Examiner: What do we know about climate change and the effects on Colorado’s future water supplies? Actually that’s a trick question. We cannot know with anything with certainty because climate is just too complex. Water managers around the state are focused on planning for the future. That’s the nature of their job. For most, the planning has included an analysis of past precipitation and runoff statistics paired with forecasts for population and other uses. Precipitation, runoff dates and stream …