Why do doors and windows automatically open during windy season?

Suppose air is flowing from west to east and door is facing north . Now, I know using Bernoulli's equation the air outside is flowing at higher speed when compared to air inside which creates a pressure difference and that's why doors and windows open.

Now what I don't understand is, if air is flowing from west to east (or parallel to w.r.t doors), why does the door automatically accelerate or move from rest perpendicular to the air.

This is quite opposite to flow of water in a pipe , in which liquid flow in direction to the pressure difference i.e parallel due pressure difference ?

What is the direction of force created by pressure difference?

• Pressure is not a vector, i.e. you can't assign a particular direction to it. Which implies that if pressure in a region/at a point is high it would apply a force in whichever direction there is a pressure difference. Commented Oct 18, 2021 at 3:12
• It's for the same reason of why do pipe's valve opens when water is beginning to flow in it, i.e. dynamic pressure of flow, in this case - wind (air flow) pressure. Commented Jul 8, 2022 at 8:58
• Pressure is a vector field, saying that it can't have a uniform direction is like saying on a rainy day that raindrops doesn't have a direction too. Commented Jul 8, 2022 at 10:53