Sometimes you just want it to start raining. Whether you have to let the dog out, organize a garden party with your in-laws, go for a walk. But... you don't want to and can not find a reason why. Yeah sure, when it's raining.
Hold on, maybe I can show you the weather forecast on my iPhone and there you can clearly see rain is coming :-)
You can select when, how long and how heavy the rain must be.