Mammatus Clouds

After reading a friend's blog on clouds, it reminded me of an interaction I had with the chief meteorologist for Fox 31 in Denver. Chris kindly answered my question as to what kind of clouds I photographed last summer. 

Here is his email:

"Very cool clouds you saw at the Eisenhower Tunnel!  It appears from the photo that those clouds are a combination of rain shower “streamers,” or shafts of falling rain and Mammatus clouds.  They form only in connection with thunderstorms, and appear as pouch-like bubbles underneath the higher clouds, and are typically seen after the worst of the storm has passed.  For a more accurate/scientific description, click here:  http://en.wikipedia.org/wiki/Mammatus_cloud .  Hope that answers your question…and thanks for watching!"

There's your meteorology lesson for the day...