I use the images from
http://www.accuweather.com. Just find your city, right click on the image you want to use, and copy it to your device. You can also use any of the accuweather images from the dropdown box in WP. Just change the state (i.e., az_, nm_, etc.) except for California which is split into two sections and needs to be either cas or can. Hope this helps. - sheureka