Severe weather forecasters often feel the heat when it comes to getting forecasts correct and communicating clear, useful information to all members of the public. They know understated, overstated or just plain incorrect forecasts can cause people to tune-out, so they're always looking for ways to better communicate forecast uncertainty. In this second of two episodes on emergency weather, Rob Dale explains the practice of forecasting, what part of that work is easy, and what part involves nuance and finesse that computers cannot yet provide.