Axios Pro Exclusive ContentExclusive: Sorcerer raises $3.9M for weather balloonsSorcerer's weather balloon floating above San Francisco. Photo courtesy of SorcererSorcerer, a Y Combinator weather balloon startup, has raised a $3.9 million seed round, the company tells Axios exclusively. Why it matters: Better weather data could help companies and governments navigate risk and extreme weather, but current methods are lacking.Zoom in: FCVC led the round, and was joined by Y Combinator, Collab Fund...