The uncertainty of the moment it will start to rain, whether the lane will dry out quickly or whether the rain will return will end up leaving lots of luck to influence a lot of races.
I suggest that next to the current climate indicator (temperature, rain volume) have a weather forecast indicator in 5 minutes.
The certainty of the forecast and / or time could be influenced by the Technical Director. The better the TD, the more accurate the forecast and / or the faster response time.
What do you think of the idea?
(sorry for Google's english)