Where the wind has come from…. The wind speed is shown by the feathers. Five knots is added for each half a feather. In an exam you would be given a key. 10 knots. Winds are named after their origin.
In an exam you would be given a key. Eight Oktas- cloud cover. Heavy Rain. Sometimes a number may represent the temperature. 5
* 21 Snow, but no cloud cover. High temperature but snow! Unusually high winds, considering lack of cloud cover and temperature.