Don’t think it’s been done before but I’m going to release a rare early advance tornado watch with a few tornado warnings around 10pm tonight to see how close they come to verifying based on guidance. I know the Moore Oklahoma tornado was warned before it even developed. Let’s see if any skill can be used to determine this 12+ hours out for our area. Would a longer tornado watch notice benefit the public if the NWS did this? Or do you prefer shorter notices the day of? This is experimental.
There was a guy who did that and he was shunned from the community. Even the NWS had to put a statement out that he is in no way affiliated with them. His products were made to mimick official forecasts though.