This may be of value to youse guys. It shows the last 1.5 hours in 15-minute increments. It does not refresh/update.
http://sirocco.accuweather.com/nx_mosaic_640x480c/RE/inmaREVA_.gif
Thanks. Appears to be something tied with accuweather, I used to be a big user of their site, but over time they became bloated and full of junk (the same thing that happened to Weather Channel site).
I actually use a weather app from my local NBC affiliate WKYC, like many it allows you to get weather info in any location you like. I just like their presentation style and variety of ways to look at things. Their main page is radar image with long range forecast below that, includes ability to show radar loops etc.
Generally for a local ride I don't worry too much about a chance of rain unless its over 50%. You're moving around enough that it could rain in one spot, and be clear a few miles away. As the time of ride gets closer I look at hourly forecasts provided and try to determine when its likely to rain, and if it is worth going out. I usually check at home, and 1-2 spots along the planned route.
My forecast for Saturday is 50% chance of rain, but most of that threat comes in the afternoon.