On Sun, 16 Feb 2014 17:55:29 -0800 (PST), Greg Rodenhiser
wrote:

Yes the external sill slopes downward... I'm going to try adjusting the wooden portion under the door tomorrow, what's the term for that part?

Adjustable wooden threshold.

http://bscconstruction.files.wordpress.com/2009/11/11-11-09-noon-018.jpg