Saw the Haar a lot when I was working in Shetland. Often rather more than a mere 20kts. 20kts was barely a light breeze there. Our limit was 50kts due to door opening limits (although higher windspeeds could be handled if we got the fire truck to park across the nose as a wind break).
It's really weird seeing the fog whip by while expending effort to stand against the wind.