Explanation: Wind vanes are used to measure wind direction. The vane points into the wind. For a more accurate reading, make arrow smaller than video shows (wanted it to be easily seen)!

"This is important for understanding atmospheric variables that could be problematic for small vehicles such as the Ingenuity helicopter that flew on Mars recently." When you purchase through links on ...

At the Met Office, we use a blend of cutting-edge technology and time-tested methods to observe and record the atmosphere’s most important elements. Here’s how we measure sunshine, cloud, visibility ...