When it rains, then I drive my yj ,I have water runing on my feet.Is my cowl gasket bad? It comes from under the dash somewhere.
Replaced the cowl (under windshield) and my leek stopped but I know if your actual cowl (vent at read of hood) is clogged it will do the same thing. Check drain first only takes about 2min to pull it and flush the hose out.
Check both and best of luck