Wind

Wind can make a huge difference to our weather depending upon it’s speed or strength and which direction it is coming from.

Wind Speed

Wind speed can be measured using a number of scales.

Beaufort m/s mph km/h   knots Description
1 0.5 – 1.8 1 – 3 1.9 – 6.4   1   –  3 light air
2 1.9 – 3.3 4 – 7 6.5 – 12.0   4   –  6 light breeze
3 3.4 – 5.4 8 – 12 12.1 – 19.4   7   – 10 gentle breeze
4 5.5 – 7.9 13 – 17 19.5 – 28.7 11 – 15 breeze
5 8.0 – 11.0 18 – 24 28.8 – 39.8 16 – 21 fresh breeze
6 11.1 – 14.1 25 – 31 39.9 – 50.9 22 – 27 strong breeze
7 14.2 – 17.2 32 – 38 51.0 – 62.0 28 – 33 near gale
8 17.3 – 20.8 39 – 46 62.1 – 75.0 34 – 40 gale
9 20.9 – 24.4 47 – 54 75.1   – 87.9 41 – 47 strong gale
10 24.5 – 28.5 55 – 63 88.0 – 102.8 48 – 55 storm
11 28.6 – 32.6 64 – 72 102.9 – 117.6 56 – 63 violent storm
12 > 32.6 73 – 82 > 117.6 > 63 hurricane
  • What can you find out about the Beaufort Scale?
  • What is a knot?
  • How would you measure wind speed?
  • How does wind speed affect the weather?

Wind Direction

We measure wind direction as the direction from which the wind is coming from.

  • What would you use to measure wind direction?
  • How does wind direction affect the weather?