Can anyone who is in the industry comment on how Autopilot performs in poor weather (ie. flash floods, thunderstorms, snowstorms etc...)

All I can find from the article about weather was in section 3.1:

> The manual includes several additional warnings related to system limitations, use near pedestrians and cyclists, and use on winding roads with sharp curves or with slippery surfaces or poor weather conditions. The system does not prevent operation on any road types.