Rather than hype stories about how giant melons are endangering the lives of the elderly, Channel 3 is trying something odd: original programming that focuses on one of the station's strengths. Crazy, isn't it?But that's what they're doing on Wednesday at 6 p.m., when they air "First with Severe Weather: 10 Ways to Survive the Storm." Featuring KMTV meteorologists Ryan McPike, Sarah Walters,