valleys, river canyons, creating an uphill or upstream breeze almost everywhere.
As the sun rises, hunt above and uphill from the best bird hideouts and you’ll help your dog intercept scent as he leads you along a ridgeline or down a draw.
Scott Linden Outdoors 
Southern exposures are a good place to start.
Yep. Was on one Saturday. It works.