Look out for anticrepuscular rays when airborne.

John Allen imaged these from a commercial airliner climbing over northern Florida late afternoon on January 21, 2002.   The sun was approximately 12° high - the rays and cloud shadows are converging to the antisolar point the same distance below the horizon. Anticrepuscular rays are sometimes more easily seen against the darker background of the ground.  Image ©2002 John Allen, shown with permission.