How would you weatherstrip this gap under an inswing exterior door? The door threshold is not very high, and the door already drags a bit on the interior carpet, so many styles of door threshold are out.
The gap ranges from 1/4" to 1/2", and is curved over the threshold width. Light is clearly visible under the gap.
A bottom threshold is possible, but Pemko #250V for example is way too high to fit (and as an extruded part wicks cold right from the outside to the inside, defeating the purpose somewhat).