These images are generated by geostationary satellites orbiting 22,000 miles above the equator looking at the United States. These include visible, infrared and water vapor images. The images are updated once an hour at about 30 after the hour.
Satellite Surface Map
This is the infrared satellite image overlaid with the current surface weather map.
This is the infrared image overlaid with the radar summary. The infrared image will highlight the deeper/higher clouds as bright white and the radar summary allows you to correlate the high clouds with precipitation. The radar summary is stippled so that the image will partially show through the radar summary. Infrared Satellite Image Radar Summary