Hello.
Leaves and stuff often get into the cowl and plug up the drain holes which are located at either end of the cowl area.You have to remove the mud flaps from inside the front wheel wells.You will then see a hole that is about 3/4 inch tall and about 2inches wide.Take a coat hanger or something and rake all of the crud out of there and that should straighten it out, assuming that the condition hasn't existed for so long that it has rotted out the cowl.Hope that helps.