The argument that sports fans now access information 24/7 via mobile devices, Twitter, etc also holds true for the weather, doesn't it?
The only reason I tune into the local news is sports. I flip over to Ch. 2 at 6:24, 10:24 or 11:24 pm for the 3 minute sports update and that's it. The non-stop first look, extended forecast and last look at weather is way too much for me to handle. For me, a perfect weather segment would be one minute of the newscast - today's weather, tomorrow's weather, 5-day forecast. That's it.
I'd love to see a local station cut out all of the superfluous weather coverage and do an extended sports segment with in-depth interviews and features daily. They would get my allegiance and I bet most other Bills/Sabres fans too.