This will carry the updrafts on the slopes diagonally upslope and upstream. The updrafts increase in velocity as they rise. The ridges are receiving scents from off the whole slope. As the side slopes go into shadow, downdrafts begin. It is good to search from the bottom up at this time.
Downdrafts are laminar, in thin layers, and flow down like water.
Debris piles and brush can act like a dam. Hollows and low shady spots may have scent pooling in them. The mouths of side drainages are good places to check in the shade and at night. Thunderstorm downdrafts push air out in all directions from directly under the cell at the mature stage. A dog can alert from a great distance, so note the location of the thunderhead and the wind direction if the dog alerts.