I rode my bike to work today and will use the following radar site to try to time my return trip so that I don’t get too wet. There are a number of similar services but I like this one in particular. You can see where the rain clouds are at the moment and how they are expected to move over the next hour. Very useful!!
– Kirk
P.S. It’s a Japanese-language site but you don’t need any language skills to make sense of the images.