XM Satellite mosaic comes with the high end XM sat weather plan ($99 /m).

http://www.xmwxweather.com/aviation/...ce-pricing.php

http://www.xmwxweather.com/xmwx-data/data-products.php ((click satellite mosaic photo example and detailed description)

I know from my experience in power flying that this mosaic can be zoomed in to a useful level of detail down to say a task area (100 miles, but not to say a 10 mile zoom level).

Also as you can see from the description, clouds below 5000 are not displayed.

Description: Satellite Mosaic

Displays cloud cover over the continental United States and hundreds of miles off its coastline. An advanced formula estimates cloud temperatures at various altitudes across the country and converts them into estimated cloud height. Clouds below 5,000 feet are so close to ground temperatures, they are not shown.