Water in the bottom track of window during rain?

Question: Why is there water in the bottom track of the window during rain?
Answer: During rain or when watering the grass, water will go through the window screen and into the bottom track. The window is designed in such a way that any water that is forced into the lower track will run to the corners and into these slots, it continues through to exit out of the drain holes located at the bottom outside of the window. Keeping the drainage slots and exit holes clear is a must for the window to function as designed.