Measurement of wind speed

The wind is measured at a height of 15 m above the roof. The velocity is measured in m s^-1. 1 m s^-1 equals 3.6 km h^-1 or 1.95 kn (knot ​​= 1 nautical mile per hour). The wind force according to Beaufort is determined by means of tables.

Measurement of wind direction

The wind is measured at a height of 15 m above the roof. A wind direction of 90 ° means easterly wind (i.e. wind from east = E or O), 180 ° equals southerly wind = S, 270 ° is westerly wind = W, and 360 ° (as well 0 ° = N) represents northerly wind.