Weather Three days in my favorite city hey Factors That Affect Wind: Pressure Gradient Forces, Coriolis Effect & Friction - Video & Lesson Transcript | Study.com Let's do a quick activity. Hold your hand out a few inches from your mouth, with your palm toward your face. Now open your mouth wide and blow onto your palm. The air that hits your palm is fairly warm. Now make your mouth into a tight 'O' and blow again.