You do realize that it's national centers, be they government or research entities, that create and run models, don't you? NCEP, the ECMWF, CMC, etc. The companies such as Weather Bell, Tropical Tidbits, and the like, merely use that data and package it with their own graphics for display. Yeah, they may do some of their own calculations to show precip type or snow amount, or other things like that, but they don't do the modeling.