Weather
The weather is constantly changing. It can be bad weather now but fine weather in a few hours. You can forecast the weather a few days ahead, however you cannot say anything about the weather in exactly 30 days.
![Foto: Malene Thyssen, http://commons.wikimedia.org/wiki/User:Malene](https://isskolen.dk/wp/wp-content/uploads/Regnbyge.jpg)
Foto: Malene Thyssen, http://commons.wikimedia.org/wiki/User:Malene
The picture shows a good example of how the weather can change fast. The weather is nice where the photographer is standing but under the cloud the weather is quite bad.