@DL-Photo
The uncertainty of forecasts by weather models is provided by the Ensemble version of a model. Windy chose to show the Deterministic version of several models. This is a way to give an idea of the uncertainty of weather parameters such as precipitation.
In Meteograms you can select Compare. This feature allows you to see which is the dispersion of occurrence and of quantities of predicted rains for the next 5 days.
Here is an example in stormy conditions and uncertain weather:
F40A72FE-EA5F-49FA-ABB1-7B7A07066EA6.jpeg