Losing Internet during bad weather.

Funny, I went from DSL to cable for more speed, and chose cable over satellite because I've seen satellite not work during bad weather. Now, when the weather is bad, I lose Internet. It's intermittent, one minute it works, next minute doesn't work, then works again. Only happens when it's rainy weather, but if it were a water in the cable problem seems like it wouldn't be so intermittent and there would be some delay once the rain stops as the connection dries. Digital TV still works fine. I ran new RG6 cable from the splitter and used the good PPC compression fittings so I'm disinclined to believe it's a cabling problem on my end. There's no water getting to any connections.

What has others experience been in this situation? I haven't called Cox yet; I do my own cabling so I'm a little afraid they'll just say that something needs redone just because it might not be the way they might do it.