Editing Cloud physics (section)

=====Orographic lift=====
{{Main|Orographic lift}}

A third source of lift is wind circulation forcing air over a physical barrier such as a [[mountain]] ([[orographic lift]]).<ref name="humidity, saturation, and stability"/> If the air is generally stable, nothing more than lenticular cap clouds will form. However, if the air becomes sufficiently moist and unstable, orographic showers or [[thunderstorm]]s may appear.<ref name="MT">Pidwirny, M. (2006). [http://www.physicalgeography.net/fundamentals/8e.html "Cloud Formation Processes"] {{webarchive|url=https://web.archive.org/web/20081220230524/http://www.physicalgeography.net/fundamentals/8e.html |date=2008-12-20 }}, chapter 8 in ''Fundamentals of Physical Geography'', 2nd ed.</ref>
[[File:Dreamy Twilight.jpg|thumb|Windy evening [[twilight]] enhanced by the Sun's angle, can visually mimic a [[tornado]] resulting from orographic lift]]