Not sure if you envision getting down to a consumer level in some way, but I race sailboats. There's plenty of people who use forecasting services to get a forecast tailored to a very small area for their race course or route (think 10 sq miles).

I'd presume that mountain bikers, kayakers, climbers, and really anyone else who is into sports that are dependent on weather may be interested in similar information.

Delivering the information to a community like that seems like it would be too niche for your service, but for the people that already offer services to those people, perhaps there'd be interest.