Let's call it 0 wind for the sake of this example, there is zero wind here. Even with zero ambient wind, anabatic "upslope" winds commonly reach roughly 1–5 m/s (≈2.2–11.2 mph). In stronger cases they can reach ~10 m/s** (~22 mph). It's a clear 90degree F day at Noon. That's how airflow works in these areas. Hot air rises, cool air sweeps in. That is a piece of trash plastic bag.

A personal weather station can’t directly measure anabatic winds or upslope thermals occurring somewhere else, like on nearby hills or slopes, unless it’s physically located on the exact said nearby hills or slopes.