So after finding some water in the basement and spotting a bit of moldy, wet subfloor under my front door in two places, I decided I better find that leak. After much trial and error, I was finally able to locate where the water was coming in. It is coming in at both corners of the door. Here are some shots to help visually:
It is coming in where the grey strip stops and you can see the grooves. Is there something I can buy at the home improvement store to pop in there? Do I need to replace the entire grey strip? I am going to replace the entire door in the weeks to come as well as replace the moldy subfloor but until then, I need to get this water stopped. Any advice?