Shadow

This morning, the weather forecast (according to the BBC app) was for cloud all day, but no rain.

At lunchtime, the weatherman obviously looked out of the window and noticed that the rain was bucketing down.  The forecast on the app therefore changed to "Heavy rain, with chance of thunderstorms". 

A couple of hours later, the sun came out, producing strong shadows and drying all the surfaces, and it turned into quite a pleasant afternoon.  The weatherman had obviously looked out of the window again, because the forecast was now for a bright sunny afternoon.

From this, I conclude that I have all the necessary attributes* of a weather forecaster.


*A window.